Alert archive / Kansas / Nemaha County

Weather alerts in Nemaha County, Kansas, 2018

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

Nemaha County and its neighbors

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

Alerts
133
Warnings
37
Watches
14
Advisories
31
Busiest month
June34 alerts
Busiest day
June 12, 201812 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 3 tornado warnings covering Nemaha County in 2018 had a tornado report inside them.

Nemaha County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings30100%0
Severe thunderstorm warnings261927%1283%26 min
Flash flood warnings110%0

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Topeka, KS: tornado warnings28968%2080%20 min
NWS Topeka, KS: severe thunderstorm warnings25212849%30581%26 min
NWS Topeka, KS: flash flood warnings261927%3795%102 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 6, 8:47 PM CSTWinter Weather AdvisoryTOP12 hr
Jan 10, 3:48 AM CSTWinter Weather AdvisoryTOP32 hr
Jan 11, 3:31 AM CSTWinter Storm WarningTOP8 hr
Jan 11, 4:20 AM CSTMesoscale DiscussionSPC4 hr
Jan 13, 12:44 PM CSTWinter Weather AdvisoryTOP21 hr
Jan 14, 3:14 PM CSTWind Chill AdvisoryTOP45 hr
Jan 21, 1:06 AM CSTDense Fog AdvisoryTOP11 hr
Jan 21, 2:57 PM CSTWinter Weather AdvisoryTOP27 hr
Jan 26, 3:44 AM CSTWind AdvisoryTOP14 hr
Feb 4, 9:30 AM CSTWinter Weather AdvisoryTOP5 hr
Feb 5, 2:55 PM CSTWinter Weather AdvisoryTOP30 hr
Feb 10, 3:31 AM CSTWinter Weather AdvisoryTOP24 hr
Feb 18, 2:55 AM CSTWind AdvisoryTOP15 hr
Feb 19, 3:45 AM CSTWinter Weather AdvisoryTOP32 hr
Feb 19, 11:25 PM CSTSpecial Weather StatementTOP35 min
Feb 20, 12:02 AM CSTSpecial Weather StatementTOP28 min
Feb 20, 3:17 PM CSTWinter Weather AdvisoryTOP57 hr
Feb 23, 1:51 PM CSTWinter Weather AdvisoryTOP24 hr
Mar 5, 3:24 AM CSTWind AdvisoryTOP15 hr
Mar 5, 3:51 AM CSTWind AdvisoryTOP39 hr
Mar 14, 3:40 AM CDTRed Flag WarningTOP15 hr
Mar 26, 2:37 AM CDTMesoscale DiscussionSPC2 hr
Mar 26, 5:24 AM CDTSpecial Weather StatementTOP51 min
Mar 26, 5:42 AM CDTSpecial Weather StatementTOP33 min
Mar 31, 3:10 AM CDTWinter Weather AdvisoryTOP38 hr
Apr 13, 2:06 PM CDTMesoscale DiscussionSPC2 hr
Apr 13, 3:18 PM CDTSevere Thunderstorm WarningTOP57 min
Apr 13, 3:31 PM CDTSevere Thunderstorm WarningTOP44 min
Apr 13, 4:09 PM CDTSevere Thunderstorm WarningTOP51 min
Apr 13, 4:11 PM CDTSevere Thunderstorm WarningTOP34 min
Apr 29, 3:34 AM CDTWind AdvisoryTOP41 hr
May 1, 2:47 PM CDTTornado WatchSPC9 hr
May 1, 5:00 PM CDTMesoscale DiscussionSPC2 hr
May 1, 7:24 PM CDTMesoscale DiscussionSPC2 hr
May 1, 9:06 PM CDTMesoscale DiscussionSPC54 min
May 1, 10:27 PM CDTTornado WarningTOP33 min
May 2, 12:43 PM CDTTornado WatchSPC9 hr
May 2, 5:08 PM CDTMesoscale DiscussionSPC97 min
May 2, 5:18 PM CDTMesoscale DiscussionSPC87 min
May 2, 6:03 PM CDTSevere Thunderstorm WarningTOP57 min
May 2, 9:20 PM CDTSpecial Weather StatementTOP40 min
May 3, 2:36 PM CDTMesoscale DiscussionSPC114 min
May 3, 2:57 PM CDTSevere Thunderstorm WatchSPC6 hr
May 3, 5:58 PM CDTMesoscale DiscussionSPC92 min
May 3, 6:14 PM CDTSevere Thunderstorm WarningTOP46 min
May 3, 6:57 PM CDTSevere Thunderstorm WarningTOP33 min
May 3, 7:43 PM CDTMesoscale DiscussionSPC62 min
May 13, 8:00 PM CDTMesoscale DiscussionSPC3 hr
May 16, 7:33 PM CDTSevere Thunderstorm WarningTOP27 min
May 18, 2:59 PM CDTSpecial Weather StatementTOP16 min
May 19, 1:42 PM CDTMesoscale DiscussionSPC3 hr
May 29, 2:01 PM CDTMesoscale DiscussionSPC89 min
May 29, 2:40 PM CDTSevere Thunderstorm WatchSPC7 hr
May 29, 5:04 PM CDTMesoscale DiscussionSPC116 min
May 29, 9:03 PM CDTMesoscale DiscussionSPC57 min
Jun 2, 12:50 AM CDTMesoscale DiscussionSPC55 min
Jun 2, 2:08 AM CDTSpecial Weather StatementTOP52 min
Jun 6, 8:45 PM CDTMesoscale DiscussionSPC90 min
Jun 7, 12:25 AM CDTSpecial Weather StatementTOP35 min
Jun 9, 6:41 PM CDTSevere Thunderstorm WarningTOP49 min
Jun 9, 7:29 PM CDTSevere Thunderstorm WarningTOP16 min
Jun 11, 6:12 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 11, 8:01 PM CDTSevere Thunderstorm WarningTOP59 min
Jun 11, 8:15 PM CDTSevere Thunderstorm WarningTOP60 min
Jun 11, 8:42 PM CDTTornado WarningTOP48 min
Jun 11, 8:57 PM CDTSevere Thunderstorm WarningTOP48 min
Jun 11, 9:03 PM CDTTornado WarningTOP27 min
Jun 11, 9:11 PM CDTSevere Thunderstorm WarningTOP64 min
Jun 11, 9:20 PM CDTSevere Thunderstorm WarningTOP55 min
Jun 11, 9:26 PM CDTSevere Thunderstorm WarningTOP49 min
Jun 11, 9:43 PM CDTSevere Thunderstorm WarningTOP32 min
Jun 11, 10:09 PM CDTAreal Flood AdvisoryTOP3 hr
Jun 11, 10:09 PM CDTSevere Thunderstorm WarningTOP66 min
Jun 11, 10:16 PM CDTSevere Thunderstorm WarningTOP59 min
Jun 14, 2:53 PM CDTHeat AdvisoryTOP4 days
Jun 18, 2:19 PM CDTMesoscale DiscussionSPC116 min
Jun 18, 5:03 PM CDTSpecial Weather StatementTOP27 min
Jun 18, 5:18 PM CDTAreal Flood AdvisoryTOP117 min
Jun 18, 5:47 PM CDTFlash Flood WarningTOP3 hr
Jun 20, 8:28 PM CDTSpecial Weather StatementTOP32 min
Jun 25, 3:38 PM CDTHeat AdvisoryTOP5 days
Jun 27, 12:13 PM CDTExcessive Heat WarningTOP3 days
Jun 30, 4:40 PM CDTMesoscale DiscussionSPC95 min
Jun 30, 4:53 PM CDTSevere Thunderstorm WarningTOP52 min
Jun 30, 4:57 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 30, 5:27 PM CDTSevere Thunderstorm WarningTOP33 min
Jun 30, 5:37 PM CDTSevere Thunderstorm WarningTOP38 min
Jun 30, 5:56 PM CDTSevere Thunderstorm WarningTOP19 min
Jun 30, 6:02 PM CDTSevere Thunderstorm WarningTOP58 min
Jun 30, 8:55 PM CDTMesoscale DiscussionSPC95 min
Jun 30, 10:30 PM CDTSpecial Weather StatementTOP30 min
Jul 2, 3:04 PM CDTHeat AdvisoryTOP53 hr
Jul 9, 2:29 PM CDTHeat AdvisoryTOP5 days
Jul 13, 3:38 PM CDTMesoscale DiscussionSPC97 min
Jul 19, 12:47 AM CDTMesoscale DiscussionSPC118 min
Jul 19, 1:00 AM CDTSevere Thunderstorm WatchSPC5 hr
Jul 19, 3:52 AM CDTMesoscale DiscussionSPC53 min
Aug 6, 5:44 PM CDTSpecial Weather StatementTOP31 min
Aug 6, 6:24 PM CDTSevere Thunderstorm WarningTOP37 min
Aug 6, 6:38 PM CDTMesoscale DiscussionSPC2 hr
Aug 16, 3:12 PM CDTMesoscale DiscussionSPC63 min
Aug 28, 9:42 AM CDTSpecial Weather StatementTOP33 min
Aug 28, 10:00 AM CDTSpecial Weather StatementTOP45 min
Aug 28, 1:50 PM CDTSpecial Weather StatementTOP25 min
Aug 28, 2:29 PM CDTSpecial Weather StatementTOP31 min
Aug 28, 9:59 PM CDTSpecial Weather StatementTOP31 min
Aug 31, 1:10 AM CDTMesoscale DiscussionSPC3 hr
Sep 2, 3:27 AM CDTFlash Flood WatchTOP34 hr
Sep 2, 3:20 PM CDTMesoscale DiscussionSPC115 min
Sep 2, 4:58 PM CDTSevere Thunderstorm WatchSPC4 hr
Sep 3, 1:06 PM CDTFlash Flood WatchTOP48 hr
Sep 20, 2:31 PM CDTMesoscale DiscussionSPC119 min
Sep 20, 3:11 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 20, 8:12 PM CDTSevere Thunderstorm WarningTOP63 min
Sep 20, 8:55 PM CDTSpecial Weather StatementTOP50 min
Oct 1, 2:21 AM CDTDense Fog AdvisoryTOP8 hr
Oct 3, 6:50 PM CDTWind AdvisoryTOP3 hr
Oct 5, 2:39 PM CDTMesoscale DiscussionSPC3 hr
Oct 6, 4:09 PM CDTFlood WatchTOP3 days
Oct 8, 1:49 PM CDTMesoscale DiscussionSPC116 min
Oct 13, 1:12 AM CDTDense Fog AdvisoryTOP9 hr
Oct 13, 3:46 AM CDTWinter Weather AdvisoryTOP46 hr
Oct 13, 2:37 PM CDTFreeze WatchTOP14 hr
Oct 14, 4:07 AM CDTFreeze WarningTOP30 hr
Oct 15, 3:56 AM CDTFreeze WarningTOP29 hr
Nov 7, 3:22 AM CSTWinter Weather AdvisoryTOP42 hr
Nov 17, 8:45 PM CSTWinter Weather AdvisoryTOP7 hr
Nov 23, 3:06 AM CSTWinter Storm WatchTOP25 hr
Nov 24, 4:01 AM CSTWinter Storm WarningTOP10 hr
Nov 24, 1:38 PM CSTBlizzard WarningTOP28 hr
Nov 25, 3:54 AM CSTMesoscale DiscussionSPC6 hr
Nov 25, 10:59 AM CSTMesoscale DiscussionSPC5 hr
Dec 1, 10:00 AM CSTWinter Weather AdvisoryTOP29 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 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.