Alert archive / Missouri / Shannon County

Weather alerts in Shannon County, Missouri, 2017

136 weather alerts in 2017, 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 2017. Tap one for its archive.

Alerts
136
Warnings
59
Watches
20
Advisories
23
Busiest month
April40 alerts
Busiest day
May 27, 201713 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 6 tornado warnings covering Shannon County in 2017 had a tornado report inside them.

Shannon County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings6183%0
Severe thunderstorm warnings231248%1080%25 min
Flash flood warnings5260%10%

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Springfield, MO: tornado warnings511963%5763%17 min
NWS Springfield, MO: severe thunderstorm warnings36524832%74079%26 min
NWS Springfield, MO: flash flood warnings805334%14991%244 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, 8:37 PM CSTDense Fog AdvisorySGF12 hr
Jan 2, 5:47 PM CSTDense Fog AdvisorySGF15 hr
Jan 4, 4:07 AM CSTWinter Weather AdvisorySGF32 hr
Jan 10, 12:05 AM CSTWind AdvisorySGF18 hr
Jan 11, 3:44 AM CSTWinter Storm WatchSGF34 hr
Jan 12, 1:21 PM CSTIce Storm WarningSGF71 hr
Jan 13, 3:39 AM CSTMesoscale DiscussionSPC6 hr
Jan 15, 9:33 AM CSTDense Fog AdvisorySGF22 hr
Jan 19, 2:57 PM CSTDense Fog AdvisorySGF18 hr
Feb 19, 12:50 AM CSTDense Fog AdvisorySGF8 hr
Feb 21, 2:38 PM CSTDense Fog AdvisorySGF18 hr
Feb 23, 3:36 AM CSTDense Fog AdvisorySGF5 hr
Feb 28, 2:29 AM CSTSpecial Weather StatementSGF46 min
Feb 28, 4:07 AM CSTSpecial Weather StatementSGF23 min
Feb 28, 1:46 PM CSTMesoscale DiscussionSPC2 hr
Feb 28, 2:19 PM CSTTornado WatchSPC7 hr
Feb 28, 5:28 PM CSTMesoscale DiscussionSPC2 hr
Feb 28, 5:37 PM CSTSevere Thunderstorm WarningSGF21 days
Feb 28, 6:12 PM CSTTornado WarningSGF14 min
Feb 28, 9:04 PM CSTTornado WatchSPC7 hr
Mar 1, 12:16 AM CSTMesoscale DiscussionSPC89 min
Mar 1, 2:16 AM CSTSevere Thunderstorm WarningSGF59 min
Mar 1, 2:53 AM CSTSevere Thunderstorm WarningSGF44 min
Mar 6, 6:51 PM CSTTornado WatchSPC8 hr
Mar 6, 8:10 PM CSTMesoscale DiscussionSPC3 hr
Mar 6, 11:13 PM CSTMesoscale DiscussionSPC2 hr
Mar 7, 12:41 AM CSTTornado WarningSGF49 min
Mar 9, 11:10 AM CSTSevere Thunderstorm WatchSPC10 hr
Mar 9, 2:26 PM CSTFreeze WarningSGF70 hr
Mar 9, 4:21 PM CSTSevere Thunderstorm WarningSGF54 min
Mar 9, 5:12 PM CSTSevere Thunderstorm WarningSGF48 min
Mar 9, 5:49 PM CSTSevere Thunderstorm WarningSGF56 min
Mar 13, 11:49 AM CDTFreeze WarningSGF23 hr
Mar 13, 11:49 AM CDTFreeze WarningSGF47 hr
Mar 15, 5:34 AM CDTFreeze WarningSGF24 hr
Mar 24, 9:36 PM CDTMesoscale DiscussionSPC54 min
Mar 29, 3:48 PM CDTTornado WatchSPC7 hr
Mar 29, 9:44 PM CDTMesoscale DiscussionSPC91 min
Apr 4, 9:12 PM CDTSevere Thunderstorm WatchSPC4 hr
Apr 4, 9:28 PM CDTMesoscale DiscussionSPC92 min
Apr 4, 11:01 PM CDTTornado WarningSGF44 min
Apr 4, 11:38 PM CDTMesoscale DiscussionSPC97 min
Apr 4, 11:41 PM CDTTornado WarningSGF37 min
Apr 4, 11:50 PM CDTSevere Thunderstorm WarningSGF37 min
Apr 6, 2:14 AM CDTFrost AdvisorySGF31 hr
Apr 10, 5:43 PM CDTMesoscale DiscussionSPC2 hr
Apr 16, 11:58 AM CDTSpecial Weather StatementSGF32 min
Apr 19, 3:55 PM CDTFlood WatchSGF60 hr
Apr 21, 8:25 AM CDTAreal Flood WarningSGF12 hr
Apr 21, 1:54 PM CDTAreal Flood WarningSGF12 hr
Apr 21, 6:19 PM CDTFlash Flood WarningSGF12 hr
Apr 22, 12:16 AM CDTRiver Flood WarningSGF22 hr
Apr 22, 1:49 AM CDTAreal Flood WarningSGF18 hr
Apr 22, 4:00 PM CDTRiver Flood WarningSGF31 hr
Apr 22, 8:45 PM CDTAreal Flood AdvisorySGF18 hr
Apr 26, 9:35 AM CDTSevere Thunderstorm WarningSGF40 min
Apr 26, 10:13 AM CDTSevere Thunderstorm WarningSGF47 min
Apr 26, 10:54 AM CDTSpecial Weather StatementSGF36 min
Apr 26, 11:33 AM CDTAreal Flood WarningSGF6 hr
Apr 26, 5:16 PM CDTAreal Flood WarningSGF18 hr
Apr 26, 10:24 PM CDTRiver Flood WarningSGF22 hr
Apr 27, 4:09 AM CDTFlash Flood WatchSGF4 days
Apr 27, 12:18 PM CDTAreal Flood AdvisorySGF24 hr
Apr 28, 11:04 AM CDTRiver Flood WarningSGF3 days
Apr 28, 11:04 AM CDTRiver Flood WarningSGF3 days
Apr 28, 1:07 PM CDTSevere Thunderstorm WarningSGF23 min
Apr 28, 6:28 PM CDTMesoscale DiscussionSPC3 hr
Apr 28, 10:01 PM CDTSevere Thunderstorm WatchSPC9 hr
Apr 28, 10:43 PM CDTSevere Thunderstorm WarningSGF62 min
Apr 28, 11:39 PM CDTSevere Thunderstorm WarningSGF66 min
Apr 28, 11:55 PM CDTMesoscale DiscussionSPC95 min
Apr 29, 3:39 AM CDTMesoscale DiscussionSPC96 min
Apr 29, 4:19 AM CDTFlash Flood WarningSGF8 hr
Apr 29, 12:11 PM CDTFlash Flood WarningSGF12 hr
Apr 29, 12:50 PM CDTMesoscale DiscussionSPC85 min
Apr 29, 5:06 PM CDTSevere Thunderstorm WarningSGF24 min
Apr 29, 6:50 PM CDTFlash Flood WarningSGF6 hr
Apr 29, 11:54 PM CDTFlash Flood WarningSGF22 hr
Apr 30, 9:20 PM CDTAreal Flood WarningSGF48 hr
May 2, 3:14 AM CDTFlash Flood WatchSGF52 hr
May 2, 9:24 AM CDTRiver Flood WarningSGF70 hr
May 2, 9:24 AM CDTRiver Flood WarningSGF4 days
May 3, 3:32 AM CDTAreal Flood WarningSGF24 hr
May 4, 3:30 AM CDTAreal Flood WarningSGF12 hr
May 4, 3:05 PM CDTAreal Flood WarningSGF18 hr
May 11, 10:46 AM CDTFlash Flood WatchSGF13 hr
May 11, 3:17 PM CDTSevere Thunderstorm WatchSPC7 hr
May 11, 5:49 PM CDTMesoscale DiscussionSPC56 min
May 11, 6:40 PM CDTSevere Thunderstorm WarningSGF44 min
May 17, 3:37 AM CDTWind AdvisorySGF15 hr
May 18, 10:58 PM CDTTornado WatchSPC6 hr
May 19, 3:01 AM CDTTornado WarningSGF44 min
May 19, 9:16 PM CDTMesoscale DiscussionSPC59 min
May 19, 9:42 PM CDTTornado WatchSPC7 hr
May 19, 11:51 PM CDTMesoscale DiscussionSPC114 min
May 27, 12:06 AM CDTSevere Thunderstorm WatchSPC5 hr
May 27, 2:04 AM CDTMesoscale DiscussionSPC116 min
May 27, 3:54 AM CDTMesoscale DiscussionSPC2 hr
May 27, 9:59 AM CDTMesoscale DiscussionSPC2 hr
May 27, 11:21 AM CDTFlash Flood WatchSGF16 hr
May 27, 12:13 PM CDTTornado WatchSPC7 hr
May 27, 1:12 PM CDTMesoscale DiscussionSPC93 min
May 27, 3:29 PM CDTMesoscale DiscussionSPC91 min
May 27, 3:45 PM CDTSevere Thunderstorm WarningSGF60 min
May 27, 4:24 PM CDTMesoscale DiscussionSPC66 min
May 27, 4:28 PM CDTSevere Thunderstorm WarningSGF32 min
May 27, 6:23 PM CDTSevere Thunderstorm WarningSGF52 min
May 27, 6:58 PM CDTSevere Thunderstorm WarningSGF32 min
May 27, 7:01 PM CDTTornado WatchSPC6 hr
May 27, 7:48 PM CDTTornado WarningSGF27 min
May 27, 7:59 PM CDTSevere Thunderstorm WarningSGF61 min
May 28, 12:04 AM CDTAreal Flood WarningSGF12 hr
Jul 5, 7:39 PM CDTAreal Flood AdvisorySGF6 hr
Jul 18, 2:36 PM CDTHeat AdvisorySGF5 days
Jul 25, 2:41 PM CDTHeat AdvisorySGF29 hr
Aug 3, 6:20 PM CDTSpecial Weather StatementSGF40 min
Aug 6, 3:03 AM CDTAreal Flood WarningSGF9 hr
Aug 15, 4:19 AM CDTDense Fog AdvisorySGF5 hr
Aug 20, 11:37 AM CDTSevere Thunderstorm WarningSGF38 min
Aug 20, 12:12 PM CDTSpecial Weather StatementSGF48 min
Aug 20, 12:51 PM CDTSevere Thunderstorm WarningSGF24 min
Aug 20, 1:06 PM CDTMesoscale DiscussionSPC84 min
Sep 18, 10:36 PM CDTDense Fog AdvisorySGF10 hr
Oct 9, 5:35 AM CDTDense Fog AdvisorySGF5 hr
Oct 22, 3:11 AM CDTSevere Thunderstorm WarningSGF64 min
Oct 22, 4:57 AM CDTMesoscale DiscussionSPC93 min
Oct 26, 3:23 AM CDTFreeze WatchSGF24 hr
Oct 27, 3:07 AM CDTFreeze WarningSGF31 hr
Oct 27, 3:07 AM CDTFreeze WarningSGF54 hr
Nov 1, 6:10 PM CDTDense Fog AdvisorySGF15 hr
Nov 5, 2:51 PM CSTMesoscale DiscussionSPC114 min
Nov 6, 10:43 AM CSTMesoscale DiscussionSPC3 hr
Nov 17, 2:52 PM CSTWind AdvisorySGF26 hr
Dec 11, 3:35 AM CSTRed Flag WarningPAH14 hr
Dec 29, 3:35 PM CSTWind Chill AdvisorySGF4 days
Dec 30, 6:07 AM CSTWinter Weather AdvisorySGF4 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 archive20162018

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.