Alert archive / Minnesota / Grant County

Weather alerts in Grant County, Minnesota, 2010

129 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Grant County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts
129
Warnings
34
Watches
30
Advisories
40
Busiest month
July24 alerts
Busiest day
July 10, 20106 alerts

Over time

By month

Warning verification

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

3 of 8 tornado warnings covering Grant County in 2010 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 39 minutes after it went out.

Grant County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings8363%2100%39 min
Severe thunderstorm warnings8450%520%23 min
Flash flood warnings00

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Forks, ND: tornado warnings1164462%11289%25 min
NWS Grand Forks, ND: severe thunderstorm warnings16810140%21262%22 min
NWS Grand Forks, ND: flash flood warnings292321%3987%113 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 5, 4:07 AM CSTWinter Weather AdvisoryFGF56 hr
Jan 6, 3:39 PM CSTWind Chill AdvisoryFGF44 hr
Jan 7, 4:35 AM CSTWind Chill WarningFGF31 hr
Jan 8, 3:22 PM CSTWind Chill AdvisoryFGF23 hr
Jan 18, 7:19 AM CSTDense Fog AdvisoryFGF5 hr
Jan 18, 12:26 PM CSTDense Fog AdvisoryFGF3 hr
Jan 18, 3:07 PM CSTDense Fog AdvisoryFGF19 hr
Jan 20, 2:41 PM CSTWinter Storm WatchFGF45 hr
Jan 22, 4:43 AM CSTWinter Storm WarningFGF3 days
Jan 23, 9:49 AM CSTWinter Weather AdvisoryFGF66 hr
Jan 25, 4:19 AM CSTBlizzard WarningFGF17 hr
Jan 27, 3:06 PM CSTWind Chill AdvisoryFGF21 hr
Jan 30, 3:24 PM CSTWind Chill AdvisoryFGF6 hr
Feb 4, 3:38 AM CSTWinter Weather AdvisoryFGF50 hr
Feb 5, 3:21 PM CSTWinter Storm WatchFGF25 hr
Feb 6, 3:52 PM CSTWinter Storm WarningFGF47 hr
Feb 6, 3:52 PM CSTWinter Weather AdvisoryFGF50 hr
Feb 12, 3:22 PM CSTWinter Weather AdvisoryFGF48 hr
Mar 11, 3:25 AM CSTDense Fog AdvisoryFGF8 hr
Mar 13, 3:53 AM CSTDense Fog AdvisoryFGF6 hr
Mar 13, 7:14 PM CSTDense Fog AdvisoryFGF14 hr
Apr 10, 4:25 AM CDTRed Flag WarningFGF17 hr
Apr 12, 10:29 PM CDTMesoscale DiscussionSPC2 hr
Apr 13, 1:50 AM CDTWind AdvisoryFGF20 hr
Apr 16, 4:30 AM CDTRed Flag WarningFGF16 hr
Apr 27, 3:18 PM CDTWind AdvisoryFGF30 hr
Apr 27, 3:47 PM CDTRed Flag WarningFGF28 hr
Apr 29, 11:25 PM CDTDense Fog AdvisoryFGF10 hr
May 5, 4:31 AM CDTWind AdvisoryFGF8 hr
May 8, 3:56 AM CDTFreeze WarningFGF28 hr
May 22, 9:01 PM CDTSevere Thunderstorm WatchSPC7 hr
May 23, 12:16 AM CDTSevere Thunderstorm WarningFGF59 min
May 23, 1:13 AM CDTSevere Thunderstorm WarningFGF62 min
May 23, 1:36 AM CDTMesoscale DiscussionSPC84 min
May 24, 1:37 AM CDTMesoscale DiscussionSPC83 min
May 24, 2:00 AM CDTSevere Thunderstorm WatchSPC7 hr
May 24, 4:21 AM CDTMesoscale DiscussionSPC54 min
May 24, 6:12 PM CDTWind AdvisoryFGF4 hr
May 24, 9:32 PM CDTSevere Thunderstorm WatchSPC4 hr
Jun 16, 6:55 PM CDTHigh Wind WatchFGF16 hr
Jun 17, 7:53 AM CDTMesoscale DiscussionSPC97 min
Jun 17, 12:21 PM CDTTornado WatchSPC9 hr
Jun 17, 11:06 PM CDTWind AdvisoryFGF20 hr
Jun 21, 4:31 AM CDTFlash Flood WatchFGF26 hr
Jun 25, 6:27 AM CDTSevere Thunderstorm WarningFGF63 min
Jul 3, 5:20 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 8:18 PM CDTMesoscale DiscussionSPC87 min
Jul 3, 11:48 PM CDTMesoscale DiscussionSPC57 min
Jul 10, 4:03 PM CDTMesoscale DiscussionSPC87 min
Jul 10, 4:47 PM CDTTornado WarningFGF58 min
Jul 10, 4:48 PM CDTTornado WatchSPC3 hr
Jul 10, 4:56 PM CDTTornado WarningFGF64 min
Jul 10, 5:46 PM CDTTornado WarningFGF59 min
Jul 10, 6:37 PM CDTMesoscale DiscussionSPC53 min
Jul 13, 1:50 PM CDTTornado WatchSPC9 hr
Jul 14, 3:00 AM CDTMesoscale DiscussionSPC90 min
Jul 14, 3:50 AM CDTTornado WatchSPC5 hr
Jul 14, 6:12 AM CDTSevere Thunderstorm WarningFGF63 min
Jul 17, 11:58 AM CDTMesoscale DiscussionSPC92 min
Jul 17, 12:28 PM CDTTornado WatchSPC11 hr
Jul 17, 5:28 PM CDTSevere Thunderstorm WarningFGF62 min
Jul 17, 5:56 PM CDTMesoscale DiscussionSPC94 min
Jul 22, 6:14 PM CDTMesoscale DiscussionSPC91 min
Jul 22, 6:40 PM CDTTornado WarningFGF50 min
Jul 27, 1:24 AM CDTSevere Thunderstorm WatchSPC8 hr
Jul 27, 6:29 AM CDTSevere Thunderstorm WarningFGF61 min
Jul 27, 1:43 PM CDTMesoscale DiscussionSPC32 min
Jul 27, 3:29 PM CDTTornado WatchSPC7 hr
Jul 27, 4:02 PM CDTTornado WarningFGF48 min
Aug 1, 1:27 PM CDTMesoscale DiscussionSPC2 hr
Aug 1, 2:57 PM CDTTornado WatchSPC7 hr
Aug 1, 6:56 PM CDTMesoscale DiscussionSPC2 hr
Aug 3, 3:19 AM CDTDense Fog AdvisoryFGF4 hr
Aug 7, 4:13 AM CDTFlash Flood WatchFGF20 hr
Aug 7, 3:10 PM CDTMesoscale DiscussionSPC2 hr
Aug 7, 5:27 PM CDTTornado WatchSPC8 hr
Aug 7, 6:03 PM CDTTornado WarningFGF57 min
Aug 7, 6:58 PM CDTTornado WarningFGF62 min
Aug 7, 7:57 PM CDTTornado WarningFGF23 min
Aug 7, 8:57 PM CDTMesoscale DiscussionSPC93 min
Aug 12, 2:05 PM CDTMesoscale DiscussionSPC115 min
Aug 12, 3:22 PM CDTTornado WatchSPC7 hr
Aug 12, 5:57 PM CDTMesoscale DiscussionSPC63 min
Aug 12, 10:53 PM CDTMesoscale DiscussionSPC67 min
Aug 18, 9:37 AM CDTSevere Thunderstorm WarningFGF38 min
Aug 18, 10:01 AM CDTMesoscale DiscussionSPC119 min
Aug 18, 11:09 AM CDTSevere Thunderstorm WarningFGF36 min
Aug 19, 10:03 PM CDTMesoscale DiscussionSPC57 min
Aug 21, 3:31 AM CDTDense Fog AdvisoryFGF4 hr
Aug 21, 8:39 AM CDTDense Fog AdvisoryFGF2 hr
Aug 21, 9:14 PM CDTWind AdvisoryFGF24 hr
Aug 30, 3:53 PM CDTTornado WatchSPC6 hr
Sep 6, 2:34 PM CDTWind AdvisoryFGF13 hr
Sep 22, 3:15 PM CDTFlood WatchFGF5 hr
Sep 22, 8:28 PM CDTFlood WatchFGF17 hr
Oct 1, 2:43 PM CDTFrost AdvisoryFGF18 hr
Oct 2, 3:02 PM CDTFrost AdvisoryFGF18 hr
Oct 20, 4:22 AM CDTWind AdvisoryFGF14 hr
Oct 25, 10:18 AM CDTHigh Wind WatchFGF18 hr
Oct 25, 2:58 PM CDTHigh Wind WarningFGF43 hr
Oct 25, 3:10 PM CDTWinter Storm WatchFGF23 hr
Oct 26, 2:35 PM CDTWinter Storm WarningFGF24 hr
Oct 27, 2:31 PM CDTWind AdvisoryFGF10 hr
Nov 20, 4:15 AM CSTWinter Weather AdvisoryFGF35 hr
Nov 21, 3:19 PM CSTWinter Weather AdvisoryFGF32 hr
Nov 22, 4:17 AM CSTWinter Storm WatchFGF35 hr
Nov 23, 3:15 PM CSTWinter Weather AdvisoryFGF44 hr
Nov 28, 3:08 PM CSTWinter Storm WatchFGF14 hr
Nov 29, 4:39 AM CSTWinter Storm WarningFGF31 hr
Nov 29, 4:39 AM CSTWinter Weather AdvisoryFGF40 hr
Dec 2, 4:20 AM CSTWinter Storm WatchFGF11 hr
Dec 2, 3:24 PM CSTWinter Weather AdvisoryFGF37 hr
Dec 3, 11:28 AM CSTWinter Storm WarningFGF12 hr
Dec 10, 4:17 AM CSTWinter Weather AdvisoryFGF29 hr
Dec 10, 4:09 PM CSTWinter Storm WarningFGF12 hr
Dec 11, 3:18 PM CSTWind Chill AdvisoryFGF13 hr
Dec 14, 3:13 PM CSTWinter Weather AdvisoryFGF42 hr
Dec 19, 4:13 AM CSTWinter Storm WatchFGF24 hr
Dec 19, 2:46 PM CSTWinter Storm WarningFGF39 hr
Dec 23, 4:32 AM CSTWinter Weather AdvisoryFGF23 hr
Dec 28, 5:19 AM CSTWinter Storm WatchFGF35 hr
Dec 29, 3:50 PM CSTWinter Storm WatchFGF37 hr
Dec 29, 3:50 PM CSTWinter Storm WarningFGF36 hr
Dec 29, 3:50 PM CSTWinter Weather AdvisoryFGF50 hr
Dec 30, 11:35 AM CSTMesoscale DiscussionSPC5 hr
Dec 30, 12:16 PM CSTBlizzard WarningFGF16 hr
Dec 30, 5:43 PM CSTMesoscale DiscussionSPC4 hr
Dec 31, 4:20 AM CSTBlizzard WarningFGF32 hr
Dec 31, 4:20 AM CSTWinter Storm WarningFGF32 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 archive20092011

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.