Alert archive / Illinois / Jackson County

Weather alerts in Jackson County, Illinois, 2021

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

Jackson County and its neighbors

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

Alerts
126
Warnings
30
Watches
21
Advisories
36
Busiest month
March20 alerts
Busiest day
July 10, 20218 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 2 tornado warnings covering Jackson County in 2021 had a tornado report inside them.

Jackson County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings9544%771%15 min
Flash flood warnings3167%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Paducah, KY: tornado warnings511669%3352%19 min
NWS Paducah, KY: severe thunderstorm warnings1234266%14449%17 min
NWS Paducah, KY: flash flood warnings652955%5283%97 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 4, 5:30 AM CSTDense Fog AdvisoryPAH5 hr
Jan 25, 9:24 PM CSTDense Fog AdvisoryPAH12 hr
Jan 26, 8:48 PM CSTWinter Weather AdvisoryPAH25 hr
Feb 8, 3:54 AM CSTWinter Weather AdvisoryPAH26 hr
Feb 8, 2:47 PM CSTWinter Storm WatchPAH24 hr
Feb 9, 3:10 PM CSTWinter Weather AdvisoryPAH41 hr
Feb 10, 11:18 AM CSTMesoscale DiscussionSPC4 hr
Feb 12, 2:09 PM CSTWinter Storm WatchPAH37 hr
Feb 13, 12:55 PM CSTWind Chill AdvisoryPAH23 hr
Feb 14, 3:00 AM CSTWinter Storm WarningPAH43 hr
Feb 15, 10:44 AM CSTMesoscale DiscussionSPC6 hr
Feb 26, 1:57 PM CSTFlood WatchPAH58 hr
Feb 28, 10:20 AM CSTRiver Flood WarningPAH5 days
Mar 11, 4:11 AM CSTFlood WatchPAH55 hr
Mar 11, 11:12 AM CSTRiver Flood WarningPAH21 days
Mar 11, 1:26 PM CSTMesoscale DiscussionSPC3 hr
Mar 11, 3:09 PM CSTSevere Thunderstorm WarningPAH33 min
Mar 11, 4:22 PM CSTAreal Flood AdvisoryPAH30 min
Mar 11, 4:52 PM CSTFlash Flood WarningPAH3 hr
Mar 16, 1:22 AM CDTDense Fog AdvisoryPAH9 hr
Mar 17, 2:21 AM CDTFlash Flood WatchPAH23 hr
Mar 17, 9:35 PM CDTRiver Flood WarningLSX8 days
Mar 18, 12:17 PM CDTRiver Flood WarningPAH9 days
Mar 25, 3:55 AM CDTWind AdvisoryPAH20 hr
Mar 25, 2:33 PM CDTMesoscale DiscussionSPC117 min
Mar 25, 3:48 PM CDTTornado WatchSPC7 hr
Mar 27, 6:16 PM CDTMesoscale DiscussionSPC89 min
Mar 27, 7:58 PM CDTMesoscale DiscussionSPC92 min
Mar 27, 8:19 PM CDTSevere Thunderstorm WatchSPC114 min
Mar 28, 7:49 PM CDTRiver Flood WarningPAH5 days
Mar 30, 2:26 PM CDTFreeze WatchPAH22 hr
Mar 30, 2:26 PM CDTFreeze WarningPAH43 hr
Mar 31, 12:20 PM CDTFreeze WarningPAH45 hr
Apr 2, 2:15 PM CDTFrost AdvisoryPAH19 hr
Apr 9, 3:22 PM CDTSpecial Weather StatementPAH38 min
Apr 9, 4:56 PM CDTMesoscale DiscussionSPC64 min
Apr 9, 5:24 PM CDTSpecial Weather StatementPAH36 min
Apr 9, 5:36 PM CDTAreal Flood AdvisoryPAH3 hr
Apr 9, 6:57 PM CDTSpecial Weather StatementPAH33 min
Apr 11, 1:04 PM CDTRiver Flood WarningPAH6 days
Apr 11, 9:13 PM CDTRiver Flood WarningLSX6 days
Apr 19, 4:08 AM CDTFreeze WatchPAH11 hr
Apr 19, 3:25 PM CDTFreeze WarningPAH42 hr
Apr 21, 4:00 AM CDTFrost AdvisoryPAH28 hr
Apr 25, 2:43 AM CDTDense Fog AdvisoryPAH6 hr
Apr 27, 3:11 PM CDTFlash Flood WatchPAH45 hr
May 4, 1:06 AM CDTMesoscale DiscussionSPC114 min
May 6, 10:05 AM CDTMesoscale DiscussionSPC85 min
May 6, 12:02 PM CDTMesoscale DiscussionSPC118 min
May 6, 12:26 PM CDTSpecial Weather StatementPAH49 min
May 6, 12:38 PM CDTSevere Thunderstorm WatchSPC5 hr
May 8, 2:19 PM CDTLake Wind AdvisoryPAH29 hr
May 20, 10:12 AM CDTLake Wind AdvisoryPAH9 hr
May 26, 6:37 PM CDTSevere Thunderstorm WarningPAH23 min
May 27, 11:04 AM CDTMesoscale DiscussionSPC86 min
May 27, 11:26 AM CDTSevere Thunderstorm WatchSPC8 hr
May 27, 2:20 PM CDTMesoscale DiscussionSPC85 min
May 27, 2:23 PM CDTSpecial Weather StatementPAH52 min
May 27, 3:38 PM CDTMesoscale DiscussionSPC67 min
May 27, 4:31 PM CDTSevere Thunderstorm WarningPAH44 min
May 27, 6:23 PM CDTAreal Flood AdvisoryPAH112 min
May 28, 2:27 AM CDTLake Wind AdvisoryPAH18 hr
Jun 17, 3:10 PM CDTHeat AdvisoryPAH28 hr
Jun 20, 4:09 AM CDTLake Wind AdvisoryPAH16 hr
Jun 25, 3:31 AM CDTLake Wind AdvisoryPAH16 hr
Jun 25, 12:57 PM CDTMesoscale DiscussionSPC2 hr
Jun 26, 3:21 AM CDTLake Wind AdvisoryPAH17 hr
Jun 26, 12:13 PM CDTRiver Flood WarningLSX9 days
Jun 27, 11:21 AM CDTRiver Flood WarningPAH9 days
Jun 30, 12:22 PM CDTMesoscale DiscussionSPC113 min
Jul 10, 1:01 AM CDTMesoscale DiscussionSPC59 min
Jul 10, 1:36 AM CDTSevere Thunderstorm WatchSPC4 hr
Jul 10, 2:21 AM CDTFlash Flood WatchPAH25 hr
Jul 10, 3:09 AM CDTMesoscale DiscussionSPC2 hr
Jul 10, 1:25 PM CDTMesoscale DiscussionSPC2 hr
Jul 10, 2:01 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 10, 5:29 PM CDTSpecial Weather StatementPAH46 min
Jul 10, 5:33 PM CDTMesoscale DiscussionSPC87 min
Jul 12, 1:13 PM CDTMesoscale DiscussionSPC92 min
Jul 16, 2:28 PM CDTAreal Flood AdvisoryPAH3 hr
Jul 16, 3:25 PM CDTFlash Flood WarningPAH3 hr
Jul 16, 4:46 PM CDTAreal Flood AdvisoryPAH119 min
Jul 19, 8:40 PM CDTRiver Flood WarningPAH5 days
Jul 28, 1:38 PM CDTHeat AdvisoryPAH30 hr
Aug 8, 2:41 PM CDTHeat AdvisoryPAH23 hr
Aug 8, 3:00 PM CDTMesoscale DiscussionSPC2 hr
Aug 8, 5:47 PM CDTMesoscale DiscussionSPC88 min
Aug 9, 1:53 PM CDTHeat AdvisoryPAH3 days
Aug 10, 2:20 PM CDTMesoscale DiscussionSPC2 hr
Aug 12, 7:20 PM CDTMesoscale DiscussionSPC85 min
Aug 12, 7:23 PM CDTSevere Thunderstorm WarningPAH52 min
Aug 12, 7:37 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 12, 8:11 PM CDTSevere Thunderstorm WarningPAH49 min
Aug 21, 4:23 PM CDTSpecial Weather StatementPAH37 min
Aug 22, 2:38 PM CDTHeat AdvisoryPAH6 days
Sep 11, 4:03 AM CDTLake Wind AdvisoryPAH14 hr
Sep 22, 3:45 AM CDTLake Wind AdvisoryPAH13 hr
Sep 27, 4:00 AM CDTLake Wind AdvisoryPAH13 hr
Oct 8, 5:45 AM CDTDense Fog AdvisoryPAH3 hr
Oct 24, 5:44 PM CDTTornado WatchSPC7 hr
Oct 24, 8:17 PM CDTMesoscale DiscussionSPC118 min
Oct 24, 9:42 PM CDTSevere Thunderstorm WarningPAH48 min
Oct 24, 10:24 PM CDTSpecial Weather StatementPAH51 min
Oct 24, 10:33 PM CDTMesoscale DiscussionSPC2 hr
Oct 24, 11:34 PM CDTFlash Flood WarningPAH6 hr
Nov 2, 3:38 AM CDTFreeze WatchPAH24 hr
Nov 2, 11:21 AM CDTFreeze WarningPAH22 hr
Nov 3, 3:19 AM CDTFreeze WarningPAH30 hr
Dec 5, 8:06 PM CSTMesoscale DiscussionSPC114 min
Dec 5, 9:13 PM CSTSpecial Weather StatementPAH62 min
Dec 5, 9:29 PM CSTTornado WarningPAH31 min
Dec 5, 9:59 PM CSTSevere Thunderstorm WarningPAH46 min
Dec 5, 10:00 PM CSTSevere Thunderstorm WarningPAH30 min
Dec 5, 10:12 PM CSTTornado WarningPAH18 min
Dec 5, 10:17 PM CSTAreal Flood AdvisoryPAH3 hr
Dec 5, 11:28 PM CSTMesoscale DiscussionSPC2 hr
Dec 10, 3:07 PM CSTTornado WatchSPC11 hr
Dec 10, 4:45 PM CSTMesoscale DiscussionSPC90 min
Dec 10, 11:03 PM CSTTornado WatchSPC5 hr
Dec 10, 11:28 PM CSTMesoscale DiscussionSPC92 min
Dec 10, 11:33 PM CSTSevere Thunderstorm WarningPAH42 min
Dec 15, 3:30 AM CSTWind AdvisoryPAH24 hr
Dec 17, 3:08 PM CSTFlood WatchPAH12 hr
Dec 25, 11:55 PM CSTDense Fog AdvisoryPAH10 hr
Dec 29, 7:31 AM CSTDense Fog AdvisoryPAH2 hr
Dec 29, 10:01 PM CSTDense Fog AdvisoryPAH11 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.