Alert archive / Missouri / Knox County

Weather alerts in Knox County, Missouri, 2025

85 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Knox County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts
85
Warnings
20
Watches
14
Advisories
36
Busiest month
March11 alerts
Busiest day
August 9, 20256 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 Knox County in 2025 had a tornado report inside them.

Knox County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings110%0
Severe thunderstorm warnings5420%2100%36 min
Flash flood warnings10100%0

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS St. Louis, MO: tornado warnings933463%6676%16 min
NWS St. Louis, MO: severe thunderstorm warnings23110355%63367%23 min
NWS St. Louis, MO: flash flood warnings511963%9867%105 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 2, 2:29 PM CSTWinter Storm WatchLSX23 hr
Jan 3, 1:29 PM CSTWinter Storm WarningLSX65 hr
Jan 20, 2:45 AM CSTCold Weather AdvisoryLSX36 hr
Jan 21, 1:24 AM CSTExtreme Cold WarningLSX11 hr
Jan 30, 8:26 PM CSTDense Fog AdvisoryLSX11 hr
Feb 4, 2:41 AM CSTWinter Weather AdvisoryLSX48 hr
Feb 10, 2:57 AM CSTWinter Storm WatchLSX24 hr
Feb 11, 3:21 AM CSTWinter Storm WarningLSX33 hr
Feb 11, 3:21 AM CSTWinter Weather AdvisoryLSX39 hr
Feb 16, 1:42 PM CSTWinter Weather AdvisoryLSX28 hr
Feb 17, 2:09 AM CSTCold Weather AdvisoryLSX34 hr
Feb 18, 12:30 PM CSTCold Weather AdvisoryLSX24 hr
Feb 18, 12:30 PM CSTCold Weather AdvisoryLSX48 hr
Feb 28, 2:31 AM CSTRed Flag WarningLSX17 hr
Mar 3, 2:11 PM CSTWind AdvisoryLSX35 hr
Mar 5, 1:08 AM CSTHigh Wind WarningLSX10 hr
Mar 5, 1:19 AM CSTWind AdvisoryLSX17 hr
Mar 10, 2:46 AM CDTRed Flag WarningLSX17 hr
Mar 13, 2:08 AM CDTWind AdvisoryLSX47 hr
Mar 14, 3:32 AM CDTRed Flag WarningLSX13 hr
Mar 14, 4:03 PM CDTTornado WatchSPC9 hr
Mar 16, 2:43 PM CDTRed Flag WarningLSX29 hr
Mar 18, 1:18 PM CDTWind AdvisoryLSX38 hr
Mar 18, 9:07 PM CDTRed Flag WarningLSX22 hr
Mar 20, 2:30 PM CDTRed Flag WarningLSX29 hr
Apr 1, 2:00 PM CDTWind AdvisoryLSX28 hr
Apr 6, 2:24 AM CDTFreeze WatchLSX23 hr
Apr 7, 1:23 AM CDTFreeze WarningLSX32 hr
Apr 20, 2:20 PM CDTMesoscale DiscussionSPC115 min
Apr 20, 3:41 PM CDTTornado WatchSPC7 hr
Apr 20, 5:40 PM CDTMesoscale DiscussionSPC95 min
Apr 22, 4:54 PM CDTMesoscale DiscussionSPC96 min
May 19, 3:31 PM CDTMesoscale DiscussionSPC89 min
Jun 2, 1:12 PM CDTFlood WatchLSX38 hr
Jun 3, 12:59 PM CDTMesoscale DiscussionSPC2 hr
Jun 3, 1:38 PM CDTTornado WatchSPC6 hr
Jun 3, 4:27 PM CDTSevere Thunderstorm WarningLSX48 min
Jun 3, 4:51 PM CDTSevere Thunderstorm WarningLSX39 min
Jun 3, 5:23 PM CDTSevere Thunderstorm WarningLSX67 min
Jun 14, 1:42 AM CDTDense Fog AdvisoryLSX7 hr
Jun 19, 1:56 PM CDTHeat AdvisoryLSX7 days
Jul 11, 12:18 PM CDTMesoscale DiscussionSPC87 min
Jul 11, 2:19 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 11, 6:47 PM CDTMesoscale DiscussionSPC58 min
Jul 11, 9:14 PM CDTFlash Flood WarningLSX3 hr
Jul 14, 1:37 AM CDTDense Fog AdvisoryLSX7 hr
Jul 18, 2:06 PM CDTExtreme Heat WatchLSX4 days
Jul 19, 7:13 AM CDTMesoscale DiscussionSPC92 min
Jul 20, 1:44 AM CDTFlood WatchLSX33 hr
Jul 21, 1:57 PM CDTHeat AdvisoryLSX9 days
Jul 24, 2:18 AM CDTFlood WatchLSX25 hr
Aug 9, 2:54 PM CDTMesoscale DiscussionSPC96 min
Aug 9, 3:00 PM CDTFlood WatchLSX23 hr
Aug 9, 5:35 PM CDTSevere Thunderstorm WarningLSX70 min
Aug 9, 6:07 PM CDTTornado WarningLSX28 min
Aug 9, 6:15 PM CDTAreal Flood AdvisoryLSX2 hr
Aug 9, 6:42 PM CDTSevere Thunderstorm WarningLSX48 min
Aug 11, 7:25 PM CDTMesoscale DiscussionSPC2 hr
Aug 14, 2:34 PM CDTHeat AdvisoryLSX5 days
Aug 18, 3:51 PM CDTMesoscale DiscussionSPC84 min
Sep 15, 4:49 PM CDTMesoscale DiscussionSPC86 min
Sep 21, 3:34 AM CDTDense Fog AdvisoryLSX5 hr
Oct 11, 12:18 AM CDTDense Fog AdvisoryLSX10 hr
Oct 22, 12:00 PM CDTFrost AdvisoryLSX21 hr
Oct 30, 1:47 PM CDTFrost AdvisoryLSX18 hr
Oct 31, 2:16 AM CDTFreeze WatchLSX36 hr
Nov 1, 1:55 AM CDTFreeze WarningLSX31 hr
Nov 2, 2:21 AM CSTDense Fog AdvisoryLSX8 hr
Nov 20, 7:22 PM CSTDense Fog AdvisoryLSX16 hr
Nov 23, 4:23 AM CSTDense Fog AdvisoryLSX6 hr
Nov 23, 5:41 PM CSTDense Fog AdvisoryLSX15 hr
Nov 27, 3:25 AM CSTWinter Storm WatchLSX23 hr
Nov 28, 2:17 AM CSTWinter Storm WarningLSX39 hr
Nov 29, 3:18 AM CSTMesoscale DiscussionSPC4 hr
Nov 29, 10:42 AM CSTMesoscale DiscussionSPC5 hr
Nov 30, 12:51 PM CSTWinter Weather AdvisoryLSX38 hr
Dec 9, 1:17 PM CSTWind AdvisoryLSX23 hr
Dec 12, 12:53 PM CSTCold Weather AdvisoryLSX47 hr
Dec 12, 1:20 PM CSTWinter Weather AdvisoryLSX29 hr
Dec 18, 1:56 AM CSTWind AdvisoryLSX22 hr
Dec 24, 12:49 PM CSTDense Fog AdvisoryLSX41 hr
Dec 26, 7:29 PM CSTDense Fog AdvisoryLSX17 hr
Dec 27, 6:32 PM CSTDense Fog AdvisoryLSX8 hr
Dec 28, 7:16 AM CSTMesoscale DiscussionSPC119 min
Dec 28, 8:01 AM CSTWind AdvisoryLSX22 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 archive20242026

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.