Alert archive / Wisconsin / Monroe County

Weather alerts in Monroe County, Wisconsin, 2009

69 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Monroe County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
69
Warnings
14
Watches
12
Advisories
24
Busiest month
August11 alerts
Busiest day
July 27, 20096 alerts

Over time

By month

Warning verification

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

Monroe County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings6350%5100%22 min
Flash flood warnings10100%0

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS La Crosse, WI: tornado warnings24771%1471%18 min
NWS La Crosse, WI: severe thunderstorm warnings785036%15185%25 min
NWS La Crosse, WI: flash flood warnings151033%2277%131 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 3, 3:48 AM CSTWinter Weather AdvisoryARX24 hr
Jan 3, 6:16 PM CSTMesoscale DiscussionSPC5 hr
Jan 8, 2:37 PM CSTWinter Weather AdvisoryARX23 hr
Jan 11, 3:35 PM CSTWinter Weather AdvisoryARX32 hr
Jan 12, 3:41 AM CSTWind Chill AdvisoryARX32 hr
Jan 14, 4:17 AM CSTWind Chill WarningARX56 hr
Jan 23, 3:41 AM CSTWind Chill AdvisoryARX32 hr
Feb 2, 3:20 PM CSTWind Chill AdvisoryARX19 hr
Feb 16, 3:33 PM CSTWinter Storm WatchARX12 hr
Feb 17, 3:43 AM CSTWinter Weather AdvisoryARX35 hr
Feb 20, 3:37 AM CSTWinter Weather AdvisoryARX35 hr
Feb 20, 11:57 PM CSTMesoscale DiscussionSPC5 hr
Feb 24, 3:21 PM CSTWinter Storm WatchARX36 hr
Feb 25, 3:36 PM CSTWinter Storm WarningARX32 hr
Feb 26, 3:07 AM CSTWinter Weather AdvisoryARX21 hr
Feb 26, 11:47 AM CSTMesoscale DiscussionSPC5 hr
Mar 5, 9:18 PM CSTDense Fog AdvisoryARX7 hr
Mar 7, 3:39 PM CSTWinter Weather AdvisoryARX24 hr
Mar 8, 12:11 PM CDTWinter Storm WarningARX7 hr
Mar 8, 12:58 PM CDTMesoscale DiscussionSPC4 hr
Mar 10, 4:08 AM CDTWind AdvisoryARX30 hr
Apr 2, 3:15 PM CDTWinter Storm WatchARX44 hr
Apr 4, 10:53 AM CDTWinter Weather AdvisoryARX29 hr
Apr 23, 9:51 AM CDTRed Flag WarningARX9 hr
Apr 24, 3:18 PM CDTMesoscale DiscussionSPC2 hr
Apr 24, 4:45 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 24, 7:42 PM CDTMesoscale DiscussionSPC63 min
Apr 24, 9:40 PM CDTMesoscale DiscussionSPC65 min
Apr 24, 10:56 PM CDTSevere Thunderstorm WarningARX29 min
Apr 26, 3:45 AM CDTFlash Flood WatchARX24 hr
May 16, 4:04 AM CDTFrost AdvisoryARX27 hr
Jun 18, 8:23 PM CDTMesoscale DiscussionSPC97 min
Jun 18, 8:58 PM CDTTornado WatchSPC7 hr
Jun 18, 10:00 PM CDTSevere Thunderstorm WarningARX45 min
Jun 18, 10:36 PM CDTSevere Thunderstorm WarningARX24 min
Jun 22, 3:09 PM CDTHeat AdvisoryARX27 hr
Jul 24, 9:51 AM CDTMesoscale DiscussionSPC54 min
Jul 27, 2:10 PM CDTMesoscale DiscussionSPC65 min
Jul 27, 2:41 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 27, 3:29 PM CDTSevere Thunderstorm WarningARX46 min
Jul 27, 4:12 PM CDTSevere Thunderstorm WarningARX48 min
Jul 27, 4:44 PM CDTSevere Thunderstorm WarningARX61 min
Jul 27, 6:45 PM CDTMesoscale DiscussionSPC90 min
Aug 2, 11:21 PM CDTMesoscale DiscussionSPC84 min
Aug 2, 11:37 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 3, 3:48 AM CDTAreal Flood AdvisoryARX119 min
Aug 8, 1:29 AM CDTMesoscale DiscussionSPC2 hr
Aug 8, 3:41 AM CDTFlash Flood WatchARX23 hr
Aug 8, 4:31 AM CDTFlash Flood WarningARX2 hr
Aug 19, 4:34 PM CDTMesoscale DiscussionSPC56 min
Aug 19, 4:49 PM CDTTornado WatchSPC5 hr
Aug 19, 7:45 PM CDTMesoscale DiscussionSPC90 min
Aug 20, 1:51 PM CDTMesoscale DiscussionSPC114 min
Aug 28, 5:13 PM CDTMesoscale DiscussionSPC62 min
Sep 25, 2:27 AM CDTDense Fog AdvisoryARX6 hr
Sep 26, 3:26 PM CDTWind AdvisoryARX52 hr
Sep 29, 4:02 AM CDTFrost AdvisoryARX28 hr
Oct 27, 3:37 AM CDTDense Fog AdvisoryARX6 hr
Nov 20, 9:48 PM CSTDense Fog AdvisoryARX12 hr
Dec 6, 3:11 PM CSTWinter Storm WatchARX25 hr
Dec 7, 3:50 PM CSTBlizzard WarningARX48 hr
Dec 7, 3:50 PM CSTWinter Storm WarningARX22 hr
Dec 8, 6:00 PM CSTMesoscale DiscussionSPC5 hr
Dec 9, 10:22 AM CSTMesoscale DiscussionSPC4 hr
Dec 9, 3:34 PM CSTWind Chill AdvisoryARX19 hr
Dec 13, 3:20 AM CSTWinter Weather AdvisoryARX33 hr
Dec 21, 3:34 PM CSTWinter Storm WatchARX36 hr
Dec 23, 3:58 AM CSTWinter Storm WarningARX48 hr
Dec 24, 11:57 AM CSTWinter Weather AdvisoryARX27 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 archive20082010

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.