Alert archive / Illinois / Vermilion County

Weather alerts in Vermilion County, Illinois, 2021

113 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Vermilion County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
113
Warnings
22
Watches
12
Advisories
39
Busiest month
June27 alerts
Busiest day
June 26, 20217 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

0 of 1 tornado warnings covering Vermilion County in 2021 had a tornado report inside them.

Vermilion County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings12467%850%10 min
Flash flood warnings30100%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Lincoln, IL: tornado warnings541572%4751%17 min
NWS Lincoln, IL: severe thunderstorm warnings1304962%21354%22 min
NWS Lincoln, IL: flash flood warnings371462%3284%93 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 1, 6:35 AM CSTMesoscale DiscussionSPC4 hr
Jan 3, 1:35 AM CSTWinter Weather AdvisoryILX4 hr
Jan 3, 2:38 PM CSTDense Fog AdvisoryILX32 hr
Jan 5, 3:27 PM CSTDense Fog AdvisoryILX17 hr
Jan 24, 3:06 PM CSTWinter Weather AdvisoryILX21 hr
Jan 25, 11:47 AM CSTWinter Weather AdvisoryILX24 hr
Jan 29, 2:48 PM CSTWinter Weather AdvisoryILX48 hr
Feb 4, 7:32 PM CSTWind AdvisoryILX4 hr
Feb 5, 2:01 PM CSTWind Chill AdvisoryILX45 hr
Feb 5, 2:01 PM CSTWinter Weather AdvisoryILX33 hr
Feb 13, 3:15 AM CSTWind Chill AdvisoryILX57 hr
Feb 13, 3:10 PM CSTWinter Weather AdvisoryILX60 hr
Feb 14, 2:38 AM CSTWinter Storm WarningILX48 hr
Feb 15, 10:44 AM CSTMesoscale DiscussionSPC6 hr
Feb 15, 2:52 PM CSTMesoscale DiscussionSPC6 hr
Mar 10, 3:08 AM CSTWind AdvisoryILX21 hr
Mar 16, 12:22 AM CDTDense Fog AdvisoryILX10 hr
Mar 17, 3:16 PM CDTWind AdvisoryILX28 hr
Mar 25, 3:03 AM CDTWind AdvisoryILX22 hr
Apr 14, 2:36 PM CDTFrost AdvisoryILX17 hr
Apr 19, 2:27 AM CDTFreeze WatchILX12 hr
Apr 19, 2:27 PM CDTFreeze WarningILX43 hr
Apr 21, 2:58 AM CDTFreeze WarningILX29 hr
May 3, 2:47 PM CDTSevere Thunderstorm WatchSPC6 hr
May 6, 1:10 PM CDTMesoscale DiscussionSPC2 hr
May 7, 2:08 PM CDTFrost AdvisoryILX18 hr
May 9, 2:48 PM CDTFrost AdvisoryILX16 hr
May 11, 2:34 PM CDTFrost AdvisoryILX16 hr
May 27, 11:26 AM CDTSevere Thunderstorm WatchSPC8 hr
Jun 12, 1:26 PM CDTMesoscale DiscussionSPC3 hr
Jun 12, 5:56 PM CDTSevere Thunderstorm WarningILX33 min
Jun 12, 6:11 PM CDTSevere Thunderstorm WarningILX18 min
Jun 12, 6:21 PM CDTFlash Flood WarningILX78 min
Jun 17, 2:45 PM CDTHeat AdvisoryILX28 hr
Jun 18, 12:52 PM CDTMesoscale DiscussionSPC83 min
Jun 18, 9:20 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 19, 2:10 AM CDTMesoscale DiscussionSPC2 hr
Jun 19, 3:29 AM CDTFlash Flood WarningILX3 hr
Jun 19, 3:37 AM CDTSpecial Weather StatementILX53 min
Jun 20, 10:57 AM CDTMesoscale DiscussionSPC2 hr
Jun 20, 3:25 PM CDTMesoscale DiscussionSPC2 hr
Jun 24, 2:28 PM CDTFlash Flood WatchILX54 hr
Jun 25, 5:06 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 25, 7:05 PM CDTMesoscale DiscussionSPC55 min
Jun 25, 8:34 PM CDTMesoscale DiscussionSPC86 min
Jun 25, 10:31 PM CDTMesoscale DiscussionSPC59 min
Jun 26, 12:05 PM CDTTornado WatchSPC9 hr
Jun 26, 5:50 PM CDTSevere Thunderstorm WarningILX40 min
Jun 26, 6:08 PM CDTMesoscale DiscussionSPC67 min
Jun 26, 6:24 PM CDTSevere Thunderstorm WarningILX81 min
Jun 26, 8:23 PM CDTMesoscale DiscussionSPC67 min
Jun 27, 11:36 AM CDTMesoscale DiscussionSPC2 hr
Jun 28, 7:58 PM CDTRiver Flood WarningILX13 hr
Jun 29, 11:54 AM CDTMesoscale DiscussionSPC2 hr
Jun 29, 1:58 PM CDTSevere Thunderstorm WarningILX47 min
Jun 29, 2:41 PM CDTSevere Thunderstorm WarningILX38 min
Jul 11, 7:00 PM CDTAreal Flood AdvisoryILX5 hr
Jul 11, 9:31 PM CDTFlash Flood WarningILX3 hr
Jul 12, 1:13 PM CDTMesoscale DiscussionSPC92 min
Jul 15, 1:39 PM CDTMesoscale DiscussionSPC2 hr
Jul 18, 7:11 AM CDTDense Fog AdvisoryILX3 hr
Jul 24, 7:31 PM CDTMesoscale DiscussionSPC119 min
Jul 24, 8:36 PM CDTSevere Thunderstorm WarningILX39 min
Jul 24, 9:45 PM CDTSpecial Weather StatementILX30 min
Jul 27, 2:06 AM CDTHeat AdvisoryILX66 hr
Jul 29, 2:19 PM CDTMesoscale DiscussionSPC116 min
Aug 9, 1:54 PM CDTHeat AdvisoryILX29 hr
Aug 10, 3:49 PM CDTHeat AdvisoryILX27 hr
Aug 11, 1:20 AM CDTMesoscale DiscussionSPC115 min
Aug 12, 2:45 AM CDTHeat AdvisoryILX15 hr
Aug 12, 1:05 PM CDTSpecial Weather StatementILX40 min
Aug 12, 2:22 PM CDTMesoscale DiscussionSPC83 min
Aug 12, 2:53 PM CDTSevere Thunderstorm WarningILX37 min
Aug 18, 2:45 PM CDTSpecial Weather StatementILX45 min
Aug 22, 2:45 AM CDTDense Fog AdvisoryILX6 hr
Aug 23, 3:51 AM CDTDense Fog AdvisoryILX4 hr
Aug 23, 2:53 PM CDTHeat AdvisoryILX5 days
Aug 24, 10:36 PM CDTSpecial Weather StatementILX54 min
Aug 25, 4:02 PM CDTMesoscale DiscussionSPC88 min
Aug 25, 4:33 PM CDTSpecial Weather StatementILX42 min
Aug 30, 12:53 PM CDTAreal Flood AdvisoryILX3 hr
Sep 7, 1:12 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 7, 5:25 PM CDTMesoscale DiscussionSPC95 min
Sep 7, 6:09 PM CDTSevere Thunderstorm WarningILX51 min
Sep 7, 8:08 PM CDTSpecial Weather StatementILX37 min
Sep 14, 3:18 PM CDTMesoscale DiscussionSPC117 min
Oct 7, 5:53 PM CDTAreal Flood AdvisoryILX2 hr
Oct 7, 8:41 PM CDTDense Fog AdvisoryILX13 hr
Oct 11, 3:10 PM CDTTornado WatchSPC6 hr
Oct 11, 6:09 PM CDTMesoscale DiscussionSPC96 min
Oct 11, 6:52 PM CDTSpecial Weather StatementILX83 min
Oct 23, 12:50 PM CDTFlash Flood WatchILX56 hr
Oct 24, 5:11 PM CDTMesoscale DiscussionSPC3 hr
Oct 24, 5:44 PM CDTTornado WatchSPC7 hr
Oct 24, 6:26 PM CDTSevere Thunderstorm WarningILX34 min
Oct 24, 7:38 PM CDTSpecial Weather StatementILX37 min
Oct 24, 8:04 PM CDTSpecial Weather StatementILX41 min
Oct 24, 9:25 PM CDTSpecial Weather StatementILX65 min
Oct 25, 3:18 AM CDTWind AdvisoryILX10 hr
Oct 26, 7:06 PM CDTFrost AdvisoryILX14 hr
Nov 1, 2:41 PM CDTFreeze WarningILX18 hr
Nov 10, 2:35 AM CSTDense Fog AdvisoryILX6 hr
Dec 10, 12:19 AM CSTDense Fog AdvisoryILX11 hr
Dec 10, 2:57 AM CSTWind AdvisoryILX36 hr
Dec 10, 7:18 PM CSTMesoscale DiscussionSPC87 min
Dec 10, 7:47 PM CSTTornado WatchSPC8 hr
Dec 10, 8:53 PM CSTMesoscale DiscussionSPC97 min
Dec 10, 9:33 PM CSTSevere Thunderstorm WarningILX42 min
Dec 10, 10:24 PM CSTSevere Thunderstorm WarningILX35 min
Dec 10, 10:26 PM CSTTornado Warning Tornado observedILX19 min
Dec 14, 2:47 PM CSTWind AdvisoryILX37 hr
Dec 15, 8:27 PM CSTHigh Wind WarningILX7 hr
Dec 30, 9:28 PM CSTDense Fog AdvisoryILX13 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20202022

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.