Alert archive / Nebraska / Polk County

Weather alerts in Polk County, Nebraska, 2015

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

Polk County and its neighbors

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

Alerts
112
Warnings
27
Watches
19
Advisories
24
Busiest month
June23 alerts
Busiest day
June 5, 20156 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Polk County, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings12650%580%11 min
Flash flood warnings00

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Hastings, NE: tornado warnings381463%2576%14 min
NWS Hastings, NE: severe thunderstorm warnings28513852%32979%19 min
NWS Hastings, NE: flash flood warnings7357%3100%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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 3, 4:03 AM CSTWind Chill AdvisoryGID32 hr
Jan 3, 12:07 PM CSTWinter Weather AdvisoryGID13 hr
Jan 6, 2:03 PM CSTWind Chill AdvisoryGID22 hr
Jan 31, 4:10 AM CSTWinter Weather AdvisoryGID38 hr
Jan 31, 9:54 PM CSTWinter Storm WarningGID20 hr
Feb 1, 6:47 PM CSTWind Chill AdvisoryGID15 hr
Feb 3, 3:42 AM CSTWinter Weather AdvisoryGID32 hr
Feb 4, 4:24 AM CSTMesoscale DiscussionSPC4 hr
Feb 4, 6:49 AM CSTWinter Storm WarningGID5 hr
Feb 9, 3:56 AM CSTDense Fog AdvisoryGID9 hr
Feb 9, 6:23 PM CSTDense Fog AdvisoryGID10 hr
Feb 17, 8:59 AM CSTWinter Weather AdvisoryGID4 hr
Mar 11, 3:25 PM CDTFire Weather WatchGID12 hr
Mar 11, 3:25 PM CDTRed Flag WarningGID28 hr
Mar 14, 3:44 AM CDTFire Weather WatchGID11 hr
Mar 14, 2:57 PM CDTRed Flag WarningGID29 hr
Mar 16, 3:42 AM CDTRed Flag WarningGID17 hr
Mar 20, 3:03 AM CDTRed Flag WarningGID17 hr
Mar 25, 12:14 AM CDTDense Fog AdvisoryGID7 hr
Mar 28, 3:19 PM CDTFire Weather WatchGID14 hr
Mar 29, 4:53 AM CDTRed Flag WarningGID14 hr
Mar 30, 4:06 AM CDTRed Flag WarningGID15 hr
Apr 1, 3:50 PM CDTMesoscale DiscussionSPC115 min
Apr 1, 5:57 PM CDTSevere Thunderstorm WatchSPC7 hr
Apr 1, 8:25 PM CDTMesoscale DiscussionSPC95 min
Apr 1, 8:31 PM CDTSevere Thunderstorm WarningGID29 min
Apr 1, 8:59 PM CDTSevere Thunderstorm WarningGID31 min
Apr 1, 9:28 PM CDTSpecial Weather StatementGID62 min
Apr 3, 2:30 AM CDTFire Weather WatchGID13 hr
Apr 3, 3:09 PM CDTRed Flag WarningGID30 hr
Apr 12, 5:08 PM CDTSevere Thunderstorm WarningGID37 min
Apr 12, 5:33 PM CDTSevere Thunderstorm WarningGID27 min
Apr 12, 5:42 PM CDTMesoscale DiscussionSPC63 min
Apr 12, 5:58 PM CDTSevere Thunderstorm WarningGID32 min
Apr 12, 6:36 PM CDTSpecial Weather StatementGID24 min
May 2, 8:01 PM CDTMesoscale DiscussionSPC89 min
May 2, 8:31 PM CDTSevere Thunderstorm WarningGID29 min
May 2, 10:36 PM CDTSpecial Weather StatementGID24 min
May 3, 3:57 PM CDTMesoscale DiscussionSPC2 hr
May 6, 1:41 PM CDTTornado WatchSPC7 hr
May 6, 3:24 PM CDTMesoscale DiscussionSPC2 hr
May 6, 5:36 PM CDTMesoscale DiscussionSPC84 min
May 25, 5:08 PM CDTMesoscale DiscussionSPC67 min
Jun 3, 1:03 AM CDTSevere Thunderstorm WatchSPC3 hr
Jun 3, 2:07 AM CDTSpecial Weather StatementGID38 min
Jun 3, 2:44 AM CDTSpecial Weather StatementGID31 min
Jun 3, 3:01 AM CDTMesoscale DiscussionSPC89 min
Jun 4, 1:56 AM CDTMesoscale DiscussionSPC94 min
Jun 4, 7:24 PM CDTSevere Thunderstorm WarningGID51 min
Jun 4, 7:32 PM CDTSevere Thunderstorm WarningGID43 min
Jun 4, 8:10 PM CDTMesoscale DiscussionSPC65 min
Jun 4, 8:48 PM CDTAreal Flood AdvisoryGID6 hr
Jun 4, 9:55 PM CDTAreal Flood WarningGID15 hr
Jun 5, 12:01 PM CDTAreal Flood WarningGID72 hr
Jun 6, 3:40 PM CDTTornado WatchSPC5 hr
Jun 6, 6:34 PM CDTMesoscale DiscussionSPC116 min
Jun 6, 8:11 PM CDTMesoscale DiscussionSPC64 min
Jun 10, 2:37 PM CDTSevere Thunderstorm WatchSPC9 hr
Jun 10, 3:13 PM CDTMesoscale DiscussionSPC92 min
Jun 10, 6:18 PM CDTMesoscale DiscussionSPC87 min
Jun 10, 8:01 PM CDTSpecial Weather StatementGID44 min
Jun 10, 8:26 PM CDTMesoscale DiscussionSPC64 min
Jun 10, 8:35 PM CDTSevere Thunderstorm WarningGID25 min
Jun 18, 7:12 AM CDTSpecial Weather StatementGID48 min
Jun 24, 12:39 AM CDTMesoscale DiscussionSPC66 min
Jun 24, 10:19 AM CDTMesoscale DiscussionSPC116 min
Jul 11, 2:44 PM CDTHeat AdvisoryGID29 hr
Jul 12, 4:51 PM CDTMesoscale DiscussionSPC114 min
Jul 17, 4:03 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 17, 5:43 PM CDTMesoscale DiscussionSPC92 min
Jul 17, 8:57 PM CDTMesoscale DiscussionSPC3 hr
Jul 23, 3:14 PM CDTHeat AdvisoryGID29 hr
Jul 24, 10:34 PM CDTSevere Thunderstorm WarningGID41 min
Jul 24, 11:13 PM CDTSevere Thunderstorm WarningGID47 min
Jul 31, 2:45 PM CDTMesoscale DiscussionSPC3 hr
Jul 31, 3:28 PM CDTSevere Thunderstorm WarningGID32 min
Jul 31, 3:58 PM CDTSpecial Weather StatementGID32 min
Aug 16, 2:42 PM CDTMesoscale DiscussionSPC2 hr
Aug 16, 8:39 PM CDTAreal Flood AdvisoryGID111 min
Aug 17, 11:32 PM CDTAreal Flood AdvisoryGID38 hr
Aug 18, 6:08 AM CDTDense Fog AdvisoryGID101 min
Aug 22, 2:55 PM CDTMesoscale DiscussionSPC65 min
Aug 22, 3:48 PM CDTTornado WatchSPC8 hr
Aug 27, 5:36 AM CDTMesoscale DiscussionSPC2 hr
Aug 27, 5:41 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 27, 7:58 PM CDTMesoscale DiscussionSPC92 min
Aug 30, 3:47 AM CDTDense Fog AdvisoryGID6 hr
Sep 9, 8:12 PM CDTSpecial Weather StatementGID33 min
Sep 10, 2:59 PM CDTSevere Thunderstorm WatchSPC5 hr
Sep 10, 5:27 PM CDTMesoscale DiscussionSPC93 min
Sep 18, 9:25 AM CDTMesoscale DiscussionSPC65 min
Sep 22, 9:41 PM CDTSpecial Weather StatementGID19 min
Oct 11, 7:24 PM CDTSpecial Weather StatementGID81 min
Oct 11, 7:50 PM CDTSpecial Weather StatementGID40 min
Oct 12, 3:16 AM CDTRed Flag WarningGID15 hr
Oct 13, 3:21 AM CDTRed Flag WarningGID15 hr
Oct 14, 2:51 PM CDTFreeze WatchGID13 hr
Oct 15, 3:32 AM CDTFreeze WarningGID29 hr
Nov 9, 3:33 PM CSTHigh Wind WatchGID23 hr
Nov 10, 2:17 PM CSTHigh Wind WarningGID28 hr
Nov 11, 3:43 AM CSTWinter Weather AdvisoryGID14 hr
Nov 24, 3:53 PM CSTWinter Storm WatchGID24 hr
Nov 24, 3:53 PM CSTWinter Weather AdvisoryGID56 hr
Nov 26, 7:04 AM CSTMesoscale DiscussionSPC5 hr
Nov 28, 3:13 PM CSTWinter Storm WatchGID13 hr
Nov 28, 3:13 PM CSTWinter Weather AdvisoryGID46 hr
Dec 12, 4:13 AM CSTWinter Storm WatchGID24 hr
Dec 13, 4:33 AM CSTWinter Weather AdvisoryGID25 hr
Dec 15, 3:22 PM CSTDense Fog AdvisoryGID7 hr
Dec 25, 3:52 PM CSTWinter Weather AdvisoryGID20 hr
Dec 26, 3:40 PM CSTWinter Storm WatchGID23 hr
Dec 27, 3:01 PM CSTWinter Weather AdvisoryGID24 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.