Alert archive / Illinois / Winter Storm Warnings in 2012
Winter Storm Warning 1, NWS Chicago, IL
NWS Chicago, IL issued this winter storm warning at Jan 12, 2012, 3:32 AM CST for 5 counties in Illinois; Lake County, Porter County, Indiana. It took effect at Jan 12, 2012, 10:45 AM CST. It was in force for 22 hr. 60 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
- Jan 12, 2012, 3:32 AM CST (09:32 UTC)
- In effect from
- Jan 12, 2012, 10:45 AM CST
- Expired
- Jan 13, 2012, 9:00 AM CST
- In force
- 22 hr
- Issued by
- NWS Chicago, IL
Counties DuPage County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, McHenry County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 31 km from the middle of the area, began a volume at 09:29 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 |
|---|---|---|---|
| Jan 12, 11:30 AM CST | SNOW 1.5 | Wsw Batavia, IL | SNOWFALL BEGAN 730 THIS MORNING. |
| Jan 12, 12:00 PM CST | SNOW 1 | Lincolnshire, IL | |
| Jan 12, 12:00 PM CST | SNOW 1 | Woodstock, IL | |
| Jan 12, 12:00 PM CST | SNOW 1.2 | Crystal Lake, IL | |
| Jan 12, 12:00 PM CST | SNOW 1.5 | Montgomery, IL | |
| Jan 12, 12:00 PM CST | SNOW 2.1 | Downers Grove, IL | |
| Jan 12, 12:10 PM CST | SNOW 1.6 | Carol Stream, IL | |
| Jan 12, 12:20 PM CST | SNOW 1.4 | St. Charles, IL | WATER EQ 0.13 |
| Jan 12, 12:30 PM CST | SNOW 1.4 | Bartlett, IL | SNOW TOTAL SO FAR. |
| Jan 12, 1:00 PM CST | SNOW 1.2 | E Harvard, IL | SNOW BEGAN ABOUT 8 AM. |
| Jan 12, 1:00 PM CST | SNOW 1.7 | Montgomery, IL | SNOWFALL OVER THE PAST 5 HOURS. SNOW DEPTH 2 INCHES. |
| Jan 12, 1:30 PM CST | SNOW 1 | Carpentersville, IL | ABOUT 1/2 INCH PER HOUR SNOWFALL RATE IN DUNDEE TOWNSHIP AT TIME OF REPORT. |
| Jan 12, 1:46 PM CST | SNOW 1.5 | Naperville, IL | SNOWFALL LAST 5 HOURS. |
| Jan 12, 2:06 PM CST | SNOW 0.7 | Valparaiso, IN | |
| Jan 12, 2:09 PM CST | SNOW 3.1 | Elburn, IL | SNOW TOTAL SO FAR. |
| Jan 12, 2:15 PM CST | SNOW 1.5 | Schererville, IN | SNOWFALL LAST 4 HOURS. LIGHT TO MODERATE SNOW CONTINUES. BOTH SIDE AND MAIN ROADS ARE BECOMING SNOW-COVERED AND ICY. |
| Jan 12, 2:20 PM CST | SNOW 1.5 | Fox Lake, IL | SNOW TOTAL SO FAR. |
| Jan 12, 2:30 PM CST | SNOW 3.1 | Geneva, IL | SNOW TOTAL SO FAR. LIGHT TO MODERATE SNOWFALL AT TIME OF REPORT. |
| Jan 12, 2:30 PM CST | SNOW 3.1 | N Geneva, IL | MODERATE SNOW CURRENTLY FALLING. SLIGHT INCREASE IN INTENSITY HAS BEEN OBSERVED IN THE LAST HOUR. |
| Jan 12, 2:40 PM CST | SNOW 2.9 | Batavia, IL | STORM TOTAL SO FAR. |
| Jan 12, 2:44 PM CST | SNOW 2 | Lake Zurich, IL | SNOW CONTINUES TO FALL AT A LIGHT TO MODERATE RATE. ROADS ARE BECOMING SLUSHY AND SNOW COVERED. AN ESTIMATED 2 TO 3 INCHES HAVE FALLEN SINCE THIS MORNING. |
| Jan 12, 2:53 PM CST | SNOW 1.7 | Island Lake, IL | LIGHT SNOW. MODERATE WINDS. 33 DEGREES. |
| Jan 12, 2:57 PM CST | SNOW 1.3 | Elmhurst, IL | NEW SNOWFALL OVER THE PAST 3 HOURS. |
| Jan 12, 3:00 PM CST | SNOW 1.5 | 1 W Beach Park, IL | LIGHT RAIN AND MIST AT 9 AM. CHANGED OVER TO SNOW AT 1115 AM. HEAVY WET SNOW ACCUMULATING ON ALL SURFACES. |
| Jan 12, 3:10 PM CST | SNOW 1.5 | Waukegan, IL | STORM TOTAL SO FAR FROM NEAR CHICAGO/WAUKEGAN REGIONAL AIRPORT. SNOW RATE INCREASING AT TIME OF REPORT. |
| Jan 12, 3:15 PM CST | SNOW 0.4 | 5 Ssw Valparaiso, IN | STORM TOTAL SO FAR. |
| Jan 12, 3:20 PM CST | SNOW 2.5 | Wsw Batavia, IL | |
| Jan 12, 3:25 PM CST | SNOW 2 | N Huntley, IL | SNOWING SINCE 845 AM. MODERATE SNOW AND WINDY CURRENTLY. |
| Jan 12, 3:30 PM CST | SNOW 2.4 | Harvard, IL | LIGHTER SNOW. AVERAGE SNOWFALL 2.4 INCHES. DRIFTS ABOUT 4 INCHES. |
| Jan 12, 3:33 PM CST | SNOW 1.8 | Gurnee, IL | STORM TOTAL SO FAR. |
| Jan 12, 3:35 PM CST | SNOW 1.5 | 4 Se Aurora, IL | STORM TOTAL SO FAR. LIGHT SNOW FALLING...SOME DRIFTING STARTING TO OCCUR. |
| Jan 12, 4:05 PM CST | SNOW 3.2 | Naperville, IL | STORM TOTAL SO FAR. LIGHT SNOW FALLING. |
| Jan 12, 4:30 PM CST | SNOW 2.2 | Waukegan, IL | STORM TOTAL SO FAR NEAR CHICAGO/WAUKEGAN REGIONAL AIRPORT. SNOW HAS BECOME FLUFFIER THAN EARLIER. |
| Jan 12, 4:50 PM CST | SNOW 2.4 | Fox Lake, IL | |
| Jan 12, 5:10 PM CST | SNOW 3 | Crystal Lake, IL | |
| Jan 12, 5:10 PM CST | SNOW 3.4 | Downers Grove, IL | |
| Jan 12, 5:15 PM CST | SNOW 2.4 | 2 Wsw Elk Grove Village, IL | STORM TOTAL SO FAR. 0.6 INCHES SINCE 315 PM. LIGHT SNOW AT TIME OF REPORT...WITH MINOR BLOWING AND DRIFTING. |
| Jan 12, 5:25 PM CST | SNOW 2.6 | Waukegan, IL | STORM TOTAL SO FAR. MODERATE SNOW AT REPORT TIME. |
| Jan 12, 5:30 PM CST | SNOW 2.5 | 4 Se Aurora, IL | STORM TOTAL SO FAR. |
| Jan 12, 5:30 PM CST | SNOW 3.3 | 1 Wsw Batavia, IL | STORM TOTAL SO FAR. LIGHT TO MODERATE SNOW AT TIME OF OBSERVATION. |
| Jan 12, 5:35 PM CST | SNOW 5.2 | Yorkville, IL | |
| Jan 12, 6:00 PM CST | SNOW 3 | Mchenry, IL | 3 INCHES ON THE GROUND |
| Jan 12, 6:05 PM CST | SNOW 4.7 | Elburn, IL | LATEST STORM TOTAL AS OF 6 PM. |
| Jan 12, 6:30 PM CST | SNOW 3 | Lombard, IL | 3 INCHES ON THE GROUND |
| Jan 12, 6:40 PM CST | SNOW 1.5 | Valparaiso, IN | STORM TOTAL SO FAR. STILL SNOWING. |
| Jan 12, 6:40 PM CST | SNOW 1.5 | Valparaiso, IN | ESTIMATED STORM TOTAL SO FAR AT VALPARAISO UNIVERSITY. STILL SNOWING. |
| Jan 12, 7:00 PM CST | SNOW 3 | 1 Nw Naperville, IL | |
| Jan 12, 7:00 PM CST | SNOW 4.9 | 3 Wnw Bull Valley, IL | STORM TOTAL SO FAR. STILL SNOWING AND WIND IS INCREASING...LEADING TO BLOWING SNOW. |
| Jan 12, 7:30 PM CST | SNOW 5.5 | Roselle, IL | STORM TOTAL SO FAR. |
| Jan 12, 7:57 PM CST | SNOW 4.2 | Naperville, IL | STORM TOTAL SO FAR IN SOUTHEAST NAPERVILE. LIGHT SNOW FALLING AT OBSERVATION. 1 INCH FELL SINCE 500 PM. |
| Jan 12, 8:00 PM CST | SNOW 3 | 2 Ne Gurnee, IL | STORM TOTAL SO FAR. STILL SNOWING. |
| Jan 12, 8:00 PM CST | SNOW 3.5 | Wadsworth, IL | STORM TOTAL SO FAR. |
| Jan 12, 8:00 PM CST | SNOW 3.6 | Oak Brook, IL | STORM TOTAL SO FAR. |
| Jan 12, 8:05 PM CST | SNOW 3 | Highland, IN | STORM TOTAL SO FAR. 0.5 INCHES FROM 5PM TO 805PM. |
| Jan 12, 8:15 PM CST | SNOW 2.5 | 2 Wsw Elk Grove Village, IL | STORM TOTAL SO FAR. LIGHT SNOW AT TIME OF REPORT...WITH BLOWING AND DRIFTING OF SNOW ON GROUND. |
| Jan 12, 8:15 PM CST | SNOW 4.8 | Batavia, IL | STORM TOTAL SO FAR. |
| Jan 12, 8:15 PM CST | SNOW 5 | Woodstock, IL | STORM TOTAL SO FAR. |
| Jan 12, 8:15 PM CST | SNOW 6 | Nw Elburn, IL | STORM TOTAL SO FAR. MODERATE SNOW AT TIME OF REPORT...WITH SOME BLOWING AND DRIFTING. |
| Jan 12, 8:30 PM CST | SNOW 3.7 | Fox Lake, IL | STORM TOTAL SO FAR. |
| Jan 12, 8:30 PM CST | SNOW 6.1 | 3 Wnw Bull Valley, IL | STORM TOTAL SO FAR. SIGNIFICANT BLOWING AND DRIFTING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 9.5 hours before the alert went out and 198 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
- 1006 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
709 WWUS43 KLOT 120932 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 332 AM CST THU JAN 12 2012 ...SNOW AND STRONG WINDS TO DEVELOP TODAY LINGERING INTO TONIGHT... INZ002-121745- /O.UPG.KLOT.WW.Y.0001.120112T1500Z-120113T1500Z/ /O.NEW.KLOT.WS.W.0001.120112T1700Z-120113T1500Z/ PORTER- INCLUDING THE CITY OF...VALPARAISO 332 AM CST THU JAN 12 2012 ...WINTER STORM WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 AM CST FRIDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW AS WELL AS BLOWING AND DRIFTING SNOW...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 9 AM CST FRIDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP BETWEEN 10 AM AND 1 PM TODAY AND CONTINUE INTO FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY...EXCEPT IN NORTHEAST PORTIONS OF THE COUNTY WHERE TOTALS OF 6 TO 10 INCHES ARE EXPECTED. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH THIS AFTERNOON WITH GUSTS UP TO 35 MPH. THESE WINDS WILL LAST INTO FRIDAY MORNING RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO NEAR ZERO BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL DIFFICULT BY THIS AFTERNOON...WITH TRAVEL CONDITIONS POSSIBLY BECOMING TREACHEROUS AND EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING. 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. && $$ ILZ003-004-008-010-011-019-021-032-121745- /O.CON.KLOT.WW.Y.0001.120112T1200Z-120113T1000Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE-GRUNDY-LIVINGSTON- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA...MORRIS...PONTIAC 332 AM CST THU JAN 12 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY. * TIMING...SNOW WILL BEGIN EARLY THIS MORNING AND CONTINUE THROUGH MUCH OF TONIGHT. * ACCUMULATIONS...SNOWFALL TOTALS BETWEEN 4 AND 8 INCHES ARE LIKELY...WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH ARE EXPECTED THROUGH TONIGHT RESULTING IN BLOWING AND DRIFTING SNOW. WIND CHILLS ARE ALSO FORECAST TO BE ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DETERIORATING TRAVEL CONDITIONS THIS MORNING...WITH TRAVEL BECOMING MORE IMPACTED AND LIKELY TREACHEROUS BY THIS AFTERNOON INTO TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ ILZ005-006-012>014-020-022-023-033-039-INZ001-010-011-019-121745- /O.CON.KLOT.WW.Y.0001.120112T1500Z-120113T1500Z/ MCHENRY-LAKE IL-KANE-DUPAGE-COOK-KENDALL-WILL-KANKAKEE-IROQUOIS- FORD-LAKE IN-NEWTON-JASPER-BENTON- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN...AURORA... WHEATON...CHICAGO...OSWEGO...JOLIET...KANKAKEE...WATSEKA... PAXTON...GARY...MOROCCO...RENSSELAER...FOWLER 332 AM CST THU JAN 12 2012 /432 AM EST THU JAN 12 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 AM CST /10 AM EST/ THIS MORNING TO 9 AM CST /10 AM EST/ FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 AM CST /10 AM EST/ THIS MORNING TO 9 AM CST /10 AM EST/ FRIDAY. * TIMING...SNOW WILL BEGIN BETWEEN 9 AM AND NOON AND CONTINUE INTO FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY WITH LOCALLY HEAVIER TOTALS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH WITH GUSTS UP TO 35 MPH BY AFTERNOON RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL DIFFICULT FOR THE AFTERNOON COMMUTE TODAY...WITH TRAVEL CONDITIONS BECOMING TREACHEROUS AND EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ IZZI
5 follow-up statements
956 WWUS43 KLOT 121645 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1045 AM CST THU JAN 12 2012 ...SNOW AND STRONG WINDS TO DEVELOP TODAY LINGERING INTO TONIGHT... ILZ005-006-012>014-020-022-INZ001-130045- /O.UPG.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ /O.EXB.KLOT.WS.W.0001.120112T1645Z-120113T1500Z/ MCHENRY-LAKE IL-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN...AURORA... WHEATON...CHICAGO...OSWEGO...JOLIET...GARY 1045 AM CST THU JAN 12 2012 ...WINTER STORM WARNING IN EFFECT UNTIL 9 AM CST FRIDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR MODERATE TO HEAVY SNOW AND BLOWING SNOW...WHICH IS IN EFFECT UNTIL 9 AM CST FRIDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT FOR THESE AREAS. * TIMING...SNOW WILL CONTINUE INTO EARLY FRIDAY MORNING WITH THE HEAVIEST FALLING THIS AFTERNOON AND EARLY THIS EVENING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY ACROSS THE AREA BY EARLY TONIGHT. ISOLATED HIGHER AMOUNTS ARE POSSIBLE...ESPECIALLY NEAR LAKE MICHIGAN. SNOWFALL ACCUMULATION OF AROUND 1 INCH PER HOUR IS POSSIBLE FROM MID AFTERNOON INTO EARLY EVENING. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH WITH GUSTS UP TO 35 MPH LATE THIS AFTERNOON RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL TREACHEROUS FOR THE AFTERNOON COMMUTE TODAY...WITH TRAVEL CONDITIONS REMAINING DANGEROUS AND TREACHEROUS TONIGHT INTO EARLY FRIDAY MORNING...ESPECIALLY IN OPEN AREAS. HEAVY SNOWFALL RATES OF AROUND 1 INCH PER HOUR MAY MAKE IT DIFFICULT FOR SNOW REMOVAL OPERATIONS TO KEEP UP IN SOME AREAS LATE THIS AFTERNOON AND EARLY THIS EVENING. 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. && $$ INZ002-130045- /O.CON.KLOT.WS.W.0001.120112T1700Z-120113T1500Z/ PORTER- INCLUDING THE CITY OF...VALPARAISO 1045 AM CST THU JAN 12 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE TODAY INTO FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY... EXCEPT IN NORTHEAST PORTIONS OF THE COUNTY WHERE TOTALS OF 6 TO 10 INCHES ARE EXPECTED. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH THIS AFTERNOON WITH GUSTS UP TO 35 MPH. THESE WINDS WILL LAST INTO FRIDAY MORNING RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO NEAR ZERO BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL DIFFICULT BY THIS AFTERNOON...WITH TRAVEL CONDITIONS POSSIBLY BECOMING TREACHEROUS AND EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING. 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. && $$ ILZ003-004-008-010-011-019-021-032-130045- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1000Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE-GRUNDY-LIVINGSTON- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA...MORRIS...PONTIAC 1045 AM CST THU JAN 12 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE THROUGH MUCH OF TONIGHT. * ACCUMULATIONS...SNOWFALL TOTALS BETWEEN 4 AND 8 INCHES ARE LIKELY...WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH ARE EXPECTED THROUGH TONIGHT RESULTING IN BLOWING AND DRIFTING SNOW. WIND CHILLS ARE ALSO FORECAST TO BE ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DETERIORATING TRAVEL CONDITIONS THIS MORNING...WITH TRAVEL BECOMING MORE IMPACTED AND LIKELY TREACHEROUS BY THIS AFTERNOON INTO TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ ILZ023-033-039-INZ010-011-019-130045- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ KANKAKEE-IROQUOIS-FORD-NEWTON-JASPER-BENTON- INCLUDING THE CITIES OF...KANKAKEE...WATSEKA...PAXTON...MOROCCO... RENSSELAER...FOWLER 1045 AM CST THU JAN 12 2012 /1145 AM EST THU JAN 12 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ FRIDAY. * TIMING...SNOW WILL CONTINUE INTO FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY WITH LOCALLY HEAVIER TOTALS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH WITH GUSTS UP TO 35 MPH BY AFTERNOON RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL DIFFICULT FOR THE AFTERNOON COMMUTE TODAY... WITH TRAVEL CONDITIONS BECOMING TREACHEROUS AND EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ MDB
257 WWUS43 KLOT 122138 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 338 PM CST THU JAN 12 2012 ...SNOW AND STRONG WINDS TO DEVELOP TODAY LINGERING INTO TONIGHT... INZ002-130545- /O.CON.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ PORTER- INCLUDING THE CITY OF...VALPARAISO 338 PM CST THU JAN 12 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE TODAY INTO FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY... EXCEPT IN NORTHEAST PORTIONS OF THE COUNTY WHERE TOTALS OF 6 TO 10 INCHES ARE EXPECTED. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH EARLY THIS EVENING WITH GUSTS UP TO 35 MPH. THESE WINDS WILL LAST INTO FRIDAY MORNING RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO NEAR ZERO BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES FROM BLOWING SNOW WILL LIKELY MAKE TRAVEL DIFFICULT TO EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-006-012>014-020-022-INZ001-130545- /O.CON.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ MCHENRY-LAKE IL-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN...AURORA... WHEATON...CHICAGO...OSWEGO...JOLIET...GARY 338 PM CST THU JAN 12 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE INTO EARLY FRIDAY MORNING WITH THE HEAVIEST OF SNOW FALLING THROUGH THE EVENING HOURS. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY. ISOLATED HIGHER AMOUNTS ARE POSSIBLE...ESPECIALLY NEAR LAKE MICHIGAN. SNOWFALL ACCUMULATION RATES OF AROUND 1/2 TO 1 INCH PER HOUR ARE POSSIBLE THROUGH THE EVENING. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH WITH GUSTS UP TO 35 MPH EARLY THIS EVENING RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL TREACHEROUS TONIGHT INTO EARLY FRIDAY MORNING...ESPECIALLY IN OPEN AREAS. HEAVY SNOWFALL RATES MAY MAKE IT DIFFICULT FOR SNOW REMOVAL OPERATIONS TO KEEP UP IN SOME AREAS THROUGH THE EVENING. 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. && $$ ILZ003-004-008-010-011-019-021-032-130545- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1000Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE-GRUNDY-LIVINGSTON- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA...MORRIS...PONTIAC 338 PM CST THU JAN 12 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE INTO TONIGHT...WITH THE HEAVIEST FALLING INTO THE EARLY EVENING HOURS. * ACCUMULATIONS...SNOWFALL TOTALS BETWEEN 4 AND 8 INCHES ARE LIKELY...WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH ARE EXPECTED THROUGH TONIGHT RESULTING IN BLOWING AND DRIFTING SNOW. WIND CHILLS ARE ALSO FORECAST TO BE ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DIFFICULT TRAVEL CONDITIONS INTO THE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ ILZ023-033-039-INZ010-011-019-130545- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ KANKAKEE-IROQUOIS-FORD-NEWTON-JASPER-BENTON- INCLUDING THE CITIES OF...KANKAKEE...WATSEKA...PAXTON...MOROCCO... RENSSELAER...FOWLER 338 PM CST THU JAN 12 2012 /438 PM EST THU JAN 12 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ FRIDAY. * TIMING...SNOW WILL CONTINUE INTO EARLY FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY WITH LOCALLY HEAVIER TOTALS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 15 TO 25 MPH WITH GUSTS UP TO 35 MPH BY THIS EVENING RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DIFFICULT TRAVEL CONDITIONS INTO THE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ SHEA
955 WWUS43 KLOT 130309 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 909 PM CST THU JAN 12 2012 ...SNOWFALL CONTINUING INTO EARLY OVERNIGHT BEFORE DECREASING IN INTENSITY... INZ002-131115- /O.CON.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ PORTER- INCLUDING THE CITY OF...VALPARAISO 909 PM CST THU JAN 12 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE THROUGH OVERNIGHT AND GRADUALLY TAPER FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY... EXCEPT IN SCATTERED PORTIONS OF THE COUNTY WHERE TOTALS OF 6 TO 10 INCHES ARE EXPECTED. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WEST TO NORTHWEST WINDS WILL CONTINUE AT 15 TO 25 MPH...WITH GUSTS INCREASING UP TO 35 MPH. THESE WINDS WILL LAST INTO FRIDAY MORNING RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO JUST BELOW ZERO BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES FROM BLOWING SNOW WILL LIKELY MAKE TRAVEL DIFFICULT TO EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ005-006-012>014-020-022-INZ001-131115- /O.CON.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ MCHENRY-LAKE IL-KANE-DUPAGE-COOK-KENDALL-WILL-LAKE IN- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN...AURORA... WHEATON...CHICAGO...OSWEGO...JOLIET...GARY 909 PM CST THU JAN 12 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE INTO EARLY FRIDAY MORNING WITH THE HEAVIEST OF SNOW FALLING THROUGH EARLY OVERNIGHT. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY. ISOLATED HIGHER AMOUNTS ARE POSSIBLE...ESPECIALLY NEAR LAKE MICHIGAN. SNOWFALL ACCUMULATION RATES OF AROUND 1/2 TO 1 INCH PER HOUR ARE POSSIBLE THROUGH THE EVENING. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WEST TO NORTHWEST WINDS WILL CONTINUE AT 15 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL TREACHEROUS TONIGHT INTO EARLY FRIDAY MORNING...ESPECIALLY IN OPEN AREAS. HEAVIER SNOWFALL RATES AT TIMES PRIOR TO MIDNIGHT MAY MAKE IT DIFFICULT FOR SNOW REMOVAL OPERATIONS TO KEEP UP IN SOME AREAS. 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. && $$ ILZ003-004-008-010-011-019-021-032-131000- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1000Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE-GRUNDY-LIVINGSTON- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA...MORRIS...PONTIAC 909 PM CST THU JAN 12 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST FRIDAY. * TIMING...SNOW WILL CONTINUE INTO TONIGHT...WITH THE HEAVIEST FALLING INTO THE EARLY EVENING HOURS. * ACCUMULATIONS...SNOWFALL TOTALS BETWEEN 4 AND 7 INCHES ARE LIKELY...WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...NORTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL CONTINUE THROUGH EARLY FRIDAY MORNING...RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AREAS. WIND CHILLS ARE ALSO FORECAST TO BE ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DIFFICULT TRAVEL CONDITIONS INTO THE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ ILZ023-033-039-INZ010-011-019-131115- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ KANKAKEE-IROQUOIS-FORD-NEWTON-JASPER-BENTON- INCLUDING THE CITIES OF...KANKAKEE...WATSEKA...PAXTON...MOROCCO... RENSSELAER...FOWLER 909 PM CST THU JAN 12 2012 /1009 PM EST THU JAN 12 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ FRIDAY. * TIMING...SNOW WILL CONTINUE INTO EARLY FRIDAY MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 7 INCHES ARE LIKELY WITH LOCALLY HEAVIER TOTALS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...NORTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL CONTINUE TO RESULT IN BLOWING AND DRIFTING SNOW THROUGH EARLY FRIDAY MORNING...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO ZERO TO 10 BELOW BY FRIDAY MORNING. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DIFFICULT TRAVEL CONDITIONS INTO THE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ MTF
664 WWUS43 KLOT 130847 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 247 AM CST FRI JAN 13 2012 ILZ005-006-012>014-020-022-131000- /O.CAN.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ MCHENRY-LAKE IL-KANE-DUPAGE-COOK-KENDALL-WILL- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN...AURORA... WHEATON...CHICAGO...OSWEGO...JOLIET 247 AM CST FRI JAN 13 2012 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS CANCELLED THE WINTER STORM WARNING. SNOWFALL HAS DECREASED IN INTENSITY EARLY THIS MORNING...AND LITTLE TO NO ADDITIONAL ACCUMULATION IS EXPECTED. SOME BLOWING AND DRIFTING SNOW WILL CONTINUE THIS MORNING AS WINDS REMAIN GUSTY OUT OF THE NORTHWEST. HOWEVER...SIGNIFICANT RESTRICTIONS TO VISIBILITIES ARE NO LONGER EXPECTED. $$ ILZ003-004-008-010-011-019-021-032-131000- /O.CAN.KLOT.WW.Y.0001.000000T0000Z-120113T1000Z/ WINNEBAGO-BOONE-OGLE-LEE-DE KALB-LA SALLE-GRUNDY-LIVINGSTON- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON... DEKALB...OTTAWA...MORRIS...PONTIAC 247 AM CST FRI JAN 13 2012 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOWFALL HAS DECREASED IN INTENSITY EARLY THIS MORNING...AND LITTLE TO NO ADDITIONAL ACCUMULATION IS EXPECTED. SOME LIGHT SNOW AND BLOWING SNOW WILL CONTINUE THIS MORNING AS WINDS REMAIN GUSTY OUT OF THE NORTHWEST. HOWEVER...SIGNIFICANT RESTRICTIONS TO VISIBILITIES ARE NO LONGER EXPECTED. $$ ILZ023-033-039-131000- /O.CAN.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ KANKAKEE-IROQUOIS-FORD- INCLUDING THE CITIES OF...KANKAKEE...WATSEKA...PAXTON 247 AM CST FRI JAN 13 2012 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOWFALL HAS DECREASED IN INTENSITY EARLY THIS MORNING...AND LITTLE TO NO ADDITIONAL ACCUMULATION IS EXPECTED. SOME BLOWING AND DRIFTING SNOW WILL CONTINUE THIS MORNING AS WINDS REMAIN GUSTY OUT OF THE NORTHWEST. HOWEVER...SIGNIFICANT RESTRICTIONS TO VISIBILITIES ARE NO LONGER EXPECTED. $$ INZ002-131500- /O.CON.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ PORTER- INCLUDING THE CITY OF...VALPARAISO 247 AM CST FRI JAN 13 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING. * TIMING...LIGHT SNOW WILL CONTINUE BEFORE GRADUALLY TAPERING OFF LATER THIS MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WEST TO NORTHWEST WINDS WILL CONTINUE AT 15 TO 25 MPH...WITH GUSTS UP TO 35 MPH. THESE WINDS WILL CONTINUE TO PRODUCE BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES FROM BLOWING SNOW WILL LIKELY MAKE TRAVEL DIFFICULT IN OPEN AREAS EARLY THIS MORNING. 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. && $$ INZ001-131500- /O.CON.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ LAKE IN- INCLUDING THE CITY OF...GARY 247 AM CST FRI JAN 13 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING. * TIMING...LIGHT SNOW WILL CONTINUE BEFORE GRADUALLY TAPERING OFF LATER THIS MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 8 INCHES ARE LIKELY. * HAZARDS...IN ADDITION TO THE FALLING SNOW...WEST TO NORTHWEST WINDS WILL CONTINUE AT 15 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL TREACHEROUS EARLY THIS MORNING...ESPECIALLY IN OPEN AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ INZ010-011-019-131500- /O.CON.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ NEWTON-JASPER-BENTON- INCLUDING THE CITIES OF...MOROCCO...RENSSELAER...FOWLER 247 AM CST FRI JAN 13 2012 /347 AM EST FRI JAN 13 2012/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST /10 AM EST/ THIS MORNING. * TIMING...LIGHT SNOW WILL CONTINUE BEFORE GRADUALLY TAPERING OFF LATER THIS MORNING. * ACCUMULATIONS...SNOWFALL TOTALS OF 4 TO 7 INCHES ARE LIKELY WITH LOCALLY HEAVIER TOTALS POSSIBLE. * HAZARDS...IN ADDITION TO THE FALLING SNOW...NORTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 35 MPH WILL CONTINUE TO RESULT IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. * IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL RESULT IN DIFFICULT TRAVEL CONDITIONS EARLY THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN AREAS. && $$ KJB
379 WWUS43 KLOT 131504 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 904 AM CST FRI JAN 13 2012 INZ001-002-131615- /O.EXP.KLOT.WS.W.0001.000000T0000Z-120113T1500Z/ LAKE IN-PORTER- INCLUDING THE CITIES OF...GARY...VALPARAISO 904 AM CST FRI JAN 13 2012 ...WINTER STORM WARNING HAS EXPIRED... THE WINTER STORM WARNING IS NO LONGER IN EFFECT. SNOWFALL HAS DECREASED IN INTENSITY EARLY THIS MORNING...AND ONLY MINOR ACCUMULATION IS EXPECTED. SOME BLOWING AND DRIFTING SNOW WILL CONTINUE AS WINDS REMAIN GUSTY OUT OF THE NORTHWEST. HOWEVER...SIGNIFICANT RESTRICTIONS TO VISIBILITIES ARE NO LONGER EXPECTED. $$ INZ010-011-019-131615- /O.EXP.KLOT.WW.Y.0001.000000T0000Z-120113T1500Z/ NEWTON-JASPER-BENTON- INCLUDING THE CITIES OF...MOROCCO...RENSSELAER...FOWLER 904 AM CST FRI JAN 13 2012 /1004 AM EST FRI JAN 13 2012/ ...WINTER WEATHER ADVISORY HAS EXPIRED... THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. SNOWFALL HAS DECREASED IN INTENSITY EARLY THIS MORNING...AND LITTLE TO NO ADDITIONAL ACCUMULATION IS EXPECTED. SOME LIGHT SNOW AND BLOWING SNOW WILL CONTINUE THIS MORNING AS WINDS REMAIN GUSTY OUT OF THE NORTHWEST. HOWEVER...SIGNIFICANT RESTRICTIONS TO VISIBILITIES ARE NO LONGER EXPECTED. $$ SHEA
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 Jan 12, 3:09 AM CST, 23 minutes earlier.
Area forecast discussion, Jan 12, 3:09 AM CST, 23 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
309 AM CST THU JAN 12 2012
.DISCUSSION...
309 AM CST
NEAR TERM (NOW THROUGH FRIDAY)...
VERY LITTLE CHANGE FROM PREVIOUS FORECAST WITH ONLY REAL ADJUSTMENT
BEING UPGRADING TO A WARNING FOR PORTER COUNTY DUE TO SOME LAKE
ENHANCEMENT THIS AFTERNOON POSSIBLY INTO VERY EARLY THIS EVENING.
POTENT VORT MAX EVIDENT ON WATER VAPOR IMAGERY OVER KS EARLY THIS
MORNING WILL CONTINUE TO CHARGE EASTWARD AND RESULT IN ENTIRE TROUGH
AXIS BECOMING INCREASINGLY NEGATIVELY TILTED TODAY INTO TONIGHT. AS
THIS OCCURS THE NORTH-SOUTH AXIS OF LIGHT-MODERATE SNOW EXTENDING
FROM WESTERN WI SOUTH INTO MISSOURI AT 09Z IS LIKELY TO GRADUALLY
BECOME RE-ORIENTED INTO A MORE NW-SE AXIS AS IT SHIFTS SLOWLY
EASTWARD. THE RE-ORIENTATION THATS EXPECTED TO TAKE PLACE WILL
RESULT IN A DECELERATION OF THE EASTWARD PROGRESSION OF THE SNOW
OVER NORTHWEST ILLINOIS AND STILL ANTICIPATE IT BEING LATE MORNING
BEFORE SNOW BREAKS OUT IN METRO CHICAGO AND POSSIBLY NOT TIL MID
MORNING AS FAR WEST AS ROCKFORD.
AS HAS BEEN NOTED FOR A COUPLE DAYS NOW...THE SYSTEM WILL NOT HAVE
AN ABUNDANCE OF MOISTURE TO WORK WITH HOWEVER WHAT IT LACKS IN
MOISTURE IT LOOKS TO MAKE UP FOR IN FORCING AND DURATION. AS THE
INTENSE COMPACT CLOSED LOW PLOWS EAST ITS PROGGED TO DEEPEN TODAY
RESULTING IN VERY IMPRESSIVE 12HR/500MB HEIGHT FALLS OVER 200DM VERY
DEEP MODERATE ASCENT EXPECTED. SYNOPTICALLY STILL APPEARS AS THOUGH
QPF ACROSS THE CWA WILL BE FAIRLY UNIFORM AND SUPPORTIVE OF A SOLID
4-8 INCH SNOWFALL CWA-WIDE. THERMAL PROFILES ARE A BIT WARMER THAN
IN PREVIOUS RUNS RESULTING IN SLIGHTLY LESS FAVORABLY DEEP DENDRITIC
GROWTH ZONE (DGZ) WHICH COULD CUT BACK ON SNOW:LIQUID RATIOS A BIT.
IN ADDITION...THE STRONG WINDS ALSO ARE NOT SUPPORTIVE OF
EXCEPTIONALLY HIGH SNOW:LIQUID RATIOS AND THINK A REASONABLE BALL
PARK GUESS IS THAT THEY WILL GENERALLY END UP IN THE BALLPARK OF
10-15:1.
INTERESTINGLY...SOME OF THE HI-RES MESOSCALE MODELS ARE SUGGESTING
THAT THERE COULD BE SOME MESOSCALE BANDING OF HEAVY SNOW DEVELOPING
BY THIS AFTERNOON OVER PORTIONS OF OUR CWA IN ASSOCIATION WITH
STRENGTHENING LOW LEVEL FRONTOGENETIC CIRCULATION. SHOULD THAT OCCUR
IT WOULD NOT BE AT ALL HARD TO ENVISION A BAND OF SNOWFALL TOTALS IN
8-12 INCH RANGE...PARTICULARLY CLOSE TO PIVOT POINT WHERE HEAVIER
SNOW BAND WILL SIT THE LONGEST AS THE ORIENTATION GOES FROM WNW-ESE
TO MORE NE-SW TONIGHT. REALLY IMPOSSIBLE TO PINPOINT THOSE TYPE OF
MESO-BETA SCALE TYPE PHENOMENA THIS FAR IN ADVANCE SO RATHER THAN
BLANKETING 23 COUNTIES WITH A WARNING WHEN ITD PROBABLY ONLY BE A
FRACTION OF THOSE REACH CRITERIA HAVE OPTED TO LET THE ADVISORY
RIDE WITH 4-8 INCH AMOUNTS AND JUST MENTION LOCALLY HEAVIER TOTALS
IN THE WSW. AS MESOSCALE DETAILS START TO UNFOLD LATER TODAY ITS
POSSIBLE THAT THE DAY SHIFT MAY NEED TO UPGRADE PORTIONS OF THE
ADVISORY TO A WARNING.
HAVE OPTED TO UPGRADE PORTER COUNTY INDIANA TO A WARNING...AS LOW
LEVEL TRAJECTORIES COULD ALLOW FOR A PERIOD OF LAKE ENHANCED
SNOWFALL THIS AFTERNOON. THE WINDOW OF OPPORTUNITY FOR LAKE
ENHANCEMENT FOR NE PORTER LOOKS SMALL AS CONDITIONS ARE LIKELY TO
BECOMING INCREASINGLY SUPPORTIVE OF LAKE ENHANCEMENT THIS AFTERNOON
BUT AT THE SAME TIME WINDS WILL BE BACKING WHICH SHOULD SENDING ANY
THREAT OF LAKE ENHANCEMENT EAST INTO IWX-LAND. BEFORE THAT OCCURS
SEEMS PLAUSIBLE THAT THE OCCURS COULD EASILY SEE NE PORTER PICKING
UP A COUPLE BONUS INCHES OF SNOW OFF THE LAKE.
SNOW LOOKS TO START WINDING DOWN AFTER MIDNIGHT AND ENDING
EVERYWHERE BY MID-LATE MORNING FRIDAY. NO CHANGES PLANNED TO THE
TIMING OF THE HEADLINES. WITH WINDS LIKELY TO GUST TO OVER 30 MPH
THIS AFTERNOON AND TONIGHT BLOWING AND DRIFTING SNOW WILL LIKELY BE
AN ISSUE WITH THIS STORM...PARTICULARLY TONIGHT AS SNOW BECOMES
FLUFFIER INCREASING ITS "BLOW-ABILITY".
IZZI
IN-BETWEEN TERM (FRIDAY NIGHT THROUGH SATURDAY NIGHT)...
IN THE WAKE OF THE STORM FOCUS WILL TURN TO TEMPS FRIDAY
NIGHT...WHICH WILL ULTIMATELY BE CLOSELY TIED TO HOW MUCH (IF ANY
CLEARING) WE SEE. MODELS ALL SUGGEST THAT STRATUS WILL CLEAR OUT
FRIDAY EVENING...BUT MODELS ARE ALSO NOTORIOUS FOR BREAKING STRATUS
UP TOO QUICKLY. SUSPECT THAT THERE IS A VERY REAL CHANCE THAT THE
STRATUS MAY NOT CLEAR OUT AT ALL BEFORE CLOUDINESS WITH SATURDAY'S
CLIPPER ARRIVES LATE FRIDAY NIGHT INTO SAT MORNING. GIVEN THE LOW
CONFIDENCE AT THIS DISTANCE HAVE TAKEN A CONSERVATIVE/MIDDLE OF THE
ROAD APPROACH TO TEMPS. ON THE ONE EXTREME...IF SKIES CLEAR OUT
WITH THE SURFACE RIDGE AXIS APPROACHING ITS A VERY REAL
POSSIBILITY THAT LOWS COULD DROP TO BETWEEN ZERO TO
-10...PARTICULARLY OVER NORTH CENTRAL ILLINOIS. CONVERSELY...IF
STRATUS HANGS ON TEMPS MAY END UP MOST IN THE LOW TO MID
TEENS...WHICH I SUSPECT IS PROBABLY THE MORE LIKELY SCENARIO.
BY SATURDAY A FAST MOVING CLIPPER IS PROGGED TO ZIP SOUTHEASTWARD
ACROSS THE MIDWEST. NOT AN OVERLY STRONG SYSTEM AND WILL BE MOISTURE
STARVED...BUT WITH PERSISTENT WARM AIR ADVECTION MIGHT BE ABLE TO
LAY DOWN A BAND OF AN INCH OR SO OF SNOW. MODELS GENERALLY TRACK
SURFACE LOW FROM NORTHERN IOWA INTO SOUTHERN ILLINOIS WHICH WOULD
FAVOR OUR WESTERN CWA FOR HIGHEST CHANCES OF SNOW. HAVE TRENDED POPS
UP IN THE GRIDS AGAIN...WELL ABOVE MOS GUIDANCE AND MORE IN LINE
WITH HPC QPF FORECAST OF GREATER THAN A TENTH OF AN INCH. CLIPPER
SHOULD BE OUT OF THE AREA BY LATER SATURDAY EVENING WITH CLOUDS
PROBABLY STICKING AROUND AND KEEPING TEMPS SOMEWHAT IN CHECK
SATURDAY NIGHT.
IZZI
LONG TERM (SUNDAY THROUGH WEDNESDAY)...
THE POLAR JET WHICH HAD BEEN ANCHORED TO OUR NORTH MUCH OF THE
WINTER WILL BE MORE PRESENT OVER THE MID-SECTION OF THE COUNTRY.
THIS SEEMS TIED TO A MORE ORGANIZED POLAR VORTEX DEVELOPING OVER
NORTHERN CANADA/BAFFIN ISLAND...A FEATURE CONDUCIVE FOR STEERING
COLD AIR PERIODS INTO CENTRAL CANADA AND OFTEN THE EASTERN HALF OF
THE U.S. THAT SAID...A RECOVERY FROM OUR IMMEDIATE COLD AIR SNAP
WILL BE SEEN AT THE START OF NEXT WEEK WITH 850 MB TEMPERATURES
RETURNING TO ABOVE ZERO BY MONDAY WITHIN DEEP SOUTHWEST FLOW. THE
PATTERN ACTUALLY WILL BRIEFLY RESEMBLE MUCH OF THE PAST
MONTH...HOWEVER ANTICIPATED SNOW COVER ON THE GROUND THROUGHOUT THE
REGION SHOULD KEEP THE NEAR-SURFACE AIR MASS COOLER THAN WHAT WE
HAVE SEEN RECENTLY WITH THE SAME TYPE OF AIR MASS. IN
ADDITION...MORE COLUMN MOISTURE IS PROJECTED IN ALL LONG RANGE
GUIDANCE DURING MONDAY...A HINT AT STRATUS WHICH WOULD BE MORE
FAVORED WITH MOIST AND MILD RETURN FLOW OVER SNOW COVER. HAVE GUIDED
MORE TOWARDS A BLEND OF RAW GUIDANCE FOR HIGHS AS OPPOSED TO THE
BIAS-CORRECTED WHICH HAS WORKED SO WELL FOR HIGH TEMPERATURES THE
PAST MONTH TO MONTH AND A HALF. FOR SUN NIGHT AND MON NIGHT HAVE
TRENDED TOWARDS THE MILDER BIAS-CORRECTED FORECASTS.
A COLD FRONT IS EXPECTED TO WORK THROUGH SOMETIME MONDAY NIGHT OR
TUESDAY...WITH A POTENTIAL LOW DEVELOPING ALONG IT DURING THAT
PERIOD. A MEAN SOLUTION ON THE MODELS HAS A LOW TRACKING NEAR OR
JUST TO THE WEST OF THE AREA. THIS WOULD AT LEAST INTRODUCE
THICKNESSES SUPPORTIVE OF RAIN/DRIZZLE DURING MONDAY AND MONDAY
NIGHT IN ANY PRECIPITATION THAT FALLS...AND THE CHANCE FOR
POTENTIALLY RAIN CHANGING TO SNOW LATER ON. SLOWER HAS BEEN BETTER
WITH SYSTEMS RECENTLY...AND THE 12.00 EC SLOWED EVEN FURTHER FROM
ITS PRECEDING RUN. CONFIDENCE IN THIS PERIOD IS LOW THOUGH WITH A
LOW DEVELOPING ALONG A FRONT WITH A SYSTEM THAT IS STILL WELL
OFFSHORE THE WEST COAST. INTERESTINGLY ENOUGH...DEW POINTS ARE
FORECAST TO CREEP UP TO THE MID 30S TO POSSIBLY LOWER 40S IN THE
FORECAST AREA...WHICH COMBINED WITH ANY RAIN/DRIZZLE WOULD LEAD TO
QUICK SNOW MELT AND POSSIBLY ADVECTION FOG.
BEYOND...BOTH THE 12.00 GFS AND EC HAVE THE NEXT COLD AIR DOME BUILT
IN SOUTHERN CANADA BY MIDWEEK WITH 850 MB TEMPS OF -30C OR COLDER.
THEY BOTH DIFFER VASTLY FROM RUN TO RUN IN HOW FAR SOUTH AND EAST
AND HOW QUICKLY THIS EVOLVES...AND WHETHER OR NOT IT WILL EVEN GET
HERE. THE JET LOOKS TO REMAIN ACTIVE AS WELL...SO CONFIDENCE IN THIS
PERIOD IS LOW.
MTF
&&
.AVIATION...
//ORD AND MDW CONCERNS...UPDATED 08Z...
* CEILINGS LOWING TO MVFR BY ARND 10Z...LOWERING TO IFR SHORTLY
AFTER THE SNOW ONSET.
* SNOW DEVELOPING BY ARND 16Z AND CONTINUING THROUGH THE
REMAINDER OF THE FORECAST PERIOD.
* VIS DROPPING TO IFR LIKELY SHORTLY AFTER SNOW ONSET. PERIODS OF
1/2SM VIS LIKELY FROM LATE AFTERNOON THROUGH THE EVENING WITH
INCREASING SNOWFALL RATES AND INCREASING WINDS.
* CHANCE OF VIS DROPPING TO 1/4SM OR LESS DURING THE EARLY EVENING
AS BLOWING SNOW DEVELOPS AS DECREASING TEMPERATURES CAUSE A
DRIER SNOW CHARACTERISTIC.
KREIN
//DISCUSSION...UPDATED 06Z...
NOT MUCH CHANGE FROM PREVIOUS THINKING.
THE FIRST APPRECIABLE WINTER WEATHER EVENT OF THE SEASON IS STILL
SET TO IMPACT THE TERMINALS FOR MUCH OF THE DAY ON THURSDAY AND INTO
THURSDAY NIGHT. THIS IS A RATHER COMPLEX AND DYNAMICAL STORM
SYSTEM THAT LOOKS TO BRING A PERIOD OF MODERATE TO HEAVY SNOW TO
THE NORTHEASTERN ILLINOIS TERMINALS DURING THE AFTERNOON AND
EVENING HOURS ON THURSDAY. THIS WILL BE THE MAIN CONCERN AS SNOW
AND BLOWING SNOW WILL LIKELY LEAD TO A PERIOD OF IFR TO LIFR VIS
AND CIGS THURSDAY AFTERNOON AND INTO THE EVENING.
THE MAIN COLD FRONT IS NOW MOVING ACROSS NORTH CENTRAL IL
NEAR KRFD. THIS FRONT SHOULD MOVE ACROSS NORTHEASTERN
ILLINOIS AFTER 07 UTC TONIGHT. BEHIND THIS FRONT...EXPECT WINDS TO
BECOME GUSTY OUT OF THE NORTHWEST. THE MAIN SURFACE LOW MOVING NORTH
ACROSS THE OHIO VALLEY LATE THIS EVENING...WILL QUICKLY INTENSIFY
DURING THE MORNING ON THURSDAY ACROSS THE GREAT LAKES REGION. THIS
WILL SET THE STAGE FOR GUSTY NORTHWEST WINDS THROUGH THE REMAINDER
OF THE FORECAST PERIOD.
AS FAR AS SNOWFALL...IT APPEARS SNOWFALL WILL BEGIN DURING
THE MID TO LATE MORNING HOURS (AFTER 16 UTC AT THE NORTHEASTERN
ILLINOIS TERMINALS) AS STRONG FORCING FOR ASCENT COMMENCES IN
RESPONSE TO THE ATMOSPHERIC DYNAMICS OF THIS DEEPENING SURFACE
LOW. I EXPECT THE ONSET TIME TO OCCUR AROUND OR SHORTLY AFTER 12
UTC AT KRFD. THE SNOW SHOULD PICK UP IN INTENSITY DURING THE
AFTERNOON HOURS (AFTER 19 UTC) AS THE DYNAMICS REACH A PEAK ALONG
THE LEADING EDGE OF THE COLDEST AIR. THIS STILL APPEARS TO
POSSIBLY RESULT IN A PERIOD OF VISIBILITIES IN SNOW AND BLOWING
SNOW UNDER 1/2 MILE THROUGH THE AFTERNOON AND EARLY EVENING. THE
SNOWFALL SHOULD BEGIN TO ABATE LATER THURSDAY NIGHT INTO FRIDAY
MORNING AS THE STORM SYSTEM SHIFTS EAST ACROSS THE EASTERN GREAT
LAKES.
KJB
//ORD AND MDW CONFIDENCE...UPDATED 08Z...
* HIGH CONFIDENCE WITH CEILING AND WIND TRENDS.
* HIGH CONFIDENCE OF SNOW WITH MEDIUM CONFIDENCE OF TIMING AND VIS
TRENDS ON THURSDAY.
* LOWER CONFIDENCE IN THE PROBABILITY OF VISIBILITY OCCASIONALLY
DROPPING TO 1/4SM OR LESS
KREIN
//OUTLOOK FOR ORD/MDW FOR 12Z FRIDAY-12Z WEDNESDAY...UPDATED 00Z...
FRIDAY...IFR CIGS/VIS EARLY IN SNOW AND BLOWING SNOW. CONDITIONS
IMPROVING THROUGH THE DAY.
SATURDAY...CHANCE OF SNOW WITH MVFR CIGS/VIS.
SUNDAY...VFR.
MONDAY AND TUESDAY...CHANCE OF SNOW SHOWERS WITH MVFR CIGS/VIS.
KJB
&&
.MARINE...
309 AM CST
A LOW PRESSURE SYSTEM OVER OHIO WILL MOVE INTO MICHIGAN THIS
AFTERNOON AND STRENGTHEN. IN ADDITION...ARCTIC AIR WILL POUR INTO
THE REGION TODAY. BETWEEN THESE TWO COMPONENTS...LOW END GALES WILL
FORM ACROSS LAKE MICHIGAN TODAY. WINDS WILL BE NORTH TO NORTHWEST
ALONG THE LAKE...THEREFORE EXPECTING GALES TO LEAK INTO THE INDIANA
NEARSHORE ZONES AS WELL. UPGRADED THE GALE WATCH TO A GALE WARNING
WITH THIS ISSUANCE. THE LOW QUICKLY MOVES EASTWARD FRIDAY AND HIGH
PRESSURE MOVES IN BEHIND IT FRIDAY NIGHT INTO SATURDAY. WINDS WILL
BECOME WESTERLY AND DIMINISH QUICKLY BEHIND THE LOW...BUT EXPECTING
HIGH WAVES TO PERSIST THROUGH EARLY FRIDAY NIGHT IN THE NEARSHORE
ZONES. A WEAKENING LOW PRESSURE SYSTEM PASSES SOUTH OF THE LAKE
LATE SATURDAY...AND WILL HAVE LITTLE TO NO IMPACT ON THE LAKE.
WINDS REMAIN WEAK THROUGH THE WEEKEND BUT BEGIN TO TURN SOUTHERLY
AND INCREASE SUNDAY EVENING AS THE PRESSURE GRADIENT INCREASES
BETWEEN HIGH PRESSURE OVER THE ATLANTIC COAST AND A DEVELOPING LOW
PRESSURE SYSTEM OVER MANITOBA.
JEE
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...WINTER WEATHER ADVISORY...ILZ003-ILZ004-ILZ008-ILZ010-ILZ011-
ILZ019-ILZ021-ILZ032...6 AM THURSDAY TO 4 AM FRIDAY.
WINTER WEATHER ADVISORY...ILZ005-ILZ006-ILZ012-ILZ013-ILZ014-
ILZ020-ILZ022-ILZ023-ILZ033-ILZ039...9 AM THURSDAY TO 9 AM
FRIDAY.
IN...WINTER WEATHER ADVISORY...INZ001-INZ002-INZ010-INZ011-INZ019...9
AM THURSDAY TO 9 AM FRIDAY.
LM...GALE WARNING...LMZ080-LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ744-LMZ745-LMZ777-
LMZ779-LMZ868-LMZ870-LMZ872-LMZ874-LMZ876-LMZ878...3 PM
THURSDAY TO 3 PM FRIDAY.
SMALL CRAFT ADVISORY...LMZ740-LMZ741-LMZ742-LMZ743...NOON
THURSDAY TO MIDNIGHT SATURDAY.
SMALL CRAFT ADVISORY...LMZ744-LMZ745...NOON THURSDAY TO 3 PM
THURSDAY.
&&Hazardous weather outlook, Jan 11, 9:29 PM CST, 6 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 929 PM CST WED JAN 11 2012 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 130330- 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- 929 PM CST WED JAN 11 2012 /1029 PM EST WED JAN 11 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...OVERNIGHT. SNOW WILL LIKELY DEVELOP TOWARDS DAYBREAK OVER NORTH CENTRAL ILLINOIS...MAINLY WEST OF INTERSTATE 39. LITTLE TO NO ACCUMULATION IS EXPECTED PRIOR TO DAYBREAK. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ACCUMULATING SNOW IS ANTICIPATED THURSDAY AND THURSDAY NIGHT... ENDING FRIDAY MORNING. THE GREATEST ACCUMULATIONS ARE FORECAST ACROSS NORTHEAST ILLINOIS AND NORTHWEST INDIANA DURING THE AFTERNOON AND EARLY EVENING. IN ADDITION TO THE FIRST APPRECIABLE ACCUMULATION OF THE SEASON...STRONG WINDS WILL RESULT IN BLOWING AND DRIFTING SNOW DURING THURSDAY NIGHT. THERE IS A CHANCE OF ACCUMULATING LIGHT SNOW AGAIN SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NECESSARY OVERNIGHT...BUT ANY SNOWFALL REPORTS DURING THURSDAY INTO EARLY FRIDAY WOULD BE APPRECIATED. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-130330- 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- 929 PM CST WED JAN 11 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...OVERNIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT THURSDAY AFTERNOON THROUGH FRIDAY NIGHT WITH A PERIOD OF GALE FORCE WINDS PROBABLE ALONG THE INDIANA SHORE. FREEZING SPRAY IS EXPECTED THURSDAY NIGHT INTO FRIDAY. && 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- 870-872-874-876-878-130330- 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- 929 PM CST WED JAN 11 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...OVERNIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. GALE FORCE WINDS AND FREEZING SPRAY ARE EXPECTED THURSDAY NIGHT INTO FRIDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO MTF
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 12, 3:46 AM CST | Gale Warning | LOT | 35 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.