Alert archive / Colorado / Sedgwick County

Weather alerts in Sedgwick County, Colorado, 2020

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

Sedgwick County and its neighbors

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

Alerts
107
Warnings
37
Watches
20
Advisories
14
Busiest month
July27 alerts
Busiest day
July 10, 20204 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 2 tornado warnings covering Sedgwick County in 2020 had a tornado report inside them; 1 of 5 tornado reports fell inside a warning, on average 3 minutes after it went out.

Sedgwick County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings2150%520%3 min
Severe thunderstorm warnings12650%978%21 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Denver/Boulder, CO: tornado warnings5260%2516%13 min
NWS Denver/Boulder, CO: severe thunderstorm warnings2208661%30872%26 min
NWS Denver/Boulder, CO: flash flood warnings5180%1100%29 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 16, 2:09 PM MSTHigh Wind WarningBOU36 hr
Feb 2, 3:45 PM MSTWinter Weather AdvisoryBOU42 hr
Feb 24, 3:42 AM MSTWinter Weather AdvisoryBOU37 hr
Mar 4, 8:20 AM MSTRed Flag WarningBOU9 hr
Mar 13, 2:55 AM MDTWinter Weather AdvisoryBOU26 hr
Mar 17, 1:15 PM MDTWinter Storm WatchBOU24 hr
Mar 17, 8:25 PM MDTDense Fog AdvisoryBOU13 hr
Mar 18, 1:02 PM MDTBlizzard WarningBOU35 hr
Mar 19, 4:45 PM MDTMesoscale DiscussionSPC3 hr
Mar 26, 2:48 PM MDTWinter Weather AdvisoryBOU45 hr
Apr 6, 3:55 AM MDTDense Fog AdvisoryBOU4 hr
Apr 6, 8:10 AM MDTDense Fog AdvisoryBOU50 min
Apr 7, 4:45 AM MDTRed Flag WarningBOU14 hr
Apr 14, 3:09 PM MDTWinter Storm WatchBOU19 hr
Apr 15, 10:32 AM MDTWinter Weather AdvisoryBOU34 hr
Apr 28, 3:27 AM MDTRed Flag WarningBOU17 hr
May 1, 5:19 PM MDTMesoscale DiscussionSPC116 min
May 3, 2:44 PM MDTMesoscale DiscussionSPC2 hr
May 3, 3:09 PM MDTSpecial Weather StatementBOU36 min
May 3, 6:43 PM MDTSevere Thunderstorm WarningBOU47 min
May 3, 8:59 PM MDTMesoscale DiscussionSPC2 hr
May 9, 3:03 AM MDTFrost AdvisoryBOU29 hr
May 11, 5:15 AM MDTFrost AdvisoryBOU2 hr
May 15, 2:15 PM MDTMesoscale DiscussionSPC90 min
May 23, 1:15 PM MDTSevere Thunderstorm WatchSPC7 hr
May 23, 2:57 PM MDTMesoscale DiscussionSPC93 min
May 23, 5:27 PM MDTMesoscale DiscussionSPC93 min
May 23, 7:17 PM MDTSpecial Weather StatementBOU43 min
May 23, 8:01 PM MDTSpecial Weather StatementBOU44 min
May 23, 8:45 PM MDTSpecial Weather StatementBOU45 min
Jun 2, 3:58 PM MDTMesoscale DiscussionSPC92 min
Jun 5, 12:50 PM MDTHigh Wind WarningBOU31 hr
Jun 5, 3:37 PM MDTRed Flag WarningBOU53 hr
Jun 6, 12:21 PM MDTSevere Thunderstorm WatchSPC8 hr
Jun 6, 5:14 PM MDTMesoscale DiscussionSPC2 hr
Jun 6, 6:36 PM MDTSevere Thunderstorm WarningBOU39 min
Jun 8, 3:28 AM MDTHigh Wind WarningBOU36 hr
Jun 8, 8:01 PM MDTMesoscale DiscussionSPC119 min
Jun 9, 12:43 AM MDTSevere Thunderstorm WarningBOU47 min
Jun 14, 11:06 PM MDTSpecial Weather StatementBOU24 min
Jun 15, 3:54 PM MDTRed Flag WarningBOU28 hr
Jun 26, 12:07 PM MDTMesoscale DiscussionSPC113 min
Jun 26, 1:12 PM MDTSevere Thunderstorm WatchSPC10 hr
Jun 26, 3:51 PM MDTMesoscale DiscussionSPC84 min
Jun 26, 6:35 PM MDTSevere Thunderstorm WarningBOU40 min
Jul 2, 1:44 PM MDTMesoscale DiscussionSPC91 min
Jul 2, 1:58 PM MDTSevere Thunderstorm WatchSPC6 hr
Jul 2, 4:53 PM MDTMesoscale DiscussionSPC2 hr
Jul 6, 3:05 PM MDTRed Flag WarningBOU29 hr
Jul 7, 10:23 PM MDTSpecial Weather StatementBOU52 min
Jul 8, 2:39 PM MDTMesoscale DiscussionSPC3 hr
Jul 8, 5:20 PM MDTSevere Thunderstorm WarningBOU40 min
Jul 8, 6:00 PM MDTSevere Thunderstorm WarningBOU45 min
Jul 8, 6:17 PM MDTTornado Warning Tornado observedBOU28 min
Jul 8, 6:42 PM MDTSevere Thunderstorm WarningBOU21 min
Jul 9, 8:00 PM MDTSevere Thunderstorm WarningBOU21 min
Jul 9, 8:05 PM MDTMesoscale DiscussionSPC55 min
Jul 9, 8:59 PM MDTSevere Thunderstorm WarningBOU46 min
Jul 10, 2:14 PM MDTMesoscale DiscussionSPC2 hr
Jul 13, 2:08 PM MDTMesoscale DiscussionSPC2 hr
Jul 13, 2:36 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 16, 6:36 PM MDTSevere Thunderstorm WarningBOU39 min
Jul 19, 2:50 PM MDTMesoscale DiscussionSPC115 min
Jul 19, 4:06 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 19, 5:47 PM MDTSevere Thunderstorm WarningBOU43 min
Jul 19, 5:48 PM MDTAreal Flood AdvisoryBOU117 min
Jul 19, 6:05 PM MDTTornado WarningBOU25 min
Jul 19, 6:48 PM MDTMesoscale DiscussionSPC117 min
Jul 20, 2:51 PM MDTMesoscale DiscussionSPC114 min
Jul 25, 4:24 PM MDTSpecial Weather StatementBOU51 min
Jul 25, 5:19 PM MDTMesoscale DiscussionSPC86 min
Jul 29, 2:09 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 4, 12:52 PM MDTMesoscale DiscussionSPC113 min
Aug 4, 1:46 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 5, 12:27 PM MDTMesoscale DiscussionSPC2 hr
Aug 5, 1:26 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 5, 8:46 PM MDTSevere Thunderstorm WarningBOU44 min
Aug 6, 5:13 PM MDTMesoscale DiscussionSPC2 hr
Aug 11, 1:17 PM MDTMesoscale DiscussionSPC118 min
Aug 12, 4:28 PM MDTMesoscale DiscussionSPC92 min
Aug 16, 12:56 PM MDTMesoscale DiscussionSPC2 hr
Aug 17, 4:15 PM MDTMesoscale DiscussionSPC2 hr
Aug 29, 3:21 PM MDTRed Flag WarningBOU29 hr
Sep 4, 2:40 PM MDTFire Weather WatchBOU13 hr
Sep 4, 2:40 PM MDTRed Flag WarningBOU3 days
Sep 7, 3:41 AM MDTFreeze WarningBOU55 hr
Sep 25, 4:14 AM MDTFire Weather WatchBOU9 hr
Sep 25, 12:45 PM MDTRed Flag WarningBOU31 hr
Oct 3, 2:23 PM MDTFire Weather WatchBOU14 hr
Oct 4, 4:01 AM MDTRed Flag WarningBOU38 hr
Oct 9, 2:49 AM MDTFire Weather WatchBOU13 hr
Oct 9, 3:43 PM MDTFire Weather WatchBOU12 hr
Oct 9, 3:43 PM MDTRed Flag WarningBOU28 hr
Oct 10, 3:44 AM MDTRed Flag WarningBOU40 hr
Oct 11, 3:45 AM MDTFire Weather WatchBOU11 hr
Oct 11, 2:48 PM MDTRed Flag WarningBOU27 hr
Oct 14, 3:44 PM MDTFrost AdvisoryBOU17 hr
Oct 15, 3:25 PM MDTFreeze WarningBOU17 hr
Oct 23, 2:46 PM MDTWinter Storm WatchBOU24 hr
Oct 24, 2:41 PM MDTWinter Storm WarningBOU39 hr
Oct 24, 2:41 PM MDTWinter Weather AdvisoryBOU39 hr
Nov 7, 5:12 AM MSTHigh Wind WarningBOU30 hr
Nov 12, 8:51 PM MSTHigh Wind WatchBOU17 hr
Nov 13, 1:45 PM MSTHigh Wind WarningBOU51 hr
Dec 21, 7:52 PM MSTHigh Wind WatchBOU8 hr
Dec 22, 3:48 AM MSTHigh Wind WarningBOU33 hr
Dec 27, 2:14 PM MSTWinter Weather AdvisoryBOU46 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.