IEM VTEC Product Browser
This application allows easy navigation of National Weather Service issued products with Valid Time Event Coding (VTEC).
13 Nov 2024 Update: The tool was updated to use non-hash link style URLs. A shim is in place to translate the old URLs to the new ones, so nothing should be broken (famous last words). This was done to allow the HTML5 History API to provide a better user experience.
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2025 [KLOT] CHICAGO Winter Weather (WW) Advisory (Y) Number 6
Listing of Counties/Parishes/Zones Included in Product
RADAR Composite at Issuance Time
Storm Based Warning History
900 WWUS43 KLOT 200503 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 1203 AM CDT Thu Mar 20 2025 ILZ013-019>021-023-032-104>108-INZ001-201200- /O.NEW.KLOT.WW.Y.0006.250320T0600Z-250320T1200Z/ DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Central Cook- Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Plano, Bolingbrook, Coal City, Oak Lawn, Ottawa, Bradley, Lemont, Chicago, Park Forest, Merrillville, Peotone, Kankakee, Dwight, Crete, Cicero, Hammond, Downers Grove, Mendota, La Salle, Orland Park, Carol Stream, Minooka, Wilmington, Lombard, Gary, Channahon, Bourbonnais, Streator, Wheaton, Joliet, Oak Forest, Manhattan, Marseilles, Calumet City, Beecher, Oswego, Pontiac, Plainfield, Fairbury, La Grange, Morris, Naperville, Mokena, Yorkville, and Oak Park 1203 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Accumulating heavy wet wind-whipped snow expected. Total snow accumulations 2 to 4 inches, with locally higher amounts possible. Winds gusting as high as 45 mph. * WHERE...Portions of central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...The snow is expected to fall at up to an inch per hour for a period overnight. While road temperatures remain above freezing, the heavy snow rates will allow for slushy accumulations on paved surfaces, with bridges and overpasses expected to be the most vulnerable to slushy accumulations. The combination of the heavy snow and strong wind gusts will also result in poor visibilities and hazardous travel conditions overnight. Conditions will improve around daybreak this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. The latest road conditions for Indiana can be obtained at https://511in.org. && $$ Birk
652 WWUS43 KLOT 200819 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 319 AM CDT Thu Mar 20 2025 ILZ010>012-103-201200- /O.EXA.KLOT.WW.Y.0006.000000T0000Z-250320T1200Z/ Lee-De Kalb-Kane-Northern Cook- Including the cities of Sycamore, Dixon, DeKalb, Elgin, Schaumburg, Northbrook, Des Plaines, Evanston, Aurora, and Palatine 319 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Snow. Additional snow accumulations up to two inches. Winds gusting as high as 40 mph. * WHERE...De Kalb, Lee, Kane, and Northern Cook Counties. * WHEN...Until 7 AM CDT this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute, though conditions will quickly improve after daybreak. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. && $$ ILZ013-019>021-023-032-104>108-INZ001-201200- /O.CON.KLOT.WW.Y.0006.000000T0000Z-250320T1200Z/ DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Central Cook- Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Cicero, Merrillville, Oswego, La Grange, Orland Park, Oak Lawn, Morris, Wheaton, Fairbury, Bourbonnais, Plainfield, Wilmington, Minooka, Mendota, La Salle, Yorkville, Coal City, Bradley, Bolingbrook, Park Forest, Carol Stream, Oak Forest, Naperville, Crete, Pontiac, Mokena, Streator, Gary, Dwight, Marseilles, Downers Grove, Calumet City, Plano, Lemont, Peotone, Channahon, Beecher, Ottawa, Kankakee, Oak Park, Manhattan, Hammond, Joliet, Chicago, and Lombard 319 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Snow. Additional snow accumulations up to 2 inches. Winds gusting as high as 40 mph. * WHERE...Portions of central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until 7 AM CDT this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute, though conditions will quickly improve after daybreak. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. The latest road conditions for Indiana can be obtained at https://511in.org. && $$ Birk
070 WWUS43 KLOT 201139 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 639 AM CDT Thu Mar 20 2025 ILZ010>013-019>021-023-032-103>108-INZ001-201245- /O.EXP.KLOT.WW.Y.0006.000000T0000Z-250320T1200Z/ Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee- Livingston-Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will-Lake IN- Including the cities of Kankakee, Orland Park, Bradley, Merrillville, Pontiac, Chicago, Joliet, Northbrook, Bourbonnais, Oswego, Morris, Wheaton, Fairbury, Carol Stream, Peotone, Park Forest, Gary, Lemont, La Salle, Palatine, Mendota, Yorkville, Oak Park, Dixon, Channahon, Evanston, Manhattan, Beecher, Crete, Plano, Ottawa, Dwight, Streator, Downers Grove, Calumet City, Aurora, Mokena, Naperville, Cicero, Plainfield, La Grange, Oak Lawn, Des Plaines, Hammond, Bolingbrook, DeKalb, Lombard, Marseilles, Minooka, Elgin, Coal City, Schaumburg, Oak Forest, Sycamore, and Wilmington 639 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 7 AM CDT THIS MORNING... The threat has ended, therefore the advisory will be allowed to expire. Be cautious of residually slick travel conditions this morning. $$ Doom
Permalink to 202503200503-KLOT-WWUS43-WSWLOT
900 WWUS43 KLOT 200503 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 1203 AM CDT Thu Mar 20 2025 ILZ013-019>021-023-032-104>108-INZ001-201200- /O.NEW.KLOT.WW.Y.0006.250320T0600Z-250320T1200Z/ DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Central Cook- Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Plano, Bolingbrook, Coal City, Oak Lawn, Ottawa, Bradley, Lemont, Chicago, Park Forest, Merrillville, Peotone, Kankakee, Dwight, Crete, Cicero, Hammond, Downers Grove, Mendota, La Salle, Orland Park, Carol Stream, Minooka, Wilmington, Lombard, Gary, Channahon, Bourbonnais, Streator, Wheaton, Joliet, Oak Forest, Manhattan, Marseilles, Calumet City, Beecher, Oswego, Pontiac, Plainfield, Fairbury, La Grange, Morris, Naperville, Mokena, Yorkville, and Oak Park 1203 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Accumulating heavy wet wind-whipped snow expected. Total snow accumulations 2 to 4 inches, with locally higher amounts possible. Winds gusting as high as 45 mph. * WHERE...Portions of central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...The snow is expected to fall at up to an inch per hour for a period overnight. While road temperatures remain above freezing, the heavy snow rates will allow for slushy accumulations on paved surfaces, with bridges and overpasses expected to be the most vulnerable to slushy accumulations. The combination of the heavy snow and strong wind gusts will also result in poor visibilities and hazardous travel conditions overnight. Conditions will improve around daybreak this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. The latest road conditions for Indiana can be obtained at https://511in.org. && $$ Birk
Permalink to 202503200819-KLOT-WWUS43-WSWLOT
652 WWUS43 KLOT 200819 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 319 AM CDT Thu Mar 20 2025 ILZ010>012-103-201200- /O.EXA.KLOT.WW.Y.0006.000000T0000Z-250320T1200Z/ Lee-De Kalb-Kane-Northern Cook- Including the cities of Sycamore, Dixon, DeKalb, Elgin, Schaumburg, Northbrook, Des Plaines, Evanston, Aurora, and Palatine 319 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Snow. Additional snow accumulations up to two inches. Winds gusting as high as 40 mph. * WHERE...De Kalb, Lee, Kane, and Northern Cook Counties. * WHEN...Until 7 AM CDT this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute, though conditions will quickly improve after daybreak. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. && $$ ILZ013-019>021-023-032-104>108-INZ001-201200- /O.CON.KLOT.WW.Y.0006.000000T0000Z-250320T1200Z/ DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Central Cook- Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Cicero, Merrillville, Oswego, La Grange, Orland Park, Oak Lawn, Morris, Wheaton, Fairbury, Bourbonnais, Plainfield, Wilmington, Minooka, Mendota, La Salle, Yorkville, Coal City, Bradley, Bolingbrook, Park Forest, Carol Stream, Oak Forest, Naperville, Crete, Pontiac, Mokena, Streator, Gary, Dwight, Marseilles, Downers Grove, Calumet City, Plano, Lemont, Peotone, Channahon, Beecher, Ottawa, Kankakee, Oak Park, Manhattan, Hammond, Joliet, Chicago, and Lombard 319 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Snow. Additional snow accumulations up to 2 inches. Winds gusting as high as 40 mph. * WHERE...Portions of central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until 7 AM CDT this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute, though conditions will quickly improve after daybreak. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. The latest road conditions for Indiana can be obtained at https://511in.org. && $$ Birk
Permalink to 202503201139-KLOT-WWUS43-WSWLOT
070 WWUS43 KLOT 201139 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 639 AM CDT Thu Mar 20 2025 ILZ010>013-019>021-023-032-103>108-INZ001-201245- /O.EXP.KLOT.WW.Y.0006.000000T0000Z-250320T1200Z/ Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee- Livingston-Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will-Lake IN- Including the cities of Kankakee, Orland Park, Bradley, Merrillville, Pontiac, Chicago, Joliet, Northbrook, Bourbonnais, Oswego, Morris, Wheaton, Fairbury, Carol Stream, Peotone, Park Forest, Gary, Lemont, La Salle, Palatine, Mendota, Yorkville, Oak Park, Dixon, Channahon, Evanston, Manhattan, Beecher, Crete, Plano, Ottawa, Dwight, Streator, Downers Grove, Calumet City, Aurora, Mokena, Naperville, Cicero, Plainfield, La Grange, Oak Lawn, Des Plaines, Hammond, Bolingbrook, DeKalb, Lombard, Marseilles, Minooka, Elgin, Coal City, Schaumburg, Oak Forest, Sycamore, and Wilmington 639 AM CDT Thu Mar 20 2025 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 7 AM CDT THIS MORNING... The threat has ended, therefore the advisory will be allowed to expire. Be cautious of residually slick travel conditions this morning. $$ Doom
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Storm Reports within Product Polygon
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