Alert archive / Illinois / Montgomery County

Weather alerts in Montgomery County, Illinois, 2022

92 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Montgomery County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts
92
Warnings
28
Watches
17
Advisories
23
Busiest month
August18 alerts
Busiest day
August 3, 20229 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 Montgomery County in 2022 had a tornado report inside them.

Montgomery County, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings16850%2090%15 min
Flash flood warnings330%3100%59 min

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS St. Louis, MO: tornado warnings10280%1050%9 min
NWS St. Louis, MO: severe thunderstorm warnings1738849%34381%21 min
NWS St. Louis, MO: flash flood warnings402050%9591%130 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 7, 5:52 PM CSTWinter Weather AdvisoryLSX27 hr
Jan 14, 2:58 AM CSTWinter Weather AdvisoryLSX39 hr
Jan 31, 2:49 AM CSTWinter Storm WatchLSX24 hr
Feb 1, 2:41 AM CSTWinter Storm WarningLSX69 hr
Feb 2, 1:44 AM CSTMesoscale DiscussionSPC6 hr
Feb 2, 7:11 AM CSTMesoscale DiscussionSPC5 hr
Feb 15, 2:48 PM CSTFlood WatchLSX48 hr
Feb 16, 1:38 PM CSTWinter Weather AdvisoryLSX30 hr
Feb 22, 2:21 PM CSTWinter Weather AdvisoryLSX58 hr
Mar 5, 10:32 PM CSTSevere Thunderstorm WarningLSX43 min
Mar 5, 11:24 PM CSTSevere Thunderstorm WarningLSX27 min
Mar 9, 2:21 PM CSTWinter Weather AdvisoryLSX52 hr
Mar 29, 2:17 PM CDTWind AdvisoryLSX24 hr
Mar 30, 9:03 AM CDTMesoscale DiscussionSPC117 min
Apr 8, 3:35 AM CDTFreeze WarningLSX28 hr
Apr 17, 2:27 PM CDTFreeze WatchLSX13 hr
Apr 18, 3:12 AM CDTFreeze WarningLSX30 hr
Apr 24, 10:56 AM CDTMesoscale DiscussionSPC2 hr
Apr 24, 12:29 PM CDTSevere Thunderstorm WarningLSX16 min
Apr 24, 12:46 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 24, 2:58 PM CDTMesoscale DiscussionSPC92 min
Apr 25, 2:40 AM CDTFrost AdvisoryLSX29 hr
Apr 26, 5:03 PM CDTFrost AdvisoryLSX13 hr
Apr 30, 2:03 PM CDTTornado WatchSPC8 hr
Apr 30, 6:13 PM CDTSevere Thunderstorm WarningLSX17 min
Apr 30, 6:43 PM CDTSevere Thunderstorm WarningLSX32 min
May 15, 2:03 PM CDTMesoscale DiscussionSPC117 min
May 19, 10:05 AM CDTMesoscale DiscussionSPC2 hr
May 19, 1:03 PM CDTSevere Thunderstorm WarningLSX42 min
May 19, 6:17 PM CDTSevere Thunderstorm WarningLSX26 min
May 19, 6:28 PM CDTTornado WarningLSX24 min
May 26, 9:52 AM CDTMesoscale DiscussionSPC83 min
Jun 12, 10:14 AM CDTSevere Thunderstorm WarningLSX46 min
Jun 12, 10:15 AM CDTMesoscale DiscussionSPC2 hr
Jun 12, 10:43 AM CDTSevere Thunderstorm WarningLSX47 min
Jun 12, 2:52 PM CDTHeat AdvisoryLSX5 days
Jun 13, 2:58 AM CDTExcessive Heat WarningLSX4 days
Jun 17, 1:42 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 17, 3:29 AM CDTMesoscale DiscussionSPC2 hr
Jun 17, 5:10 AM CDTSevere Thunderstorm WarningLSX50 min
Jun 17, 5:38 AM CDTMesoscale DiscussionSPC97 min
Jun 25, 5:02 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 25, 7:16 PM CDTMesoscale DiscussionSPC89 min
Jun 25, 9:27 PM CDTMesoscale DiscussionSPC93 min
Jun 25, 10:40 PM CDTSevere Thunderstorm WarningLSX35 min
Jun 25, 11:13 PM CDTMesoscale DiscussionSPC62 min
Jul 3, 1:08 PM CDTHeat AdvisoryLSX72 hr
Jul 8, 4:42 PM CDTMesoscale DiscussionSPC2 hr
Jul 8, 8:05 PM CDTSevere Thunderstorm WarningLSX40 min
Jul 21, 2:02 PM CDTHeat AdvisoryLSX3 days
Jul 25, 2:59 AM CDTFlood WatchLSX30 hr
Jul 26, 3:15 AM CDTFlash Flood WarningLSX6 hr
Jul 26, 6:41 AM CDTFlash Flood WarningLSX3 hr
Aug 1, 3:24 AM CDTHeat AdvisoryLSX64 hr
Aug 2, 3:00 PM CDTHeat AdvisoryLSX28 hr
Aug 3, 1:32 PM CDTMesoscale DiscussionSPC88 min
Aug 3, 1:45 PM CDTFlood WatchLSX20 hr
Aug 3, 1:51 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 3, 3:13 PM CDTSevere Thunderstorm WarningLSX47 min
Aug 3, 3:43 PM CDTMesoscale DiscussionSPC92 min
Aug 3, 4:42 PM CDTSevere Thunderstorm WarningLSX36 min
Aug 3, 5:15 PM CDTAreal Flood AdvisoryLSX3 hr
Aug 3, 5:34 PM CDTSevere Thunderstorm WarningLSX41 min
Aug 3, 5:54 PM CDTAreal Flood AdvisoryLSX3 hr
Aug 8, 9:58 AM CDTFlood WatchLSX18 hr
Aug 20, 12:51 PM CDTMesoscale DiscussionSPC2 hr
Aug 20, 2:45 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 29, 4:23 PM CDTMesoscale DiscussionSPC2 hr
Aug 29, 4:40 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 29, 6:41 PM CDTMesoscale DiscussionSPC2 hr
Aug 29, 8:31 PM CDTMesoscale DiscussionSPC119 min
Sep 4, 8:17 AM CDTAreal Flood AdvisoryLSX51 min
Sep 4, 9:06 AM CDTFlash Flood WarningLSX5 hr
Sep 18, 9:28 PM CDTSevere Thunderstorm WatchSPC7 hr
Sep 18, 11:28 PM CDTMesoscale DiscussionSPC2 hr
Sep 19, 1:47 AM CDTSevere Thunderstorm WarningLSX43 min
Sep 19, 1:58 AM CDTMesoscale DiscussionSPC92 min
Oct 7, 2:42 AM CDTFrost AdvisoryLSX30 hr
Oct 8, 2:54 AM CDTFrost AdvisoryLSX29 hr
Oct 13, 3:15 PM CDTRed Flag WarningLSX29 hr
Oct 16, 2:44 AM CDTFreeze WatchLSX12 hr
Oct 16, 2:23 PM CDTFreeze WarningLSX43 hr
Oct 31, 8:28 PM CDTDense Fog AdvisoryLSX13 hr
Nov 3, 2:08 PM CDTWind AdvisoryLSX45 hr
Dec 1, 1:50 PM CSTWind AdvisoryLSX37 hr
Dec 6, 3:15 AM CSTDense Fog AdvisoryLSX7 hr
Dec 19, 3:48 PM CSTWinter Storm WatchLSX36 hr
Dec 20, 2:54 AM CSTWind Chill WatchLSX25 hr
Dec 21, 3:30 AM CSTWind Chill WarningLSX71 hr
Dec 21, 3:30 AM CSTWinter Storm WarningLSX41 hr
Dec 22, 10:59 AM CSTMesoscale DiscussionSPC4 hr
Dec 22, 2:55 PM CSTWind Chill AdvisoryLSX42 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 archive20212023

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.