Alert archive / Illinois / Winter Storm Warnings in 2012
Winter Storm Warning 4, NWS Chicago, IL
NWS Chicago, IL issued this winter storm warning at Dec 19, 2012, 4:03 AM CST for 12 counties in Illinois; Lake County, Porter County, Indiana. It took effect at Dec 20, 2012, 12:00 PM CST. It was in force for 15 hr. 28 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 19, 2012, 4:03 AM CST (10:03 UTC)
- In effect from
- Dec 20, 2012, 12:00 PM CST
- Expired
- Dec 21, 2012, 3:00 AM CST
- In force
- 15 hr
- Issued by
- NWS Chicago, IL
Counties Boone County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 42 km from the middle of the area, began a volume at 10:03 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 20, 1:59 PM CST | SNOW 0 | Rockford, IL | HALF DOLLAR SIZED FLAKES BEGAN TO FALL. |
| Dec 20, 2:00 PM CST | SNOW 0 | Rockford, IL | WTVO REPORTED SNOWING AT THE STATION AND BEGINNING TO ACCUMULATE ON CARS. |
| Dec 20, 2:11 PM CST | SNOW 0 | Dixon, IL | STARTING TO SNOW IN DIXON. |
| Dec 20, 2:20 PM CST | HEAVY SNOW 0 | Rockford, IL | EXTREMELY HEAVY SNOW FALL RATE, SNOW BEGINNING TO COVER GROUND, VISIBILITY ABOUT 1/4 MILE. A FEW REPORTED SNOW COVERED ROADS. RAIN CHANGED TO SNOW APPROXIMATELY 145 PM. |
| Dec 20, 2:30 PM CST | SNOW 0 | Cherry Valley, IL | SNOW STARTED |
| Dec 20, 2:48 PM CST | SNOW 0 | Belvidere, IL | SNOW COVERED SLICK ROADS. |
| Dec 20, 3:05 PM CST | HEAVY SNOW 0 | Rockford, IL | POWER OUTAGE DUE TO SNOW. ONE INCH MEASURED SNOW. SNOW STILL FALLING. |
| Dec 20, 3:21 PM CST | HEAVY SNOW 1 | Capron, IL | ONE INCH OF NEW SNOWFALL OVER THE PAST HOUR. RAIN TURNED TO SNOW 220 PM SNOW COVERING ROADS, POWERLINES, TREE BRANCHES, ROADS SLIPPERY AND POWER FLICKERING. TENDENCY TO SLIDE ON ROADWAYS. |
| Dec 20, 3:26 PM CST | SNOW 0 | Richmond, IL | RAIN ENDED, SNOW BEGAN 214 PM. |
| Dec 20, 3:39 PM CST | SNOW 2 | Rockford, IL | LOW VISIBLITY ALSO. |
| Dec 20, 3:55 PM CST | SNOW 0 | Antioch, IL | LARGE SNOW FLAKES NEAR ROUTE 59/173. RAIN SNOW MIXTURE TRANSITIONING OVER. |
| Dec 20, 4:40 PM CST | SNOW 0.1 | 1 W Beach Park, IL | SNOW RAIN MIX AT 430 PM AND CHANGED TO ALL SNOW BY 440 PM. MODERATE SNOWFALL RATE. VERY LARGE FLAKES. ACCUMULATING QUITE QUICKLY ON ALL SURFACES. |
| Dec 20, 5:02 PM CST | HEAVY SNOW 0.5 | Elburn, IL | MODERATE TO HEAVY SNOW COMING DOWN |
| Dec 20, 5:16 PM CST | SNOW 0 | Elgin, IL | RAIN BEGAN TRANSITIONING TO SNOW AROUND 420 PM. |
| Dec 20, 5:48 PM CST | SNOW 2.5 | 2 N Winnebago, IL | MEASURED AT WREX-TV |
| Dec 20, 5:50 PM CST | SNOW 0 | Oak Brook, IL | CAR TOPS COVERED... SNOW STARTING TO STICK TO GRASS... LARGE FLAKES. RAIN SNOW MIX CHANGED TO ALL SNOW AT 545 PM. |
| Dec 20, 5:55 PM CST | SNOW 0.5 | Rockford Airport, IL | |
| Dec 20, 6:30 PM CST | SNOW 1 | N Huntley, IL | ONE INCH OF SNOW ON THE GROUND. ROADS ARE SLUSHY. FLURRIES AND WIND CURRENTLY. |
| Dec 20, 6:40 PM CST | SNOW 0.5 | Clarendon Hills, IL | |
| Dec 20, 7:00 PM CST | SNOW 1.2 | Grayslake, IL | |
| Dec 20, 7:00 PM CST | HEAVY SNOW 3.3 | Mount Morris, IL | |
| Dec 20, 7:03 PM CST | SNOW 0 | Machesney Park, IL | MODERATE SNOW FALLING... NEAR WHITE OUT CONDITIONS. |
| Dec 20, 7:56 PM CST | SNOW 3.5 | 2 Ne Roscoe, IL | |
| Dec 20, 8:30 PM CST | SNOW 3.9 | 2 N Winnebago, IL | WREX-TV |
| Dec 20, 8:30 PM CST | BLIZZARD | 5 S Mendota, IL | SNOW AND BLOWING SNOW TOGETHER REDUCING VISIBILITY TO UNDER 100 FEET AT TIMES. DELAYED REPORT. |
| Dec 20, 9:55 PM CST | SNOW 0.9 | Cary, IL | |
| Dec 20, 10:00 PM CST | SNOW 3.9 | Polo, IL | 1/2 MILE VISIBILITY...MAINLY DUE TO BLOWING SNOW. |
| Dec 21, 12:00 AM CST | SNOW 1.4 | Rockford Airport, IL | OFFICIAL SNOWFALL TOTAL FOR ROCKFORD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 10.1 hours before the alert went out and 172 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 556 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
281 WWUS43 KLOT 191003 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 403 AM CST WED DEC 19 2012 ILZ003-004-008-010-191815- /O.UPG.KLOT.WS.A.0005.121220T1200Z-121221T0600Z/ /O.NEW.KLOT.WS.W.0004.121220T1500Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 403 AM CST WED DEC 19 2012 ...WINTER STORM WARNING IN EFFECT FROM 9 AM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR SNOW...BLOWING SNOW...AND STRONG WINDS. THE WARNING IS IN EFFECT FROM 9 AM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...RAIN WILL CHANGE TO WET SNOW LATE THURSDAY MORNING OR EARLY THURSDAY AFTERNOON WITH SNOW...POSSIBLY HEAVY AT TIMES...LIKELY TO LINGER INTO EARLY THURSDAY EVENING. STRONG WINDS WILL DEVELOP THURSDAY AFTERNOON AND CONTINUE THURSDAY EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO 6 INCHES ARE LIKELY...HOWEVER THE AMOUNTS WILL DEPEND HEAVILY ON HOW QUICKLY THE RAIN CHANGES TO SNOW. IF THE CHANGE OVER OCCURS EARLY ENOUGH THEN HEAVIER SNOW AMOUNTS COULD OCCUR. CONVERSELY...IF THE CHANGE OVER WERE TO BE LATER THURSDAY THEN ACCUMULATIONS COULD END UP LESS THAN 3 INCHES. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS UP BETWEEN 40 AND 50 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-011-191815- /O.EXT.KLOT.WS.A.0005.121220T1800Z-121221T0600Z/ MCHENRY-DE KALB- INCLUDING THE CITIES OF...WOODSTOCK...DEKALB 403 AM CST WED DEC 19 2012 ...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY EVENING... * TIMING...RAIN WILL CHANGE TO WET SNOW THURSDAY AFTERNOON WITH SNOW...POSSIBLY HEAVY AT TIMES...LIKELY TO LINGER INTO THURSDAY EVENING. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 4 INCHES ARE POSSIBLE...HOWEVER THE AMOUNTS WILL DEPEND HEAVILY ON HOW QUICKLY THE RAIN CHANGES TO SNOW. IF THE CHANGE OVER OCCURS EARLY ENOUGH THEN HEAVIER SNOW AMOUNTS COULD OCCUR...CONVERSELY IF THE CHANGE OVER WERE TO BE LATER THURSDAY THEN ACCUMULATIONS COULD END UP ON THE LOWER END OF THAT RANGE. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS UP BETWEEN 40 AND 50 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$ IZZI
10 follow-up statements
267 WWUS43 KLOT 191641 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1041 AM CST WED DEC 19 2012 ILZ003-004-008-010-200045- /O.CON.KLOT.WS.W.0004.121220T1500Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 1041 AM CST WED DEC 19 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 AM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW LATE THURSDAY MORNING OR EARLY THURSDAY AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THURSDAY AFTERNOON AND CONTINUE THURSDAY EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 4 TO 7 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS UP BETWEEN 40 AND 50 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ019-200045- /O.EXB.KLOT.WS.A.0005.121220T1800Z-121221T1200Z/ LA SALLE- INCLUDING THE CITY OF...OTTAWA 1041 AM CST WED DEC 19 2012 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT. * TIMING...RAIN WILL CHANGE TO WET SNOW THURSDAY AFTERNOON...AND POSSIBLY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 4 INCHES ARE POSSIBLE...THOUGH HEAVIER SNOW AMOUNTS COULD OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH LATE THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS TO 50 TO 60 MPH PROBABLE. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$ ILZ006-012>014-020>022-INZ001-002-200045- /O.EXB.KLOT.WS.A.0005.121221T0000Z-121221T1200Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 1041 AM CST WED DEC 19 2012 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT. * TIMING...RAIN WILL CHANGE TO WET SNOW FROM WEST TO EAST LATE THURSDAY AFTERNOON INTO THURSDAY EVENING...POSSIBLY HEAVY AT TIMES...LINGERING THROUGH THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS MORE FAVORED TO BE IN THE NORTH AND NORTHWEST SUBURBS OF CHICAGO. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS TO 50 TO 60 MPH PROBABLE. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE LATTER PORTION OF THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$ ILZ005-011-200045- /O.EXT.KLOT.WS.A.0005.121220T1800Z-121221T1200Z/ MCHENRY-DE KALB- INCLUDING THE CITIES OF...WOODSTOCK...DEKALB 1041 AM CST WED DEC 19 2012 ...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW BY LATE THURSDAY AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6 INCHES ARE LIKELY. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP BETWEEN 40 AND 50 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$ RC
713 WWUS43 KLOT 192157 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 357 PM CST WED DEC 19 2012 ILZ005-011-019-200600- /O.UPG.KLOT.WS.A.0005.121220T1800Z-121221T1200Z/ /O.EXB.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ MCHENRY-DE KALB-LA SALLE- INCLUDING THE CITIES OF...WOODSTOCK...DEKALB...OTTAWA 357 PM CST WED DEC 19 2012 ...WINTER STORM WARNING IN EFFECT FROM 3 PM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR SNOW...BLOWING SNOW...AND STRONG WINDS. THE WARNING IS IN EFFECT FROM 3 PM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...RAIN WILL CHANGE TO WET SNOW BY MID TO LATE THURSDAY AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS IN DEKALB AND MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 40 MPH THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO AROUND 60 MPH IN LASALLE COUNTY. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ003-004-008-010-200600- /O.EXT.KLOT.WS.W.0004.121220T1800Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 357 PM CST WED DEC 19 2012 ...WINTER STORM WARNING NOW IN EFFECT FROM NOON THURSDAY TO MIDNIGHT CST THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW EARLY EARLY THURSDAY AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THURSDAY AFTERNOON AND CONTINUE THURSDAY EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 4 TO 7 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS UP BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ006-012>014-020>022-INZ001-002-200600- /O.CON.KLOT.WS.A.0005.121221T0000Z-121221T1200Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 357 PM CST WED DEC 19 2012 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW FROM WEST TO EAST LATE THURSDAY AFTERNOON INTO THURSDAY EVENING...AND LIKELY BE HEAVY AT TIMES...LINGERING THROUGH THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS MORE FAVORED TO BE IN THE NORTH AND NORTHWEST SUBURBS OF CHICAGO. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS TO 50 TO 60 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE LATTER PORTION OF THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW AND STRONG WINDS THAT MAY IMPACT TRAVEL. && $$ RC/MTF
881 WWUS43 KLOT 200357 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 957 PM CST WED DEC 19 2012 ILZ003-004-008-010-201200- /O.CON.KLOT.WS.W.0004.121220T1800Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 957 PM CST WED DEC 19 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON THURSDAY TO MIDNIGHT CST THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW EARLY EARLY THURSDAY AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THURSDAY AFTERNOON AND CONTINUE THURSDAY EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 4 TO 7 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS UP BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-011-019-201200- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ MCHENRY-DE KALB-LA SALLE- INCLUDING THE CITIES OF...WOODSTOCK...DEKALB...OTTAWA 957 PM CST WED DEC 19 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW BY MID TO LATE THURSDAY AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS IN DEKALB AND MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 40 MPH THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO AROUND 60 MPH IN LASALLE COUNTY. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ006-012>014-020>022-INZ001-002-201200- /O.CON.KLOT.WS.A.0005.121221T0000Z-121221T1200Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 957 PM CST WED DEC 19 2012 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * TIMING...RAIN WILL CHANGE TO WET SNOW FROM WEST TO EAST LATE THURSDAY AFTERNOON INTO THURSDAY EVENING...AND LIKELY BE HEAVY AT TIMES...LINGERING THROUGH THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS MORE FAVORED TO BE IN THE NORTH AND NORTHWEST SUBURBS OF CHICAGO. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS TO 50 TO 60 MPH EXPECTED. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE LATTER PORTION OF THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. THE GREATEST CHANCE FOR BLIZZARD CONDITIONS IS LIKELY NEAR THE LAKE AND PORTER COUNTY INDIANA SHORELINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW AND STRONG WINDS THAT MAY IMPACT TRAVEL. && $$ MDB
414 WWUS43 KLOT 200946 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 346 AM CST THU DEC 20 2012 ILZ003-004-008-010-201800- /O.CAN.KLOT.WS.W.0004.121220T1800Z-121221T0600Z/ /O.NEW.KLOT.BZ.W.0002.121220T1800Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 346 AM CST THU DEC 20 2012 ...BLIZZARD WARNING IN EFFECT FROM NOON TODAY TO MIDNIGHT CST TONIGHT... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO MIDNIGHT CST TONIGHT. THE WINTER STORM WARNING HAS BEEN CANCELLED. * TIMING...RAIN WILL CHANGE TO SNOW EARLY EARLY THIS AFTERNOON...WITH SNOW BECOMING HEAVY AT TIMES. SNOW WILL LINGER INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THIS AFTERNOON AND CONTINUE THIS EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 6 TO 9 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOW COULD ACCUMULATE IN EXCESS OF 1 TO 2 INCHES PER HOUR DURING THE MID AND LATE AFTERNOON HOURS. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THIS AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS WILL RESULT IN BLIZZARD CONDITIONS WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND VERY HEAVY SNOWFALL RATES WILL MAKE TRAVEL EXTREMELY DANGEROUS OR EVEN IMPOSSIBLE AT TIMES GIVEN THAT IT MAY BE VERY DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ ILZ006-012>014-020>022-INZ001-002-201800- /O.UPG.KLOT.WS.A.0005.121221T0000Z-121221T1200Z/ /O.EXB.KLOT.WS.W.0004.121220T2100Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 346 AM CST THU DEC 20 2012 ...WINTER STORM WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO 3 AM CST FRIDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR INTENSE SNOWFALL RATES...HIGH WINDS...REDUCED VISIBILITY...AND BLOWING AND DRIFTING SNOW...WHICH IS IN EFFECT FROM 3 PM THIS AFTERNOON TO 3 AM CST FRIDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...RAIN WILL CHANGE TO SNOW FROM WEST TO EAST LATE THIS AFTERNOON INTO THIS EVENING...WITH SNOW LIKELY BEING HEAVY AT TIMES. THE HEAVIEST SNOWFALL AND LOWEST VISIBILITY LOOKS TO OCCUR IN THE IMMEDIATE CHICAGO METRO AREA BETWEEN 5 AND 9 PM. SNOW WILL LINGER THROUGH THURSDAY NIGHT. VERY STRONG WINDS WILL DEVELOP AS THE SNOW ARRIVES AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: SOME UNCERTAINTY CONTINUES WITH REGARD TO SNOW AMOUNTS BUT CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO POSSIBLY 6 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS FAVORED ACROSS THE FAR NORTH AND NORTHWEST SUBURBS OF CHICAGO...AND ACROSS NORTHEAST PORTER COUNTY INDIANA. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THIS AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS TO 50 TO 60 MPH EXPECTED. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...THE COMBINATION OF THE INTENSE SNOWFALL AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. THE GREATEST CHANCE FOR BLIZZARD OR NEAR BLIZZARD CONDITIONS IS NEAR THE LAKE AND PORTER COUNTY INDIANA SHORELINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-011-019-201800- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ MCHENRY-DE KALB-LA SALLE- INCLUDING THE CITIES OF...WOODSTOCK...DEKALB...OTTAWA 346 AM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID AFTERNOON HOURS TODAY...AND LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW WILL LINGER INTO THURSDAY NIGHT. VERY STRONG WINDS WILL DEVELOP AS SNOW ARRIVES AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO 7 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO AROUND 60 MPH IN LASALLE COUNTY. * IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ MDB/RATZER
202 WWUS43 KLOT 201618 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1018 AM CST THU DEC 20 2012 ILZ003-004-008-010-210030- /O.CON.KLOT.BZ.W.0002.121220T1800Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 1018 AM CST THU DEC 20 2012 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW BY EARLY AFTERNOON...WITH SNOW BECOMING HEAVY AT TIMES. SNOW WILL LINGER INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THIS AFTERNOON AND CONTINUE THIS EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 6 TO 9 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOW COULD ACCUMULATE IN EXCESS OF 1 TO 2 INCHES PER HOUR DURING THE MID AND LATE AFTERNOON HOURS. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THIS AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS WILL RESULT IN BLIZZARD CONDITIONS WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND VERY HEAVY SNOWFALL RATES WILL MAKE TRAVEL EXTREMELY DANGEROUS OR EVEN IMPOSSIBLE AT TIMES GIVEN THAT IT MAY BE VERY DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ ILZ006-012>014-020>022-INZ001-002-210030- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 1018 AM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO 3 AM CST FRIDAY... * TIMING...RAIN WILL CHANGE TO SNOW FROM WEST TO EAST LATE THIS AFTERNOON OR EARLY THIS EVENING...WITH SNOW BECOMING HEAVY AT TIMES. THE HEAVIEST SNOWFALL AND LOWEST VISIBILITY SHOULD OCCUR IN THE IMMEDIATE CHICAGO METRO AREA BETWEEN 5 AND 9 PM. SNOW WILL LINGER THROUGH THE NIGHT TONIGHT. VERY STRONG WINDS WILL DEVELOP AS THE SNOW ARRIVES AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION:CURRENT INDICATORS SUGGEST THAT TOTALS OF 2 TO AS MUCH AS 6 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS FAVORED ACROSS THE FAR NORTH AND NORTHWEST SUBURBS OF CHICAGO...AND ACROSS NORTHEAST PORTER COUNTY INDIANA. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THIS AFTERNOON AND CONTINUE THROUGH THE NIGHT WITH GUSTS TO 50 TO 60 MPH EXPECTED. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...THE COMBINATION OF THE INTENSE SNOWFALL AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. THE GREATEST CHANCE FOR BLIZZARD OR NEAR BLIZZARD CONDITIONS IS NEAR THE LAKE AND PORTER COUNTY INDIANA SHORELINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-011-019-210030- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ MCHENRY-DE KALB-LA SALLE- INCLUDING THE CITIES OF...WOODSTOCK...DEKALB...OTTAWA 1018 AM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID TO LATE AFTERNOON HOURS TODAY...AND LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS SNOW ARRIVES AND CONTINUE OVERNIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO 7 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO AROUND 60 MPH IN LASALLE COUNTY. * IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ KREIN
160 WWUS43 KLOT 201821 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1221 PM CST THU DEC 20 2012 ILZ011-019-210230- /O.CAN.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ /O.EXA.KLOT.BZ.W.0002.000000T0000Z-121221T0600Z/ DE KALB-LA SALLE- INCLUDING THE CITIES OF...DEKALB...OTTAWA 1221 PM CST THU DEC 20 2012 ...BLIZZARD WARNING IN EFFECT UNTIL MIDNIGHT CST TONIGHT... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT UNTIL MIDNIGHT CST TONIGHT. THE WINTER STORM WARNING HAS BEEN CANCELLED. * TIMING...RAIN WILL CHANGE TO SNOW BY EARLY TO MID AFTERNOON..AND WILL BE HEAVY AT TIMES. THE SNOW WILL TAPER OFF AND LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS SNOW ARRIVES AND CONTINUE OVERNIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 4 TO 7 INCHES ARE LIKELY. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH THIS AFTERNOON AND CONTINUE TONIGHT WITH GUSTS BETWEEN 45 AND 55 MPH LIKELY IN DEKALB COUNTY...TO AROUND 60 MPH IN LASALLE COUNTY. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS WILL RESULT IN BLIZZARD CONDITIONS...WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND VERY HEAVY SNOWFALL RATES WILL MAKE TRAVEL EXTREMELY DANGEROUS OR EVEN IMPOSSIBLE AT TIMES GIVEN THAT IT MAY BE VERY DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ ILZ003-004-008-010-210230- /O.CON.KLOT.BZ.W.0002.000000T0000Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 1221 PM CST THU DEC 20 2012 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW BY EARLY AFTERNOON...WITH SNOW BECOMING HEAVY AT TIMES. SNOW WILL LINGER INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THIS AFTERNOON AND CONTINUE THIS EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 6 TO 9 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOW COULD ACCUMULATE IN EXCESS OF 1 TO 2 INCHES PER HOUR DURING THE MID AND LATE AFTERNOON HOURS. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH THIS AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS WILL RESULT IN BLIZZARD CONDITIONS WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND VERY HEAVY SNOWFALL RATES WILL MAKE TRAVEL EXTREMELY DANGEROUS OR EVEN IMPOSSIBLE AT TIMES GIVEN THAT IT MAY BE VERY DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ ILZ006-012>014-020>022-INZ001-002-210230- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 1221 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY... * TIMING...RAIN WILL CHANGE TO SNOW FROM WEST TO EAST LATE THIS AFTERNOON OR EARLY THIS EVENING...WITH SNOW BECOMING HEAVY AT TIMES. THE HEAVIEST SNOWFALL AND LOWEST VISIBILITY SHOULD OCCUR IN THE IMMEDIATE CHICAGO METRO AREA BETWEEN 5 AND 9 PM. SNOW WILL LINGER THROUGH THE NIGHT TONIGHT. VERY STRONG WINDS WILL DEVELOP AS THE SNOW ARRIVES AND CONTINUE THURSDAY NIGHT. * SNOW ACCUMULATION:CURRENT INDICATORS SUGGEST THAT TOTALS OF 2 TO AS MUCH AS 6 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS FAVORED ACROSS THE FAR NORTH AND NORTHWEST SUBURBS OF CHICAGO... AND ACROSS NORTHEAST PORTER COUNTY INDIANA. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THIS AFTERNOON AND CONTINUE THROUGH THE NIGHT WITH GUSTS TO 50 TO 60 MPH EXPECTED. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...THE COMBINATION OF THE INTENSE SNOWFALL AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. THE GREATEST CHANCE FOR NEAR BLIZZARD CONDITIONS IS NEAR THE LAKE AND PORTER COUNTY INDIANA SHORELINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-210230- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ MCHENRY- INCLUDING THE CITY OF...WOODSTOCK 1221 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID TO LATE AFTERNOON HOURS TODAY...AND LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS SNOW ARRIVES AND CONTINUE OVERNIGHT. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO 7 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO AROUND 60 MPH IN LASALLE COUNTY. * IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ KREIN
334 WWUS43 KLOT 202046 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 246 PM CST THU DEC 20 2012 ILZ003-004-008-010-011-019-210500- /O.CON.KLOT.BZ.W.0002.000000T0000Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA 246 PM CST THU DEC 20 2012 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE OVER TO SNOW THROUGH THE AFTERNOON AND EARLY EVENING...WITH SNOW BECOMING HEAVY AT TIMES. SNOW WILL LINGER THROUGH THE NIGHT. NORTHWESTERLY WINDS CONTINUE TO STRENGTHEN THROUGH THE AFTERNOON AND PERSIST THROUGH THE NIGHT. * SNOW ACCUMULATION: TOTAL ACCUMULATION OF 6 TO 9 INCHES IS LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOW COULD ACCUMULATE IN EXCESS OF 1 TO 2 INCHES PER HOUR DURING THE LATE AFTERNOON AND EARLY EVENING HOURS. * WIND: NORTHWEST WINDS OF 30 TO 40 MPH WITH GUSTS BETWEEN 45 AND 55 MPH ARE EXPECTED. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS WILL RESULT IN BLIZZARD CONDITIONS WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND VERY HEAVY SNOWFALL RATES WILL MAKE TRAVEL EXTREMELY DANGEROUS OR EVEN IMPOSSIBLE AT TIMES GIVEN THAT IT MAY BE VERY DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40 MPH WILL CONTINUE AS THE SNOW WINDS DOWN TONIGHT...RESULTING IN CONTINUED BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO DANGEROUSLY LOW LEVELS...FROM ZERO TO FIVE BELOW ZERO BY EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ ILZ006-012>014-020>022-INZ001-002-210500- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 246 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY... * TIMING...RAIN WILL CHANGE TO SNOW FROM WEST TO EAST LATE THIS AFTERNOON OR EARLY THIS EVENING...WITH SNOW BECOMING HEAVY AT TIMES. THE HEAVIEST SNOWFALL AND LOWEST VISIBILITY SHOULD OCCUR IN THE IMMEDIATE CHICAGO METRO AREA BETWEEN 6 AND 10 PM. SNOW WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS THE SNOW ARRIVES AND CONTINUE THROUGH THE NIGHT. * SNOW ACCUMULATION: TOTALS OF 2 TO AS MUCH AS 6 INCHES ARE POSSIBLE...WITH THE HIGHEST AMOUNTS ACROSS THE FAR NORTH AND NORTHWEST SUBURBS OF CHICAGO...AND NORTHEAST PORTER COUNTY INDIANA. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH BY LATE THIS AFTERNOON AND CONTINUE THROUGH THE NIGHT WITH GUSTS TO 50 TO 60 MPH EXPECTED. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...THE COMBINATION OF THE INTENSE SNOWFALL AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THIS WILL LIKELY IMPACT THE EVENING RUSH HOUR. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. THE GREATEST CHANCE FOR NEAR BLIZZARD CONDITIONS IS NEAR THE LAKE AND PORTER COUNTY INDIANA SHORELINE. WINDS WILL CONTINUE TO GUST TO 40 TO 55 MPH THROUGH DAYBREAK FRIDAY...HIGHEST ON THE INDIANA LAKEFRONT. THIS WILL RESULT IN CONTINUED BLOWING AND DRIFTING SNOW AS THE SNOW WINDS DOWN...ESPECIALLY IN OPEN AREAS. WIND CHILL VALUES WILL PLUMMET TO THE SINGLE DIGITS BY EARLY FRIDAY MORNING. A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-210500- /O.CON.KLOT.WS.W.0004.121220T2100Z-121221T0600Z/ MCHENRY- INCLUDING THE CITY OF...WOODSTOCK 246 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW DURING THE LATE AFTERNOON HOURS...AND WILL LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS SNOW ARRIVES AND CONTINUE OVERNIGHT. * SNOW ACCUMULATION: TOTALS OF 3 TO 7 INCHES ARE LIKELY. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE. * WIND: NORTHWEST WINDS TO 30 TO 40 MPH WILL CONTINUE THROUGH THE NIGHT WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40 MPH WILL CONTINUE THROUGH EARLY FRIDAY...RESULTING IN CONTINUED BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO NEAR ZERO BY EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ KREIN/RC
793 WWUS43 KLOT 210129 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 729 PM CST THU DEC 20 2012 ILZ003-004-008-010-011-019-210600- /O.CON.KLOT.BZ.W.0002.000000T0000Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA 729 PM CST THU DEC 20 2012 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...A BROAD BAND OF LIGHT TO MODERATE SNOW WILL CROSS THE WARNED AREA THROUGH THE MID EVENING HOURS. NORTHWEST WINDS WILL FURTHER INCREASE THROUGH THE EVENING. * SNOW ACCUMULATION: ADDITIONAL SNOW ACCUMULATION OF 1 TO PERHAPS 2 INCHES IS EXPECTED THIS EVENING RESULTING IN TOTAL ACCUMULATIONS OF AROUND 3 TO 6 INCHES WITH ISOLATED SLIGHTLY HIGHER AMOUNTS POSSIBLE. * WIND: NORTHWEST WINDS WILL INCREASE TO 30 TO 40 MPH WITH GUSTS BETWEEN 45 AND 55 MPH THIS EVENING. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS MAY RESULT IN BLIZZARD CONDITIONS WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND SNOWFALL WILL MAKE TRAVEL EXTREMELY DANGEROUS ACROSS THE AREA AND EVEN IMPOSSIBLE IN SPOTS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40 MPH WILL CONTINUE OVERNIGHT...RESULTING IN CONTINUED BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO DANGEROUSLY LOW LEVELS...FROM ZERO TO FIVE BELOW ZERO BY EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ ILZ006-012>014-020>022-INZ001-002-210900- /O.CON.KLOT.WS.W.0004.000000T0000Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 729 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY... * TIMING...ONE BAND OF PRECIPITATION WILL CONTINUE TO MOVE SOUTHEASTWARD FROM CHICAGO TO WILMINGTON AND POINTS EAST ACROSS NORTHWEST INDIANA THROUGH MID EVENING. MUCH OF THIS BAND IS FALLING AS RAIN WITH WESTWARD PORTION CHANGING TO SNOW. COLDER AIR IS SPREADING IN FROM THE SOUTH SO RAIN COVERAGE MAY DIMINISH IN FAVOR OF SNOW IN THE NEXT FEW HOURS. LIGHTER SNOWFALL WILL CONTINUE AS THIS BAND DEPARTS THROUGH MID AND LATE EVENING. ANOTHER MORE INTENSE BAND OF SNOW MAY AFFECT THE CHICAGO METRO AREA CLOSER TO MIDNIGHT AND NORTHWEST INDIANA THROUGH THE OVERNIGHT. NORTHWEST WIND SPEEDS WILL STEADILY INCREASE THROUGH THE EVENING. * SNOW ACCUMULATION: THE INITIAL BAND WILL BRING UP TO AROUND AN INCH OF ACCUMULATION WITH AMOUNTS OF AROUND 2 INCHES POSSIBLE IN SPOTS. OTHERWISE ADDITIONAL LIGHT ACCUMULATION OF LESS THAN AN INCH IS EXPECTED BEHIND THE BAND THROUGH MID AND LATE EVENING. AN ADDITIONAL 1 TO POSSIBLY 2 INCHES OF ACCUMULATION IS POSSIBLE IF SNOW INTENSITY INCREASES LATE THIS EVENING AND OVERNIGHT. * WIND: NORTHWEST WINDS WILL STEADILY INCREASE THROUGH THE EVENING WITH GUSTS OF 50 TO 60 MPH EXPECTED TO DEVELOP. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...STRONG WINDS WILL PRODUCE BLOWING SNOW AND REDUCED VISIBILITY THROUGH THE REST OF THE EVENING...WITH LOWEST VISIBILITY OCCURRING WITH THE MORE INTENSE SNOWFALL. VISIBILITY OF A QUARTER MILE OR LESS IS POSSIBLE NEAR THE LAKE AND PORTER COUNTY INDIANA SHORELINE LATE THIS EVENING AND OVERNIGHT. WINDS WILL CONTINUE TO GUST TO 40 TO 55 MPH THROUGH DAYBREAK FRIDAY...WITH THE HIGHEST ON THE INDIANA LAKEFRONT. THIS WILL RESULT IN CONTINUED BLOWING AND DRIFTING SNOW AS THE SNOW WINDS DOWN...ESPECIALLY IN OPEN AREAS. WIND CHILL VALUES WILL PLUMMET TO THE SINGLE DIGITS BY EARLY FRIDAY MORNING. MINOR WIND DAMAGE AND SPORADIC POWER OUTAGES MAY RESULT AS WELL. A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-210600- /O.CON.KLOT.WS.W.0004.000000T0000Z-121221T0600Z/ MCHENRY- INCLUDING THE CITY OF...WOODSTOCK 729 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...LIGHT SNOW WILL CONTINUE THROUGH MID EVENING BEFORE SNOW INTENSITY INCREASES FROM MID EVENING THROUGH ABOUT MIDNIGHT. NORTHWEST WINDS WILL STEADILY INCREASE THROUGH THE EVENING. * SNOW ACCUMULATION: AN ADDITIONAL ACCUMULATION OF 1 TO PERHAPS 2 INCHES IS POSSIBLE THROUGH LATE EVENING. TOTAL SNOW AMOUNTS OF 1 TO POSSIBLY 4 INCHES ARE EXPECTED. * WIND: NORTHWEST WINDS WILL INCREASE TO 30 TO 40 MPH THIS EVENING WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED TO DEVELOP. * IMPACTS...THE STRONG WINDS WILL PRODUCE BLOWING AND DRIFTING SNOW AS WELL AS REDUCED VISIBILITY BELOW 1 MILE MAKING TRAVEL TREACHEROUS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40 MPH WILL CONTINUE THROUGH EARLY FRIDAY...RESULTING IN CONTINUED BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO NEAR ZERO BY EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ MDB
261 WWUS43 KLOT 210553 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1153 PM CST THU DEC 20 2012 ILZ003-004-008-010-011-211400- /O.CAN.KLOT.BZ.W.0002.000000T0000Z-121221T0600Z/ /O.NEW.KLOT.WW.Y.0008.121221T0553Z-121221T1600Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB 1153 PM CST THU DEC 20 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM CST FRIDAY... ...BLIZZARD WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER WEATHER ADVISORY FOR BLOWING AND DRIFTING SNOW...WHICH IS IN EFFECT UNTIL 10 AM CST FRIDAY. THE BLIZZARD WARNING HAS BEEN CANCELLED. * TIMING...WIND GUSTS OF 35 TO 45 MPH WILL PRODUCE BLOWING AND DRIFTING SNOW THROUGH MID FRIDAY MORNING WHEN THEY WILL EASE. * IMPACTS...BLOWING AND DRIFTING SNOW WILL CREATE VISIBILITY REDUCTIONS AND CAUSE HAZARDOUS ROAD CONDITIONS...ESPECIALLY ON NORTH-SOUTH ORIENTED ROADS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW AROUND. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS. && $$ ILZ019-210700- /O.CAN.KLOT.BZ.W.0002.000000T0000Z-121221T0600Z/ LA SALLE- INCLUDING THE CITY OF...OTTAWA 1153 PM CST THU DEC 20 2012 ...BLIZZARD WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS CANCELLED THE BLIZZARD WARNING. LIGHT SNOW WILL BE TAPERING OFF EARLY TONIGHT. STRONG NORTHWEST WINDS WILL CAUSE SOME ISOLATED AREAS OF BLOWING SNOW WHERE SNOW ACCUMULATION HAD OCCURRED. $$ ILZ005-210700- /O.EXP.KLOT.WS.W.0004.000000T0000Z-121221T0600Z/ MCHENRY- INCLUDING THE CITY OF...WOODSTOCK 1153 PM CST THU DEC 20 2012 ...WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT CST TONIGHT... LIGHT SNOW WILL TAPER OFF EARLY TONIGHT. SOME ISOLATED BLOWING SNOW WILL CONTINUE WHERE BETTER ACCUMULATIONS OCCURRED. $$ ILZ006-012>014-020>022-INZ001-002-210900- /O.CON.KLOT.WS.W.0004.000000T0000Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 1153 PM CST THU DEC 20 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY... * TIMING...LIGHT SNOW WILL CONTINUE ACROSS NORTHEAST ILLINOIS AND NORTHWEST INDIANA EARLY TONIGHT WITH EMBEDDED BANDS OF MORE INTENSE SNOW. SNOW WILL TAPER OFF FROM WEST TO EAST OVERNIGHT THOUGH SOME LIGHT SNOW WILL LINGER ACROSS EASTERN PORTER COUNTY INDIANA THROUGH DAYBREAK. * SNOW ACCUMULATION: ADDITIONAL ACCUMULATIONS OF AROUND AN INCH OR LESS...WITH ISOLATED HIGHER AMOUNTS POSSIBLE ACROSS PORTER COUNTY INDIANA. * WIND: NORTHWEST WIND GUSTS OF 35 TO 45 MPH WILL CONTINUE EARLY TONIGHT BEFORE EASING LATE. WINDS NEAR THE LAKE AND PORTER COUNTY SHORELINE COULD EXCEED 60 MPH AT TIMES. * IMPACTS...VISIBILITY WILL FALL TO A MILE OR LESS UNDER THE MORE INTENSE BANDS OF SNOW WITH THE STRONG WINDS CAUSING SOME BLOWING SNOW AND REDUCING VISIBILITY FURTHER. A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ MDB
931 WWUS43 KLOT 210849 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 249 AM CST FRI DEC 21 2012 ILZ006-012>014-020>022-INZ001-002-211000- /O.EXP.KLOT.WS.W.0004.000000T0000Z-121221T0900Z/ LAKE IL-KANE-DUPAGE-COOK-KENDALL-GRUNDY-WILL-LAKE IN-PORTER- INCLUDING THE CITIES OF...WAUKEGAN...AURORA...WHEATON...CHICAGO... OSWEGO...MORRIS...JOLIET...GARY...VALPARAISO 249 AM CST FRI DEC 21 2012 ...WINTER STORM WARNING WILL EXPIRE AT 3 AM CST EARLY THIS MORNING... SOME LIGHT SNOW OR FLURRIES WILL LINGER EARLY THIS MORNING BUT NO SIGNIFICANT ACCUMULATION IS EXPECTED. TEMPERATURES ARE FALLING BELOW FREEZING SO LINGERING MOISTURE ON UNTREATED AND LESSER TRAVELED ROADWAYS MAY FREEZE AND LEAD TO AREAS OF BLACK ICE. $$ ILZ003-004-008-010-011-211600- /O.CON.KLOT.WW.Y.0008.000000T0000Z-121221T1600Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB 249 AM CST FRI DEC 21 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * TIMING...AREAS OF BLOWING SNOW WILL CONTINUE THIS MORNING IN OPEN AND RURAL AREAS. * IMPACTS...BLOWING AND DRIFTING SNOW WILL CREATE VISIBILITY REDUCTIONS AND CAUSE HAZARDOUS ROAD CONDITIONS...ESPECIALLY ON NORTH-SOUTH ORIENTED ROADS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO STRONG WINDS BLOWING SNOW AROUND. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS. && $$ IZZI
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before this winter storm warning went out at Dec 19, 3:45 AM CST, 18 minutes earlier.
Area forecast discussion, Dec 19, 3:45 AM CST, 18 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
345 AM CST WED DEC 19 2012
.DISCUSSION...
344 AM CST
SHORT TERM (THROUGH THURSDAY NIGHT)...
HEADLINE SUMMARY: UPGRADING TO WINTER STORM WARNING FOR NW CWA
AND NOT EXPANDING HEADLINES ANY FARTHER EAST AT THIS TIME.
VERY LITTLE CHANGE NEEDED TO GOING FORECAST FOR THE STORM AS 00Z
GUIDANCE IS IN EXCELLENT RUN TO RUN AND MODEL TO MODEL AGREEMENT ON
THE DETAILS OF THE EVOLUTION OF THE VERY STRONG AND DYNAMIC WINTER
STORM LIKELY TO IMPACT THE REGION STARTING TONIGHT...BUT TRULY IN
ERNEST THURSDAY INTO THURSDAY NIGHT.
INTO EARLY EVENING NOT MUCH GOING ON TODAY WITH LOW CLOUD
POTENTIALLY SCATTERING OUT A BIT TODAY BUT AS THEY MID-HIGH
CLOUDINESS IS ALREADY STREAMING IN SO GENERAL CHARACTER OF TODAY
SHOULD BE GENERALLY CLOUDY AND SEASONABLE. ACTION STARTS TONIGHT AS
WARM AIR ADVECTION REALLY BEGINS TO RAMP UP INTO HIGH GEAR WITH RAIN
AND POSSIBLY EVEN AN ISOLATED THUNDERSTORM OR TWO BREAK OUT AND
OVERSPREAD THE CWA LATER THIS EVENING AND INTO THE OVERNIGHT. OVER
NORTHWESTERN 1/4TH OF THE CWA RAIN COULD START AS SNOW OR RAIN/SNOW
MIX AND EVEN A BIT OF SLEET BEFORE STRONG WARM AIR ADVECTION
OVERWHELMS THE INITIALLY COOL BOUNDARY LAYER. IN FACT...HAVE TEMPS
RISING TONIGHT IN THE GRIDS...PARTICULARLY SOUTHERN CWA.
AT LEAST PERIODIC RAIN/SHOWERS/DRIZZLE LIKELY TO CONTINUE INTO
THURSDAY MORNING...THOUGH MID LEVEL DRY INTRUSION LIKELY TO OVERTAKE
MUCH OF THE CWA PROBABLY RESULTING IN A TRANSITION TO MORE
DRIZZLE/SHOWERY CONDITIONS. SFC LOW TRACKS FROM UIN TO JOT IN THE
MORNING WHICH SHOULD DRAG WARM FRONT NORTH AND ALLOW ABOUT SE HALF
OF THE CWA TO GET INTO THE WARM SECTOR WITH TEMPS CLIMBING INTO THE
50S...AND MODELS HINTING AT SOME SURFACE BASED CAPE AS MID LEVEL
LAPSE RATES STEEPEN UP AND SFC TDS CLIMB TO NEAR 50F. GIVEN THE
PROGGED INSTABILITY THERE IS A THREAT FOR THUNDERSTORMS TO DEVELOP
IN AND NEAR THE WARM SECTOR DURING THE MORNING INTO THE EARLY
AFTERNOON.
SURFACE LOW PROGGED TO REACH GRR BY 00Z WHILE IN THE PROCESS OF
RAPIDLY DEEPENING. MID LEVEL LOW PROGGED TO CLOSE OFF IN THE BASE OF
A TROUGH THATS BECOMING NEGATIVELY TILTED WITH 500MB 12HR HEIGHT
FALLS OVER 250M INDICATIVE OF JUST HOW EXPLOSIVELY DYNAMIC OF A
SYSTEM THIS IS PROGGED TO BE. AS MID LEVEL CIRCULATION CLOSES OFF
TROWEL/DEFORMATION ZONE IS PROGGED TO WRAP/DEVELOP SOUTHWARD AROUND
THE WEST SIDE OF THE CIRCULATION THURSDAY MORNING AND THEN PROGRESS
EASTWARD ACROSS THE CWA THURS AFTERNOON AND EVENING. GIVEN THE
EXPLOSIVE INTENSIFICATION PROGGED TO TAKE PLACE THURSDAY AFTERNOON
AND EVENING WITH VERY STEEP MID LEVEL LAPSE RATES ADVECTING INTO THE
DRY INTRUSION AM QUITE CONCERNED ABOUT THE POTENTIAL FOR
THUNDERSTORMS TO DEVELOP IN THE DEFORMATION BAND THURSDAY AFTERNOON
AND EVENING.
BIGGEST CHANGE TO GOING FORECAST WAS TO SLOW THE TRANSITION FROM
RAIN TO SNOW...ESPECIALLY WESTERN COUNTIES WHERE PRECIP SHOULD START
AS ALL RAIN THURS AM. TEMPS WILL BEGIN TO CRASH FROM WEST AND
SOUTHWEST TO NORTHEAST THURS PM...WITH P-TYPE CHANGING TO SNOW
WITHIN THE DEVELOPING DEFORMATION BAND. AS THE LOW MOVES INTO LOWER
MI VERY STRONG PRESSURE RISES AND COLD AIR ADVECTION SHOULD ALLOW
EFFICIENT MIXING OF THE VERY STRONG WINDS TO THE SFC AS ATMOSPHERE
TRIES TO ADJUST TO THE RAPID DEEPENING OF THE LOW. SUSTAINED WINDS
WILL INCREASE TO OVER 30 MPH WITH GUSTS OVER 50 MPH A DARN GOOD BET
LATE THURS AFTERNOON INTO THURS EVENING.
HAVE BEEN PAINSTAKINGLY AGONIZING ABOUT WHAT TO DO WITH HEADLINES.
VERY STRONG AND BORDERLINE DAMAGING WIND POTENTIAL AND THUNDERSNOW
POTENTIAL WOULD CERTAINLY ARGUE FOR EXPANDING HEADLINES EASTWARD.
HOWEVER UNCERTAINTY ABOUT ACCUMULATIONS IS VERY HIGH AS IS HOW
BLOWABLE THE SNOW THAT FALLS WILL BE WITH TEMPS HOVERING RIGHT NEAR
FREEZING DURING MAJORITY OF THE SNOW TIME AND WITH DURATION OF SNOW
LIKELY TO BE BRIEF. GENERALLY THINKING 1-3 INCHES EAST OF THE
CURRENT WATCH...THOUGH THUNDERSNOW COULD SIGNIFICANTLY INFLATE THOSE
TOTALS. OVER NORTH CENTRAL ILLINOIS LOOKING MORE LIKE A SOLID 3-6
INCH EVENT...WITH LOCALLY HEAVIER AMOUNTS POSSIBLE ALONG WITH STRONG
WINDS. GIVEN THIS IS WINTER/WIND EVENT IS OVER 32-38 HOURS OUT AND
CONFIDENCE IS LOW IN SNOW AMOUNTS AND DRIFTABILITY OF THE SNOW AM
NOT GOING TO EXPAND CURRENT HEADLINES NOW...THOUGH WOULD EXPECT
WINTER WEATHER ADVISORY OR POSSIBLY WINTER STORM WARNING WILL NEED
TO BE EXTENDED EAST INTO THE CHGO METRO AREA LATER TODAY. AM GOING
TO UPGRADE FAR NORTHWEST CWA TO A WINTER STORM WARNING...WHILE
CONFIDENCE IS NOT HIGH SNOW AMOUNTS...DO ANTICIPATE A HIGH IMPACT
EVENT WITH BLOWING/FALLING SNOW AND IN EFFORT TO CLEAN UP W/W/A MAP
FOR ROCKFORD AREA DECIDED TO UPGRADE EVEN THOUGH ONSET OF WINTER
PRECIP IS WELL OVER 24 HOURS AWAY.
IZZI
LONG TERM (FRIDAY ONWARD)...
DEEP LOW ASSOCIATED WITH OUR WINTER STORM WILL BE DRIFTING EAST NEAR
DETROIT FRIDAY MORNING...WITH EXTENSIVE AREA OF CYCLONIC LOW LEVEL
FLOW LINGERING AS FAR WEST AS THE MISSISSIPPI RIVER VALLEY. COMBINED
WITH STRONG LOW LEVEL COLD ADVECTION...STRATOCU AND FLURRIES ARE
LIKELY TO LINGER ESPECIALLY DURING THE MORNING HOURS ACROSS THE
EASTERN CWA. LAKE EFFECT WILL RAMP UP AS DELTA-T VALUES APPROACH 15
AND INVERSION HEIGHTS APPROACH 10 KFT OVER THE WATER...THOUGH
NORTHWEST FLOW SHOULD FOCUS LAKE EFFECT SNOW SHOWERS MAINLY EAST OF
PORTER COUNTY. AS THE LARGE LOW CONTINUES TO DRIFT OFF TO THE EAST
FRIDAY NIGHT...CLOUDS SHOULD CLEAR FROM THE WEST AS HEIGHT RISES AND
DEEP SUBSIDENCE INCREASE AND HIGH PRESSURE RIDGE BUILDS INTO
ILLINOIS FROM THE WEST. AFTER HIGHS IN THE 25-30 DEGREE RANGE ACROSS
THE AREA FRIDAY...TEMPS BY SATURDAY MORNING MAY DIP TO THE SINGLE
DIGITS WEST OF CHICAGO WHERE CLEARING SKIES AND LIGHT WINDS COMBINE
WITH NEW SNOW COVER TO PRODUCE STRONG RADIATIONAL COOLING.
BROAD UPPER RIDGING DEVELOPS ACROSS THE CENTRAL CONUS BY THE WEEKEND
IN WAKE OF STORM...AND AHEAD OF ANOTHER UPPER TROUGH ALONG THE WEST
COAST...WITH DRY AND SEASONABLY COLD SLIGHTLY BELOW NORMAL WEATHER
THROUGH SATURDAY AND SUNDAY. GENERALLY LOW CONFIDENCE IN FORECAST
FOR DAYS 6-7 AT THIS TIME WITH ONLY MODEST MODEL VS MODEL
CONSISTENCY. GUIDANCE GENERALLY DEPICTS A PROGRESSIVE PATTERN INTO
MONDAY/CHRISTMAS EVE WITH A SHORT WAVE MOVING THOUGH THE
MIDWEST...THOUGH THERE IS CONSIDERABLE DIFFERENCES WITH HOW
AMPLIFIED IT BECOMES. PREFER THE RELIABLE ECMWF DEPICTION OF A
FLATTER/FASTER WAVE WHICH TAKES AN AREA OF LOW PRESSURE THROUGH THE
OHIO VALLEY ON MONDAY...PERHAPS SPREADING SOME LIGHT RAIN OR
RAIN/SNOW AS FAR NORTH AS OUR SOUTHERN COUNTIES OF THE CWA.
ECMWF/GFS IN BASIC AGREEMENT IN BUCKLING FLOW A BIT WITH MORE
AMPLIFIED TROUGH TUESDAY...WHICH WOULD SUPPORT AT LEAST LOW
PROBABILITY POTENTIAL FOR SOME LIGHT RAIN/SNOW ACROSS THE REGION
CHRISTMAS DAY/NIGHT.
RATZER
&&
.AVIATION...
//ORD AND MDW CONCERNS...UPDATED 09Z...
* LOW MVFR/IFR CIGS THROUGH MID MORNING.
* MVFR VIS WITH LIGHT FOG THROUGH MID MORNING.
* INCREASING EASTERLY WINDS THIS EVENING INTO THURSDAY MORNING
WITH GUSTS IN THE MID 20KT RANGE.
* RAIN DEVELOPING EARLY THURSDAY MORNING. CMS
//DISCUSSION...UPDATED 09Z...
CIGS ARE GENERALLY LOW MVFR ACROSS NORTHERN IL...STILL SOME IFR
ACROSS NORTHWEST IL/RFD AREA. EXPECT CIGS TO REMAIN GENERALLY
AROUND 1KFT/LOW MVFR BUT IFR IS STILL POSSIBLE. WHILE CLOUDS HAVE
SCATTERED AT ORD...THINK THAT WILL BE BRIEF AND IF BKN/OVC CIGS
CONTINUE THROUGH SUNRISE...FOG POTENTIAL SHOULD BE MINIMAL. CMS
PREVIOUS 06Z DISCUSSION...
SEVERAL FORECAST CONCERNS THIS MORNING STARTING WITH CIGS. LOW END
MVFR CIGS ACROSS ORD/MDW TREND BACK INTO IFR/LIFR ACROSS NORTHWEST
IL AND SOUTHERN WI. OVERALL CONFIDENCE WITH CIG TRENDS OVERNIGHT
IS FAIRLY LOW. NOT SURE HOW FAR SOUTHEAST IFR CIGS WILL MOVE
BEFORE CIGS MAY LIFT BACK INTO LOW END MVFR. OPTED TO KEEP MDW/GYY
MVFR BUT IFR ELSEWHERE AND WILL NEED TO MONITOR TRENDS THROUGH THE
NIGHT. SCATTERING OF THE LOWER CLOUDS MID/LATE MORNING IS ALSO
UNCERTAIN BUT BY THAT TIME EXPECT CIGS WILL BE LOW MVFR OR HIGHER.
LIGHT FOG WITH VIS 3-5SM POSSIBLE THROUGH MORNING BUT IF LOWER
CLOUDS BEGIN TO SCATTER OUT...POCKETS OF 1-3SM VIS ARE POSSIBLE.
LOW PRESSURE OVER NORTHERN INDIANA WILL CONTINUE TO MOVE EAST
OVERNIGHT WITH THE GRADIENT SLOWLY RELAXING. STILL A FEW GUSTS
SHOWING UP ON ONE MINUTE DATA AT ORD/MDW BUT OVERALL TREND SHOULD
BE FOR GUSTS TO DIMINISH IN THE NEXT HR OR SO WITH WINDS SLOWLY
DIMINISHING BY MORNING AND BECOMING LIGHT AND VRB. WINDS WILL THEN
TURN LIGHT EAST/SOUTHEAST MIDDAY AND STEADILY INCREASE INTO THE
EVENING WITH GUSTS 20-25KTS DEVELOPING WEDNESDAY EVENING AND
CONTINUING INTO THURSDAY MORNING AS THE GRADIENT INCREASES AHEAD
OF THE APPROACHING WINTER STORM.
ONSET OF PRECIP WEDNESDAY EVENING INTO EARLY THURSDAY MORNING A
LITTLE UNCERTAIN AS LOW LEVELS REMAIN FAIRLY DRY. AS PRECIP
BEGINS...COULD BE A SHORT PERIOD OF A SLEET MIX BUT EXPECT
PREVAILING PRECIP TO BE ALL RAIN. CIGS SHOULD RAPIDLY LOWER
THROUGH MVFR ONCE PRECIP BEGINS WITH IFR/LIFR POSSIBLE BY 12Z...
THE END OF THE 30 HR ORD TAF. CMS
//ORD AND MDW CONFIDENCE...UPDATED 09Z...
* MEDIUM CONFIDENCE REGARDING CIG/VIS TRENDS INTO THIS MORNING.
* MEDIUM CONFIDENCE REGARDING WIND DIRECTION/SPEEDS/GUSTS THROUGH
THE PERIOD.
* MEDIUM CONFIDENCE REGARDING RAIN ARRIVAL THURSDAY MORNING...LOW
CONFIDENCE ON TIMING/LOWER CIGS/VIS. CMS
//OUTLOOK FOR ORD/MDW FOR 12Z THURSDAY-12Z TUESDAY...UPDATED 00Z...
* THURSDAY...RAIN CHANGING TO SNOW IN THE AFTERNOON. IFR/LIFR
LIKELY. BECOMING VERY WINDY WITH GUSTS 35+ KTS IN THE
AFTERNOON.
* THURSDAY NIGHT...VERY WINDY WITH GUSTS 35+ KT IN THE EVENING.
SNOW ENDING OVERNIGHT. BLOWING SNOW. LIFR IMPROVING TO MVFR OR
VFR LATE.
* FRIDAY...GUSTY NORTHWEST WINDS. VFR.
* SATURDAY THROUGH MONDAY...VFR.
KJB
&&
.MARINE...
350 PM...HAVE UPGRADED GALE/STORM WATCH TO WARNINGS FOR THURSDAY
THROUGH FRIDAY...WITH A PERIOD OF SMALL CRAFT ADVISORY CONDITIONS
FOR THE NEARSHORE WATERS PRECEDING THE GALES.
CONDITIONS SHOULD START OUT QUIET OVER THE LAKE TONIGHT AND
WEDNESDAY AS A WEAK LOW PASSES ACROSS THE SOUTHERN TIP OF THE LAKE
TONIGHT AND WEAK HIGH PRESSURE BUILDS ACROSS THE LAKE WEDNESDAY
INTO WEDNESDAY EVENING.
A LOW PRESSURE SYSTEM EXPECTED TO DEVELOP IN THE LEE OF THE
CENTRAL ROCKIES BY MID-DAY WEDNESDAY SHOULD RAPIDLY DEEPEN AS IT
TRACKS EWD THROUGH THE PLAINS WEDNESDAY NIGHT AND THEN PASSES JUST
SOUTH OF CHICAGO BY MID-DAY THURSDAY. THE GRADIENT WILL STRENGTHEN
QUICKLY OVER THE LAKE WITH WINDS INCREASING TO EAST
GALES...INITIALLY OVER THE SOUTHERN PORTIONS OF THE LAKE EARLY
THURSDAY MORNING AND THEN SPREADING NORTHWARD THROUGH THE DAY. THE
LOW WILL CONTINUE TO DEEPEN SLIGHTLY AS IT PASSES EAST OF THE LAKE
THURSDAY NIGHT...DRAWING MUCH COOLER AIR SOUTHWARD AS WINDS TURN
NORTHERLY. WITH THE DEEPENING LOW...COMBINED WITH STRONG COLD
ADVECTION DEVELOPING ON THE WESTERN PERIPHERY OF THE LOW...WINDS
SHOULD INCREASE FURTHER TO STORM FORCE WINDS OF 50-55 KT. AS THE
LOW SLOWLY PULLS OFF TO THE EAST...AND HIGH PRESSURE SLOWLY BUILDS
ACROSS THE PLAINS...THERE IS THE POTENTIAL FOR THE STORM FORCE
WINDS TO CONTINUE THROUGH MUCH OF THE DAY FRIDAY. WINDS SHOULD
DIMINISH QUICKLY LATE FRIDAY NIGHT AND SATURDAY AS THE RIDGE OF
HIGH PRESSURE BUILDS ACROSS THE LAKE.
KREIN
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...WINTER STORM WARNING...ILZ003-ILZ004-ILZ008-ILZ010...9 AM
THURSDAY TO MIDNIGHT FRIDAY.
WINTER STORM WATCH...ILZ005-ILZ011...NOON THURSDAY TO MIDNIGHT
FRIDAY.
IN...NONE.
LM...GALE WARNING...LMZ080-LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ740-
LMZ741-LMZ742-LMZ743-LMZ744-LMZ745-LMZ777-LMZ779-LMZ868-
LMZ870-LMZ872-LMZ874-LMZ876-LMZ878...3 AM THURSDAY TO 1 PM
THURSDAY.
STORM WARNING...LMZ080-LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ740-
LMZ741-LMZ742-LMZ743-LMZ744-LMZ745-LMZ777-LMZ779-LMZ868-
LMZ870-LMZ872-LMZ874-LMZ876-LMZ878...1 PM THURSDAY TO 4 PM
FRIDAY.
GALE WARNING...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565...8 AM
THURSDAY TO 6 PM THURSDAY.
STORM WARNING...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565...6 PM
THURSDAY TO 4 PM FRIDAY.
SMALL CRAFT ADVISORY...LMZ740-LMZ741-LMZ742-LMZ743-LMZ744-
LMZ745...8 PM WEDNESDAY TO 3 AM THURSDAY.
&&Hazardous weather outlook, Dec 18, 4:00 PM CST, 12 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 400 PM CST TUE DEC 18 2012 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 192200- WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 400 PM CST TUE DEC 18 2012 /500 PM EST TUE DEC 18 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT INTO THURSDAY. A POTENT STORM SYSTEM WILL AFFECT THE REGION THURSDAY INTO THURSDAY NIGHT BRINGING WET SNOW AND VERY STRONG WINDS. RAIN WILL CHANGE TO A WET SNOW THURSDAY AND COULD CONTINUE INTO THURSDAY EVENING. SNOW COULD FALL HEAVILY AT TIMES WITH ACCUMULATIONS EXPECTED...ESPECIALLY NORTH OF INTERSTATE 80. IN ADDITION...VERY STRONG WINDS COULD GUST TO OVER 50 MPH AT TIMES VERY LATE THURSDAY AFTERNOON INTO THURSDAY EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-192200- WINTHROP HARBOR TO WILMETTE HARBOR- WILMETTE HARBOR TO NORTHERLY ISLAND- NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY- GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY- 400 PM CST TUE DEC 18 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT INTO THURSDAY. STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT WEDNESDAY NIGHT INTO THURSDAY. WINDS WILL LIKELY INCREASE TO STORM FORCE LATE THURSDAY INTO THURSDAY NIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-192200- LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NM OFFSHORE- LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI- LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO MID LAKE- 400 PM CST TUE DEC 18 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEDNESDAY NIGHT INTO THURSDAY MAINLY FOR THE SOUTHERN PORTION OF THE LAKE. GALE FORCE WINDS WILL DEVELOP THURSDAY AND THEN INCREASE TO STORM FORCE THURSDAY EVENING INTO FRIDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO IZZI
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 19, 3:56 PM CST | High Wind Watch | LOT | Ford, Iroquois, Kankakee, Livingston | 12 hr |
Nearby
Winter Storm Warnings in Illinois, 2012Winter Storm Warnings in Indiana, 2012Every winter storm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.