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 Dense Fog (FG) Advisory (Y) Number 2
Listing of Counties/Parishes/Zones Included in Product
RADAR Composite at Issuance Time
Storm Based Warning History
330 WWUS73 KLOT 270635 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1235 AM CST Thu Feb 27 2025 ILZ003>005-008-010>012-271000- /O.NEW.KLOT.FG.Y.0002.250227T0635Z-250227T1000Z/ Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-Kane- Including the cities of Crystal Lake, Belvidere, DeKalb, Oregon, Rockford, Algonquin, Byron, Dixon, Aurora, Woodstock, Rochelle, Sycamore, Elgin, and McHenry 1235 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CST EARLY THIS MORNING... * WHAT...Visibility as low as one quarter mile in areas of dense fog. * WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties. * WHEN...Until 4 AM CST early this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Carlaw
770 WWUS73 KLOT 270932 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 332 AM CST Thu Feb 27 2025 ILZ003-008-010-271045- /O.EXP.KLOT.FG.Y.0002.000000T0000Z-250227T1000Z/ Winnebago-Ogle-Lee- Including the cities of Oregon, Rockford, Dixon, Byron, and Rochelle 332 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY WILL EXPIRE AT 4 AM CST EARLY THIS MORNING... While ares of dense fog remain, mainly east of I-39, visibilities will be improving shortly. $$ ILZ006-013-020-021-103>108-INZ001-271300- /O.EXB.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Lake IL-DuPage-Kendall-Grundy-Northern Cook-Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Peotone, Plainfield, Palatine, La Grange, Mokena, Downers Grove, Merrillville, Buffalo Grove, Plano, Naperville, Schaumburg, Gary, Wheaton, Oak Forest, Lombard, Gurnee, Orland Park, Minooka, Mundelein, Beecher, Carol Stream, Wilmington, Bolingbrook, Hammond, Yorkville, Evanston, Des Plaines, Crete, Morris, Joliet, Northbrook, Waukegan, Oswego, Park Forest, Oak Lawn, Cicero, Chicago, Lemont, Manhattan, Channahon, Calumet City, Oak Park, and Coal City 332 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Illinois, Central Cook, DuPage, Eastern Will, Grundy, Kendall, Lake IL, Northern Cook, Northern Will, Southern Cook, and Southern Will Counties. In Indiana, Lake IN County. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ ILZ004-005-011-012-271300- /O.EXT.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Boone-McHenry-De Kalb-Kane- Including the cities of Crystal Lake, Belvidere, DeKalb, Algonquin, Aurora, Woodstock, Sycamore, Elgin, and McHenry 332 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Boone, De Kalb, Kane, and McHenry Counties. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Carlaw
181 WWUS73 KLOT 271155 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 555 AM CST Thu Feb 27 2025 ILZ004>006-011-103-271300- /O.CAN.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Boone-McHenry-Lake IL-De Kalb-Northern Cook- Including the cities of Buffalo Grove, Palatine, Crystal Lake, Evanston, Belvidere, DeKalb, Gurnee, Des Plaines, Mundelein, Algonquin, Northbrook, Waukegan, Woodstock, Schaumburg, Sycamore, and McHenry 555 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY IS CANCELLED... Visibilities will continue to improve. $$ ILZ012-013-020-021-104>108-INZ001-271300- /O.CON.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Kane-DuPage-Kendall-Grundy-Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Peotone, Plainfield, La Grange, Mokena, Downers Grove, Merrillville, Plano, Naperville, Gary, Wheaton, Elgin, Oak Forest, Lombard, Orland Park, Beecher, Minooka, Carol Stream, Wilmington, Bolingbrook, Hammond, Yorkville, Crete, Morris, Joliet, Park Forest, Oswego, Oak Lawn, Cicero, Chicago, Lemont, Manhattan, Aurora, Channahon, Calumet City, Oak Park, and Coal City 555 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...In Illinois, Central Cook, DuPage, Eastern Will, Grundy, Kane, Kendall, Northern Will, Southern Cook, and Southern Will Counties. In Indiana, Lake IN County. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Carlaw
903 WWUS73 KLOT 271247 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 647 AM CST Thu Feb 27 2025 ILZ012-013-020-021-104>108-INZ001-271400- /O.EXP.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Kane-DuPage-Kendall-Grundy-Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Downers Grove, Oak Forest, Bolingbrook, Manhattan, Cicero, Minooka, Oswego, Chicago, Crete, Channahon, Lombard, Oak Lawn, Merrillville, Orland Park, Joliet, Wheaton, Peotone, Plano, Mokena, Yorkville, Calumet City, Gary, Elgin, Carol Stream, Aurora, Lemont, Morris, Plainfield, Hammond, Oak Park, Naperville, Wilmington, Coal City, Park Forest, La Grange, and Beecher 647 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY WILL EXPIRE AT 7 AM CST THIS MORNING... Visibility continues to improve for much of the area this morning. Locations where dense fog continues should see rapid improvement over the next hour. $$ Kluber
Permalink to 202502270635-KLOT-WWUS73-NPWLOT
330 WWUS73 KLOT 270635 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1235 AM CST Thu Feb 27 2025 ILZ003>005-008-010>012-271000- /O.NEW.KLOT.FG.Y.0002.250227T0635Z-250227T1000Z/ Winnebago-Boone-McHenry-Ogle-Lee-De Kalb-Kane- Including the cities of Crystal Lake, Belvidere, DeKalb, Oregon, Rockford, Algonquin, Byron, Dixon, Aurora, Woodstock, Rochelle, Sycamore, Elgin, and McHenry 1235 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CST EARLY THIS MORNING... * WHAT...Visibility as low as one quarter mile in areas of dense fog. * WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, and McHenry Counties. * WHEN...Until 4 AM CST early this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Carlaw
Permalink to 202502270932-KLOT-WWUS73-NPWLOT
770 WWUS73 KLOT 270932 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 332 AM CST Thu Feb 27 2025 ILZ003-008-010-271045- /O.EXP.KLOT.FG.Y.0002.000000T0000Z-250227T1000Z/ Winnebago-Ogle-Lee- Including the cities of Oregon, Rockford, Dixon, Byron, and Rochelle 332 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY WILL EXPIRE AT 4 AM CST EARLY THIS MORNING... While ares of dense fog remain, mainly east of I-39, visibilities will be improving shortly. $$ ILZ006-013-020-021-103>108-INZ001-271300- /O.EXB.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Lake IL-DuPage-Kendall-Grundy-Northern Cook-Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Peotone, Plainfield, Palatine, La Grange, Mokena, Downers Grove, Merrillville, Buffalo Grove, Plano, Naperville, Schaumburg, Gary, Wheaton, Oak Forest, Lombard, Gurnee, Orland Park, Minooka, Mundelein, Beecher, Carol Stream, Wilmington, Bolingbrook, Hammond, Yorkville, Evanston, Des Plaines, Crete, Morris, Joliet, Northbrook, Waukegan, Oswego, Park Forest, Oak Lawn, Cicero, Chicago, Lemont, Manhattan, Channahon, Calumet City, Oak Park, and Coal City 332 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Illinois, Central Cook, DuPage, Eastern Will, Grundy, Kendall, Lake IL, Northern Cook, Northern Will, Southern Cook, and Southern Will Counties. In Indiana, Lake IN County. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ ILZ004-005-011-012-271300- /O.EXT.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Boone-McHenry-De Kalb-Kane- Including the cities of Crystal Lake, Belvidere, DeKalb, Algonquin, Aurora, Woodstock, Sycamore, Elgin, and McHenry 332 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Boone, De Kalb, Kane, and McHenry Counties. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Carlaw
Permalink to 202502271155-KLOT-WWUS73-NPWLOT
181 WWUS73 KLOT 271155 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 555 AM CST Thu Feb 27 2025 ILZ004>006-011-103-271300- /O.CAN.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Boone-McHenry-Lake IL-De Kalb-Northern Cook- Including the cities of Buffalo Grove, Palatine, Crystal Lake, Evanston, Belvidere, DeKalb, Gurnee, Des Plaines, Mundelein, Algonquin, Northbrook, Waukegan, Woodstock, Schaumburg, Sycamore, and McHenry 555 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY IS CANCELLED... Visibilities will continue to improve. $$ ILZ012-013-020-021-104>108-INZ001-271300- /O.CON.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Kane-DuPage-Kendall-Grundy-Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Peotone, Plainfield, La Grange, Mokena, Downers Grove, Merrillville, Plano, Naperville, Gary, Wheaton, Elgin, Oak Forest, Lombard, Orland Park, Beecher, Minooka, Carol Stream, Wilmington, Bolingbrook, Hammond, Yorkville, Crete, Morris, Joliet, Park Forest, Oswego, Oak Lawn, Cicero, Chicago, Lemont, Manhattan, Aurora, Channahon, Calumet City, Oak Park, and Coal City 555 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM CST THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...In Illinois, Central Cook, DuPage, Eastern Will, Grundy, Kane, Kendall, Northern Will, Southern Cook, and Southern Will Counties. In Indiana, Lake IN County. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Carlaw
Permalink to 202502271247-KLOT-WWUS73-NPWLOT
903 WWUS73 KLOT 271247 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 647 AM CST Thu Feb 27 2025 ILZ012-013-020-021-104>108-INZ001-271400- /O.EXP.KLOT.FG.Y.0002.000000T0000Z-250227T1300Z/ Kane-DuPage-Kendall-Grundy-Central Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN- Including the cities of Downers Grove, Oak Forest, Bolingbrook, Manhattan, Cicero, Minooka, Oswego, Chicago, Crete, Channahon, Lombard, Oak Lawn, Merrillville, Orland Park, Joliet, Wheaton, Peotone, Plano, Mokena, Yorkville, Calumet City, Gary, Elgin, Carol Stream, Aurora, Lemont, Morris, Plainfield, Hammond, Oak Park, Naperville, Wilmington, Coal City, Park Forest, La Grange, and Beecher 647 AM CST Thu Feb 27 2025 ...DENSE FOG ADVISORY WILL EXPIRE AT 7 AM CST THIS MORNING... Visibility continues to improve for much of the area this morning. Locations where dense fog continues should see rapid improvement over the next hour. $$ Kluber
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