Alert archive / Nebraska / Sheridan County

Weather alerts in Sheridan County, Nebraska, 2017

144 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sheridan County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
144
Warnings
49
Watches
18
Advisories
21
Busiest month
July31 alerts
Busiest day
June 13, 201715 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 3 tornado warnings covering Sheridan County in 2017 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 3 minutes after it went out.

Sheridan County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings3167%250%3 min
Severe thunderstorm warnings281354%1392%15 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS North Platte, NE: tornado warnings17382%1258%12 min
NWS North Platte, NE: severe thunderstorm warnings26315242%29483%17 min
NWS North Platte, NE: flash flood warnings16663%1656%131 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 3, 3:07 AM MSTWind Chill AdvisoryLBF32 hr
Jan 4, 2:23 AM MSTWind Chill AdvisoryLBF33 hr
Jan 4, 10:26 PM MSTWind Chill WarningLBF13 hr
Jan 5, 2:00 AM MSTWind Chill WarningLBF33 hr
Jan 6, 2:15 PM MSTWind Chill AdvisoryLBF19 hr
Jan 22, 2:15 PM MSTWinter Storm WatchLBF25 hr
Jan 23, 3:13 PM MSTWinter Storm WarningLBF40 hr
Feb 7, 11:31 AM MSTWinter Weather AdvisoryLBF19 hr
Feb 21, 3:09 AM MSTRed Flag WarningLBF15 hr
Feb 21, 12:42 PM MSTWinter Storm WatchLBF25 hr
Feb 22, 1:14 PM MSTWinter Storm WarningLBF46 hr
Feb 23, 5:31 AM MSTMesoscale DiscussionSPC4 hr
Mar 4, 1:27 PM MSTFire Weather WatchLBF14 hr
Mar 5, 3:01 AM MSTHigh Wind WatchLBF11 hr
Mar 5, 3:08 AM MSTRed Flag WarningLBF40 hr
Mar 5, 1:45 PM MSTHigh Wind WarningLBF28 hr
Mar 6, 1:57 PM MSTRed Flag WarningLBF28 hr
Mar 6, 2:09 PM MSTSpecial Weather StatementLBF81 min
Mar 6, 3:13 PM MSTSpecial Weather StatementLBF92 min
Mar 7, 9:55 AM MSTHigh Wind WarningLBF7 hr
Mar 15, 1:55 PM MDTRed Flag WarningLBF29 hr
Mar 17, 3:20 PM MDTFire Weather WatchLBF23 hr
Mar 18, 3:30 AM MDTRed Flag WarningLBF40 hr
Mar 23, 2:53 PM MDTMesoscale DiscussionSPC2 hr
Apr 6, 8:14 PM MDTFire Weather WatchLBF7 hr
Apr 7, 2:59 AM MDTRed Flag WarningLBF16 hr
Apr 13, 4:08 AM MDTDense Fog AdvisoryLBF5 hr
Apr 17, 11:48 PM MDTSpecial Weather StatementLBF42 min
May 14, 9:35 PM MDTSpecial Weather StatementLBF40 min
May 14, 10:10 PM MDTSpecial Weather StatementLBF50 min
May 14, 11:30 PM MDTSevere Thunderstorm WarningLBF45 min
May 15, 4:40 PM MDTSevere Thunderstorm WatchSPC7 hr
May 15, 6:34 PM MDTMesoscale DiscussionSPC56 min
May 15, 9:53 PM MDTMesoscale DiscussionSPC67 min
May 15, 10:35 PM MDTSpecial Weather StatementLBF40 min
May 15, 10:46 PM MDTSevere Thunderstorm WarningLBF44 min
May 15, 11:28 PM MDTSpecial Weather StatementLBF47 min
May 16, 12:01 AM MDTSevere Thunderstorm WarningLBF44 min
May 16, 4:47 PM MDTMesoscale DiscussionSPC88 min
May 20, 2:50 AM MDTFrost AdvisoryLBF28 hr
May 23, 1:46 PM MDTFrost AdvisoryLBF17 hr
May 28, 2:54 PM MDTMesoscale DiscussionSPC66 min
Jun 5, 9:24 PM MDTSpecial Weather StatementLBF51 min
Jun 12, 5:05 PM MDTMesoscale DiscussionSPC85 min
Jun 12, 5:35 PM MDTTornado WatchSPC8 hr
Jun 12, 6:45 PM MDTSpecial Weather StatementLBF45 min
Jun 12, 6:57 PM MDTSevere Thunderstorm WarningLBF48 min
Jun 12, 7:43 PM MDTSevere Thunderstorm WarningLBF47 min
Jun 12, 8:00 PM MDTAreal Flood AdvisoryLBF60 min
Jun 12, 8:02 PM MDTMesoscale DiscussionSPC58 min
Jun 12, 8:09 PM MDTSevere Thunderstorm WarningLBF51 min
Jun 12, 8:17 PM MDTSevere Thunderstorm WarningLBF58 min
Jun 12, 8:25 PM MDTSevere Thunderstorm WarningLBF29 min
Jun 12, 8:37 PM MDTTornado WarningLBF38 min
Jun 12, 9:04 PM MDTTornado WarningLBF41 min
Jun 12, 9:12 PM MDTAreal Flood AdvisoryLBF63 min
Jun 12, 9:18 PM MDTSevere Thunderstorm WarningLBF42 min
Jun 12, 9:44 PM MDTTornado WarningLBF46 min
Jun 12, 9:54 PM MDTSevere Thunderstorm WarningLBF66 min
Jun 12, 10:14 PM MDTMesoscale DiscussionSPC91 min
Jun 27, 2:04 PM MDTMesoscale DiscussionSPC2 hr
Jun 27, 4:07 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 27, 4:14 PM MDTSpecial Weather StatementLBF46 min
Jun 27, 4:27 PM MDTSevere Thunderstorm WarningLBF48 min
Jun 27, 8:17 PM MDTSevere Thunderstorm WarningLBF43 min
Jun 27, 8:53 PM MDTSevere Thunderstorm WarningLBF67 min
Jun 28, 3:07 PM MDTMesoscale DiscussionSPC113 min
Jun 28, 4:36 PM MDTSpecial Weather StatementLBF39 min
Jul 2, 3:02 PM MDTSpecial Weather StatementLBF43 min
Jul 2, 3:09 PM MDTSevere Thunderstorm WarningLBF51 min
Jul 2, 3:56 PM MDTSevere Thunderstorm WarningLBF49 min
Jul 2, 4:03 PM MDTSpecial Weather StatementLBF42 min
Jul 2, 4:14 PM MDTSevere Thunderstorm WarningLBF24 min
Jul 2, 4:30 PM MDTSevere Thunderstorm WarningLBF30 min
Jul 2, 4:41 PM MDTSevere Thunderstorm WarningLBF18 min
Jul 2, 4:58 PM MDTSevere Thunderstorm WatchSPC6 hr
Jul 2, 7:45 PM MDTSevere Thunderstorm WarningLBF45 min
Jul 3, 4:06 PM MDTSpecial Weather StatementLBF24 min
Jul 3, 4:32 PM MDTSevere Thunderstorm WarningLBF28 min
Jul 3, 4:49 PM MDTMesoscale DiscussionSPC56 min
Jul 5, 6:44 PM MDTSevere Thunderstorm WarningLBF46 min
Jul 6, 10:05 PM MDTSpecial Weather StatementLBF40 min
Jul 6, 10:11 PM MDTSevere Thunderstorm WarningLBF49 min
Jul 6, 10:53 PM MDTSpecial Weather StatementLBF52 min
Jul 7, 6:27 PM MDTSpecial Weather StatementLBF48 min
Jul 7, 7:04 PM MDTMesoscale DiscussionSPC116 min
Jul 7, 8:57 PM MDTSpecial Weather StatementLBF48 min
Jul 7, 9:42 PM MDTSpecial Weather StatementLBF48 min
Jul 7, 10:27 PM MDTSevere Thunderstorm WarningLBF48 min
Jul 10, 4:08 PM MDTMesoscale DiscussionSPC2 hr
Jul 17, 8:50 PM MDTSevere Thunderstorm WarningLBF40 min
Jul 17, 9:18 PM MDTSevere Thunderstorm WarningLBF42 min
Jul 17, 11:00 PM MDTSpecial Weather StatementLBF45 min
Jul 18, 6:58 PM MDTMesoscale DiscussionSPC2 hr
Jul 22, 1:09 PM MDTSpecial Weather StatementLBF51 min
Jul 25, 3:21 AM MDTRed Flag WarningLBF16 hr
Jul 25, 1:41 PM MDTMesoscale DiscussionSPC2 hr
Jul 25, 2:22 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 27, 5:40 PM MDTSevere Thunderstorm WarningLBF50 min
Aug 1, 3:00 PM MDTSpecial Weather StatementLBF30 min
Aug 2, 1:15 PM MDTMesoscale DiscussionSPC3 hr
Aug 2, 3:47 PM MDTSpecial Weather StatementLBF43 min
Aug 8, 2:05 PM MDTSpecial Weather StatementLBF40 min
Aug 11, 6:02 PM MDTSpecial Weather StatementLBF43 min
Aug 12, 1:36 PM MDTMesoscale DiscussionSPC114 min
Aug 12, 2:59 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 12, 5:16 PM MDTMesoscale DiscussionSPC89 min
Aug 14, 8:17 PM MDTSpecial Weather StatementLBF28 min
Aug 14, 8:26 PM MDTSpecial Weather StatementLBF49 min
Aug 14, 8:31 PM MDTSevere Thunderstorm WarningLBF44 min
Aug 14, 11:27 PM MDTSpecial Weather StatementLBF48 min
Aug 15, 2:52 PM MDTMesoscale DiscussionSPC113 min
Aug 15, 4:03 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 17, 5:00 PM MDTMesoscale DiscussionSPC2 hr
Aug 24, 4:40 PM MDTSpecial Weather StatementLBF50 min
Aug 24, 5:16 PM MDTSpecial Weather StatementLBF44 min
Aug 26, 1:13 PM MDTMesoscale DiscussionSPC3 hr
Aug 26, 2:04 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 26, 3:24 PM MDTMesoscale DiscussionSPC2 hr
Aug 26, 4:45 PM MDTSpecial Weather StatementLBF45 min
Aug 26, 6:17 PM MDTSevere Thunderstorm WarningLBF29 min
Aug 26, 6:40 PM MDTMesoscale DiscussionSPC2 hr
Sep 3, 2:30 AM MDTRed Flag WarningLBF18 hr
Sep 5, 12:49 PM MDTFrost AdvisoryLBF18 hr
Sep 15, 11:33 PM MDTSpecial Weather StatementLBF42 min
Sep 18, 2:05 PM MDTRed Flag WarningLBF25 hr
Sep 25, 2:22 PM MDTFrost AdvisoryLBF17 hr
Sep 26, 1:53 PM MDTFrost AdvisoryLBF17 hr
Oct 3, 2:52 AM MDTFreeze WatchLBF11 hr
Oct 3, 2:09 PM MDTFrost AdvisoryLBF18 hr
Oct 8, 2:06 AM MDTHard Freeze WatchLBF12 hr
Oct 8, 2:56 PM MDTHard Freeze WarningLBF42 hr
Oct 26, 12:33 PM MDTFire Weather WatchLBF20 hr
Nov 6, 2:36 PM MSTWinter Weather AdvisoryLBF16 hr
Nov 20, 10:07 AM MSTRed Flag WarningLBF7 hr
Dec 3, 3:24 AM MSTWinter Weather AdvisoryLBF38 hr
Dec 21, 2:23 AM MSTWinter Weather AdvisoryLBF15 hr
Dec 22, 9:05 PM MSTWinter Weather AdvisoryLBF29 hr
Dec 23, 1:55 PM MSTWind Chill AdvisoryLBF19 hr
Dec 24, 7:25 PM MSTWind Chill AdvisoryLBF7 hr
Dec 26, 1:40 PM MSTWind Chill AdvisoryLBF19 hr
Dec 29, 2:21 AM MSTWind Chill AdvisoryLBF33 hr
Dec 29, 10:55 AM MSTWind Chill WatchLBF16 hr
Dec 30, 2:38 AM MSTWind Chill WarningLBF56 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.