Alert archive / Wisconsin / Polk County

Weather alerts in Polk County, Wisconsin, 2012

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

Polk County and its neighbors

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

Alerts
107
Warnings
25
Watches
21
Advisories
19
Busiest month
May28 alerts
Busiest day
May 28, 201211 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 Polk County in 2012 had a tornado report inside them.

Polk County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings12558%6100%24 min
Flash flood warnings110%3100%185 min

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
Dec 31, 8:54 PM CSTWinter Weather AdvisoryMPX7 hr
Jan 22, 4:48 AM CSTFreezing Rain AdvisoryMPX11 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 20, 4:58 AM CSTWinter Weather AdvisoryMPX25 hr
Feb 26, 3:38 AM CSTWinter Storm WatchMPX37 hr
Feb 27, 4:26 PM CSTWinter Storm WarningMPX46 hr
Feb 28, 2:40 PM CSTMesoscale DiscussionSPC4 hr
Feb 28, 8:41 PM CSTMesoscale DiscussionSPC6 hr
Mar 19, 9:14 PM CDTSpecial Weather StatementMPX46 min
Mar 26, 2:19 PM CDTWind AdvisoryMPX29 hr
Mar 28, 3:22 PM CDTFreeze WarningMPX18 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 15, 3:37 PM CDTTornado WatchSPC7 hr
Apr 15, 5:54 PM CDTMesoscale DiscussionSPC96 min
Apr 15, 7:51 PM CDTSpecial Weather StatementMPX39 min
Apr 26, 2:24 PM CDTFreeze WarningMPX18 hr
May 1, 6:10 PM CDTTornado WatchSPC6 hr
May 1, 6:11 PM CDTMesoscale DiscussionSPC94 min
May 1, 8:08 PM CDTSevere Thunderstorm WarningMPX37 min
May 3, 3:37 AM CDTSpecial Weather StatementMPX38 min
May 3, 3:51 AM CDTSpecial Weather StatementMPX39 min
May 3, 9:37 AM CDTSpecial Weather StatementMPX38 min
May 3, 10:45 AM CDTSpecial Weather StatementMPX45 min
May 19, 7:05 PM CDTSevere Thunderstorm WarningMPX55 min
May 19, 7:31 PM CDTSevere Thunderstorm WarningMPX59 min
May 19, 7:42 PM CDTSevere Thunderstorm WarningMPX63 min
May 23, 5:27 PM CDTMesoscale DiscussionSPC93 min
May 24, 12:58 PM CDTSpecial Weather StatementMPX32 min
May 26, 10:30 PM CDTSpecial Weather StatementMPX60 min
May 27, 3:32 AM CDTFlash Flood WatchMPX26 hr
May 27, 3:49 PM CDTMesoscale DiscussionSPC56 min
May 27, 6:08 PM CDTSevere Thunderstorm WatchSPC7 hr
May 27, 6:11 PM CDTSevere Thunderstorm WarningMPX49 min
May 27, 7:09 PM CDTAreal Flood AdvisoryMPX3 hr
May 27, 7:18 PM CDTTornado WarningMPX27 min
May 27, 7:47 PM CDTMesoscale DiscussionSPC88 min
May 27, 7:55 PM CDTFlash Flood WarningMPX5 hr
May 27, 10:11 PM CDTMesoscale DiscussionSPC94 min
May 28, 12:58 AM CDTAreal Flood WarningMPX6 hr
May 28, 1:48 PM CDTMesoscale DiscussionSPC57 min
May 28, 2:07 PM CDTSevere Thunderstorm WatchSPC6 hr
May 28, 3:58 PM CDTMesoscale DiscussionSPC92 min
May 28, 5:49 PM CDTSpecial Weather StatementMPX56 min
May 28, 6:12 PM CDTSpecial Weather StatementMPX33 min
Jun 10, 3:03 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 10, 8:32 PM CDTSevere Thunderstorm WarningMPX58 min
Jun 10, 9:29 PM CDTSevere Thunderstorm WarningMPX61 min
Jun 14, 7:37 AM CDTMesoscale DiscussionSPC113 min
Jun 14, 9:11 AM CDTSpecial Weather StatementMPX49 min
Jun 14, 1:22 PM CDTAreal Flood AdvisoryMPX3 hr
Jun 14, 2:09 PM CDTSevere Thunderstorm WarningMPX36 min
Jun 14, 2:58 PM CDTSevere Thunderstorm WarningMPX47 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, 3:25 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 19, 4:16 AM CDTMesoscale DiscussionSPC89 min
Jun 19, 6:08 PM CDTTornado WatchSPC7 hr
Jun 20, 9:40 AM CDTMesoscale DiscussionSPC95 min
Jun 20, 2:10 PM CDTMesoscale DiscussionSPC95 min
Jun 20, 3:55 PM CDTAreal Flood AdvisoryMPX4 hr
Jul 1, 4:14 PM CDTHeat AdvisoryMPX37 hr
Jul 2, 3:06 PM CDTExcessive Heat WarningMPX4 days
Jul 3, 2:00 AM CDTMesoscale DiscussionSPC90 min
Jul 3, 2:42 AM CDTSpecial Weather StatementMPX48 min
Jul 4, 8:59 PM CDTTornado WatchSPC5 hr
Jul 5, 1:11 AM CDTSevere Thunderstorm WarningMPX16 min
Jul 6, 6:02 PM CDTMesoscale DiscussionSPC28 min
Jul 6, 6:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 6, 9:33 PM CDTMesoscale DiscussionSPC57 min
Jul 13, 5:38 PM CDTSpecial Weather StatementMPX67 min
Jul 13, 6:02 PM CDTMesoscale DiscussionSPC88 min
Jul 15, 3:41 AM CDTHeat AdvisoryMPX41 hr
Jul 25, 2:24 AM CDTSevere Thunderstorm WatchSPC5 hr
Jul 25, 5:24 AM CDTMesoscale DiscussionSPC66 min
Aug 1, 1:07 PM CDTMesoscale DiscussionSPC23 min
Aug 1, 4:14 PM CDTMesoscale DiscussionSPC91 min
Aug 3, 10:33 PM CDTMesoscale DiscussionSPC87 min
Aug 3, 10:57 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 3, 11:12 PM CDTSevere Thunderstorm WarningMPX33 min
Aug 3, 11:38 PM CDTSevere Thunderstorm WarningMPX67 min
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
Sep 4, 1:33 PM CDTMesoscale DiscussionSPC117 min
Sep 4, 3:27 PM CDTSevere Thunderstorm WatchSPC8 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 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

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.