Alert archive / Nebraska / Knox County

Weather alerts in Knox County, Nebraska, 2008

136 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Knox County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts
136
Warnings
41
Watches
22
Advisories
34
Busiest month
June36 alerts
Busiest day
June 5, 200811 alerts

Over time

By month

Warning verification

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

Knox County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings30873%4100%28 min
Flash flood warnings10100%0

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Omaha, NE: tornado warnings642463%5576%17 min
NWS Omaha, NE: severe thunderstorm warnings45715067%32282%20 min
NWS Omaha, NE: flash flood warnings651774%2789%86 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 19, 3:44 PM CSTSnow AdvisoryOAX47 hr
Jan 22, 3:46 PM CSTBlowing Snow AdvisoryOAX25 hr
Jan 28, 3:32 PM CSTWinter Weather AdvisoryOAX24 hr
Jan 28, 3:43 PM CSTWind AdvisoryOAX23 hr
Feb 3, 9:51 PM CSTWinter Weather AdvisoryOAX14 hr
Feb 9, 3:30 PM CSTWind Chill AdvisoryOAX21 hr
Feb 11, 8:54 AM CSTSnow AdvisoryOAX15 hr
Feb 11, 12:32 PM CSTMesoscale DiscussionSPC5 hr
Feb 16, 4:06 PM CSTWind AdvisoryOAX26 hr
Feb 19, 3:37 PM CSTWind Chill AdvisoryOAX19 hr
Feb 20, 3:55 AM CSTWind Chill WarningOAX6 hr
Feb 24, 3:37 PM CSTWinter Weather AdvisoryOAX24 hr
Feb 25, 1:43 PM CSTRiver Flood WarningOAX19 hr
Mar 2, 4:07 AM CSTWind AdvisoryOAX14 hr
Mar 16, 3:10 PM CDTSnow AdvisoryOAX22 hr
Mar 29, 3:52 AM CDTWind AdvisoryOAX12 hr
Mar 31, 2:30 AM CDTMesoscale DiscussionSPC5 hr
Mar 31, 2:41 AM CDTSnow AdvisoryOAX12 hr
Apr 9, 4:10 AM CDTWinter Storm WatchOAX32 hr
Apr 10, 12:00 PM CDTWinter Storm WarningOAX23 hr
Apr 11, 3:28 AM CDTWind AdvisoryOAX16 hr
Apr 14, 3:27 PM CDTWind AdvisoryOAX30 hr
Apr 20, 3:49 AM CDTWind AdvisoryOAX15 hr
Apr 25, 6:06 AM CDTMesoscale DiscussionSPC6 hr
Apr 25, 9:55 AM CDTWinter Weather AdvisoryOAX6 hr
May 1, 3:28 PM CDTMesoscale DiscussionSPC92 min
May 1, 4:39 PM CDTSevere Thunderstorm WarningOAX40 min
May 6, 10:56 AM CDTMesoscale DiscussionSPC94 min
May 6, 12:03 PM CDTSevere Thunderstorm WatchSPC7 hr
May 6, 2:06 PM CDTSevere Thunderstorm WarningOAX24 min
May 6, 2:28 PM CDTSevere Thunderstorm WarningOAX47 min
May 10, 4:07 AM CDTWind AdvisoryOAX27 hr
May 22, 6:37 AM CDTAreal Flood AdvisoryOAX82 days
May 23, 3:49 PM CDTFlash Flood WatchOAX28 hr
May 24, 2:17 PM CDTMesoscale DiscussionSPC118 min
May 24, 3:08 PM CDTTornado WatchSPC6 hr
May 24, 5:43 PM CDTSevere Thunderstorm WarningOAX32 min
May 24, 6:33 PM CDTMesoscale DiscussionSPC117 min
May 28, 11:41 PM CDTMesoscale DiscussionSPC94 min
May 29, 5:32 AM CDTMesoscale DiscussionSPC118 min
May 29, 5:35 AM CDTFlash Flood WatchOAX22 hr
May 29, 8:33 AM CDTAreal Flood AdvisoryOAX148 days
May 29, 2:30 PM CDTTornado Watch PDSSPC8 hr
May 29, 3:55 PM CDTMesoscale DiscussionSPC95 min
May 29, 5:41 PM CDTSevere Thunderstorm WarningOAX49 min
May 29, 5:55 PM CDTMesoscale DiscussionSPC35 min
May 29, 6:13 PM CDTFlash Flood WarningOAX4 hr
May 29, 7:06 PM CDTSevere Thunderstorm WarningOAX39 min
May 29, 7:22 PM CDTSevere Thunderstorm WarningOAX23 min
May 29, 9:38 PM CDTMesoscale DiscussionSPC37 min
Jun 3, 1:19 AM CDTSevere Thunderstorm WarningOAX26 min
Jun 3, 1:39 AM CDTSevere Thunderstorm WarningOAX36 min
Jun 3, 1:57 AM CDTSevere Thunderstorm WatchSPC3 hr
Jun 4, 3:30 PM CDTFlash Flood WatchOAX31 hr
Jun 4, 4:09 PM CDTMesoscale DiscussionSPC66 min
Jun 5, 10:11 AM CDTMesoscale DiscussionSPC94 min
Jun 5, 10:41 AM CDTSevere Thunderstorm WarningOAX49 min
Jun 5, 10:55 AM CDTTornado Watch PDSSPC8 hr
Jun 5, 11:24 AM CDTSevere Thunderstorm WarningOAX36 min
Jun 5, 11:34 AM CDTSevere Thunderstorm WarningOAX41 min
Jun 5, 12:17 PM CDTSevere Thunderstorm WarningOAX28 min
Jun 5, 12:44 PM CDTMesoscale DiscussionSPC91 min
Jun 5, 5:50 PM CDTTornado Watch PDSSPC7 hr
Jun 5, 6:08 PM CDTSevere Thunderstorm WarningOAX52 min
Jun 5, 6:16 PM CDTSevere Thunderstorm WarningOAX44 min
Jun 5, 6:59 PM CDTSevere Thunderstorm WarningOAX46 min
Jun 6, 8:24 AM CDTRiver Flood WarningOAX27 hr
Jun 7, 4:30 AM CDTFlash Flood WatchOAX39 hr
Jun 7, 10:15 PM CDTMesoscale DiscussionSPC90 min
Jun 7, 10:34 PM CDTSevere Thunderstorm WarningOAX41 min
Jun 7, 11:01 PM CDTMesoscale DiscussionSPC59 min
Jun 7, 11:11 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 17, 3:54 PM CDTMesoscale DiscussionSPC66 min
Jun 19, 5:45 PM CDTSevere Thunderstorm WarningOAX45 min
Jun 21, 3:05 PM CDTMesoscale DiscussionSPC85 min
Jun 21, 6:32 PM CDTSevere Thunderstorm WarningOAX58 min
Jun 21, 7:13 PM CDTSevere Thunderstorm WarningOAX62 min
Jun 21, 7:41 PM CDTMesoscale DiscussionSPC64 min
Jun 25, 1:36 AM CDTMesoscale DiscussionSPC84 min
Jun 26, 3:48 AM CDTMesoscale DiscussionSPC87 min
Jun 26, 6:16 AM CDTSevere Thunderstorm WarningOAX44 min
Jun 26, 6:38 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 7:51 AM CDTMesoscale DiscussionSPC84 min
Jun 26, 9:53 AM CDTMesoscale DiscussionSPC97 min
Jun 26, 9:46 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 28, 3:52 AM CDTWind AdvisoryOAX14 hr
Jul 5, 2:48 AM CDTMesoscale DiscussionSPC117 min
Jul 6, 3:05 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 6, 11:13 PM CDTMesoscale DiscussionSPC2 hr
Jul 7, 1:36 PM CDTMesoscale DiscussionSPC114 min
Jul 15, 2:37 PM CDTMesoscale DiscussionSPC83 min
Jul 15, 4:30 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 15, 4:43 PM CDTSevere Thunderstorm WarningOAX26 min
Jul 19, 1:09 PM CDTMesoscale DiscussionSPC2 hr
Jul 19, 2:28 PM CDTTornado WatchSPC8 hr
Jul 20, 7:58 PM CDTMesoscale DiscussionSPC92 min
Jul 20, 8:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 20, 10:50 PM CDTSevere Thunderstorm WarningOAX55 min
Jul 20, 11:48 PM CDTSevere Thunderstorm WarningOAX42 min
Jul 21, 12:11 AM CDTSevere Thunderstorm WarningOAX34 min
Jul 21, 12:43 AM CDTSevere Thunderstorm WarningOAX17 min
Jul 23, 10:45 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 1:46 AM CDTMesoscale DiscussionSPC89 min
Jul 24, 9:08 PM CDTMesoscale DiscussionSPC67 min
Aug 2, 10:13 PM CDTMesoscale DiscussionSPC62 min
Aug 2, 11:13 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 13, 4:37 PM CDTMesoscale DiscussionSPC53 min
Aug 27, 4:48 PM CDTMesoscale DiscussionSPC117 min
Sep 24, 11:04 PM CDTMesoscale DiscussionSPC86 min
Sep 28, 4:59 PM CDTSevere Thunderstorm WatchSPC5 hr
Sep 28, 7:04 PM CDTMesoscale DiscussionSPC116 min
Sep 28, 7:58 PM CDTSevere Thunderstorm WarningOAX47 min
Sep 28, 8:20 PM CDTSevere Thunderstorm WarningOAX40 min
Sep 28, 8:45 PM CDTSevere Thunderstorm WarningOAX24 min
Sep 28, 9:57 PM CDTSevere Thunderstorm WarningOAX48 min
Oct 1, 3:31 PM CDTFrost AdvisoryOAX16 hr
Oct 12, 3:43 AM CDTWind AdvisoryOAX12 hr
Oct 13, 3:34 PM CDTFreeze WarningOAX17 hr
Oct 15, 3:28 PM CDTFreeze WarningOAX18 hr
Oct 26, 3:33 AM CDTWind AdvisoryOAX15 hr
Oct 26, 2:16 PM CDTHigh Wind WarningOAX5 hr
Oct 26, 3:17 PM CDTFreeze WarningOAX18 hr
Nov 6, 4:05 AM CSTWind AdvisoryOAX36 hr
Nov 10, 3:55 PM CSTWinter Weather AdvisoryOAX18 hr
Nov 10, 7:19 PM CSTMesoscale DiscussionSPC4 hr
Dec 8, 12:40 PM CSTWinter Weather AdvisoryOAX21 hr
Dec 13, 4:11 PM CSTWinter Weather AdvisoryOAX30 hr
Dec 14, 3:35 AM CSTWind Chill AdvisoryOAX32 hr
Dec 14, 9:49 PM CSTWind Chill WarningOAX14 hr
Dec 15, 11:57 AM CSTWind Chill AdvisoryOAX4 hr
Dec 18, 6:37 PM CSTMesoscale DiscussionSPC5 hr
Dec 18, 8:34 PM CSTWinter Weather AdvisoryOAX7 hr
Dec 19, 3:34 PM CSTWind Chill WatchOAX24 hr
Dec 19, 3:34 PM CSTWinter Weather AdvisoryOAX28 hr
Dec 20, 3:35 PM CSTWind Chill WarningOAX31 hr
Dec 30, 3:27 AM CSTWind AdvisoryOAX15 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 archive20072009

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.