Alert archive / Illinois / Blizzard Warnings in 2012
Blizzard Warning 2, NWS Chicago, IL
NWS Chicago, IL issued this blizzard warning at Dec 20, 2012, 3:46 AM CST for 6 counties in Illinois. It took effect at Dec 20, 2012, 12:00 PM CST. It was in force for 12 hr. 18 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 20, 2012, 3:46 AM CST (09:46 UTC)
- In effect from
- Dec 20, 2012, 12:00 PM CST
- Expired
- Dec 20, 2012, 11:53 PM CST
- In force
- 12 hr
- Issued by
- NWS Chicago, IL
Counties Boone County, IL, DeKalb County, IL, LaSalle County, IL, Lee County, IL, Ogle County, IL, Winnebago County, IL
The radar
The Chicago radar (KLOT), 88 km from the middle of the area, began a volume at 09:45 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, 3:39 PM CST | SNOW 2 | Rockford, IL | LOW VISIBLITY ALSO. |
| Dec 20, 5:48 PM CST | SNOW 2.5 | 2 N Winnebago, IL | MEASURED AT WREX-TV |
| Dec 20, 5:55 PM CST | SNOW 0.5 | Rockford Airport, 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, 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, 9.8 hours before the alert went out and 126 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
- 910 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 268 m²/s²
- 0-3 km storm-relative helicity
- 439 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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. && $$ MDB/RATZER
5 follow-up statements
202 WWUS43 KLOT 201618 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1018 AM CST THU DEC 20 2012 ILZ003-004-008-010-210030- /O.CON.KLOT.BZ.W.0002.121220T1800Z-121221T0600Z/ WINNEBAGO-BOONE-OGLE-LEE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...OREGON...DIXON 1018 AM CST THU DEC 20 2012 ...BLIZZARD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * TIMING...RAIN WILL CHANGE TO SNOW BY EARLY AFTERNOON...WITH SNOW BECOMING HEAVY AT TIMES. SNOW WILL LINGER INTO THURSDAY NIGHT. STRONG WINDS WILL DEVELOP THIS AFTERNOON AND CONTINUE THIS EVENING. * SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 6 TO 9 INCHES ARE LIKELY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR. SNOW COULD ACCUMULATE IN EXCESS OF 1 TO 2 INCHES PER HOUR DURING THE MID AND LATE AFTERNOON HOURS. * WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH THIS AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED. * IMPACTS...THE COMBINATION OF THE HEAVY SNOW AND VERY STRONG WINDS WILL RESULT IN BLIZZARD CONDITIONS WHICH INCLUDE VISIBILITY AT OR NEAR ZERO AND SIGNIFICANT DRIFTING OF SNOW. THIS COMBINATION OF WIND AND VERY HEAVY SNOWFALL RATES WILL MAKE TRAVEL EXTREMELY DANGEROUS OR EVEN IMPOSSIBLE AT TIMES GIVEN THAT IT MAY BE VERY DIFFICULT TO KEEP UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ 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
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 3:55 AM CST | High Wind Warning | LOT | Ford, Iroquois, Kankakee, Livingston | 20 hr |
| Dec 20, 9:50 AM CST | River Flood Advisory | LOT | Will | 22 hr |
Nearby
Blizzard Warnings in Illinois, 2012Every blizzard 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.