Alert archive / Minnesota / Washington County

Weather alerts in Washington County, Minnesota, 2018

112 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Washington County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
112
Warnings
30
Watches
19
Advisories
26
Busiest month
May18 alerts
Busiest day
September 20, 20186 alerts

Over time

By month

Warning verification

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

Washington County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings13931%6100%28 min
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Twin Cities, MN: tornado warnings12742%3077%16 min
NWS Twin Cities, MN: severe thunderstorm warnings1597354%31166%21 min
NWS Twin Cities, MN: flash flood warnings8188%1030%87 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, 10:54 AM CSTWind Chill AdvisoryMPX23 hr
Jan 9, 3:29 AM CSTWinter Storm WatchMPX35 hr
Jan 10, 3:22 AM CSTWinter Weather AdvisoryMPX39 hr
Jan 11, 12:02 PM CSTWind Chill AdvisoryMPX22 hr
Jan 12, 2:58 PM CSTWind Chill AdvisoryMPX18 hr
Jan 14, 3:41 AM CSTWind Chill AdvisoryMPX53 hr
Jan 19, 4:04 AM CSTWinter Storm WatchMPX59 hr
Jan 20, 3:48 PM CSTWinter Storm WarningMPX56 hr
Jan 22, 9:20 AM CSTMesoscale DiscussionSPC6 hr
Jan 22, 3:15 PM CSTMesoscale DiscussionSPC6 hr
Jan 31, 2:02 PM CSTWind Chill AdvisoryMPX22 hr
Feb 3, 2:57 AM CSTWind Chill AdvisoryMPX33 hr
Feb 18, 4:04 AM CSTWinter Weather AdvisoryMPX56 hr
Feb 21, 2:59 PM CSTWinter Weather AdvisoryMPX41 hr
Feb 22, 2:24 PM CSTWinter Storm WatchMPX24 hr
Feb 23, 2:16 PM CSTWinter Storm WarningMPX37 hr
Feb 24, 4:46 PM CSTMesoscale DiscussionSPC5 hr
Mar 3, 3:39 AM CSTWinter Storm WatchMPX36 hr
Mar 4, 3:10 PM CSTWinter Storm WarningMPX36 hr
Mar 5, 1:17 PM CSTMesoscale DiscussionSPC4 hr
Mar 30, 3:49 AM CDTWinter Storm WarningMPX30 hr
Mar 30, 3:49 AM CDTWinter Weather AdvisoryMPX30 hr
Mar 30, 10:16 PM CDTMesoscale DiscussionSPC3 hr
Apr 2, 9:46 AM CDTWinter Weather AdvisoryMPX39 hr
Apr 2, 11:14 AM CDTWinter Storm WarningMPX38 hr
Apr 11, 3:44 PM CDTWinter Storm WatchMPX47 hr
Apr 12, 3:41 PM CDTBlizzard WarningMPX60 hr
Apr 12, 9:34 PM CDTWinter Storm WarningMPX3 days
Apr 13, 3:12 PM CDTWinter Weather AdvisoryMPX57 hr
Apr 14, 6:02 PM CDTMesoscale DiscussionSPC6 hr
Apr 24, 9:21 PM CDTRiver Flood WarningMPX10 days
Apr 25, 10:27 AM CDTRiver Flood WarningMPX7 days
Apr 28, 3:13 PM CDTFire Weather WatchMPX12 hr
Apr 29, 3:42 AM CDTRed Flag WarningMPX17 hr
May 3, 3:17 PM CDTFire Weather WatchMPX13 hr
May 4, 3:50 AM CDTRed Flag WarningMPX15 hr
May 24, 7:43 PM CDTSevere Thunderstorm WarningMPX47 min
May 25, 5:03 PM CDTSevere Thunderstorm WarningMPX57 min
May 25, 5:17 PM CDTSpecial Weather StatementMPX43 min
May 25, 5:20 PM CDTMesoscale DiscussionSPC115 min
May 25, 6:29 PM CDTMesoscale DiscussionSPC2 hr
May 26, 2:24 PM CDTHeat AdvisoryMPX47 hr
May 27, 3:52 PM CDTExcessive Heat WatchMPX12 hr
May 28, 3:50 AM CDTExcessive Heat WarningMPX15 hr
May 28, 5:01 PM CDTSevere Thunderstorm WarningMPX29 min
May 28, 5:29 PM CDTSevere Thunderstorm WarningMPX31 min
May 29, 3:03 AM CDTHeat AdvisoryMPX14 hr
May 29, 1:43 PM CDTSevere Thunderstorm WatchSPC6 hr
May 29, 2:35 PM CDTSpecial Weather StatementMPX70 min
May 29, 3:54 PM CDTMesoscale DiscussionSPC96 min
May 29, 5:34 PM CDTMesoscale DiscussionSPC56 min
May 31, 1:00 AM CDTDense Fog AdvisoryMPX8 hr
Jun 6, 5:02 AM CDTSpecial Weather StatementMPX43 min
Jun 11, 12:09 PM CDTSpecial Weather StatementMPX66 min
Jun 15, 3:05 AM CDTHeat AdvisoryMPX8 hr
Jun 15, 11:18 AM CDTExcessive Heat WarningMPX56 hr
Jun 16, 8:05 AM CDTSpecial Weather StatementMPX55 min
Jun 17, 12:12 PM CDTMesoscale DiscussionSPC93 min
Jun 17, 12:34 PM CDTTornado WatchSPC8 hr
Jun 17, 2:44 PM CDTFlash Flood WatchMPX16 hr
Jun 17, 3:08 PM CDTMesoscale DiscussionSPC97 min
Jun 17, 5:23 PM CDTMesoscale DiscussionSPC2 hr
Jun 17, 7:49 PM CDTSpecial Weather StatementMPX26 min
Jun 24, 1:04 PM CDTSpecial Weather StatementMPX56 min
Jun 26, 10:05 AM CDTRiver Flood WarningMPX4 days
Jun 28, 2:24 AM CDTExcessive Heat WatchMPX20 hr
Jun 28, 2:46 PM CDTExcessive Heat WarningMPX31 hr
Jun 30, 1:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 1, 12:06 PM CDTSpecial Weather StatementMPX54 min
Jul 3, 3:25 AM CDTExcessive Heat WatchMPX24 hr
Jul 3, 11:42 AM CDTSpecial Weather StatementMPX63 min
Jul 4, 3:35 AM CDTHeat AdvisoryMPX11 hr
Jul 4, 1:53 PM CDTSpecial Weather StatementMPX52 min
Jul 4, 2:20 PM CDTSpecial Weather StatementMPX25 min
Jul 10, 4:02 AM CDTExcessive Heat WatchMPX11 hr
Jul 10, 3:03 PM CDTHeat AdvisoryMPX52 hr
Jul 12, 4:47 PM CDTMesoscale DiscussionSPC88 min
Jul 12, 5:04 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 12, 5:18 PM CDTSevere Thunderstorm WarningMPX27 min
Jul 12, 7:35 PM CDTMesoscale DiscussionSPC85 min
Jul 14, 3:04 AM CDTDense Fog AdvisoryMPX5 hr
Jul 25, 3:47 PM CDTMesoscale DiscussionSPC88 min
Aug 3, 9:24 AM CDTSpecial Weather StatementMPX36 min
Aug 3, 9:43 AM CDTSevere Thunderstorm WarningMPX32 min
Aug 4, 12:17 AM CDTSevere Thunderstorm WarningMPX28 min
Aug 8, 12:37 AM CDTDense Fog AdvisoryMPX8 hr
Aug 24, 10:37 AM CDTSpecial Weather StatementMPX38 min
Aug 25, 2:54 AM CDTDense Fog AdvisoryMPX7 hr
Aug 26, 6:25 AM CDTSevere Thunderstorm WarningMPX50 min
Aug 27, 2:24 PM CDTMesoscale DiscussionSPC96 min
Aug 27, 2:57 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 27, 5:02 PM CDTSevere Thunderstorm WarningMPX58 min
Aug 27, 6:03 PM CDTSevere Thunderstorm WarningMPX57 min
Sep 15, 3:01 AM CDTHeat AdvisoryMPX15 hr
Sep 17, 1:34 PM CDTSpecial Weather StatementMPX41 min
Sep 17, 2:08 PM CDTSpecial Weather StatementMPX67 min
Sep 17, 2:17 PM CDTSevere Thunderstorm WarningMPX43 min
Sep 18, 8:30 AM CDTSpecial Weather StatementMPX30 min
Sep 20, 2:07 PM CDTSpecial Weather StatementMPX38 min
Sep 20, 2:15 PM CDTMesoscale DiscussionSPC3 hr
Sep 20, 3:33 PM CDTTornado WatchSPC4 hr
Sep 20, 5:29 PM CDTMesoscale DiscussionSPC2 hr
Sep 20, 5:54 PM CDTAreal Flood WarningMPX3 hr
Sep 20, 6:41 PM CDTSevere Thunderstorm WarningMPX34 min
Sep 28, 3:21 AM CDTFreeze WarningMPX30 hr
Oct 3, 5:37 PM CDTSevere Thunderstorm WarningMPX53 min
Oct 7, 3:21 PM CDTFlood WatchMPX60 hr
Nov 30, 2:24 PM CSTWinter Weather AdvisoryMPX46 hr
Dec 12, 7:36 AM CSTSpecial Weather StatementMPX114 min
Dec 13, 6:40 PM CSTDense Fog AdvisoryMPX15 hr
Dec 26, 3:32 AM CSTWinter Weather AdvisoryMPX26 hr
Dec 27, 2:07 PM CSTWinter Weather AdvisoryMPX22 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 archive20172019

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.