Alert archive / Nebraska / Sherman County

Weather alerts in Sherman County, Nebraska, 2018

116 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sherman County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
116
Warnings
30
Watches
21
Advisories
27
Busiest month
June29 alerts
Busiest day
June 2, 20189 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 Sherman County in 2018 had a tornado report inside them.

Sherman County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings171135%10100%32 min
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Hastings, NE: tornado warnings29776%1369%15 min
NWS Hastings, NE: severe thunderstorm warnings24011353%33784%23 min
NWS Hastings, NE: flash flood warnings9189%1100%34 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 9, 3:09 AM CSTWinter Storm WatchGID24 hr
Jan 9, 3:30 PM CSTWinter Weather AdvisoryGID43 hr
Jan 14, 2:37 PM CSTWind Chill AdvisoryGID45 hr
Jan 19, 3:37 AM CSTWinter Storm WatchGID35 hr
Jan 20, 4:02 AM CSTWinter Storm WarningGID24 hr
Jan 20, 2:52 PM CSTWinter Weather AdvisoryGID51 hr
Jan 21, 3:52 AM CSTBlizzard WarningGID38 hr
Jan 22, 2:02 AM CSTMesoscale DiscussionSPC6 hr
Feb 5, 7:29 AM CSTWinter Weather AdvisoryGID6 hr
Feb 9, 2:39 PM CSTWinter Weather AdvisoryGID12 hr
Feb 10, 5:25 AM CSTWind Chill AdvisoryGID5 hr
Feb 18, 3:31 AM CSTWinter Weather AdvisoryGID29 hr
Feb 21, 2:51 PM CSTWinter Weather AdvisoryGID33 hr
Feb 22, 2:23 PM CSTWinter Storm WatchGID13 hr
Feb 23, 3:50 AM CSTWinter Weather AdvisoryGID36 hr
Mar 3, 3:16 PM CSTHigh Wind WatchGID24 hr
Mar 4, 3:28 PM CSTHigh Wind WatchGID34 hr
Mar 4, 3:28 PM CSTHigh Wind WarningGID29 hr
Mar 5, 1:41 PM CSTHigh Wind WarningGID25 hr
Mar 21, 4:25 AM CDTDense Fog AdvisoryGID8 hr
Mar 30, 3:25 PM CDTWinter Weather AdvisoryGID46 hr
Mar 31, 3:31 AM CDTWinter Storm WarningGID24 hr
Apr 4, 3:26 PM CDTWinter Weather AdvisoryGID49 hr
Apr 10, 3:56 AM CDTFire Weather WatchGID25 hr
Apr 11, 4:50 AM CDTRed Flag WarningGID15 hr
Apr 11, 3:18 PM CDTWinter Storm WatchGID37 hr
Apr 12, 11:54 AM CDTBlizzard WarningGID55 hr
Apr 13, 4:14 AM CDTWinter Weather AdvisoryGID42 hr
Apr 30, 5:40 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 30, 8:13 PM CDTMesoscale DiscussionSPC92 min
May 3, 11:58 AM CDTSpecial Weather StatementGID47 min
May 3, 12:43 PM CDTSpecial Weather StatementGID47 min
May 5, 7:02 PM CDTSpecial Weather StatementGID43 min
May 10, 7:39 PM CDTMesoscale DiscussionSPC2 hr
May 10, 7:59 PM CDTSevere Thunderstorm WatchSPC9 hr
May 10, 10:57 PM CDTSevere Thunderstorm WarningGID63 min
May 10, 11:16 PM CDTMesoscale DiscussionSPC89 min
May 10, 11:44 PM CDTSevere Thunderstorm WarningGID61 min
May 11, 12:06 AM CDTSevere Thunderstorm WarningGID39 min
May 18, 9:14 AM CDTSpecial Weather StatementGID61 min
May 18, 10:09 AM CDTSpecial Weather StatementGID51 min
May 18, 2:25 PM CDTFlood WatchGID25 hr
May 21, 12:56 AM CDTDense Fog AdvisoryGID9 hr
Jun 1, 2:56 PM CDTMesoscale DiscussionSPC2 hr
Jun 1, 3:57 PM CDTTornado WatchSPC7 hr
Jun 1, 7:08 PM CDTMesoscale DiscussionSPC2 hr
Jun 1, 9:04 PM CDTSevere Thunderstorm WarningGID41 min
Jun 1, 9:24 PM CDTSevere Thunderstorm WarningGID51 min
Jun 1, 9:32 PM CDTMesoscale DiscussionSPC118 min
Jun 1, 10:05 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 1, 10:14 PM CDTSevere Thunderstorm WarningGID46 min
Jun 1, 10:18 PM CDTSevere Thunderstorm WarningGID42 min
Jun 1, 10:24 PM CDTTornado WarningGID36 min
Jun 1, 11:00 PM CDTSevere Thunderstorm WarningGID45 min
Jun 6, 3:23 PM CDTSevere Thunderstorm WatchSPC9 hr
Jun 6, 8:45 PM CDTMesoscale DiscussionSPC90 min
Jun 7, 1:00 AM CDTSpecial Weather StatementGID60 min
Jun 8, 11:51 PM CDTMesoscale DiscussionSPC84 min
Jun 9, 12:37 AM CDTSevere Thunderstorm WarningGID23 min
Jun 9, 1:00 AM CDTSevere Thunderstorm WarningGID30 min
Jun 9, 1:16 AM CDTMesoscale DiscussionSPC89 min
Jun 9, 1:41 AM CDTSpecial Weather StatementGID34 min
Jun 18, 3:05 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 18, 5:46 PM CDTMesoscale DiscussionSPC119 min
Jun 19, 3:09 PM CDTMesoscale DiscussionSPC2 hr
Jun 19, 6:12 PM CDTMesoscale DiscussionSPC2 hr
Jun 23, 9:01 PM CDTSpecial Weather StatementLBF29 min
Jun 23, 9:46 PM CDTSpecial Weather StatementGID29 min
Jun 27, 2:30 PM CDTHeat AdvisoryGID54 hr
Jun 30, 3:11 PM CDTMesoscale DiscussionSPC94 min
Jun 30, 3:26 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 30, 6:09 PM CDTMesoscale DiscussionSPC96 min
Jun 30, 8:55 PM CDTMesoscale DiscussionSPC95 min
Jun 30, 9:40 PM CDTSevere Thunderstorm WarningGID50 min
Jul 2, 6:15 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 2, 8:52 PM CDTMesoscale DiscussionSPC83 min
Jul 14, 4:33 AM CDTDense Fog AdvisoryGID5 hr
Jul 18, 4:59 PM CDTMesoscale DiscussionSPC91 min
Jul 18, 6:14 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 18, 7:51 PM CDTSevere Thunderstorm WarningGID39 min
Jul 18, 8:04 PM CDTSpecial Weather StatementLBF41 min
Jul 18, 8:21 PM CDTSevere Thunderstorm WarningGID39 min
Jul 18, 8:58 PM CDTSevere Thunderstorm WarningGID17 min
Jul 18, 9:21 PM CDTMesoscale DiscussionSPC114 min
Jul 18, 9:32 PM CDTSevere Thunderstorm WarningGID43 min
Jul 23, 12:37 AM CDTSpecial Weather StatementLBF23 min
Jul 23, 12:39 AM CDTSpecial Weather StatementGID51 min
Jul 23, 1:02 AM CDTSpecial Weather StatementLBF43 min
Jul 25, 7:51 PM CDTMesoscale DiscussionSPC84 min
Jul 28, 9:24 PM CDTSevere Thunderstorm WarningGID36 min
Aug 6, 2:31 PM CDTMesoscale DiscussionSPC89 min
Aug 8, 5:43 AM CDTMesoscale DiscussionSPC62 min
Aug 15, 2:52 PM CDTMesoscale DiscussionSPC2 hr
Aug 16, 3:50 AM CDTSevere Thunderstorm WarningGID25 min
Aug 30, 8:26 AM CDTDense Fog AdvisoryGID3 hr
Sep 19, 5:31 PM CDTMesoscale DiscussionSPC119 min
Sep 25, 2:06 PM CDTFrost AdvisoryGID19 hr
Oct 5, 2:49 PM CDTFrost AdvisoryGID19 hr
Oct 9, 2:21 PM CDTFreeze WatchGID14 hr
Oct 10, 4:20 AM CDTFreeze WarningGID30 hr
Nov 6, 2:23 PM CSTWinter Weather AdvisoryGID52 hr
Nov 23, 3:30 AM CSTWinter Storm WatchGID10 hr
Nov 23, 1:39 PM CSTWinter Weather AdvisoryGID49 hr
Nov 29, 4:04 AM CSTWinter Storm WatchGID10 hr
Nov 29, 2:09 PM CSTWinter Storm WarningGID61 hr
Nov 29, 2:09 PM CSTWinter Weather AdvisoryGID3 days
Nov 29, 9:12 PM CSTDense Fog AdvisoryGID14 hr
Dec 1, 2:17 AM CSTMesoscale DiscussionSPC6 hr
Dec 8, 5:46 AM CSTDense Fog AdvisoryGID4 hr
Dec 24, 2:23 PM CSTWinter Storm WatchGID37 hr
Dec 25, 5:53 PM CSTDense Fog AdvisoryGID10 hr
Dec 26, 3:43 AM CSTWinter Weather AdvisoryGID24 hr
Dec 26, 2:32 PM CSTWinter Storm WarningGID27 hr
Dec 27, 3:57 AM CSTBlizzard WarningGID8 hr
Dec 27, 3:57 AM CSTWinter Storm WarningGID14 hr
Dec 31, 3:06 PM CSTAreal Flood AdvisoryGID3 days

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 archive20172019

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.