Alert archive / Minnesota / Morrison County

Weather alerts in Morrison County, Minnesota, 2012

117 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Morrison County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts
117
Warnings
32
Watches
19
Advisories
24
Busiest month
May29 alerts
Busiest day
May 27, 20129 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 1 tornado warnings covering Morrison County in 2012 had a tornado report inside them.

Morrison County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings15660%520%12 min
Flash flood warnings10100%0

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Twin Cities, MN: tornado warnings39685%2133%10 min
NWS Twin Cities, MN: severe thunderstorm warnings28214549%47070%22 min
NWS Twin Cities, MN: flash flood warnings14657%2642%153 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 18, 3:32 AM CSTExtreme Cold WarningMPX32 hr
Jan 22, 3:41 PM CSTWinter Weather AdvisoryMPX24 hr
Feb 1, 7:48 PM CSTDense Fog AdvisoryMPX14 hr
Feb 2, 2:46 PM CSTDense Fog AdvisoryMPX19 hr
Feb 4, 1:46 AM CSTDense Fog AdvisoryMPX8 hr
Feb 10, 3:15 PM CSTExtreme Cold WarningMPX12 hr
Feb 20, 4:58 AM CSTWinter Weather AdvisoryMPX25 hr
Feb 25, 3:26 PM CSTWinter Weather AdvisoryMPX19 hr
Feb 26, 3:38 AM CSTWinter Storm WatchMPX37 hr
Feb 27, 4:26 PM CSTWinter Storm WarningMPX46 hr
Feb 28, 2:43 PM CSTMesoscale DiscussionSPC5 hr
Feb 28, 8:41 PM CSTMesoscale DiscussionSPC6 hr
Mar 8, 4:18 AM CSTWind AdvisoryMPX16 hr
Mar 19, 3:29 PM CDTMesoscale DiscussionSPC2 hr
Mar 23, 3:21 PM CDTDense Fog AdvisoryMPX20 hr
Mar 26, 2:19 PM CDTWind AdvisoryMPX29 hr
Apr 7, 3:14 PM CDTFire Weather WatchMPX13 hr
Apr 8, 4:23 AM CDTRed Flag WarningMPX16 hr
Apr 8, 3:21 PM CDTFreeze WatchMPX11 hr
Apr 9, 2:37 AM CDTFreeze WarningMPX31 hr
Apr 9, 8:48 PM CDTFreeze WarningMPX37 hr
Apr 11, 2:28 PM CDTFreeze WarningMPX19 hr
Apr 15, 12:05 PM CDTSpecial Weather StatementMPX55 min
Apr 26, 2:24 PM CDTFreeze WarningMPX18 hr
May 1, 4:41 AM CDTSpecial Weather StatementMPX79 min
May 1, 2:59 PM CDTTornado WatchSPC6 hr
May 1, 5:23 PM CDTSevere Thunderstorm WarningMPX37 min
May 3, 6:49 AM CDTSevere Thunderstorm WarningMPX41 min
May 3, 7:34 AM CDTSevere Thunderstorm WarningMPX41 min
May 18, 4:54 PM CDTMesoscale DiscussionSPC66 min
May 18, 5:57 PM CDTSpecial Weather StatementMPX48 min
May 19, 1:49 PM CDTMesoscale DiscussionSPC86 min
May 23, 3:23 AM CDTFlash Flood WatchMPX34 hr
May 23, 2:04 PM CDTMesoscale DiscussionSPC86 min
May 23, 2:06 PM CDTSpecial Weather StatementMPX84 min
May 23, 10:40 PM CDTRiver Flood AdvisoryDLH12 hr
May 26, 9:22 PM CDTRiver Flood AdvisoryDLH36 hr
May 26, 11:51 PM CDTSevere Thunderstorm WarningMPX54 min
May 26, 11:57 PM CDTMesoscale DiscussionSPC93 min
May 27, 12:52 AM CDTSpecial Weather StatementMPX53 min
May 27, 2:03 AM CDTFlash Flood WarningMPX3 hr
May 27, 3:32 AM CDTFlash Flood WatchMPX26 hr
May 27, 1:49 PM CDTRiver Flood WarningDLH11 days
May 27, 3:49 PM CDTMesoscale DiscussionSPC56 min
May 27, 6:08 PM CDTSevere Thunderstorm WatchSPC7 hr
May 27, 7:47 PM CDTMesoscale DiscussionSPC88 min
May 27, 9:28 PM CDTSevere Thunderstorm WarningMPX62 min
May 27, 10:09 PM CDTSpecial Weather StatementMPX51 min
May 27, 10:11 PM CDTMesoscale DiscussionSPC94 min
May 27, 10:19 PM CDTAreal Flood AdvisoryMPX4 hr
May 28, 1:48 PM CDTMesoscale DiscussionSPC57 min
May 28, 2:44 PM CDTSevere Thunderstorm WarningMPX61 min
May 28, 2:48 PM CDTSpecial Weather StatementMPX42 min
Jun 10, 1:34 PM CDTMesoscale DiscussionSPC56 min
Jun 10, 2:31 PM CDTSpecial Weather StatementMPX29 min
Jun 10, 3:03 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 10, 3:55 PM CDTSevere Thunderstorm WarningMPX31 min
Jun 10, 4:39 PM CDTSevere Thunderstorm WarningMPX66 min
Jun 10, 5:01 PM CDTSevere Thunderstorm WarningMPX44 min
Jun 10, 5:28 PM CDTSevere Thunderstorm WarningMPX62 min
Jun 10, 5:38 PM CDTMesoscale DiscussionSPC67 min
Jun 10, 6:33 PM CDTSevere Thunderstorm WarningMPX57 min
Jun 17, 7:27 PM CDTMesoscale DiscussionSPC93 min
Jun 17, 7:57 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 18, 4:31 PM CDTFlash Flood WatchMPX56 hr
Jun 19, 2:39 AM CDTMesoscale DiscussionSPC66 min
Jun 19, 12:14 PM CDTRiver Flood WarningDLH25 days
Jun 19, 4:56 PM CDTMesoscale DiscussionSPC94 min
Jun 19, 6:08 PM CDTTornado WatchSPC7 hr
Jun 19, 9:12 PM CDTMesoscale DiscussionSPC93 min
Jun 19, 11:37 PM CDTMesoscale DiscussionSPC83 min
Jun 20, 5:27 AM CDTMesoscale DiscussionSPC2 hr
Jul 1, 4:14 PM CDTHeat AdvisoryMPX37 hr
Jul 2, 3:06 PM CDTExcessive Heat WarningMPX4 days
Jul 2, 6:40 PM CDTMesoscale DiscussionSPC65 min
Jul 2, 6:54 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 2, 9:17 PM CDTMesoscale DiscussionSPC118 min
Jul 3, 12:55 AM CDTSevere Thunderstorm WarningMPX65 min
Jul 3, 2:02 AM CDTSevere Thunderstorm WarningMPX28 min
Jul 4, 8:59 PM CDTTornado WatchSPC5 hr
Jul 4, 9:44 PM CDTTornado WarningMPX31 min
Jul 4, 10:15 PM CDTSevere Thunderstorm WarningMPX15 min
Jul 4, 10:17 PM CDTSpecial Weather StatementMPX28 min
Jul 6, 6:02 PM CDTMesoscale DiscussionSPC28 min
Jul 13, 1:04 PM CDTSpecial Weather StatementMPX41 min
Jul 13, 1:35 PM CDTMesoscale DiscussionSPC55 min
Jul 13, 2:22 PM CDTSpecial Weather StatementMPX38 min
Jul 15, 3:41 AM CDTHeat AdvisoryMPX41 hr
Jul 18, 7:58 AM CDTSpecial Weather StatementMPX62 min
Jul 21, 5:21 AM CDTAreal Flood AdvisoryMPX3 hr
Jul 24, 9:08 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 11:24 PM CDTMesoscale DiscussionSPC96 min
Jul 25, 2:00 AM CDTSevere Thunderstorm WarningMPX45 min
Jul 25, 2:24 AM CDTSevere Thunderstorm WatchSPC5 hr
Jul 25, 5:24 AM CDTMesoscale DiscussionSPC66 min
Aug 3, 7:33 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 15, 2:56 PM CDTMesoscale DiscussionSPC64 min
Aug 15, 3:25 PM CDTSevere Thunderstorm WatchSPC8 hr
Aug 15, 5:49 PM CDTMesoscale DiscussionSPC86 min
Aug 15, 8:20 PM CDTMesoscale DiscussionSPC85 min
Aug 22, 3:07 PM CDTSpecial Weather StatementMPX38 min
Aug 26, 5:50 AM CDTDense Fog AdvisoryMPX3 hr
Sep 2, 7:24 PM CDTMesoscale DiscussionSPC96 min
Sep 9, 12:05 PM CDTRed Flag WarningMPX57 hr
Sep 17, 2:16 PM CDTFrost AdvisoryMPX17 hr
Sep 21, 3:03 PM CDTFreeze WatchMPX12 hr
Sep 22, 3:14 AM CDTFreeze WarningMPX29 hr
Oct 1, 6:58 PM CDTRed Flag WarningMPX24 hr
Oct 3, 2:31 PM CDTWind AdvisoryMPX28 hr
Oct 23, 3:24 PM CDTDense Fog AdvisoryMPX15 hr
Nov 22, 7:07 PM CSTWinter Weather AdvisoryMPX11 hr
Dec 1, 3:03 PM CSTFreezing Fog AdvisoryMPX21 hr
Dec 7, 4:18 AM CSTWinter Storm WatchMPX23 hr
Dec 7, 3:49 PM CSTWinter Storm WarningMPX56 hr
Dec 13, 9:37 PM CSTDense Fog AdvisoryMPX10 hr
Dec 14, 4:37 AM CSTWinter Weather AdvisoryMPX43 hr
Dec 24, 4:00 AM CSTWind Chill AdvisoryMPX30 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 archive20112013

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.