Alert archive / Wisconsin / Douglas County

Weather alerts in Douglas County, Wisconsin, 2009

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

Douglas County and its neighbors

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

Alerts
101
Warnings
23
Watches
11
Advisories
35
Busiest month
July16 alerts
Busiest day
May 5, 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.

Douglas County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10280%0
Flash flood warnings00

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Duluth, MN: tornado warnings10100%0
NWS Duluth, MN: severe thunderstorm warnings491569%2396%22 min
NWS Duluth, MN: flash flood warnings220%2100%56 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 1, 3:14 PM CSTWinter Storm WatchDLH24 hr
Jan 2, 3:38 PM CSTWinter Storm WarningDLH38 hr
Jan 4, 11:53 AM CSTWind Chill AdvisoryDLH21 hr
Jan 7, 7:15 PM CSTLake Effect Snow AdvisoryDLH6 hr
Jan 11, 9:15 AM CSTWind Chill WatchDLH19 hr
Jan 12, 4:31 AM CSTWind Chill WarningDLH31 hr
Jan 14, 4:01 AM CSTWind Chill WarningDLH56 hr
Jan 14, 4:01 AM CSTWind Chill AdvisoryDLH12 hr
Jan 16, 11:35 PM CSTWinter Weather AdvisoryDLH15 hr
Jan 23, 4:15 AM CSTWind Chill AdvisoryDLH4 days
Feb 1, 3:49 PM CSTLake Effect Snow AdvisoryDLH28 hr
Feb 2, 6:37 PM CSTLake Effect Snow WarningDLH17 hr
Feb 6, 3:14 PM CSTWinter Storm WatchDLH48 hr
Feb 8, 3:27 PM CSTFreezing Rain AdvisoryDLH30 hr
Feb 17, 3:45 AM CSTWinter Weather AdvisoryDLH41 hr
Feb 18, 3:47 AM CSTWind Chill AdvisoryDLH23 hr
Feb 25, 3:40 AM CSTWinter Storm WatchDLH12 hr
Feb 25, 4:44 AM CSTWinter Weather AdvisoryDLH4 hr
Feb 25, 3:45 PM CSTWinter Weather AdvisoryDLH42 hr
Mar 8, 4:48 AM CDTWinter Storm WatchDLH35 hr
Mar 9, 3:41 PM CDTWinter Storm WarningDLH44 hr
Mar 11, 9:14 PM CDTWind Chill AdvisoryDLH14 hr
Mar 20, 7:05 AM CDTWinter Weather AdvisoryDLH13 hr
Mar 24, 11:51 AM CDTAreal Flood AdvisoryDLH23 hr
Mar 25, 11:08 AM CDTAreal Flood AdvisoryDLH5 days
Mar 25, 11:21 AM CDTAreal Flood AdvisoryDLH6 days
Mar 26, 9:07 AM CDTAreal Flood WarningDLH22 hr
Mar 29, 3:48 AM CDTWinter Storm WatchDLH30 hr
Mar 29, 4:01 PM CDTWinter Storm WarningDLH70 hr
Mar 30, 10:07 AM CDTWinter Weather AdvisoryDLH48 hr
Mar 31, 1:26 PM CDTMesoscale DiscussionSPC3 hr
Apr 23, 9:25 AM CDTRed Flag WarningDLH10 hr
May 5, 3:28 PM CDTSevere Thunderstorm WarningDLH32 min
May 5, 3:49 PM CDTSevere Thunderstorm WarningDLH41 min
May 5, 3:54 PM CDTSevere Thunderstorm WarningDLH51 min
May 5, 3:55 PM CDTSevere Thunderstorm WarningDLH50 min
May 5, 4:14 PM CDTSevere Thunderstorm WarningDLH21 min
May 5, 4:39 PM CDTSevere Thunderstorm WarningDLH28 min
May 30, 2:25 PM CDTFrost AdvisoryDLH17 hr
Jun 2, 9:39 AM CDTFrost AdvisoryDLH21 hr
Jun 5, 3:48 PM CDTFrost AdvisoryDLH14 hr
Jun 13, 2:15 PM CDTMesoscale DiscussionSPC60 min
Jun 18, 7:00 PM CDTMesoscale DiscussionSPC90 min
Jun 18, 7:34 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 23, 2:39 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 23, 7:33 PM CDTMesoscale DiscussionSPC27 min
Jun 28, 3:34 AM CDTWind AdvisoryDLH11 hr
Jul 14, 6:31 PM CDTSpecial Weather StatementDLH89 min
Jul 14, 7:07 PM CDTSpecial Weather StatementDLH53 min
Jul 14, 8:30 PM CDTSpecial Weather StatementDLH30 min
Jul 14, 9:06 PM CDTSpecial Weather StatementDLH24 min
Jul 14, 9:36 PM CDTSevere Thunderstorm WarningDLH39 min
Jul 14, 10:01 PM CDTSevere Thunderstorm WarningDLH44 min
Jul 14, 10:02 PM CDTDense Fog AdvisoryDLH6 hr
Jul 21, 6:16 PM CDTSpecial Weather StatementDLH59 min
Jul 21, 6:52 PM CDTSpecial Weather StatementDLH53 min
Jul 21, 7:08 PM CDTSpecial Weather StatementDLH52 min
Jul 22, 2:12 PM CDTSpecial Weather StatementDLH33 min
Jul 22, 2:20 PM CDTSpecial Weather StatementDLH25 min
Jul 22, 2:41 PM CDTSpecial Weather StatementDLH34 min
Jul 22, 3:12 PM CDTSpecial Weather StatementDLH33 min
Jul 24, 5:34 AM CDTSevere Thunderstorm WarningDLH39 min
Jul 30, 3:30 PM CDTSpecial Weather StatementDLH45 min
Aug 1, 4:34 PM CDTSpecial Weather StatementDLH26 min
Aug 8, 10:27 PM CDTSpecial Weather StatementDLH18 min
Aug 8, 10:54 PM CDTSevere Thunderstorm WarningDLH57 min
Aug 15, 1:55 PM CDTMesoscale DiscussionSPC95 min
Aug 16, 12:54 AM CDTSpecial Weather StatementDLH66 min
Aug 16, 2:08 AM CDTSpecial Weather StatementDLH52 min
Aug 16, 3:29 AM CDTSpecial Weather StatementDLH61 min
Aug 19, 3:00 PM CDTAreal Flood AdvisoryDLH6 hr
Aug 19, 3:00 PM CDTSpecial Weather StatementDLH105 min
Aug 19, 5:25 PM CDTSpecial Weather StatementDLH50 min
Aug 19, 6:17 PM CDTSpecial Weather StatementDLH43 min
Aug 19, 7:14 PM CDTSpecial Weather StatementDLH16 min
Aug 19, 7:49 PM CDTHigh Wind WarningDLH99 min
Aug 19, 8:37 PM CDTAreal Flood AdvisoryDLH6 hr
Aug 28, 4:47 AM CDTSpecial Weather StatementDLH58 min
Aug 30, 11:01 AM CDTFrost AdvisoryDLH15 hr
Sep 9, 2:45 PM CDTSpecial Weather StatementDLH60 min
Sep 9, 11:38 PM CDTDense Fog AdvisoryDLH10 hr
Sep 12, 3:28 AM CDTDense Fog AdvisoryDLH6 hr
Sep 13, 3:21 AM CDTDense Fog AdvisoryDLH7 hr
Sep 13, 3:29 PM CDTDense Fog AdvisoryDLH18 hr
Sep 27, 8:31 AM CDTSpecial Weather StatementDLH44 min
Sep 27, 8:32 AM CDTSpecial Weather StatementDLH43 min
Sep 27, 2:04 PM CDTSpecial Weather StatementDLH61 min
Sep 27, 3:00 PM CDTMesoscale DiscussionSPC2 hr
Sep 28, 3:40 AM CDTFreeze WatchDLH24 hr
Sep 28, 3:40 AM CDTWind AdvisoryDLH15 hr
Sep 29, 3:42 AM CDTFreeze WarningDLH28 hr
Oct 2, 3:05 AM CDTWind AdvisoryDLH18 hr
Oct 30, 3:02 AM CDTDense Fog AdvisoryDLH7 hr
Nov 22, 12:41 PM CSTDense Fog AdvisoryDLH39 hr
Dec 6, 3:46 PM CSTWinter Storm WatchDLH24 hr
Dec 7, 3:53 PM CSTWinter Storm WarningDLH60 hr
Dec 10, 2:49 PM CSTWind Chill AdvisoryDLH18 hr
Dec 14, 1:29 PM CSTWind Chill AdvisoryDLH20 hr
Dec 22, 3:49 AM CSTWinter Storm WatchDLH25 hr
Dec 22, 2:46 PM CSTWinter Storm WarningDLH4 days
Dec 23, 2:13 PM CSTBlizzard WarningDLH49 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.