Alert archive / Wisconsin / Vernon County

Weather alerts in Vernon County, Wisconsin, 2020

91 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Vernon County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
91
Warnings
14
Watches
10
Advisories
28
Busiest month
June17 alerts
Busiest day
June 2, 20205 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 Vernon County in 2020 had a tornado report inside them.

Vernon County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings440%475%25 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS La Crosse, WI: tornado warnings8363%1155%9 min
NWS La Crosse, WI: severe thunderstorm warnings994852%18270%22 min
NWS La Crosse, WI: flash flood warnings12925%3485%127 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 8, 2:55 PM CSTWinter Weather AdvisoryARX27 hr
Jan 10, 2:59 AM CSTWinter Weather AdvisoryARX24 hr
Jan 13, 2:04 PM CSTWinter Weather AdvisoryARX16 hr
Jan 14, 1:57 PM CSTWinter Weather AdvisoryARX22 hr
Jan 15, 3:25 PM CSTWinter Storm WatchARX21 hr
Jan 16, 12:42 PM CSTWinter Weather AdvisoryARX53 hr
Jan 18, 2:18 PM CSTWind Chill AdvisoryARX22 hr
Feb 7, 2:37 AM CSTWinter Storm WatchARX25 hr
Feb 8, 3:49 AM CSTWinter Storm WarningARX38 hr
Feb 9, 6:39 AM CSTMesoscale DiscussionSPC4 hr
Feb 9, 10:56 AM CSTMesoscale DiscussionSPC5 hr
Feb 12, 4:11 AM CSTWind Chill AdvisoryARX54 hr
Feb 16, 3:05 PM CSTWinter Weather AdvisoryARX33 hr
Feb 17, 3:27 PM CSTMesoscale DiscussionSPC4 hr
Mar 28, 4:34 PM CDTSpecial Weather StatementARX71 min
Mar 30, 8:39 PM CDTRiver Flood WarningARX14 days
Apr 7, 3:31 AM CDTDense Fog AdvisoryARX6 hr
Apr 8, 12:48 AM CDTDense Fog AdvisoryARX8 hr
Apr 11, 2:44 PM CDTWinter Weather AdvisoryARX39 hr
Apr 22, 5:03 PM CDTSpecial Weather StatementARX42 min
May 7, 9:48 AM CDTFreeze WatchARX17 hr
May 7, 9:48 AM CDTFreeze WarningARX23 hr
May 8, 3:13 AM CDTFreeze WarningARX29 hr
May 10, 2:51 AM CDTFreeze WarningARX29 hr
May 11, 2:41 PM CDTFreeze WarningARX17 hr
May 26, 6:17 PM CDTSpecial Weather StatementARX28 min
May 26, 6:32 PM CDTSpecial Weather StatementARX28 min
May 26, 6:34 PM CDTSpecial Weather StatementARX26 min
May 26, 6:55 PM CDTSpecial Weather StatementARX20 min
May 26, 7:16 PM CDTSpecial Weather StatementARX29 min
May 28, 3:47 AM CDTFlash Flood WatchARX10 hr
Jun 2, 3:52 PM CDTMesoscale DiscussionSPC113 min
Jun 2, 4:39 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 2, 5:32 PM CDTMesoscale DiscussionSPC118 min
Jun 2, 6:32 PM CDTSevere Thunderstorm WarningARX43 min
Jun 2, 6:59 PM CDTSevere Thunderstorm WarningARX61 min
Jun 2, 7:07 PM CDTSevere Thunderstorm WarningARX53 min
Jun 2, 8:31 PM CDTSpecial Weather StatementARX59 min
Jun 2, 9:11 PM CDTSpecial Weather StatementARX64 min
Jun 4, 10:50 PM CDTMesoscale DiscussionSPC115 min
Jun 8, 3:21 AM CDTFlash Flood WatchARX47 hr
Jun 10, 8:41 PM CDTRiver Flood WarningARX15 hr
Jun 11, 3:26 PM CDTMesoscale DiscussionSPC94 min
Jun 21, 9:01 PM CDTSpecial Weather StatementARX44 min
Jun 21, 9:09 PM CDTMesoscale DiscussionSPC2 hr
Jun 26, 12:38 PM CDTMesoscale DiscussionSPC2 hr
Jun 29, 1:28 PM CDTMesoscale DiscussionSPC92 min
Jun 29, 3:38 PM CDTSpecial Weather StatementARX22 min
Jul 7, 1:23 PM CDTMesoscale DiscussionSPC2 hr
Jul 7, 3:38 PM CDTHeat AdvisoryARX27 hr
Jul 9, 10:24 AM CDTMesoscale DiscussionSPC3 hr
Jul 9, 11:05 AM CDTSevere Thunderstorm WatchSPC8 hr
Jul 9, 2:29 PM CDTSevere Thunderstorm WarningARX61 min
Jul 9, 2:51 PM CDTMesoscale DiscussionSPC114 min
Jul 9, 3:32 PM CDTSpecial Weather StatementARX28 min
Jul 14, 3:14 PM CDTMesoscale DiscussionSPC2 hr
Jul 14, 4:11 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 14, 7:01 PM CDTSpecial Weather StatementARX89 min
Jul 16, 2:14 AM CDTDense Fog AdvisoryARX7 hr
Jul 17, 2:35 AM CDTHeat AdvisoryARX41 hr
Jul 18, 6:14 AM CDTSpecial Weather StatementARX61 min
Jul 21, 5:46 PM CDTTornado WarningARX30 min
Jul 21, 6:13 PM CDTMesoscale DiscussionSPC62 min
Jul 25, 2:44 AM CDTHeat AdvisoryARX17 hr
Aug 8, 5:00 PM CDTMesoscale DiscussionSPC2 hr
Aug 9, 1:30 PM CDTMesoscale DiscussionSPC2 hr
Aug 9, 10:59 PM CDTMesoscale DiscussionSPC3 hr
Aug 10, 2:30 AM CDTMesoscale DiscussionSPC90 min
Aug 10, 6:42 AM CDTMesoscale DiscussionSPC2 hr
Aug 24, 3:21 AM CDTHeat AdvisoryARX16 hr
Aug 24, 4:00 PM CDTMesoscale DiscussionSPC90 min
Aug 25, 2:48 AM CDTHeat AdvisoryARX16 hr
Aug 26, 2:53 AM CDTHeat AdvisoryARX16 hr
Aug 27, 10:43 PM CDTSpecial Weather StatementARX47 min
Aug 28, 7:35 AM CDTSpecial Weather StatementARX70 min
Aug 28, 8:33 AM CDTSpecial Weather StatementARX72 min
Sep 25, 12:32 AM CDTDense Fog AdvisoryARX7 hr
Oct 1, 3:56 AM CDTFrost AdvisoryARX28 hr
Oct 3, 1:44 PM CDTFrost AdvisoryARX18 hr
Oct 4, 10:37 AM CDTFrost AdvisoryARX21 hr
Oct 12, 3:42 AM CDTSpecial Weather StatementARX48 min
Oct 15, 1:30 PM CDTFreeze WarningARX18 hr
Oct 23, 9:52 AM CDTRiver Flood WatchARX4 days
Oct 31, 11:48 PM CDTWind AdvisoryARX15 hr
Nov 14, 2:06 PM CSTWind AdvisoryARX28 hr
Nov 23, 2:19 PM CSTWinter Weather AdvisoryARX30 hr
Nov 24, 7:49 PM CSTDense Fog AdvisoryARX12 hr
Dec 27, 4:11 AM CSTWinter Weather AdvisoryARX15 hr
Dec 28, 3:45 AM CSTWinter Storm WatchARX11 hr
Dec 28, 3:45 AM CSTWinter Weather AdvisoryARX53 hr
Dec 28, 2:31 PM CSTWinter Storm WarningARX37 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 archive20192021

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.