Alert archive / Iowa / Winneshiek County

Weather alerts in Winneshiek County, Iowa, 2021

116 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Winneshiek County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
116
Warnings
16
Watches
19
Advisories
33
Busiest month
August28 alerts
Busiest day
August 27, 20217 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 Winneshiek County in 2021 had a tornado report inside them.

Winneshiek County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings550%2100%30 min
Flash flood warnings2150%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS La Crosse, WI: tornado warnings28775%14100%22 min
NWS La Crosse, WI: severe thunderstorm warnings1175850%26975%30 min
NWS La Crosse, WI: flash flood warnings11918%2584%61 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 2, 1:55 PM CSTDense Fog AdvisoryARX22 hr
Jan 3, 2:58 PM CSTDense Fog AdvisoryARX24 hr
Jan 13, 2:42 PM CSTWinter Weather AdvisoryARX42 hr
Jan 16, 9:25 PM CSTWinter Weather AdvisoryARX15 hr
Jan 22, 2:15 PM CSTWinter Weather AdvisoryARX43 hr
Jan 29, 2:54 PM CSTWinter Weather AdvisoryARX45 hr
Feb 2, 2:29 PM CSTWinter Storm WatchARX23 hr
Feb 3, 1:53 PM CSTWinter Weather AdvisoryARX34 hr
Feb 5, 3:44 AM CSTWind Chill AdvisoryARX3 days
Feb 8, 1:34 PM CSTWind Chill AdvisoryARX20 hr
Feb 10, 2:52 PM CSTWind Chill AdvisoryARX19 hr
Feb 11, 2:20 PM CSTWind Chill AdvisoryARX46 hr
Feb 13, 3:15 AM CSTWind Chill WarningARX57 hr
Feb 15, 11:53 AM CSTWind Chill AdvisoryARX22 hr
Feb 20, 2:09 PM CSTWinter Weather AdvisoryARX32 hr
Feb 25, 10:11 PM CSTDense Fog AdvisoryARX9 hr
Feb 28, 6:49 AM CSTDense Fog AdvisoryARX5 hr
Mar 10, 1:32 PM CSTMesoscale DiscussionSPC118 min
Mar 10, 2:46 PM CSTTornado WatchSPC5 hr
Mar 10, 5:43 PM CSTMesoscale DiscussionSPC2 hr
Mar 10, 7:17 PM CSTSpecial Weather StatementARX58 min
Mar 14, 4:06 AM CDTWinter Storm WarningARX39 hr
Mar 14, 4:06 AM CDTWinter Weather AdvisoryARX42 hr
Mar 28, 1:57 PM CDTWind AdvisoryARX30 hr
Apr 4, 7:38 PM CDTSpecial Weather StatementARX52 min
Apr 27, 8:24 PM CDTMesoscale DiscussionSPC2 hr
May 1, 10:24 AM CDTRed Flag WarningARX10 hr
May 2, 4:20 PM CDTMesoscale DiscussionSPC115 min
May 7, 1:37 PM CDTFrost AdvisoryARX18 hr
May 10, 1:52 PM CDTFrost AdvisoryARX18 hr
May 11, 1:45 PM CDTFrost AdvisoryARX18 hr
May 20, 9:05 PM CDTMesoscale DiscussionSPC115 min
May 25, 8:42 PM CDTSpecial Weather StatementARX33 min
May 28, 10:36 AM CDTFrost AdvisoryARX20 hr
Jun 11, 9:35 AM CDTMesoscale DiscussionSPC115 min
Jun 17, 2:57 PM CDTMesoscale DiscussionSPC63 min
Jun 17, 3:50 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 17, 7:02 PM CDTMesoscale DiscussionSPC88 min
Jun 17, 9:01 PM CDTMesoscale DiscussionSPC89 min
Jun 17, 10:01 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 17, 10:52 PM CDTMesoscale DiscussionSPC83 min
Jun 20, 1:42 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 20, 5:09 PM CDTSpecial Weather StatementARX36 min
Jun 20, 5:22 PM CDTMesoscale DiscussionSPC113 min
Jun 25, 6:52 PM CDTAreal Flood AdvisoryARX2 hr
Jul 6, 2:01 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 6, 5:22 PM CDTMesoscale DiscussionSPC113 min
Jul 6, 8:00 PM CDTMesoscale DiscussionSPC2 hr
Jul 14, 7:02 AM CDTMesoscale DiscussionSPC2 hr
Jul 14, 8:54 AM CDTSevere Thunderstorm WatchSPC5 hr
Jul 14, 6:13 PM CDTTornado WatchSPC6 hr
Jul 27, 3:10 PM CDTHeat AdvisoryARX30 hr
Jul 27, 7:33 PM CDTMesoscale DiscussionSPC87 min
Jul 27, 8:03 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 27, 10:24 PM CDTSpecial Weather StatementARX81 min
Jul 27, 10:35 PM CDTMesoscale DiscussionSPC55 min
Jul 27, 11:06 PM CDTSpecial Weather StatementARX54 min
Jul 28, 7:17 PM CDTSevere Thunderstorm Watch PDSSPC7 hr
Jul 31, 1:27 AM CDTSpecial Weather StatementARX3 hr
Jul 31, 1:06 PM CDTMesoscale DiscussionSPC2 hr
Jul 31, 5:51 PM CDTSpecial Weather StatementARX54 min
Jul 31, 6:15 PM CDTSpecial Weather StatementARX60 min
Jul 31, 6:33 PM CDTSpecial Weather StatementARX57 min
Aug 7, 11:03 AM CDTMesoscale DiscussionSPC2 hr
Aug 7, 3:46 PM CDTMesoscale DiscussionSPC119 min
Aug 7, 6:18 PM CDTFlash Flood WatchARX35 hr
Aug 8, 9:50 PM CDTSpecial Weather StatementARX55 min
Aug 9, 1:55 PM CDTHeat AdvisoryARX28 hr
Aug 10, 2:08 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 10, 2:10 PM CDTSevere Thunderstorm WarningARX50 min
Aug 10, 2:43 PM CDTSevere Thunderstorm WarningARX62 min
Aug 20, 11:05 PM CDTSpecial Weather StatementARX55 min
Aug 20, 11:56 PM CDTSpecial Weather StatementARX64 min
Aug 24, 6:00 AM CDTMesoscale DiscussionSPC90 min
Aug 24, 12:44 PM CDTMesoscale DiscussionSPC91 min
Aug 26, 1:12 PM CDTMesoscale DiscussionSPC93 min
Aug 26, 5:45 PM CDTFlood WatchARX13 hr
Aug 27, 3:33 AM CDTFlash Flood WarningARX4 hr
Aug 27, 9:42 AM CDTRiver Flood WarningARX60 hr
Aug 27, 1:53 PM CDTMesoscale DiscussionSPC97 min
Aug 27, 4:01 PM CDTMesoscale DiscussionSPC59 min
Aug 27, 5:15 PM CDTTornado WatchSPC6 hr
Aug 27, 5:30 PM CDTMesoscale DiscussionSPC60 min
Aug 27, 6:52 PM CDTSevere Thunderstorm WarningARX38 min
Aug 27, 7:29 PM CDTSevere Thunderstorm WarningARX46 min
Aug 27, 7:38 PM CDTFlash Flood WatchARX18 hr
Aug 27, 9:57 PM CDTMesoscale DiscussionSPC93 min
Aug 27, 10:26 PM CDTSpecial Weather StatementARX34 min
Aug 27, 11:07 PM CDTSpecial Weather StatementARX23 min
Aug 28, 1:16 AM CDTFlash Flood WarningARX4 hr
Aug 28, 9:39 AM CDTAreal Flood WarningARX30 hr
Sep 20, 12:38 PM CDTMesoscale DiscussionSPC2 hr
Sep 20, 2:07 PM CDTSevere Thunderstorm WatchSPC7 hr
Sep 20, 3:55 PM CDTMesoscale DiscussionSPC95 min
Sep 20, 5:06 PM CDTSpecial Weather StatementARX24 min
Sep 20, 5:52 PM CDTMesoscale DiscussionSPC113 min
Oct 8, 9:34 PM CDTDense Fog AdvisoryARX12 hr
Oct 21, 3:07 AM CDTFreeze WarningARX30 hr
Oct 22, 1:56 PM CDTFreeze WarningARX19 hr
Dec 5, 3:03 AM CSTWind AdvisoryARX30 hr
Dec 8, 2:41 AM CSTWinter Storm WatchARX35 hr
Dec 9, 5:23 AM CSTWinter Weather AdvisoryARX4 hr
Dec 9, 1:50 PM CSTWinter Weather AdvisoryARX43 hr
Dec 13, 3:25 AM CSTHigh Wind WatchARX35 hr
Dec 14, 2:46 PM CSTHigh Wind WarningARX39 hr
Dec 15, 4:51 PM CSTMesoscale DiscussionSPC114 min
Dec 15, 5:30 PM CSTTornado WatchSPC6 hr
Dec 15, 7:11 PM CSTMesoscale DiscussionSPC2 hr
Dec 15, 7:29 PM CSTSevere Thunderstorm Warning Considerable damage threatARX61 min
Dec 15, 7:38 PM CSTTornado WarningARX37 min
Dec 24, 7:47 AM CSTDense Fog AdvisoryARX6 hr
Dec 26, 2:27 AM CSTWinter Weather AdvisoryARX34 hr
Dec 27, 2:38 PM CSTWinter Weather AdvisoryARX33 hr
Dec 28, 8:59 AM CSTMesoscale DiscussionSPC5 hr
Dec 30, 8:47 PM CSTDense Fog AdvisoryARX14 hr
Dec 31, 12:32 PM CSTWinter Weather AdvisoryARX8 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 archive20202022

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.