Alert archive / Missouri / Boone County

Weather alerts in Boone County, Missouri, 2015

119 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Boone County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts
119
Warnings
41
Watches
26
Advisories
20
Busiest month
July29 alerts
Busiest day
April 8, 20158 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 3 tornado warnings covering Boone County in 2015 had a tornado report inside them.

Boone County, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings30100%0
Severe thunderstorm warnings10460%1443%20 min
Flash flood warnings6433%771%21 min

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS St. Louis, MO: tornado warnings45589%1650%11 min
NWS St. Louis, MO: severe thunderstorm warnings2149854%37874%23 min
NWS St. Louis, MO: flash flood warnings964157%12683%176 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 6, 4:16 AM CSTWind Chill AdvisoryLSX53 hr
Jan 10, 3:10 PM CSTWinter Weather AdvisoryLSX42 hr
Feb 15, 2:50 AM CSTWinter Storm WarningLSX37 hr
Feb 19, 3:58 PM CSTWinter Weather AdvisoryLSX42 hr
Feb 20, 6:37 PM CSTMesoscale DiscussionSPC6 hr
Feb 22, 3:36 AM CSTWind Chill AdvisoryLSX29 hr
Feb 27, 4:12 PM CSTWinter Weather AdvisoryLSX47 hr
Mar 24, 2:59 PM CDTSevere Thunderstorm WatchSPC7 hr
Mar 24, 5:30 PM CDTMesoscale DiscussionSPC90 min
Mar 24, 7:34 PM CDTMesoscale DiscussionSPC116 min
Apr 2, 5:22 AM CDTMesoscale DiscussionSPC113 min
Apr 7, 3:51 AM CDTMesoscale DiscussionSPC54 min
Apr 7, 4:59 AM CDTSevere Thunderstorm WarningLSX46 min
Apr 8, 6:17 AM CDTMesoscale DiscussionSPC88 min
Apr 8, 6:39 AM CDTSevere Thunderstorm WatchSPC6 hr
Apr 8, 9:33 AM CDTMesoscale DiscussionSPC57 min
Apr 8, 12:46 PM CDTSevere Thunderstorm WarningLSX44 min
Apr 8, 3:24 PM CDTFlash Flood WatchLSX31 hr
Apr 8, 5:45 PM CDTMesoscale DiscussionSPC60 min
Apr 8, 6:27 PM CDTSevere Thunderstorm WarningLSX33 min
Apr 8, 6:56 PM CDTSevere Thunderstorm WarningLSX49 min
Apr 9, 12:58 PM CDTTornado WatchSPC6 hr
Apr 9, 3:12 PM CDTMesoscale DiscussionSPC93 min
Apr 9, 3:20 PM CDTSevere Thunderstorm WarningLSX40 min
Apr 9, 3:54 PM CDTSevere Thunderstorm WarningLSX42 min
Apr 22, 3:27 PM CDTFrost AdvisoryLSX17 hr
May 10, 11:00 AM CDTMesoscale DiscussionSPC3 hr
May 10, 1:22 PM CDTTornado WatchSPC4 hr
May 14, 3:44 PM CDTMesoscale DiscussionSPC3 hr
May 15, 2:13 PM CDTMesoscale DiscussionSPC2 hr
May 15, 6:40 PM CDTMesoscale DiscussionSPC2 hr
May 15, 8:06 PM CDTAreal Flood AdvisoryLSX3 hr
May 15, 8:24 PM CDTFlash Flood WarningLSX3 hr
May 19, 6:48 AM CDTRiver Flood WarningLSX33 hr
May 24, 12:54 PM CDTMesoscale DiscussionSPC96 min
May 24, 1:18 PM CDTTornado WatchSPC6 hr
May 24, 3:19 PM CDTSevere Thunderstorm WarningLSX41 min
May 29, 3:13 PM CDTRiver Flood WarningLSX41 hr
May 29, 8:55 PM CDTFlash Flood WatchLSX22 hr
Jun 5, 11:40 AM CDTRiver Flood WarningLSX8 days
Jun 7, 7:48 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 7, 9:38 PM CDTMesoscale DiscussionSPC97 min
Jun 7, 10:15 PM CDTSevere Thunderstorm WarningLSX48 min
Jun 8, 12:38 AM CDTFlash Flood WarningLSX8 hr
Jun 8, 8:27 AM CDTAreal Flood WarningLSX5 hr
Jun 13, 11:05 AM CDTRiver Flood WarningLSX7 days
Jun 13, 3:51 PM CDTMesoscale DiscussionSPC84 min
Jun 13, 4:58 PM CDTTornado WarningLSX32 min
Jun 13, 5:29 PM CDTTornado WarningLSX31 min
Jun 16, 3:42 AM CDTFlash Flood WatchLSX4 days
Jun 21, 9:42 AM CDTMesoscale DiscussionSPC2 hr
Jun 21, 12:12 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 25, 4:06 AM CDTFlash Flood WatchLSX39 hr
Jun 25, 4:53 PM CDTSevere Thunderstorm WatchSPC9 hr
Jun 25, 7:27 PM CDTMesoscale DiscussionSPC93 min
Jun 25, 7:31 PM CDTFlash Flood WarningLSX12 hr
Jun 25, 8:45 PM CDTRiver Flood WarningLSX8 days
Jun 25, 9:06 PM CDTMesoscale DiscussionSPC84 min
Jun 26, 7:30 AM CDTAreal Flood WarningLSX12 hr
Jun 28, 1:36 PM CDTMesoscale DiscussionSPC114 min
Jun 28, 3:03 PM CDTTornado WatchSPC8 hr
Jun 28, 4:22 PM CDTSevere Thunderstorm WarningLSX38 min
Jun 30, 4:08 PM CDTFlash Flood WatchLSX36 hr
Jul 1, 7:43 PM CDTTornado WarningLSX32 min
Jul 1, 7:55 PM CDTFlash Flood WarningLSX4 hr
Jul 1, 8:25 PM CDTSevere Thunderstorm WarningLSX50 min
Jul 1, 11:58 PM CDTAreal Flood WarningLSX9 hr
Jul 2, 8:59 AM CDTAreal Flood WarningLSX12 hr
Jul 2, 4:50 PM CDTRiver Flood WarningLSX47 hr
Jul 6, 3:55 AM CDTFlash Flood WatchLSX68 hr
Jul 6, 3:26 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 6, 6:20 PM CDTMesoscale DiscussionSPC115 min
Jul 8, 10:01 PM CDTRiver Flood WarningLSX3 days
Jul 9, 3:35 AM CDTFlash Flood WatchLSX27 hr
Jul 11, 3:30 PM CDTHeat AdvisoryLSX3 days
Jul 13, 4:33 PM CDTMesoscale DiscussionSPC57 min
Jul 13, 6:20 PM CDTSevere Thunderstorm WatchSPC4 hr
Jul 16, 3:46 PM CDTHeat AdvisoryLSX3 days
Jul 19, 4:35 AM CDTFlash Flood WatchLSX11 hr
Jul 19, 9:13 AM CDTAreal Flood AdvisoryLSX6 hr
Jul 19, 4:03 PM CDTFlash Flood WatchLSX20 hr
Jul 19, 4:40 PM CDTRiver Flood WarningLSX6 days
Jul 24, 2:08 PM CDTMesoscale DiscussionSPC67 min
Jul 24, 2:35 PM CDTSevere Thunderstorm WatchSPC3 hr
Jul 24, 3:59 PM CDTHeat AdvisoryLSX27 hr
Jul 25, 2:16 AM CDTSpecial Weather StatementLSX44 min
Jul 25, 4:05 PM CDTHeat AdvisoryLSX48 hr
Jul 25, 4:09 PM CDTFlash Flood WatchLSX20 hr
Jul 25, 9:32 PM CDTMesoscale DiscussionSPC88 min
Jul 26, 2:06 AM CDTMesoscale DiscussionSPC2 hr
Jul 26, 2:10 AM CDTSpecial Weather StatementLSX50 min
Jul 27, 3:40 PM CDTExcessive Heat WarningLSX48 hr
Aug 4, 2:44 PM CDTFlash Flood WatchLSX25 hr
Aug 9, 2:50 AM CDTHeat AdvisoryLSX16 hr
Aug 9, 3:55 PM CDTMesoscale DiscussionSPC2 hr
Aug 18, 5:15 PM CDTMesoscale DiscussionSPC90 min
Aug 22, 6:47 AM CDTFlash Flood WarningLSX4 hr
Sep 18, 7:03 PM CDTMesoscale DiscussionSPC87 min
Oct 16, 2:36 AM CDTFrost AdvisoryLSX29 hr
Oct 17, 2:52 AM CDTFrost AdvisoryLSX29 hr
Oct 19, 3:28 AM CDTRed Flag WarningLSX16 hr
Nov 1, 3:48 AM CSTDense Fog AdvisoryLSX4 hr
Nov 2, 8:43 PM CSTDense Fog AdvisoryLSX13 hr
Nov 10, 6:56 PM CSTWind AdvisoryLSX35 hr
Nov 11, 10:17 AM CSTMesoscale DiscussionSPC118 min
Nov 11, 3:20 PM CSTTornado WatchSPC6 hr
Nov 17, 3:42 PM CSTAreal Flood WarningLSX6 hr
Nov 17, 4:56 PM CSTAreal Flood WarningLSX6 hr
Nov 17, 9:42 PM CSTAreal Flood WarningLSX12 hr
Nov 25, 3:24 AM CSTFlood WatchLSX3 days
Dec 14, 12:20 PM CSTRiver Flood WarningLSX6 days
Dec 23, 12:42 PM CSTMesoscale DiscussionSPC2 hr
Dec 23, 1:29 PM CSTWind AdvisoryLSX9 hr
Dec 25, 2:17 AM CSTFlash Flood WatchLSX4 days
Dec 26, 7:59 PM CSTRiver Flood WarningLSX6 days
Dec 26, 10:26 PM CSTFlash Flood WarningLSX8 hr
Dec 27, 3:17 AM CSTAreal Flood WarningLSX12 hr
Dec 27, 3:05 PM CSTAreal Flood WarningLSX24 hr
Dec 27, 3:55 PM CSTWind AdvisoryLSX23 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 archive20142016

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.