Alert archive / Illinois / Wind Chill Advisories in 2021
Wind Chill Advisory 2, NWS Chicago, IL
NWS Chicago, IL issued this wind chill advisory at Feb 8, 2021, 3:10 PM CST for 9 counties in Illinois. It took effect at Feb 9, 2021, 12:00 AM CST. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Feb 8, 2021, 3:10 PM CST (21:10 UTC)
- In effect from
- Feb 9, 2021, 12:00 AM CST
- Expired
- Feb 9, 2021, 10:00 AM CST
- In force
- 10 hr
- Issued by
- NWS Chicago, IL
Counties Boone County, IL, DeKalb County, IL, Kane County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL
The radar
The Chicago radar (KLOT), 74 km from the middle of the area, began a volume at 21:10 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.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.2 hours before the alert went out and 142 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
- 765 m above ground
- 0-6 km bulk shear
- 110 kt
- 0-1 km storm-relative helicity
- 200 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
612 WWUS43 KLOT 082110 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 310 PM CST Mon Feb 8 2021 ILZ008-010>012-019-020-090515- /O.NEW.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ /O.CON.KLOT.WW.Y.0006.000000T0000Z-210209T0400Z/ Ogle-Lee-De Kalb-Kane-La Salle-Kendall- Including the cities of Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora, Elgin, Ottawa, Streator, La Salle, Mendota, Marseilles, Oswego, Yorkville, and Plano 310 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM CST THIS EVENING... ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM CST TUESDAY... * WHAT...For the Winter Weather Advisory, accumulating snow and travel impacts expected. Additional snow accumulations of up to one to two inches, for total accumulations up to two to three inches, with localized amounts in excess of three inches possible near the Interstate 88 corridor. For the Wind Chill Advisory, dangerously cold wind chills expected. Wind chills of 20 to 25 below zero, locally as cold as 30 below zero. * WHERE...Portions of north central and northeast Illinois. * WHEN...For the Winter Weather Advisory, until 10 PM CST this evening. For the Wind Chill Advisory, from midnight tonight to 10 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions and reduced visibility as low as one half mile at times. The hazardous conditions will impact the evening commute. The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. * ADDITIONAL DETAILS...The cold temperatures will make road treatments less effective. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. The latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. && $$ ILZ003>005-090515- /O.NEW.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ Winnebago-Boone-McHenry- Including the cities of Rockford, Belvidere, Crystal Lake, Algonquin, McHenry, and Woodstock 310 PM CST Mon Feb 8 2021 ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM CST TUESDAY... * WHAT...Dangerously cold wind chills expected. Wind chills of 20 to 25 below zero, locally as cold as 30 below zero. * WHERE...Winnebago, Boone and McHenry Counties. * WHEN...From midnight tonight to 10 AM CST Tuesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ ILZ013-021-103>108-INZ001-002-090400- /O.CON.KLOT.WW.Y.0006.000000T0000Z-210209T0400Z/ DuPage-Grundy-Northern Cook-Central Cook-Southern Cook- Northern Will-Southern Will-Eastern Will-Lake IN-Porter- Including the cities of Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Morris, Coal City, Minooka, Evanston, Des Plaines, Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn, Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park, Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon, Manhattan, Wilmington, Crete, Peotone, Beecher, Gary, Hammond, Merrillville, Portage, Valparaiso, and Chesterton 310 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM CST THIS EVENING... * WHAT...Accumulating snow and travel impacts expected. Total snow accumulations of one to three inches, with localized amounts in excess of three inches possible near the Interstate 88 corridor. * WHERE...Portions of northwest Indiana and northeast Illinois. * WHEN...Until 10 PM CST this evening. * IMPACTS...Plan on slippery road conditions and reduced visibility as low as one half mile at times. The hazardous conditions will impact the evening commute. * ADDITIONAL DETAILS...The cold temperatures will make road treatments less effective. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. In Illinois, the latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. In Indiana, the latest road conditions for Indiana are available by calling 1-800-261-7623. && $$ Castro
4 follow-up statements
390 WWUS43 KLOT 090351 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 951 PM CST Mon Feb 8 2021 ILZ008-010>012-020-091200- /O.EXP.KLOT.WW.Y.0006.000000T0000Z-210209T0400Z/ /O.CON.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ Ogle-Lee-De Kalb-Kane-Kendall- Including the cities of Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora, Elgin, Oswego, Yorkville, and Plano 951 PM CST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST TUESDAY... ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 PM CST THIS EVENING... * WHAT...Very cold wind chills expected. Wind chills as low as 25 below zero. * WHERE...Portions of north central and northeast Illinois. * WHEN...Midnight tonight to 10 AM CST Tuesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ ILZ013-103>106-090500- /O.EXP.KLOT.WW.Y.0006.000000T0000Z-210209T0400Z/ DuPage-Northern Cook-Central Cook-Southern Cook-Northern Will- Including the cities of Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Evanston, Des Plaines, Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn, Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park, Park Forest, Joliet, Bolingbrook, Plainfield, and Mokena 951 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 PM CST THIS EVENING... Accumulating snow is ending across the area. $$ ILZ019-091200- /O.EXT.KLOT.WW.Y.0006.000000T0000Z-210209T0600Z/ /O.CON.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ La Salle- Including the cities of Ottawa, Streator, La Salle, Mendota, and Marseilles 951 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT... ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST TUESDAY... * WHAT...For the Winter Weather Advisory, accumulating snow and travel impacts expected. Additional snow accumulations up to an inch across southern sections of the county, for total accumulations up to three inches. For the Wind Chill Advisory, very cold wind chills expected overnight. Wind chills as low as 20 below zero. * WHERE...La Salle County. * WHEN...For the Winter Weather Advisory, until midnight CST tonight. For the Wind Chill Advisory, until 10 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions and reduced visibility under one mile at times. The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. The latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. && $$ ILZ021-107-108-INZ001-090600- /O.EXT.KLOT.WW.Y.0006.000000T0000Z-210209T0600Z/ Grundy-Southern Will-Eastern Will-Lake IN- Including the cities of Morris, Coal City, Minooka, Channahon, Manhattan, Wilmington, Crete, Peotone, Beecher, Gary, Hammond, and Merrillville 951 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT... * WHAT...Accumulating snow and travel impacts expected. Total snow accumulations of one to three inches. * WHERE...Portions of northwest Indiana and northeast Illinois. * WHEN...Until midnight CST tonight. * IMPACTS...Plan on slippery road conditions and reduced visibility as low as one half mile at times. The hazardous conditions will impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. In Illinois, the latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. In Indiana, the latest road conditions for Indiana are available by calling 1-800-261-7623. && $$ INZ002-090900- /O.EXT.KLOT.WW.Y.0006.000000T0000Z-210209T0900Z/ Porter- Including the cities of Portage, Valparaiso, and Chesterton 951 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 3 AM CST TUESDAY... * WHAT...Accumulating snow and travel impacts expected. Total snow accumulations of one to four inches. * WHERE...Porter County. * WHEN...Until 3 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions and reduced visibility as low as one half mile at times. The hazardous conditions could impact the Tuesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. In Illinois, the latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. In Indiana, the latest road conditions for Indiana are available by calling 1-800-261-7623. && $$ ILZ003>005-091200- /O.CON.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ Winnebago-Boone-McHenry- Including the cities of Rockford, Belvidere, Crystal Lake, Algonquin, McHenry, and Woodstock 951 PM CST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST TUESDAY... * WHAT...Dangerously cold wind chills expected. Wind chills of 20 to 25 below zero, locally as cold as 30 below zero. * WHERE...Winnebago, Boone and McHenry Counties. * WHEN...From midnight tonight to 10 AM CST Tuesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
186 WWUS43 KLOT 090555 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 1155 PM CST Mon Feb 8 2021 ILZ019-091400- /O.EXT.KLOT.WW.Y.0006.000000T0000Z-210209T0900Z/ /O.CON.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ La Salle- Including the cities of Ottawa, Streator, La Salle, Mendota, and Marseilles 1155 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 3 AM CST TUESDAY... ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST TUESDAY... * WHAT...For the Winter Weather Advisory, accumulating snow and travel impacts expected. Additional snow accumulations up to an inch across southern sections of the county, for total accumulations up to three inches. For the Wind Chill Advisory, very cold wind chills expected overnight. Wind chills as low as 20 below zero. * WHERE...La Salle County. * WHEN...For the Winter Weather Advisory, until 3 AM CST Tuesday. For the Wind Chill Advisory, until 10 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions and reduced visibility under one mile at times. The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. The latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. && $$ ILZ021-107-108-INZ001-090900- /O.EXT.KLOT.WW.Y.0006.000000T0000Z-210209T0900Z/ Grundy-Southern Will-Eastern Will-Lake IN- Including the cities of Morris, Coal City, Minooka, Channahon, Manhattan, Wilmington, Crete, Peotone, Beecher, Gary, Hammond, and Merrillville 1155 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 3 AM CST TUESDAY... * WHAT...Accumulating snow and travel impacts expected. Total snow accumulations of one to three inches. * WHERE...Portions of northwest Indiana and northeast Illinois. * WHEN...Until 3 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions and reduced visibility as low as one half mile at times. The hazardous conditions will impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. In Illinois, the latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. In Indiana, the latest road conditions for Indiana are available by calling 1-800-261-7623. && $$ INZ002-090900- /O.CON.KLOT.WW.Y.0006.000000T0000Z-210209T0900Z/ Porter- Including the cities of Portage, Valparaiso, and Chesterton 1155 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST TUESDAY... * WHAT...Accumulating snow and travel impacts expected. Total snow accumulations of one to four inches. * WHERE...Porter County. * WHEN...Until 3 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions and reduced visibility as low as one half mile at times. The hazardous conditions could impact the Tuesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. In Illinois, the latest road conditions for Illinois can be obtained on the internet at www.gettingaroundillinois.com. In Indiana, the latest road conditions for Indiana are available by calling 1-800-261-7623. && $$ ILZ003>005-008-010>012-020-091400- /O.CON.KLOT.WC.Y.0002.210209T0600Z-210209T1600Z/ Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-Kane-Kendall- Including the cities of Rockford, Belvidere, Crystal Lake, Algonquin, McHenry, Woodstock, Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora, Elgin, Oswego, Yorkville, and Plano 1155 PM CST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST TUESDAY... * WHAT...Dangerously cold wind chills expected. Wind chills of 20 to 25 below zero, locally as cold as 30 below zero. * WHERE...Winnebago, Boone and McHenry Counties. * WHEN...From midnight tonight to 10 AM CST Tuesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
239 WWUS43 KLOT 090859 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 259 AM CST Tue Feb 9 2021 ILZ019-091600- /O.EXP.KLOT.WW.Y.0006.000000T0000Z-210209T0900Z/ /O.CON.KLOT.WC.Y.0002.000000T0000Z-210209T1600Z/ La Salle- Including the cities of Ottawa, Streator, La Salle, Mendota, and Marseilles 259 AM CST Tue Feb 9 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... ...WINTER WEATHER ADVISORY WILL EXPIRE AT 3 AM CST EARLY THIS MORNING... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...La Salle County. * WHEN...For the Winter Weather Advisory, until 3 AM CST Tuesday. For the Wind Chill Advisory, until 10 AM CST Tuesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ ILZ021-107-108-INZ001-002-091000- /O.EXP.KLOT.WW.Y.0006.000000T0000Z-210209T0900Z/ Grundy-Southern Will-Eastern Will-Lake IN-Porter- Including the cities of Morris, Coal City, Minooka, Channahon, Manhattan, Wilmington, Crete, Peotone, Beecher, Gary, Hammond, Merrillville, Portage, Valparaiso, and Chesterton 259 AM CST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 3 AM CST EARLY THIS MORNING... Light snow will gradually come to an end south of the Interstate 80 corridor early this morning, though with little additional accumulation. $$ ILZ003>005-008-010>012-020-091600- /O.CON.KLOT.WC.Y.0002.000000T0000Z-210209T1600Z/ Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-Kane-Kendall- Including the cities of Rockford, Belvidere, Crystal Lake, Algonquin, McHenry, Woodstock, Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora, Elgin, Oswego, Yorkville, and Plano 259 AM CST Tue Feb 9 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Dangerously cold wind chills expected. Wind chills of 20 to 25 below zero, locally as cold as 30 below zero. * WHERE...Winnebago, Boone and McHenry Counties. * WHEN...From midnight tonight to 10 AM CST Tuesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
709 WWUS43 KLOT 091546 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 946 AM CST Tue Feb 9 2021 ILZ003>005-008-010>012-019-020-091700- /O.EXP.KLOT.WC.Y.0002.000000T0000Z-210209T1600Z/ Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-Kane-La Salle-Kendall- Including the cities of Rockford, Belvidere, Crystal Lake, Algonquin, McHenry, Woodstock, Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora, Elgin, Ottawa, Streator, La Salle, Mendota, Marseilles, Oswego, Yorkville, and Plano 946 AM CST Tue Feb 9 2021 ...WIND CHILL ADVISORY WILL EXPIRE AT 10 AM CST THIS MORNING... Wind chill values have risen enough to reduce the risk of cold related health issues. However, the very cold conditions with sub-zero wind chills continue, so be sure to dress properly for cold weather when spending time outdoors. $$ Castro
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 8, 11:13 AM CST | Winter Weather Advisory | LOT | Cook, DeKalb, DuPage, Grundy, Kane, Kendall and 4 more | 16 hr |
Nearby
Wind Chill Advisories in Illinois, 2021Every wind chill advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.