Alert archive / Illinois / Vermilion County

Weather alerts in Vermilion County, Illinois, 2023

98 weather alerts in 2023, 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 2023. Tap one for its archive.

Alerts
98
Warnings
22
Watches
14
Advisories
30
Busiest month
April19 alerts
Busiest day
June 29, 20237 alerts

Over time

By month

Warning verification

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

1 of 1 tornado warnings covering Vermilion County in 2023 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 17 minutes after it went out.

Vermilion County, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings110%367%17 min
Severe thunderstorm warnings13746%3194%16 min
Flash flood warnings00

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Lincoln, IL: tornado warnings502648%8371%15 min
NWS Lincoln, IL: severe thunderstorm warnings25612750%61986%21 min
NWS Lincoln, IL: flash flood warnings19953%1883%95 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, 11:46 PM CSTDense Fog AdvisoryILX15 hr
Jan 2, 3:33 PM CSTDense Fog AdvisoryILX8 hr
Jan 3, 2:06 PM CSTMesoscale DiscussionSPC2 hr
Jan 11, 9:30 PM CSTDense Fog AdvisoryILX6 hr
Jan 19, 4:44 AM CSTDense Fog AdvisoryILX4 hr
Jan 23, 3:20 AM CSTWinter Storm WatchILX22 hr
Jan 24, 1:29 AM CSTWinter Storm WarningILX35 hr
Jan 29, 1:54 PM CSTWinter Weather AdvisoryILX21 hr
Feb 7, 1:55 PM CSTHigh Wind WatchILX24 hr
Feb 8, 1:54 PM CSTWind AdvisoryILX28 hr
Feb 9, 5:48 AM CSTSpecial Weather StatementILX27 min
Feb 13, 2:04 PM CSTWind AdvisoryILX43 hr
Feb 22, 10:59 AM CSTMesoscale DiscussionSPC91 min
Feb 22, 12:20 PM CSTTornado WatchSPC5 hr
Feb 22, 2:27 PM CSTMesoscale DiscussionSPC2 hr
Feb 24, 2:52 PM CSTWinter Weather AdvisoryILX14 hr
Feb 26, 2:24 AM CSTWind AdvisoryILX40 hr
Feb 27, 8:46 AM CSTMesoscale DiscussionSPC89 min
Feb 27, 9:44 AM CSTMesoscale DiscussionSPC61 min
Feb 27, 10:06 AM CSTTornado WatchSPC5 hr
Feb 27, 10:12 AM CSTSevere Thunderstorm WarningILX41 min
Mar 2, 3:10 AM CSTWind AdvisoryILX38 hr
Mar 2, 8:30 PM CSTWinter Weather AdvisoryILX22 hr
Mar 3, 12:24 PM CSTHigh Wind WarningILX7 hr
Mar 5, 12:22 AM CSTDense Fog AdvisoryILX8 hr
Mar 26, 1:41 PM CDTMesoscale DiscussionSPC2 hr
Mar 31, 3:00 AM CDTWind AdvisoryILX34 hr
Mar 31, 6:20 PM CDTMesoscale DiscussionSPC115 min
Mar 31, 6:59 PM CDTTornado WatchSPC7 hr
Mar 31, 7:44 PM CDTTornado Warning Tornado observedConsiderable damage threatILX31 min
Mar 31, 7:54 PM CDTMesoscale DiscussionSPC2 hr
Mar 31, 8:10 PM CDTSevere Thunderstorm WarningILX50 min
Mar 31, 8:27 PM CDTSevere Thunderstorm WarningILX33 min
Mar 31, 8:42 PM CDTSevere Thunderstorm Warning Considerable damage threatILX33 min
Mar 31, 9:31 PM CDTMesoscale DiscussionSPC119 min
Apr 4, 1:27 PM CDTWind AdvisoryILX27 hr
Apr 5, 3:27 AM CDTMesoscale DiscussionSPC93 min
Apr 5, 3:57 AM CDTSevere Thunderstorm WatchSPC8 hr
Apr 15, 10:18 PM CDTSpecial Weather StatementILX27 min
Apr 15, 10:34 PM CDTSpecial Weather StatementILX26 min
Apr 17, 2:00 AM CDTFrost AdvisoryILX30 hr
Apr 17, 3:13 PM CDTFreeze WarningILX17 hr
Apr 20, 1:49 AM CDTWind AdvisoryILX15 hr
Apr 20, 5:23 PM CDTMesoscale DiscussionSPC97 min
Apr 22, 2:30 PM CDTFreeze WatchILX12 hr
Apr 23, 2:46 AM CDTFreeze WarningILX29 hr
Apr 25, 1:47 PM CDTFrost AdvisoryILX18 hr
Apr 26, 2:33 PM CDTFrost AdvisoryILX17 hr
May 7, 1:32 AM CDTSpecial Weather StatementILX28 min
May 7, 1:55 AM CDTSpecial Weather StatementILX35 min
May 7, 10:02 PM CDTSpecial Weather StatementILX43 min
Jun 29, 3:08 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 29, 6:06 AM CDTMesoscale DiscussionSPC84 min
Jun 29, 6:55 AM CDTSevere Thunderstorm Warning Considerable damage threatILX37 min
Jun 29, 10:34 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 29, 12:41 PM CDTMesoscale DiscussionSPC2 hr
Jun 29, 12:51 PM CDTSevere Thunderstorm Warning Destructive damage threatILX39 min
Jun 29, 1:27 PM CDTSevere Thunderstorm Warning Destructive damage threatILX48 min
Jun 30, 3:39 AM CDTDense Fog AdvisoryILX5 hr
Jun 30, 1:35 PM CDTSpecial Weather StatementILX25 min
Jul 8, 3:36 AM CDTAreal Flood AdvisoryILX3 hr
Jul 14, 11:49 PM CDTSpecial Weather StatementILX26 min
Jul 17, 2:31 PM CDTSpecial Weather StatementILX29 min
Jul 17, 2:57 PM CDTSevere Thunderstorm WarningILX33 min
Jul 17, 3:31 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 17, 3:32 PM CDTSpecial Weather StatementILX28 min
Jul 17, 4:03 PM CDTSpecial Weather StatementILX27 min
Jul 17, 4:24 PM CDTSpecial Weather StatementILX36 min
Jul 17, 4:41 PM CDTSevere Thunderstorm WarningILX34 min
Jul 20, 1:15 PM CDTMesoscale DiscussionSPC90 min
Jul 20, 1:45 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 20, 2:05 PM CDTSevere Thunderstorm WarningILX25 min
Jul 25, 2:21 PM CDTHeat AdvisoryILX37 hr
Jul 25, 9:48 PM CDTMesoscale DiscussionSPC87 min
Jul 27, 3:06 AM CDTExcessive Heat WarningILX42 hr
Jul 27, 3:06 AM CDTHeat AdvisoryILX64 hr
Jul 28, 5:23 AM CDTSevere Thunderstorm WarningILX25 min
Aug 5, 1:45 PM CDTMesoscale DiscussionSPC3 hr
Aug 9, 10:42 AM CDTFlood WatchILX11 hr
Aug 9, 12:18 PM CDTMesoscale DiscussionSPC2 hr
Aug 9, 2:32 PM CDTAreal Flood AdvisoryILX5 hr
Aug 10, 1:11 AM CDTDense Fog AdvisoryILX8 hr
Aug 12, 1:42 AM CDTSevere Thunderstorm WatchSPC5 hr
Aug 14, 11:13 AM CDTMesoscale DiscussionSPC2 hr
Aug 19, 2:38 AM CDTExcessive Heat WarningILX7 days
Aug 25, 7:09 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 25, 9:52 PM CDTSevere Thunderstorm WarningILX53 min
Aug 25, 10:00 PM CDTSevere Thunderstorm WarningILX45 min
Aug 25, 10:16 PM CDTMesoscale DiscussionSPC119 min
Sep 26, 2:02 PM CDTMesoscale DiscussionSPC88 min
Sep 28, 3:21 AM CDTDense Fog AdvisoryILX6 hr
Sep 28, 10:44 PM CDTDense Fog AdvisoryILX10 hr
Oct 9, 2:17 PM CDTFrost AdvisoryILX18 hr
Oct 29, 3:04 AM CDTFreeze WarningILX29 hr
Oct 30, 2:27 AM CDTFreeze WarningILX31 hr
Nov 5, 12:46 AM CDTDense Fog AdvisoryILX10 hr
Dec 23, 6:31 PM CSTDense Fog AdvisoryILX17 hr
Dec 30, 7:40 PM CSTWinter Weather AdvisoryILX15 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 archive20222024

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.