Alert archive / Illinois / Winter Storm Warnings in 2016
Winter Storm Warning 3, NWS Chicago, IL
NWS Chicago, IL issued this winter storm warning at Feb 29, 2016, 3:47 AM CST for 4 counties in Illinois. It took effect at Feb 29, 2016, 9:00 PM CST. It was in force for 7 hr. 1 report 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
- Feb 29, 2016, 3:47 AM CST (09:47 UTC)
- In effect from
- Feb 29, 2016, 9:00 PM CST
- Expired
- Mar 1, 2016, 3:41 AM CST
- In force
- 7 hr
- Issued by
- NWS Chicago, IL
Counties Boone County, IL, Lake County, IL, McHenry County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 71 km from the middle of the area, began a volume at 09:50 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 |
|---|---|---|---|
| Feb 29, 10:00 PM CST | SNOW 0.6 | Gurnee, IL | SNOW AND SLEET ACCUM |
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 178 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
- 734 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
638 WWUS43 KLOT 290947 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 347 AM CST MON FEB 29 2016 ...ACCUMULATING SNOW EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING... .FAST MOVING WINTER STORM IS EXPECTED TO ARRIVE THIS EVENING ACROSS FAR NORTHWEST ILLINOIS AND OVERSPREAD ALL OF NORTHERN ILLINOIS BY LATE THIS EVENING. THE MAIN AREAS IMPACTED ARE ALONG AND NORTH OF THE INTERSTATE 80 CORRIDOR IN NORTHERN ILLINOIS...WITH THE HEAVIEST SNOWFALL LOCATED ALONG THE FAR NORTHERN COUNTIES OF ILLINOIS. BETWEEN THE INTERSTATE 80 CORRIDOR AND THE NORTHERN ROW OF COUNTIES...A PERIOD OF SLEET...FREEZING RAIN...AND SNOW WILL LIKELY CREATE VERY HAZARDOUS TRAVEL CONDITIONS THROUGH THE TUESDAY MORNING RUSH HOUR. TEMPERATURES WILL EVENTUALLY COOL TUESDAY MORNING TO TRANSITION ANY REMAINING SLEET...FREEZING RAIN TO ALL SNOW BEFORE ENDING TUESDAY AFTERNOON. ILZ003-004-291800- /O.NEW.KLOT.WS.W.0003.160301T0000Z-160301T1500Z/ WINNEBAGO-BOONE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE 347 AM CST MON FEB 29 2016 ...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST TUESDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST TUESDAY. * TIMING...SNOW WILL BEGIN THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. AT THE ONSET...PRECIPITATION MAY BRIEFLY START AS A MIX OF RAIN OR SLEET THEN QUICKLY TRANSITION TO ALL SNOW. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATIONS OF 4 TO 6 INCHES LIKELY. SNOWFALL TOTALS COULD BE LOCALLY HIGHER ESPECIALLY ACROSS THE FAR NORTHERN PORTIONS OF THE COUNTIES. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO BETWEEN ONE HALF MILE TO AT TIMES ONE QUARTER MILE. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. 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. && $$ ILZ005-006-291800- /O.NEW.KLOT.WS.W.0003.160301T0300Z-160301T1500Z/ MCHENRY-LAKE IL- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN 347 AM CST MON FEB 29 2016 ...WINTER STORM WARNING IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY. * TIMING...SNOW WILL BEGIN THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. AT THE ONSET...PRECIPITATION MAY BRIEFLY START AS A MIX OF RAIN OR SLEET THEN QUICKLY TRANSITION TO ALL SNOW. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATIONS OF 4 TO 6 INCHES LIKELY. SNOWFALL TOTALS COULD BE LOCALLY HIGHER ESPECIALLY ACROSS THE FAR NORTHERN PORTIONS OF THE COUNTIES. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO BETWEEN ONE HALF MILE TO AT TIMES ONE QUARTER MILE. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ008-010-011-291800- /O.NEW.KLOT.WW.Y.0006.160301T0000Z-160301T1500Z/ OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...OREGON...DIXON...DEKALB 347 AM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST TUESDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST TUESDAY. * TIMING...LIGHT RAIN WILL BECOME MIXED WITH FREEZING RAIN...SLEET...AND SNOW THIS EVENING...THEN BECOME ALL SNOW DURING THE EARLY MORNING HOURS TUESDAY. * SNOW ACCUMULATION...BETWEEN 2 TO 4 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO AROUND ONE HALF MILE AT TIMES. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ ILZ012>014-291800- /O.NEW.KLOT.WW.Y.0006.160301T0300Z-160301T1500Z/ KANE-DUPAGE-COOK- INCLUDING THE CITIES OF...AURORA...WHEATON...CHICAGO 347 AM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY. * TIMING...LIGHT RAIN WILL BECOME MIXED WITH FREEZING RAIN...SLEET...AND SNOW LATE THIS EVENING...THEN BECOME ALL SNOW DURING THE EARLY MORNING HOURS TUESDAY. * SNOW ACCUMULATION...BETWEEN 2 TO 4 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO AROUND ONE HALF MILE AT TIMES. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ BEACHLER
4 follow-up statements
832 WWUS43 KLOT 291719 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 1119 AM CST MON FEB 29 2016 ILZ003-004-010130- /O.CON.KLOT.WS.W.0003.160301T0000Z-160301T1500Z/ WINNEBAGO-BOONE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE 1119 AM CST MON FEB 29 2016 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...SNOW WILL BEGIN THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. AT THE ONSET...PRECIPITATION MAY BRIEFLY START AS A MIX OF RAIN OR SLEET THEN QUICKLY TRANSITION TO ALL SNOW. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATIONS OF 4 TO 6 INCHES LIKELY. SNOWFALL TOTALS COULD BE LOCALLY HIGHER ESPECIALLY ACROSS THE FAR NORTHERN PORTIONS OF THE COUNTIES. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO BETWEEN ONE HALF MILE TO AT TIMES ONE QUARTER MILE. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. 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. && $$ ILZ005-006-010130- /O.CON.KLOT.WS.W.0003.160301T0300Z-160301T1500Z/ MCHENRY-LAKE IL- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN 1119 AM CST MON FEB 29 2016 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...SNOW WILL BEGIN THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. AT THE ONSET...PRECIPITATION MAY BRIEFLY START AS A MIX OF RAIN OR SLEET THEN QUICKLY TRANSITION TO ALL SNOW. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATIONS OF 4 TO 6 INCHES LIKELY. SNOWFALL TOTALS COULD BE LOCALLY HIGHER ESPECIALLY ACROSS THE FAR NORTHERN PORTIONS OF THE COUNTIES. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO BETWEEN ONE HALF MILE TO AT TIMES ONE QUARTER MILE. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ008-010-011-010130- /O.CON.KLOT.WW.Y.0006.160301T0000Z-160301T1500Z/ OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...OREGON...DIXON...DEKALB 1119 AM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...LIGHT RAIN WILL BECOME MIXED WITH FREEZING RAIN... SLEET...AND SNOW THIS EVENING...THEN BECOME ALL SNOW DURING THE EARLY MORNING HOURS TUESDAY. * SNOW ACCUMULATION...BETWEEN 2 TO 4 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO AROUND ONE HALF MILE AT TIMES. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ ILZ012>014-010130- /O.CON.KLOT.WW.Y.0006.160301T0300Z-160301T1500Z/ KANE-DUPAGE-COOK- INCLUDING THE CITIES OF...AURORA...WHEATON...CHICAGO 1119 AM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...LIGHT RAIN WILL BECOME MIXED WITH FREEZING RAIN... SLEET...AND SNOW LATE THIS EVENING...THEN BECOME ALL SNOW DURING THE EARLY MORNING HOURS TUESDAY. * SNOW ACCUMULATION...BETWEEN 2 TO 4 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING. * OTHER IMPACTS...STRONG NORTHEASTERLY WINDS WILL GUST BETWEEN 25 TO 35 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES TO AROUND ONE HALF MILE AT TIMES. THIS WILL CAUSE DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ RC
784 WWUS43 KLOT 292119 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 319 PM CST MON FEB 29 2016 ILZ003-004-010530- /O.EXT.KLOT.WS.W.0003.160301T0300Z-160301T1500Z/ WINNEBAGO-BOONE- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE 319 PM CST MON FEB 29 2016 ...WINTER STORM WARNING NOW IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...SNOW WILL BEGIN THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. AT THE ONSET...PRECIPITATION MAY BRIEFLY START AS A MIX OF RAIN OR SLEET THEN QUICKLY TRANSITION TO ALL SNOW. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATIONS OF 4 TO 7 INCHES LIKELY...WITH ISOLATED HIGHER TOTALS POSSIBLE. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES RESULTING IN DANGEROUS TRAVEL CONDITIONS. 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. && $$ ILZ005-006-010530- /O.CON.KLOT.WS.W.0003.160301T0300Z-160301T1500Z/ MCHENRY-LAKE IL- INCLUDING THE CITIES OF...WOODSTOCK...WAUKEGAN 319 PM CST MON FEB 29 2016 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...SNOW WILL BEGIN THIS EVENING AND CONTINUE THROUGH TUESDAY MORNING. AT THE ONSET...PRECIPITATION MAY BRIEFLY START AS A MIX OF RAIN OR SLEET THEN QUICKLY TRANSITION TO ALL SNOW. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATIONS OF 4 TO 7 INCHES LIKELY...WITH ISOLATED HIGHER TOTALS POSSIBLE. * OTHER IMPACTS...NORTHEASTERLY COULD GUST TO 30 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITIES RESULTING IN DANGEROUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ ILZ008-010-011-010530- /O.EXT.KLOT.WW.Y.0006.160301T0300Z-160301T1500Z/ OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...OREGON...DIXON...DEKALB 319 PM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...RAIN WILL BECOME MIXED WITH FREEZING RAIN... SLEET...AND SNOW THIS EVENING...THEN CHANGE TO ALL SNOW LATE TONIGHT OR TUESDAY MORNING. * SNOW ACCUMULATION...BETWEEN 1 TO 5 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING...WITH THE HEAVIER AMOUNTS LIKELY OVER NORTHERN OGLE AND NORTHERN DEKALB COUNTIES * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ ILZ012>014-010530- /O.CON.KLOT.WW.Y.0006.160301T0300Z-160301T1500Z/ KANE-DUPAGE-COOK- INCLUDING THE CITIES OF...AURORA...WHEATON...CHICAGO 319 PM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM CST TUESDAY... * TIMING...RAIN WILL BECOME MIXED WITH FREEZING RAIN...SLEET...AND SNOW LATE THIS EVENING...THEN BECOME ALL SNOW DURING THE EARLY MORNING HOURS TUESDAY. * SNOW ACCUMULATION...BETWEEN 1 TO 5 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING...WITH THE HEAVIEST AMOUNTS EXPECTED OVER FAR NORTHERN COOK AND NORTHERN KANE COUNTIES. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ RC
713 WWUS43 KLOT 010318 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 918 PM CST MON FEB 29 2016 ...IMPACTING WINTER WEATHER THROUGH TUESDAY MORNING... ILZ003>006-011130- /O.CON.KLOT.WS.W.0003.000000T0000Z-160301T1500Z/ WINNEBAGO-BOONE-MCHENRY-LAKE IL- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK... WAUKEGAN 918 PM CST MON FEB 29 2016 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST TUESDAY... * TIMING...MAINLY SNOW WILL CONTINUE THROUGH MID TO LATE MORNING TUESDAY. * SNOW ACCUMULATION...HEAVY WET SNOW ACCUMULATION OF 4 TO 7 INCHES LIKELY...WITH ISOLATED HIGHER TOTALS POSSIBLE. * ICE ACCUMULATION...MINOR ICE ACCUMULATION...ESPECIALLY ALONG AND SOUTH OF I-90 TONIGHT. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF HEAVY SNOW AND GUSTY WINDS WILL CREATE SIGNIFICANTLY REDUCED VISIBILITY RESULTING IN DANGEROUS TRAVEL CONDITIONS. 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. && $$ ILZ008-010-011-011130- /O.CON.KLOT.WW.Y.0006.000000T0000Z-160301T1500Z/ OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...OREGON...DIXON...DEKALB 918 PM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST TUESDAY... * TIMING...A COMBINATION OF OCCASIONAL LIGHT SLEET AND FREEZING RAIN WILL MIX WITH AND EVENTUALLY BECOME ALL SNOW LATE TONIGHT...WITH THE SNOW CONTINUING INTO MID TO LATE MORNING TUESDAY. * ICE ACCUMULATION...A LIGHT COATING OF ICE IS POSSIBLE TONIGHT CAUSING SLICK ROAD CONDITIONS. * SNOW ACCUMULATION...BETWEEN 1 AND 4 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING...WITH THE HEAVIER AMOUNTS LIKELY OVER NORTHERN OGLE AND NORTHERN DEKALB COUNTIES * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ ILZ012>014-011130- /O.CON.KLOT.WW.Y.0006.000000T0000Z-160301T1500Z/ KANE-DUPAGE-COOK- INCLUDING THE CITIES OF...AURORA...WHEATON...CHICAGO 918 PM CST MON FEB 29 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST TUESDAY... * TIMING...A COMBINATION OF SLEET AND RAIN WILL BECOME MORE FREEZING RAIN...SLEET...AND SNOW OVERNIGHT...AND THEN EVENTUALLY ALL SNOW FROM NORTH TO SOUTH NEAR OR SHORTLY AFTER DAYBREAK AND ENDING LATE TUESDAY MORNING. * ICE ACCUMULATION...A LIGHT COATING OF ICE IS POSSIBLE TONIGHT CAUSING SLICK ROAD CONDITIONS. * SNOW ACCUMULATION...BETWEEN 1 AND 4 INCHES OF SNOWFALL IS EXPECTED LATE TONIGHT THROUGH TUESDAY MORNING...WITH THE HEAVIEST AMOUNTS EXPECTED OVER FAR NORTHERN COOK AND NORTHERN KANE COUNTIES. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MTF/RC
563 WWUS43 KLOT 010941 WSWLOT URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE CHICAGO IL 341 AM CST TUE MAR 1 2016 ILZ003>006-011500- /O.CAN.KLOT.WS.W.0003.000000T0000Z-160301T1500Z/ /O.EXA.KLOT.WW.Y.0006.000000T0000Z-160301T1500Z/ WINNEBAGO-BOONE-MCHENRY-LAKE IL- INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK... WAUKEGAN 341 AM CST TUE MAR 1 2016 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM CST THIS MORNING... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 9 AM CST THIS MORNING. THE WINTER STORM WARNING HAS BEEN CANCELLED. * TIMING...A COMBINATION OF FREEZING RAIN...SLEET...AND SNOW BECOMING ALL SNOW WILL CONTINUE THROUGH THIS MORNING. * ICE ACCUMULATION...A LIGHT COATING OF ICE IS POSSIBLE EARLY THIS MORNING...CAUSING SLICK ROAD CONDITIONS ON UNTREATED SURFACES. * SNOW ACCUMULATION...BETWEEN 1 AND 4 INCHES OF SNOWFALL IS EXPECTED THROUGH THIS MORNING. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ ILZ008-010-011-011500- /O.CON.KLOT.WW.Y.0006.000000T0000Z-160301T1500Z/ OGLE-LEE-DE KALB- INCLUDING THE CITIES OF...OREGON...DIXON...DEKALB 341 AM CST TUE MAR 1 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * TIMING...A COMBINATION OF FREEZING RAIN...SLEET...AND SNOW BECOMING ALL SNOW WILL CONTINUE THROUGH THIS MORNING. * ICE ACCUMULATION...A LIGHT COATING OF ICE IS POSSIBLE EARLY THIS MORNING...CAUSING SLICK ROAD CONDITIONS ON UNTREATED SURFACES. * SNOW ACCUMULATION...BETWEEN 1 AND 3 INCHES OF SNOWFALL IS EXPECTED THROUGH THIS MORNING. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ ILZ012>014-011500- /O.CON.KLOT.WW.Y.0006.000000T0000Z-160301T1500Z/ KANE-DUPAGE-COOK- INCLUDING THE CITIES OF...AURORA...WHEATON...CHICAGO 341 AM CST TUE MAR 1 2016 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * TIMING...A COMBINATION OF FREEZING RAIN...SLEET...AND SNOW BECOMING ALL SNOW WILL CONTINUE THROUGH THIS MORNING. * ICE ACCUMULATION...A LIGHT COATING OF ICE IS POSSIBLE EARLY THIS MORNING...CAUSING SLICK ROAD CONDITIONS ON UNTREATED SURFACES. * SNOW ACCUMULATION...BETWEEN 1 AND 3 INCHES OF SNOWFALL IS EXPECTED THROUGH THIS MORNING. * OTHER IMPACTS...NORTHEASTERLY WINDS WILL GUST TO 30 MPH AT TIMES. THE COMBINATION OF SNOW AND GUSTY WINDS WILL CREATE REDUCED VISIBILITIES RESULTING IN HAZARDOUS TRAVEL CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ BEACHLER
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 Feb 29, 3:10 AM CST, 37 minutes earlier.
Area forecast discussion, Feb 29, 3:10 AM CST, 37 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
310 AM CST MON FEB 29 2016
.SHORT TERM...
309 AM CST
THROUGH TUESDAY...
BACK EDGE OF CLOUDS BEGINNING TO APPROACH THE WESTERN PORTIONS OF IL
WITH WINDS BEGINNING TO TURN WESTERLY AND EVENTUALLY SOUTHWESTERLY
BY MID-MORNING. THE MAIN CONCERN FOR TODAY WILL BE HOW WARM TEMPS
BECOME...THEN FOCUS TURNS TOWARDS A FRONTAL BOUNDARY SLIDING SOUTH
ALONG LAKE MICHIGAN THAT WILL THEN BLEED SOUTHWEST ACROSS
NORTHEASTERN IL THIS AFTERNOON.
GUIDANCE HAS TRENDED WARMER FOR THIS AFTERNOON WITH A STRONG
SOUTHWESTERLY AND WELL MIXED LAYER LIFT NORTHEAST ACROSS THE
FORECAST AREA. MOST HI-RES SOLUTIONS NUDGE THE THERMAL RIDGE BACK
NORTH BY MIDDAY...AND PROG TEMPS APPROACHING THE MID/UPR 50S BY
EARLY AFTN. SIMULTANEOUSLY AS THE TEMPS WARM INTO
NORTHERN/NORTHEASTERN IL...A FRONTAL BOUNDARY WILL BE SLIDING SOUTH
AND NEARING MILWAUKEE BY 19-20Z AND LIKELY REACH FAR NORTHEAST IL BY
21-22Z. SOME OF THE GUIDANCE HAS SLOWED THIS BOUNDARY UNTIL CLOSER
TO 23Z...BUT THIS BOUNDARY WILL LIKELY BRING STRATUS LAYER SOUTH AND
SHIFT WINDS TO THE NORTHEAST/EAST UPON PASSAGE. SOME ADDED LOW LEVEL
CONVERGENCE INTO A MOISTENING BOUNDARY MAY HELP TO TOUCH OFF A
SHOWER OR TWO...AND GIVEN THE WARMTH PRECEEDING THE FROPA...TEMPS
SHOULD BE WARM ENOUGH THAT ANY PRECIP WOULD BE LIGHT RAIN.
CONFIDENCE IS LOW IN DEVELOPMENT AND HAVE LEANED TOWARDS MORE OF A
DRY BOUNDARY WITH LOW CLOUDS.
TONIGHT THROUGH TUESDAY... MAIN CONCERN FOR TONIGHT WILL CONTINUE TO
BE ON THE POTENTIAL FOR A WINTER STORM FOCUSED IN FAR NORTHERN IL
AND SOUTHERN WI. GUIDANCE HAS DEMONSTRATED SOME DEGREE OF
CONSISTENCY WITH A INTENSE FRONTOGENETICAL BAND DEVELOPING ALONG THE
STATELINE AND SOUTHERN WISC. LOCAL ARW-WRF GUIDANCE IS DEMONSTRATING
THIS WELL...HOWEVER THE CONCERN IS HOW FAR SOUTH THE FRONTAL
BOUNDARY WILL SAG AS THERE IS SOME INDICATION THAT THE 850MB LOW
WILL SLIDE EAST INTO NORTHEASTERN IOWA BETWEEN 3-6Z TUE...WITH THE
BAROCLINIC ZONE ORIENTED OVER A ROCKFORD TO WAUKEGAN LINE AT THIS
TIME. LOW LEVEL EASTERLY FLOW SHARPENS AHEAD OF THE 850MB
LOW...WHICH PLACES THE NORTHERN COUNTIES OF ILLINOIS INTO THE PRIME
FGEN BANDED REGION. THERE DOES REMAIN SOME CONCERN WITH THE
DEVELOPMENT FOR THIS EVENT MAINLY WITH THE FAVORED DENDRITIC GROWTH
ZONE...WHICH MAY NOT BE COMPLETELY SATURATED AND PERHAPS JUST A
LITTLE TOO ELEVATED. THIS WOULD LIKELY RESULT IN MUCH LOWER SNOW
TOTALS...BUT COULD ALLOW THE PRECIP TYPE TO BE MORE OF AN ISSUE
TOWARDS A SLEET/SNOW/FREEZING RAIN. QPF REMAINS TIGHTLY FOCUSED
ALONG AND NORTH OF I-80 IN NORTHERN IL...AND BASED ON SNOW RATIOS AT
THE ONSET OF 8:1 TO 10:1...ACCUMS MAY INITIALLY STRUGGLE UNTIL AFT
9Z TUE WHEN THE BETTER MOISTURE REACHES THE DGZ AND OMEGA/LIFT
MAXIMIZES. THUS THERE WOULD BE SNOW RATES WITHIN THE 6-12Z TUE
TIMEFRAME REACH AN INCH PER HOUR. FURTHER COMPOUNDING THIS EVENT AND
MAKING FOR A HAZARDOUS ONE IS THE FACT THAT WINDS WILL BE GUSTING
BETWEEN 20-30 MPH. SO EVEN IF THE SNWOFALL TOTALS STRUGGLE TO REACH
WARNING CRITERIA...THE OTHER ELEMENTS WILL PRODUCE A VERY HAZAROUS
OVERNIGHT INTO TUE DAYBREAK CONDITION.
THE AFOREMENTIONED WAS FOCUSED ON THE SNOW ACCUMS/WINTER STORM
WARNING ASPECT...UNFORTUNATLEY JUST SOUTH OF THOSE COUNTIES IS THE
CONCERN FOR FREEZING RAIN/SLEET WITH SOME LIGHT SNOW ACCUMS. THERE
STILL REMAINS CONSIDERABLE UNCERTAINTY WITH RESPECT TO THE THERMAL
PROFILES...WHICH WILL DICTATE WHO/WHERE PRECIP TYPE IS LIQUID OR
FROZEN. BUT THERE IS ENOUGH CONFIDENCE THAT JUST SOUTH OF THE
WARNING A CHANNEL OF MIXED P-TYPE WILL OCCUR...AND SREF ENSEMBLE
MEMBERS HAVE BEEN STEADILY LEANING TOWARDS THIS SCENARIO AS WELL.
BUT THIS WILL ALL HINGE UPON THE PLACEMENT/TRACK OF THE 850MB
LOW...AS A SLIGHT NUDGE NORTH WOULD BRING WARMER AIR AND CHANGE P-
TYPE TO ALL LIQUID...AND SOUTH WOULD HAVE THE INVERSE EFFECT WITH
PERHAPS MORE SNOWFALL. BUT MY CONFIDENCE WITH THIS FORECAST PACKAGE
IS THAT THE COUNTIES SOUTH OF THE WARNING AND ALONG I-80 IN NORTHERN
IL WILL LIKELY SEE A PERIOD OF FREEZING RAIN/SLEET/SNOW.
TEMPS TONIGHT WILL FALL INTO THE UPR 20S TO AROUND 30...THEN HEADING
INTO MID-MORNING TUE THE SHORTWAVE WILL BE STRENGTHENING ACROSS
CENTRAL/SOUTHERN INDIANA AS THE 500MB TROUGH PIVOTS EAST ACROSS
IOWA/MISSOURI. ALONG THE NORTHWEST PORTION OF THE DEPARTING SFC WAVE
THE WRAP AROUND MOISTURE AND FGEN SHOULD SLIDE ACROSS THE REMAINING
COUNTIES SOUTH OF I-80 WITH SOME LIGHT ACCUMS THROUGH TUE EARLY
AFTN. COLD AIR ADVECTION DOES NOT ARRIVE UNTIL LATER TUE NGT...SO
TEMPS COULD HOVER IN THE LOW/MID 30S AGAIN TUE WITH THE EXCEPTION OF
THE FAR SOUTHEAST WHERE HIGHS WILL LIKELY OCCUR EARLY IN THE
MORNING.
BEACHLER
&&
.LONG TERM...
309 AM CST
WEDNESDAY THROUGH MONDAY...
500MB TROUGH WILL SLIDE EAST OVER THE GREAT LAKES REGION
WED...WITH A SECONDARY VORT MAX PROGGED TO DIVE SOUTH FROM WESTERN
CANADA INTO THE HIGH-PLAINS. WITH SFC RIDGING OVERHEAD WED...THERE
SHOULD BE A BRIEF PERIOD OF QUIET WEATHER. BUT THE SFC RIDGE WILL
QUICKLY MOVE EAST BY WED EVE...WITH THE EASTWARD PROGRESSION TO
THE CLIPPER SYSTEM NEARING THE MID-MISSOURI VALLEY BY WED EARLY
EVE AND SPREADING LIGHT SNOW OVER THE FORECAST AREA. GUIDANCE
ENHANCES THE SYSTEM EARLY THUR ACROSS CENTRAL IL/IN...WHICH COULD
PRODUCE SOME HIGHER QPF AND SOME ADDITIONAL LIGHT SNOW THROUGH
MIDDAY THUR. TEMPS WILL GENERALLY BE IN THE UPR 20S TO LOW
30S...WITH OVERNIGHT LOWS IN THE LOW 20S.
SATURDAY THROUGH SUNDAY... ACTIVE PATTERN CONTINUES INTO THE FIRST
HALF OF THE WEEKEND...THEN ENSEMBLES ARE INDICATING SOME WEAK
RIDGING SLIDING EAST TOWARDS THE GREAT LAKES REGION FOR THE SECOND
HALF OF THE WEEKEND INTO EARLY NEXT WEEK. GUIDANCE HAS BEEN SHOWING
A SYSTEM ARRIVING OVER THE REGION SAT...BUT QUICKLY LIFTING
NORTHEAST BY SAT NGT AS WARMER AIR BEGINS TO RETURN. CURRENT
INDICATIONS ARE THAT TEMPS WILL BE NEARING THE LOW 50S AGAIN BY LATE
NEXT WEEKEND INTO EARLY NEXT WEEK.
BEACHLER
&&
.AVIATION...
FOR THE 06Z TAFS...
MVFR STRATUS WILL LINGER THROUGH MUCH OF THE REMAINDER OF THE
OVERNIGHT BEFORE CLEARING TOWARD SUNRISE. GUSTY NORTHWEST WINDS
WILL SUBSIDE AND BACK TO WEST OVERNIGHT. WINDS WILL BECOME
SOUTHWEST AND BECOME RATHER GUSTY AGAIN MONDAY MORNING GRADUALLY
VEERING TO WEST IN THE AFTERNOON. ONE COLD FRONT WILL MOVE THROUGH
MID-LATE AFTERNOON MONDAY WITH WINDS SHIFTING TO NW BEHIND THAT
FRONT. SECONDARY LAKE COLD FRONT WILL SURGE IN QUICK ON THE HEELS
OF THE FIRST FRONT CAUSING WINDS TO SHIFT TO NORTHEAST WITH
STRATUS EVENTUALLY FILTERING IN BEHIND THE LAKE FRONT.
BIGGER UNCERTAINTY MONDAY EVENING WITH PRECIP CHANCES. THERMAL
PROFILES ARE LIKELY TO BE RIGHT NEAR THE TRANSITION ZONE BETWEEN
RA/PL/SN MONDAY EVENING...WITH PRIMARY QUESTION BEING WHERE NARROW
AND LIKELY INTENSE BAND OF PRECIPITATION WILL SET UP. SOME
GUIDANCE KEEPS IT NORTH OF ALL THE TERMINALS EXCEPT RFD...WHILE
OTHER HAVE IT RIGHT OVER THE CHICAGO AREA. GIVEN THE ANTICIPATED
NARROW NATURE OF THE BAND...CONFIDENCE IS LOW...SO ONLY RUNNING
WITH PROB30 FOR EVERYONE EXCEPT RFD FOR NOW.
IZZI
&&
.MARINE...
224 AM...LOW PRESSURE NORTH OF LAKE ONTARIO INTO SOUTHERN QUEBEC
WILL CONTINUE TO LIFT NORTHEAST TODAY. A SECOND AREA OF LOW
PRESSURE WILL MOVE ACROSS LAKE SUPERIOR THIS MORNING AND DEEPEN AS
IT MOVES INTO SOUTHERN QUEBEC LATER THIS AFTERNOON. THE GRADIENT
WILL QUICKLY TIGHTEN AHEAD OF THIS LOW WITH GALES DEVELOPING OVER
THE NORTHERN PART OF THE LAKE. A STRONG COLD FRONT WILL THEN MOVE
SOUTH ACROSS THE LAKE THIS AFTERNOON. WINDS WILL SHIFT NORTHERLY
AND SLOWLY BEGIN TO DIMINISH ACROSS THE NORTHERN PART OF THE LAKE
THIS AFTERNOON INTO THIS EVENING. NEW LOW PRESSURE DEVELOPING
ACROSS THE CENTRAL PLAINS THIS MORNING WILL MOVE ACROSS THE
SOUTHERN GREAT LAKES REGION AND OHIO VALLEY TUESDAY AND THIS WILL
MAINTAIN A FAIRLY STRONG GRADIENT ACROSS THE SOUTHERN PART OF THE
LAKE THROUGH TUESDAY NIGHT AND THERE COULD BE A PERIOD OF
NORTHERLY GALES TUESDAY AFTERNOON INTO TUESDAY EVENING...ON THE
SOUTH END OF THE LAKE. A RIDGE OF HIGH PRESSURE WILL MOVE ACROSS
THE LAKES REGION ON WEDNESDAY. WINDS WILL SHIFT BACK TO THE
NORTHEAST/EAST WEDNESDAY NIGHT INTO THURSDAY AS HIGH PRESSURE
REMAINS ACROSS THE NORTHERN LAKES AND ANOTHER LOW MOVES FROM THE
CENTRAL PLAINS TO THE OHIO VALLEY THURSDAY...AS IT SLOWLY WEAKENS.
CMS
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...WINTER STORM WARNING...ILZ003-ILZ004...6 PM MONDAY TO 9 AM
TUESDAY.
WINTER STORM WARNING...ILZ005-ILZ006...9 PM MONDAY TO 9 AM
TUESDAY.
WINTER WEATHER ADVISORY...ILZ008-ILZ010-ILZ011...6 PM MONDAY TO
9 AM TUESDAY.
WINTER WEATHER ADVISORY...ILZ012-ILZ013-ILZ014...9 PM MONDAY TO
9 AM TUESDAY.
IN...NONE.
LM...SMALL CRAFT ADVISORY...ILLINOIS NEARSHORE WATERS UNTIL 4 AM WEDNESDAY.
SMALL CRAFT ADVISORY...INDIANA NEARSHORE WATERS UNTIL 10 AM
WEDNESDAY.
&&
VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)
FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGOHazardous weather outlook, Feb 28, 3:38 PM CST, 12 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 338 PM CST SUN FEB 28 2016 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 292145- 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- 338 PM CST SUN FEB 28 2016 /438 PM EST SUN FEB 28 2016/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. SNOW ACCUMULATIONS ARE LIKELY MONDAY NIGHT THROUGH TUESDAY NIGHT...ESPECIALLY ALONG AND NORTH OF INTERSTATE 80. MINOR ICE ACCUMULATIONS ARE ALSO POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT. && LMZ740>745-292145- 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- 338 PM CST SUN FEB 28 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. GALE FORCE WINDS ARE LIKELY THROUGH EARLY TONIGHT IN BOTH THE ILLINOIS AND INDIANA NEARSHORE WATERS. AFTER THE GALES DIMINISH TONIGHT...STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT ESPECIALLY IN THE INDIANA WATERS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. HAZARDOUS WINDS AND WAVES WILL AGAIN BE LIKELY AT TIMES DURING THE EARLY TO MIDDLE PART OF THIS WEEK. && LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-292145- 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- 338 PM CST SUN FEB 28 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. OCCASIONAL GALE FORCE GUSTS ARE POSSIBLE ON SOUTHERN LAKE MICHIGAN THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. GALE FORCE WINDS ARE EXPECTED MONDAY MORNING THROUGH MONDAY AFTERNOON ACROSS THE NORTH HALF OF THE LAKE. && JEE VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE) FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT: WWW.FACEBOOK.COM/NWSCHICAGO WWW.TWITTER.COM/NWSCHICAGO WWW.YOUTUBE.COM/NWSCHICAGO
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 29, 3:47 AM CST | Winter Weather Advisory | LOT | Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more | 29 hr |
Nearby
Winter Storm Warnings in Illinois, 2016Every winter storm warning in 2016
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.