Alert archive / Nebraska / Sheridan County

Weather alerts in Sheridan County, Nebraska, 2011

164 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts
164
Warnings
48
Watches
37
Advisories
37
Busiest month
June35 alerts
Busiest day
June 26, 20118 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 Sheridan County in 2011 had a tornado report inside them.

Sheridan County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings312035%3491%19 min
Flash flood warnings110%1100%236 min

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS North Platte, NE: tornado warnings581181%2952%12 min
NWS North Platte, NE: severe thunderstorm warnings33419940%43384%21 min
NWS North Platte, NE: flash flood warnings17853%1560%119 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 8, 2:46 AM MSTWinter Weather AdvisoryLBF66 hr
Jan 10, 11:26 AM MSTWind Chill AdvisoryLBF24 hr
Jan 18, 11:57 AM MSTWinter Weather AdvisoryLBF32 hr
Jan 20, 2:16 AM MSTWind Chill AdvisoryLBF7 hr
Jan 30, 2:28 PM MSTWinter Weather AdvisoryLBF25 hr
Jan 31, 2:31 AM MSTWind Chill WarningLBF56 hr
Jan 31, 2:31 AM MSTWind Chill AdvisoryLBF13 hr
Feb 2, 2:22 PM MSTWind Chill AdvisoryLBF19 hr
Feb 7, 2:52 AM MSTWinter Weather AdvisoryLBF36 hr
Feb 7, 3:23 PM MSTWind Chill AdvisoryLBF20 hr
Feb 8, 12:26 PM MSTWind Chill AdvisoryLBF22 hr
Feb 13, 2:46 AM MSTWind AdvisoryLBF14 hr
Feb 17, 2:49 AM MSTWind AdvisoryLBF14 hr
Feb 17, 11:46 AM MSTRed Flag WarningLBF5 hr
Feb 18, 11:55 AM MSTWinter Storm WatchLBF27 hr
Feb 19, 2:38 PM MSTWinter Storm WarningLBF24 hr
Feb 24, 4:47 AM MSTWinter Weather AdvisoryLBF26 hr
Mar 5, 10:15 PM MSTWinter Weather AdvisoryLBF41 hr
Mar 11, 3:05 AM MSTWind AdvisoryLBF11 hr
Mar 17, 2:44 PM MDTWinter Weather AdvisoryLBF12 hr
Mar 19, 1:51 AM MDTWind AdvisoryLBF16 hr
Mar 21, 5:42 PM MDTFire Weather WatchLBF9 hr
Mar 23, 3:08 AM MDTWind AdvisoryLBF15 hr
Apr 1, 1:07 PM MDTFire Weather WatchLBF14 hr
Apr 2, 2:43 AM MDTRed Flag WarningLBF17 hr
Apr 3, 2:22 AM MDTWind AdvisoryLBF34 hr
Apr 13, 3:02 PM MDTWinter Storm WatchLBF23 hr
Apr 14, 2:09 PM MDTWinter Storm WarningLBF24 hr
Apr 14, 5:19 PM MDTMesoscale DiscussionSPC4 hr
Apr 18, 2:52 PM MDTWinter Weather AdvisoryLBF14 hr
Apr 22, 2:30 AM MDTWind AdvisoryLBF19 hr
Apr 29, 2:14 PM MDTWind AdvisoryLBF31 hr
May 8, 2:21 PM MDTRed Flag WarningLBF30 hr
May 9, 2:26 PM MDTSevere Thunderstorm WatchSPC7 hr
May 9, 8:32 PM MDTTornado WarningLBF28 min
May 9, 8:34 PM MDTSevere Thunderstorm WatchSPC5 hr
May 9, 9:02 PM MDTSevere Thunderstorm WarningLBF28 min
May 12, 2:29 AM MDTWind AdvisoryLBF17 hr
May 17, 2:02 AM MDTWind AdvisoryLBF16 hr
May 23, 2:04 PM MDTFlash Flood WatchLBF43 hr
May 30, 4:50 PM MDTSevere Thunderstorm WarningLBF40 min
May 30, 5:25 PM MDTSevere Thunderstorm WarningLBF50 min
Jun 2, 5:03 PM MDTMesoscale DiscussionSPC87 min
Jun 7, 9:45 AM MDTRed Flag WarningLBF10 hr
Jun 11, 1:40 PM MDTMesoscale DiscussionSPC2 hr
Jun 11, 3:35 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 12, 12:52 PM MDTMesoscale DiscussionSPC53 min
Jun 12, 3:53 PM MDTMesoscale DiscussionSPC67 min
Jun 13, 1:53 PM MDTMesoscale DiscussionSPC2 hr
Jun 13, 4:24 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 16, 1:55 PM MDTSevere Thunderstorm WatchSPC9 hr
Jun 16, 4:49 PM MDTMesoscale DiscussionSPC86 min
Jun 16, 4:59 PM MDTSevere Thunderstorm WarningLBF61 min
Jun 16, 5:29 PM MDTSevere Thunderstorm WarningLBF46 min
Jun 16, 5:45 PM MDTSevere Thunderstorm WarningLBF45 min
Jun 20, 2:55 AM MDTFlash Flood WatchLBF24 hr
Jun 24, 2:41 PM MDTFlash Flood WatchLBF15 hr
Jun 24, 4:57 PM MDTMesoscale DiscussionSPC2 hr
Jun 24, 5:46 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 24, 5:55 PM MDTSevere Thunderstorm WarningLBF50 min
Jun 24, 7:13 PM MDTSevere Thunderstorm WarningLBF47 min
Jun 25, 5:21 PM MDTMesoscale DiscussionSPC84 min
Jun 25, 7:14 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 1:42 AM MDTSevere Thunderstorm WarningLBF63 min
Jun 26, 9:44 AM MDTMesoscale DiscussionSPC2 hr
Jun 26, 11:07 AM MDTSevere Thunderstorm WarningLBF38 min
Jun 26, 12:03 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 26, 1:30 PM MDTMesoscale DiscussionSPC2 hr
Jun 26, 4:59 PM MDTSevere Thunderstorm WarningLBF61 min
Jun 26, 5:38 PM MDTSevere Thunderstorm WarningLBF52 min
Jun 26, 6:25 PM MDTMesoscale DiscussionSPC65 min
Jun 26, 6:26 PM MDTSevere Thunderstorm WarningLBF34 min
Jun 26, 6:53 PM MDTSevere Thunderstorm WarningLBF37 min
Jun 26, 6:56 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 26, 7:37 PM MDTSevere Thunderstorm WarningLBF38 min
Jun 30, 4:17 PM MDTMesoscale DiscussionSPC118 min
Jun 30, 4:39 PM MDTSevere Thunderstorm WatchSPC5 hr
Jun 30, 6:33 PM MDTSevere Thunderstorm WarningLBF57 min
Jun 30, 7:25 PM MDTMesoscale DiscussionSPC2 hr
Jul 1, 2:47 PM MDTMesoscale DiscussionSPC58 min
Jul 2, 6:48 PM MDTMesoscale DiscussionSPC117 min
Jul 4, 7:49 PM MDTSevere Thunderstorm WarningLBF41 min
Jul 5, 1:17 PM MDTMesoscale DiscussionSPC73 min
Jul 6, 2:56 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 6, 5:16 PM MDTMesoscale DiscussionSPC119 min
Jul 6, 5:31 PM MDTSevere Thunderstorm WarningLBF44 min
Jul 6, 6:15 PM MDTSevere Thunderstorm WarningLBF45 min
Jul 8, 3:29 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 3:48 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 11, 1:50 PM MDTMesoscale DiscussionSPC85 min
Jul 11, 2:07 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 11, 3:19 PM MDTSevere Thunderstorm WarningLBF56 min
Jul 11, 4:01 PM MDTMesoscale DiscussionSPC29 min
Jul 11, 4:04 PM MDTFlash Flood WarningLBF6 hr
Jul 11, 4:06 PM MDTTornado WatchSPC5 hr
Jul 11, 4:12 PM MDTSevere Thunderstorm WarningLBF63 min
Jul 11, 5:14 PM MDTSevere Thunderstorm WarningLBF61 min
Jul 11, 6:14 PM MDTSevere Thunderstorm WarningLBF61 min
Jul 11, 6:54 PM MDTMesoscale DiscussionSPC66 min
Jul 14, 2:43 PM MDTSevere Thunderstorm WatchSPC6 hr
Jul 14, 8:05 PM MDTMesoscale DiscussionSPC55 min
Jul 19, 10:30 PM MDTSevere Thunderstorm WarningLBF45 min
Jul 25, 8:50 PM MDTSevere Thunderstorm WarningLBF29 min
Jul 29, 12:59 PM MDTMesoscale DiscussionSPC91 min
Jul 29, 4:46 PM MDTMesoscale DiscussionSPC59 min
Jul 31, 3:33 AM MDTHeat AdvisoryLBF15 hr
Aug 4, 6:53 PM MDTSevere Thunderstorm WarningLBF67 min
Aug 5, 4:25 PM MDTMesoscale DiscussionSPC2 hr
Aug 5, 6:12 PM MDTSevere Thunderstorm WarningLBF46 min
Aug 5, 6:41 PM MDTSevere Thunderstorm WarningLBF38 min
Aug 7, 12:23 PM MDTMesoscale DiscussionSPC67 min
Aug 7, 1:58 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 7, 5:35 PM MDTMesoscale DiscussionSPC115 min
Aug 7, 5:58 PM MDTSevere Thunderstorm WarningLBF47 min
Aug 8, 2:09 PM MDTMesoscale DiscussionSPC66 min
Aug 8, 3:52 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 8, 5:27 PM MDTMesoscale DiscussionSPC2 hr
Aug 9, 9:25 AM MDTMesoscale DiscussionSPC95 min
Aug 10, 3:42 PM MDTMesoscale DiscussionSPC63 min
Aug 10, 4:03 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 10, 5:54 PM MDTMesoscale DiscussionSPC66 min
Aug 11, 3:15 PM MDTMesoscale DiscussionSPC60 min
Aug 11, 3:38 PM MDTTornado WatchSPC9 hr
Aug 11, 8:22 PM MDTMesoscale DiscussionSPC53 min
Aug 12, 12:24 AM MDTSevere Thunderstorm WarningLBF66 min
Aug 14, 1:59 PM MDTMesoscale DiscussionSPC91 min
Aug 14, 2:29 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 14, 6:44 PM MDTMesoscale DiscussionSPC91 min
Aug 17, 2:00 PM MDTMesoscale DiscussionSPC2 hr
Aug 17, 2:37 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 17, 4:43 PM MDTMesoscale DiscussionSPC62 min
Aug 25, 3:59 PM MDTMesoscale DiscussionSPC91 min
Aug 29, 5:33 PM MDTSevere Thunderstorm WarningLBF57 min
Sep 20, 8:12 PM MDTFrost AdvisoryLBF11 hr
Sep 29, 10:47 AM MDTFrost AdvisoryLBF21 hr
Oct 3, 3:16 PM MDTFire Weather WatchLBF13 hr
Oct 3, 3:16 PM MDTRed Flag WarningLBF35 hr
Oct 5, 3:22 AM MDTWind AdvisoryLBF15 hr
Oct 5, 2:29 PM MDTWind AdvisoryLBF34 hr
Oct 5, 6:40 PM MDTHigh Wind WatchLBF8 hr
Oct 6, 2:04 AM MDTHigh Wind WarningLBF22 hr
Oct 6, 2:19 PM MDTMesoscale DiscussionSPC116 min
Oct 6, 2:32 PM MDTSevere Thunderstorm WatchSPC9 hr
Oct 6, 4:55 PM MDTMesoscale DiscussionSPC95 min
Oct 7, 2:50 AM MDTWind AdvisoryLBF12 hr
Oct 7, 3:07 AM MDTRed Flag WarningLBF15 hr
Oct 14, 2:23 PM MDTFire Weather WatchLBF14 hr
Oct 17, 2:26 PM MDTFreeze WatchLBF24 hr
Oct 17, 2:26 PM MDTFreeze WarningLBF19 hr
Oct 31, 11:57 AM MDTWinter Storm WatchLBF16 hr
Nov 1, 3:15 AM MDTWinter Weather AdvisoryLBF32 hr
Nov 12, 10:33 AM MSTWind AdvisoryLBF5 hr
Nov 12, 11:06 AM MSTWind AdvisoryLBF23 hr
Nov 19, 5:42 AM MSTWinter Weather AdvisoryLBF5 hr
Nov 24, 12:09 PM MSTRed Flag WarningLBF4 hr
Nov 24, 2:09 PM MSTHigh Wind WatchLBF24 hr
Nov 25, 3:35 AM MSTFire Weather WatchLBF11 hr
Nov 25, 2:14 PM MSTHigh Wind WarningLBF24 hr
Nov 25, 2:34 PM MSTRed Flag WarningLBF26 hr
Nov 26, 2:05 PM MSTWind AdvisoryLBF3 hr
Dec 1, 2:52 AM MSTWinter Weather AdvisoryLBF5 hr
Dec 30, 2:18 AM MSTHigh Wind WatchLBF9 hr
Dec 30, 11:30 AM MSTHigh Wind WarningLBF33 hr
Dec 30, 11:30 AM MSTWind AdvisoryLBF33 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 archive20102012

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.