Alert archive / Missouri / Shannon County

Weather alerts in Shannon County, Missouri, 2020

150 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Shannon County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
150
Warnings
47
Watches
22
Advisories
43
Busiest month
May33 alerts
Busiest day
May 4, 20208 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 Shannon County in 2020 had a tornado report inside them.

Shannon County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings191142%1191%17 min
Flash flood warnings4325%3100%238 min

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Springfield, MO: tornado warnings27196%450%5 min
NWS Springfield, MO: severe thunderstorm warnings28116741%49988%21 min
NWS Springfield, MO: flash flood warnings584129%17188%207 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 3, 4:33 AM CSTDense Fog AdvisorySGF4 hr
Jan 8, 2:15 PM CSTFlash Flood WatchSGF62 hr
Jan 10, 10:16 AM CSTRiver Flood WarningSGF52 hr
Jan 10, 10:16 AM CSTRiver Flood WarningSGF62 hr
Jan 10, 4:55 PM CSTMesoscale DiscussionSPC2 hr
Jan 10, 5:34 PM CSTTornado WatchSPC11 hr
Jan 10, 7:30 PM CSTMesoscale DiscussionSPC2 hr
Jan 10, 10:24 PM CSTFlash Flood WarningSGF12 hr
Jan 10, 10:38 PM CSTSevere Thunderstorm WarningSGF37 min
Jan 10, 10:40 PM CSTMesoscale DiscussionSPC2 hr
Jan 11, 10:07 AM CSTAreal Flood WarningSGF24 hr
Jan 12, 9:50 AM CSTAreal Flood AdvisorySGF24 hr
Jan 13, 7:05 AM CSTDense Fog AdvisorySGF6 hr
Jan 14, 2:27 AM CSTDense Fog AdvisorySGF6 hr
Jan 14, 9:54 AM CSTDense Fog AdvisorySGF66 min
Jan 16, 2:22 AM CSTFlood WatchSGF52 hr
Jan 16, 3:03 AM CSTWinter Weather AdvisorySGF41 hr
Jan 18, 12:59 AM CSTAreal Flood WarningSGF12 hr
Jan 18, 12:42 PM CSTAreal Flood AdvisorySGF10 hr
Jan 20, 2:27 PM CSTWinter Weather AdvisorySGF4 hr
Jan 21, 2:55 PM CSTWinter Weather AdvisorySGF21 hr
Jan 22, 12:18 PM CSTWinter Weather AdvisorySGF24 hr
Jan 23, 3:17 AM CSTWinter Weather AdvisorySGF36 hr
Jan 23, 12:09 PM CSTWinter Weather AdvisorySGF6 hr
Jan 26, 8:47 PM CSTDense Fog AdvisorySGF13 hr
Jan 28, 3:09 AM CSTWinter Weather AdvisorySGF33 hr
Feb 4, 3:51 AM CSTWinter Weather AdvisorySGF53 hr
Feb 4, 7:31 AM CSTAreal Flood WarningSGF12 hr
Feb 11, 6:04 PM CSTFlood WatchSGF30 hr
Feb 22, 2:54 AM CSTFlood WatchSGF63 hr
Feb 24, 12:20 PM CSTMesoscale DiscussionSPC115 min
Mar 1, 10:16 PM CSTMesoscale DiscussionSPC2 hr
Mar 2, 3:54 PM CSTMesoscale DiscussionSPC2 hr
Mar 2, 5:21 PM CSTTornado WatchSPC8 hr
Mar 2, 5:46 PM CSTSevere Thunderstorm WarningSGF44 min
Mar 2, 5:56 PM CSTSevere Thunderstorm WarningSGF46 min
Mar 2, 6:31 PM CSTSevere Thunderstorm WarningSGF17 min
Mar 2, 6:39 PM CSTMesoscale DiscussionSPC96 min
Mar 2, 6:53 PM CSTSpecial Weather StatementSGF52 min
Mar 11, 9:43 PM CDTDense Fog AdvisorySGF12 hr
Mar 12, 2:31 PM CDTMesoscale DiscussionSPC89 min
Mar 12, 3:44 PM CDTTornado WatchSPC7 hr
Mar 12, 3:57 PM CDTSpecial Weather StatementSGF33 min
Mar 12, 4:09 PM CDTSevere Thunderstorm WarningSGF24 min
Mar 14, 11:17 AM CDTAreal Flood AdvisorySGF12 hr
Mar 14, 11:15 PM CDTAreal Flood AdvisorySGF11 hr
Mar 15, 10:13 AM CDTAreal Flood AdvisorySGF6 hr
Mar 17, 4:34 AM CDTAreal Flood AdvisorySGF6 hr
Mar 18, 2:24 PM CDTFlash Flood WatchSGF29 hr
Mar 19, 11:05 AM CDTMesoscale DiscussionSPC115 min
Mar 19, 1:10 PM CDTSpecial Weather StatementSGF50 min
Mar 19, 1:54 PM CDTAreal Flood WarningSGF6 hr
Mar 19, 8:40 PM CDTRiver Flood WarningSGF33 hr
Mar 19, 8:50 PM CDTAreal Flood WarningSGF14 hr
Mar 19, 9:18 PM CDTRiver Flood WarningSGF43 hr
Mar 20, 11:14 AM CDTAreal Flood AdvisorySGF48 hr
Mar 27, 3:45 PM CDTMesoscale DiscussionSPC2 hr
Mar 27, 4:06 PM CDTSevere Thunderstorm WatchSPC5 hr
Mar 27, 5:15 PM CDTMesoscale DiscussionSPC90 min
Mar 27, 6:02 PM CDTSevere Thunderstorm WarningSGF44 min
Mar 28, 1:17 PM CDTMesoscale DiscussionSPC88 min
Apr 8, 3:45 PM CDTMesoscale DiscussionSPC2 hr
Apr 8, 4:24 PM CDTTornado WatchSPC7 hr
Apr 12, 3:57 AM CDTWind AdvisorySGF27 hr
Apr 14, 2:11 PM CDTFreeze WarningSGF18 hr
Apr 15, 1:51 PM CDTFrost AdvisorySGF18 hr
Apr 17, 10:54 AM CDTFrost AdvisorySGF22 hr
Apr 20, 2:20 PM CDTMesoscale DiscussionSPC2 hr
Apr 20, 7:58 PM CDTSevere Thunderstorm WarningSGF47 min
Apr 28, 3:51 PM CDTSevere Thunderstorm WatchSPC7 hr
Apr 28, 6:32 PM CDTMesoscale DiscussionSPC118 min
Apr 28, 8:47 PM CDTSevere Thunderstorm WarningSGF58 min
Apr 28, 9:06 PM CDTMesoscale DiscussionSPC84 min
May 3, 8:34 AM CDTSevere Thunderstorm WatchSPC5 hr
May 3, 10:34 AM CDTMesoscale DiscussionSPC86 min
May 3, 11:55 AM CDTSevere Thunderstorm WarningSGF50 min
May 4, 6:33 AM CDTSevere Thunderstorm WatchSPC12 hr
May 4, 10:38 AM CDTMesoscale DiscussionSPC97 min
May 4, 1:04 PM CDTMesoscale DiscussionSPC86 min
May 4, 2:14 PM CDTSevere Thunderstorm WarningSGF16 min
May 4, 2:28 PM CDTSevere Thunderstorm WarningSGF47 min
May 4, 3:18 PM CDTSevere Thunderstorm WarningSGF57 min
May 4, 3:44 PM CDTMesoscale DiscussionSPC61 min
May 4, 5:43 PM CDTAreal Flood AdvisorySGF4 hr
May 4, 9:45 PM CDTAreal Flood AdvisorySGF12 hr
May 4, 9:48 PM CDTRiver Flood WarningSGF24 hr
May 5, 8:04 AM CDTRiver Flood WarningSGF25 hr
May 8, 3:51 AM CDTFrost AdvisorySGF27 hr
May 10, 1:44 PM CDTFrost AdvisorySGF17 hr
May 13, 3:19 PM CDTRiver Flood WarningSGF7 hr
May 14, 9:34 PM CDTSpecial Weather StatementSGF56 min
May 14, 9:58 PM CDTFlash Flood WarningSGF6 hr
May 14, 10:41 PM CDTFlash Flood WarningSGF6 hr
May 14, 11:01 PM CDTSevere Thunderstorm WarningSGF59 min
May 14, 11:15 PM CDTRiver Flood WarningSGF10 hr
May 15, 4:06 AM CDTAreal Flood WarningSGF12 hr
May 16, 1:19 AM CDTAreal Flood WarningSGF10 hr
May 16, 8:21 PM CDTFlash Flood WatchSGF15 hr
May 17, 3:19 AM CDTAreal Flood AdvisorySGF9 hr
May 17, 12:12 PM CDTAreal Flood AdvisorySGF23 hr
May 17, 2:32 PM CDTRiver Flood WarningSGF10 hr
May 17, 7:56 PM CDTRiver Flood WarningSGF5 hr
May 18, 12:38 AM CDTAreal Flood WarningSGF12 hr
May 18, 12:32 PM CDTAreal Flood AdvisorySGF6 hr
May 25, 2:22 AM CDTSpecial Weather StatementSGF38 min
May 25, 2:15 PM CDTMesoscale DiscussionSPC90 min
Jun 3, 4:08 PM CDTSpecial Weather StatementSGF52 min
Jun 5, 3:41 AM CDTSevere Thunderstorm WatchSPC4 hr
Jun 7, 3:25 AM CDTFlash Flood WatchSGF55 hr
Jun 8, 12:09 PM CDTRiver Flood WarningSGF41 hr
Jul 1, 9:55 AM CDTMesoscale DiscussionSPC95 min
Jul 15, 8:49 PM CDTSpecial Weather StatementSGF41 min
Jul 16, 9:07 PM CDTSpecial Weather StatementSGF38 min
Jul 17, 3:30 AM CDTHeat AdvisorySGF65 hr
Jul 17, 12:02 PM CDTAreal Flood AdvisorySGF6 hr
Jul 20, 3:45 PM CDTSevere Thunderstorm WarningSGF15 min
Jul 22, 11:54 AM CDTMesoscale DiscussionSPC2 hr
Jul 29, 2:47 PM CDTFlash Flood WatchSGF29 hr
Jul 31, 3:08 AM CDTFlash Flood WatchSGF17 hr
Jul 31, 3:02 PM CDTAreal Flood AdvisorySGF6 hr
Jul 31, 4:39 PM CDTFlash Flood WarningSGF6 hr
Aug 9, 5:34 PM CDTMesoscale DiscussionSPC116 min
Aug 10, 2:38 PM CDTMesoscale DiscussionSPC2 hr
Aug 15, 2:00 PM CDTMesoscale DiscussionSPC2 hr
Aug 29, 11:56 AM CDTMesoscale DiscussionSPC94 min
Aug 29, 1:00 PM CDTSpecial Weather StatementSGF75 min
Aug 31, 8:41 AM CDTSevere Thunderstorm WatchSPC5 hr
Aug 31, 12:43 PM CDTMesoscale DiscussionSPC92 min
Aug 31, 1:00 PM CDTSpecial Weather StatementSGF45 min
Sep 3, 12:40 AM CDTDense Fog AdvisorySGF8 hr
Sep 24, 9:34 PM CDTDense Fog AdvisorySGF12 hr
Oct 4, 2:18 AM CDTFrost AdvisorySGF30 hr
Oct 15, 2:26 AM CDTFrost AdvisorySGF31 hr
Oct 15, 2:06 PM CDTFreeze WarningSGF19 hr
Oct 16, 3:24 AM CDTFire Weather WatchPAH12 hr
Oct 16, 3:25 PM CDTRed Flag WarningPAH28 hr
Oct 20, 4:58 PM CDTDense Fog AdvisorySGF17 hr
Oct 27, 1:58 PM CDTFlood WatchSGF47 hr
Nov 14, 5:14 PM CSTTornado WatchSPC8 hr
Nov 14, 8:38 PM CSTSevere Thunderstorm WarningSGF67 min
Nov 14, 8:58 PM CSTSevere Thunderstorm WarningSGF62 min
Nov 14, 8:58 PM CSTSevere Thunderstorm WarningSGF31 min
Nov 14, 9:58 PM CSTSevere Thunderstorm WarningSGF35 min
Nov 14, 10:19 PM CSTTornado WarningSGF26 min
Nov 14, 10:32 PM CSTSevere Thunderstorm WarningSGF43 min
Nov 19, 3:07 AM CSTRed Flag WarningPAH15 hr
Nov 22, 11:33 PM CSTDense Fog AdvisorySGF11 hr
Dec 11, 10:21 PM CSTAreal Flood AdvisorySGF9 hr
Dec 12, 3:03 PM CSTWinter Weather AdvisorySGF30 hr
Dec 19, 9:37 PM CSTDense Fog AdvisorySGF11 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 archive20192021

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.