Alert archive / Nebraska / Dakota County

Weather alerts in Dakota County, Nebraska, 2008

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

Dakota County and its neighbors

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

Alerts
138
Warnings
23
Watches
26
Advisories
37
Busiest month
June37 alerts
Busiest day
June 5, 20088 alerts

Over time

By month

Warning verification

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

1 of 1 tornado warnings covering Dakota County in 2008 had a tornado report inside them.

Dakota County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings110%0
Severe thunderstorm warnings12925%4100%38 min
Flash flood warnings2150%0

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Sioux Falls, SD: tornado warnings551965%4990%14 min
NWS Sioux Falls, SD: severe thunderstorm warnings29613056%25382%19 min
NWS Sioux Falls, SD: flash flood warnings282029%4489%88 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 11, 5:17 AM CSTDense Fog AdvisoryFSD6 hr
Jan 17, 10:39 AM CSTWind Chill AdvisoryFSD52 hr
Jan 19, 3:16 PM CSTSnow AdvisoryFSD51 hr
Jan 28, 3:16 PM CSTWinter Weather AdvisoryFSD21 hr
Jan 28, 7:22 PM CSTWind AdvisoryFSD11 hr
Jan 29, 4:19 AM CSTWind Chill AdvisoryFSD29 hr
Jan 29, 7:39 AM CSTMesoscale DiscussionSPC5 hr
Feb 3, 3:51 PM CSTSnow AdvisoryFSD20 hr
Feb 3, 9:38 PM CSTWinter Weather AdvisoryFSD17 hr
Feb 8, 3:09 PM CSTWind Chill AdvisoryFSD49 hr
Feb 8, 3:09 PM CSTWinter Weather AdvisoryFSD24 hr
Feb 10, 9:43 PM CSTSnow AdvisoryFSD29 hr
Feb 11, 12:32 PM CSTMesoscale DiscussionSPC5 hr
Feb 17, 12:25 PM CSTWind AdvisoryFSD7 hr
Feb 19, 4:00 AM CSTWind Chill AdvisoryFSD31 hr
Feb 19, 3:34 PM CSTWind Chill WarningFSD20 hr
Feb 24, 3:58 PM CSTWinter Weather AdvisoryFSD26 hr
Feb 25, 9:30 AM CSTMesoscale DiscussionSPC6 hr
Mar 2, 3:34 AM CSTWind AdvisoryFSD14 hr
Mar 17, 7:25 PM CDTDense Fog AdvisoryFSD15 hr
Apr 14, 3:53 PM CDTWind AdvisoryFSD29 hr
Apr 21, 11:54 AM CDTMesoscale DiscussionSPC2 hr
May 1, 3:28 PM CDTMesoscale DiscussionSPC92 min
May 2, 3:49 PM CDTWind AdvisoryFSD12 hr
May 6, 10:56 AM CDTMesoscale DiscussionSPC94 min
May 6, 12:03 PM CDTSevere Thunderstorm WatchSPC7 hr
May 6, 2:22 PM CDTMesoscale DiscussionSPC113 min
May 6, 4:21 PM CDTSevere Thunderstorm WarningFSD39 min
May 10, 3:22 AM CDTWind AdvisoryFSD25 hr
May 17, 12:16 PM CDTWind AdvisoryFSD8 hr
May 24, 3:08 PM CDTTornado WatchSPC6 hr
May 24, 6:33 PM CDTMesoscale DiscussionSPC117 min
May 24, 9:01 PM CDTMesoscale DiscussionSPC59 min
May 29, 3:28 AM CDTFlash Flood WatchFSD24 hr
May 29, 5:32 AM CDTMesoscale DiscussionSPC118 min
May 29, 5:07 PM CDTMesoscale DiscussionSPC23 min
May 29, 5:26 PM CDTTornado WatchSPC6 hr
May 29, 10:21 PM CDTMesoscale DiscussionSPC24 min
Jun 3, 1:57 AM CDTSevere Thunderstorm WatchSPC3 hr
Jun 3, 2:12 AM CDTSevere Thunderstorm WarningFSD29 min
Jun 3, 4:12 AM CDTMesoscale DiscussionSPC2 hr
Jun 4, 3:00 PM CDTFlash Flood WatchFSD12 hr
Jun 4, 11:02 PM CDTHigh Wind WarningFSD96 min
Jun 4, 11:56 PM CDTTornado WatchSPC5 hr
Jun 5, 10:11 AM CDTMesoscale DiscussionSPC94 min
Jun 5, 10:35 AM CDTFlash Flood WatchFSD11 hr
Jun 5, 10:55 AM CDTTornado Watch PDSSPC8 hr
Jun 5, 12:09 PM CDTSevere Thunderstorm WarningFSD36 min
Jun 5, 5:10 PM CDTMesoscale DiscussionSPC95 min
Jun 5, 5:50 PM CDTTornado Watch PDSSPC7 hr
Jun 7, 3:14 AM CDTFlash Flood WatchFSD27 hr
Jun 7, 10:15 PM CDTMesoscale DiscussionSPC90 min
Jun 7, 11:01 PM CDTMesoscale DiscussionSPC59 min
Jun 7, 11:11 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 8, 2:29 AM CDTMesoscale DiscussionSPC31 min
Jun 11, 10:22 AM CDTWind AdvisoryFSD5 hr
Jun 11, 2:03 PM CDTMesoscale DiscussionSPC117 min
Jun 11, 2:52 PM CDTTornado WatchSPC7 hr
Jun 11, 5:59 PM CDTMesoscale DiscussionSPC91 min
Jun 11, 8:57 PM CDTMesoscale DiscussionSPC93 min
Jun 19, 1:14 PM CDTMesoscale DiscussionSPC61 min
Jun 19, 1:32 PM CDTSevere Thunderstorm WarningFSD28 min
Jun 19, 6:11 PM CDTMesoscale DiscussionSPC64 min
Jun 21, 3:05 PM CDTMesoscale DiscussionSPC85 min
Jun 21, 7:41 PM CDTMesoscale DiscussionSPC64 min
Jun 26, 3:48 AM CDTMesoscale DiscussionSPC87 min
Jun 26, 6:38 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 6:50 AM CDTFlash Flood WarningFSD2 hr
Jun 26, 6:56 AM CDTSevere Thunderstorm WarningFSD49 min
Jun 26, 7:51 AM CDTMesoscale DiscussionSPC84 min
Jun 26, 9:53 AM CDTMesoscale DiscussionSPC97 min
Jun 26, 12:05 PM CDTMesoscale DiscussionSPC55 min
Jun 26, 3:06 PM CDTFlash Flood WatchFSD12 hr
Jun 26, 9:46 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 28, 3:06 AM CDTWind AdvisoryFSD18 hr
Jul 6, 2:36 PM CDTMesoscale DiscussionSPC114 min
Jul 6, 3:05 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 6, 4:41 PM CDTTornado WarningFSD34 min
Jul 6, 11:13 PM CDTMesoscale DiscussionSPC2 hr
Jul 9, 1:33 PM CDTMesoscale DiscussionSPC57 min
Jul 11, 3:13 PM CDTMesoscale DiscussionSPC92 min
Jul 11, 5:08 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 11, 8:29 PM CDTMesoscale DiscussionSPC91 min
Jul 12, 3:26 AM CDTMesoscale DiscussionSPC64 min
Jul 17, 12:04 PM CDTMesoscale DiscussionSPC116 min
Jul 17, 5:50 PM CDTMesoscale DiscussionSPC85 min
Jul 19, 1:09 PM CDTMesoscale DiscussionSPC2 hr
Jul 19, 2:28 PM CDTTornado WatchSPC8 hr
Jul 19, 7:00 PM CDTSevere Thunderstorm WarningFSD45 min
Jul 20, 10:04 AM CDTMesoscale DiscussionSPC86 min
Jul 20, 7:58 PM CDTMesoscale DiscussionSPC92 min
Jul 20, 8:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 20, 11:10 PM CDTMesoscale DiscussionSPC95 min
Jul 20, 11:53 PM CDTSevere Thunderstorm WarningFSD52 min
Jul 21, 12:16 AM CDTFlash Flood WarningFSD3 hr
Jul 21, 12:34 AM CDTSevere Thunderstorm WarningFSD41 min
Jul 21, 12:49 AM CDTSevere Thunderstorm WarningFSD26 min
Jul 21, 4:01 AM CDTMesoscale DiscussionSPC89 min
Jul 23, 10:45 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 1:46 AM CDTMesoscale DiscussionSPC89 min
Jul 27, 1:02 PM CDTMesoscale DiscussionSPC118 min
Jul 27, 2:29 PM CDTSevere Thunderstorm WatchSPC8 hr
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, 3:24 AM CDTSevere Thunderstorm WarningFSD22 min
Aug 27, 4:40 AM CDTMesoscale DiscussionSPC95 min
Aug 27, 4:48 PM CDTMesoscale DiscussionSPC117 min
Aug 27, 10:16 PM CDTMesoscale DiscussionSPC119 min
Aug 28, 1:11 AM CDTSevere Thunderstorm WarningFSD34 min
Sep 28, 9:20 PM CDTSevere Thunderstorm WarningFSD40 min
Oct 1, 9:40 AM CDTFrost AdvisoryFSD23 hr
Oct 12, 3:56 AM CDTWind AdvisoryFSD15 hr
Oct 13, 3:33 PM CDTFreeze WarningFSD17 hr
Oct 15, 3:05 PM CDTFreeze WarningFSD18 hr
Oct 25, 1:41 PM CDTHigh Wind WatchFSD14 hr
Oct 26, 3:49 AM CDTHigh Wind WarningFSD16 hr
Nov 5, 2:51 PM CSTMesoscale DiscussionSPC114 min
Nov 6, 3:30 AM CSTWind AdvisoryFSD39 hr
Nov 10, 11:06 AM CSTWinter Weather AdvisoryFSD27 hr
Nov 10, 7:19 PM CSTMesoscale DiscussionSPC4 hr
Nov 11, 9:24 AM CSTWinter Weather AdvisoryFSD3 hr
Nov 12, 2:50 AM CSTDense Fog AdvisoryFSD7 hr
Dec 8, 4:34 AM CSTWinter Weather AdvisoryFSD23 hr
Dec 13, 4:01 PM CSTWinter Weather AdvisoryFSD32 hr
Dec 14, 4:27 AM CSTWind AdvisoryFSD11 hr
Dec 14, 3:50 PM CSTWind Chill AdvisoryFSD24 hr
Dec 15, 3:47 PM CSTWinter Weather AdvisoryFSD24 hr
Dec 17, 3:50 AM CSTWinter Storm WatchFSD17 hr
Dec 17, 8:44 PM CSTWinter Weather AdvisoryFSD33 hr
Dec 18, 11:21 AM CSTWinter Storm WarningFSD19 hr
Dec 18, 3:39 PM CSTBlizzard WatchFSD24 hr
Dec 18, 6:37 PM CSTMesoscale DiscussionSPC5 hr
Dec 19, 4:25 AM CSTWinter Weather AdvisoryFSD32 hr
Dec 19, 4:08 PM CSTBlizzard WarningFSD47 hr
Dec 20, 3:59 PM CSTWind Chill WarningFSD29 hr
Dec 26, 9:06 AM CSTDense Fog AdvisoryFSD4 hr
Dec 29, 3:04 PM CSTWind AdvisoryFSD20 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.