Alert archive / Minnesota / Washington County

Weather alerts in Washington County, Minnesota, 2010

144 weather alerts in 2010, 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 2010. Tap one for its archive.

Alerts
144
Warnings
40
Watches
29
Advisories
37
Busiest month
August39 alerts
Busiest day
August 13, 201013 alerts

Over time

By month

Warning verification

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

1 of 3 tornado warnings covering Washington County in 2010 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Washington County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings3167%10%
Severe thunderstorm warnings19858%1164%43 min
Flash flood warnings440%10%

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Twin Cities, MN: tornado warnings973366%10368%19 min
NWS Twin Cities, MN: severe thunderstorm warnings26914945%54268%26 min
NWS Twin Cities, MN: flash flood warnings251540%8660%71 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, 2:22 PM CSTWind Chill AdvisoryMPX19 hr
Jan 7, 1:57 PM CSTWind Chill AdvisoryMPX34 hr
Jan 18, 3:44 PM CSTDense Fog AdvisoryMPX23 hr
Jan 21, 6:25 PM CSTWinter Weather AdvisoryMPX6 hr
Jan 22, 11:50 AM CSTWinter Weather AdvisoryMPX28 hr
Feb 4, 2:10 PM CSTWinter Weather AdvisoryMPX25 hr
Feb 7, 3:15 PM CSTWinter Weather AdvisoryMPX51 hr
Feb 12, 3:55 PM CSTDense Fog AdvisoryMPX20 hr
Feb 13, 9:50 AM CSTWinter Weather AdvisoryMPX50 hr
Mar 7, 2:55 PM CSTDense Fog AdvisoryMPX18 hr
Mar 9, 4:10 PM CSTDense Fog AdvisoryMPX41 hr
Mar 11, 2:41 PM CSTDense Fog AdvisoryMPX21 hr
Mar 13, 2:59 PM CSTRiver Flood WatchMPX6 days
Mar 13, 3:54 PM CSTRiver Flood WatchMPX21 hr
Mar 14, 2:00 PM CDTRiver Flood WarningMPX18 days
Mar 14, 2:00 PM CDTRiver Flood WarningMPX18 days
Mar 18, 11:44 AM CDTRiver Flood WarningMPX6 days
Mar 22, 5:15 PM CDTAreal Flood WarningMPX11 days
May 1, 2:35 AM CDTWind AdvisoryMPX16 hr
May 4, 2:49 PM CDTMesoscale DiscussionSPC56 min
May 8, 3:48 AM CDTFreeze WarningMPX29 hr
Jun 15, 2:01 PM CDTMesoscale DiscussionSPC89 min
Jun 17, 1:54 PM CDTTornado WatchSPC8 hr
Jun 17, 7:12 PM CDTSpecial Weather StatementMPX2 hr
Jun 17, 7:39 PM CDTMesoscale DiscussionSPC96 min
Jun 22, 4:09 PM CDTMesoscale DiscussionSPC96 min
Jun 22, 9:00 PM CDTSevere Thunderstorm WatchSPC9 hr
Jun 22, 11:47 PM CDTMesoscale DiscussionSPC88 min
Jun 23, 1:49 AM CDTMesoscale DiscussionSPC86 min
Jun 23, 2:36 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 23, 2:58 AM CDTSpecial Weather StatementMPX77 min
Jun 25, 3:35 PM CDTTornado WatchSPC8 hr
Jun 25, 5:51 PM CDTSevere Thunderstorm WarningMPX54 min
Jun 25, 5:57 PM CDTMesoscale DiscussionSPC2 hr
Jun 25, 6:24 PM CDTFlash Flood WarningMPX3 hr
Jun 25, 7:09 PM CDTSevere Thunderstorm WarningMPX36 min
Jun 26, 4:34 AM CDTFlash Flood WatchMPX22 hr
Jun 26, 9:53 PM CDTSevere Thunderstorm WarningMPX82 min
Jun 26, 10:14 PM CDTAreal Flood AdvisoryMPX4 hr
Jun 26, 10:57 PM CDTFlash Flood WarningMPX3 hr
Jun 27, 12:31 AM CDTSpecial Weather StatementMPX59 min
Jul 5, 11:49 AM CDTSpecial Weather StatementMPX41 min
Jul 5, 8:56 PM CDTAreal Flood AdvisoryMPX3 hr
Jul 7, 5:20 PM CDTSpecial Weather StatementMPX85 min
Jul 10, 11:41 AM CDTMesoscale DiscussionSPC94 min
Jul 11, 4:25 PM CDTSevere Thunderstorm WarningMPX39 min
Jul 14, 3:12 AM CDTHeat AdvisoryMPX15 hr
Jul 14, 8:26 AM CDTMesoscale DiscussionSPC64 min
Jul 14, 9:00 AM CDTTornado WatchSPC9 hr
Jul 14, 12:34 PM CDTMesoscale DiscussionSPC116 min
Jul 14, 2:33 PM CDTSevere Thunderstorm WarningMPX44 min
Jul 14, 4:38 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 17, 11:58 AM CDTMesoscale DiscussionSPC92 min
Jul 17, 12:28 PM CDTTornado WatchSPC11 hr
Jul 17, 5:56 PM CDTMesoscale DiscussionSPC94 min
Jul 17, 8:00 PM CDTSevere Thunderstorm WarningMPX60 min
Jul 17, 8:10 PM CDTTornado WarningMPX35 min
Jul 17, 8:21 PM CDTSevere Thunderstorm WarningMPX54 min
Jul 17, 8:34 PM CDTTornado WarningMPX26 min
Jul 17, 8:51 PM CDTTornado WarningMPX24 min
Jul 17, 9:08 PM CDTAreal Flood AdvisoryMPX6 hr
Jul 17, 9:53 PM CDTSevere Thunderstorm WarningMPX23 min
Jul 20, 2:15 PM CDTMesoscale DiscussionSPC60 min
Jul 27, 3:54 AM CDTHeat AdvisoryMPX15 hr
Jul 27, 1:43 PM CDTMesoscale DiscussionSPC32 min
Jul 27, 3:29 PM CDTTornado WatchSPC7 hr
Jul 27, 6:51 PM CDTSpecial Weather StatementMPX54 min
Jul 27, 7:05 PM CDTMesoscale DiscussionSPC85 min
Aug 4, 8:32 PM CDTSevere Thunderstorm WarningMPX26 min
Aug 7, 5:27 PM CDTTornado WatchSPC8 hr
Aug 7, 8:57 PM CDTMesoscale DiscussionSPC93 min
Aug 7, 10:39 PM CDTMesoscale DiscussionSPC2 hr
Aug 7, 11:59 PM CDTTornado WatchSPC4 hr
Aug 8, 12:45 AM CDTSpecial Weather StatementMPX90 min
Aug 8, 12:47 AM CDTSevere Thunderstorm WarningMPX43 min
Aug 8, 1:43 AM CDTSevere Thunderstorm WarningMPX32 min
Aug 8, 2:25 AM CDTMesoscale DiscussionSPC65 min
Aug 8, 6:30 PM CDTSevere Thunderstorm WatchSPC8 hr
Aug 8, 6:37 PM CDTSevere Thunderstorm WarningMPX53 min
Aug 9, 4:22 AM CDTHeat AdvisoryMPX16 hr
Aug 10, 9:38 AM CDTAreal Flood AdvisoryMPX3 hr
Aug 10, 1:46 PM CDTTornado WatchSPC6 hr
Aug 10, 4:13 PM CDTAreal Flood AdvisoryMPX3 hr
Aug 10, 9:29 PM CDTAreal Flood AdvisoryMPX3 hr
Aug 10, 10:54 PM CDTFlash Flood WarningMPX3 hr
Aug 12, 10:03 AM CDTHeat AdvisoryMPX9 hr
Aug 12, 4:37 PM CDTFlash Flood WatchMPX29 hr
Aug 12, 5:57 PM CDTMesoscale DiscussionSPC63 min
Aug 12, 6:41 PM CDTTornado WatchSPC4 hr
Aug 12, 8:29 PM CDTMesoscale DiscussionSPC61 min
Aug 13, 12:44 AM CDTAreal Flood AdvisoryMPX3 hr
Aug 13, 12:48 AM CDTMesoscale DiscussionSPC57 min
Aug 13, 1:19 AM CDTSevere Thunderstorm WatchSPC4 hr
Aug 13, 1:50 AM CDTSpecial Weather StatementMPX70 min
Aug 13, 2:09 AM CDTFlash Flood WarningMPX3 hr
Aug 13, 3:41 AM CDTSevere Thunderstorm WarningMPX64 min
Aug 13, 4:11 AM CDTSevere Thunderstorm WarningMPX64 min
Aug 13, 4:26 AM CDTSevere Thunderstorm WarningMPX64 min
Aug 13, 4:38 AM CDTSevere Thunderstorm WarningMPX67 min
Aug 13, 5:27 AM CDTSevere Thunderstorm WatchSPC8 hr
Aug 13, 2:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 13, 5:36 PM CDTSevere Thunderstorm WarningMPX54 min
Aug 13, 7:22 PM CDTMesoscale DiscussionSPC53 min
Aug 14, 2:23 PM CDTMesoscale DiscussionSPC67 min
Aug 18, 10:01 AM CDTMesoscale DiscussionSPC119 min
Aug 18, 2:17 PM CDTMesoscale DiscussionSPC118 min
Aug 21, 8:48 PM CDTDense Fog AdvisoryMPX12 hr
Sep 21, 1:37 AM CDTSevere Thunderstorm WarningMPX23 min
Sep 21, 2:01 AM CDTSevere Thunderstorm WarningMPX29 min
Sep 21, 2:04 AM CDTSevere Thunderstorm WatchSPC5 hr
Sep 22, 4:00 AM CDTFlood WatchMPX46 hr
Sep 22, 8:50 PM CDTRiver Flood WatchMPX36 hr
Sep 22, 8:50 PM CDTRiver Flood WatchMPX36 hr
Sep 23, 9:05 PM CDTRiver Flood WarningMPX14 days
Sep 23, 9:05 PM CDTRiver Flood WarningMPX13 days
Sep 24, 4:24 AM CDTWind AdvisoryMPX9 hr
Sep 29, 4:18 PM CDTAreal Flood WarningMPX5 days
Oct 2, 3:14 AM CDTFrost AdvisoryMPX30 hr
Oct 2, 3:15 PM CDTFreeze WarningMPX18 hr
Oct 24, 3:57 PM CDTHigh Wind WatchMPX24 hr
Oct 25, 3:58 PM CDTHigh Wind WarningMPX47 hr
Nov 11, 3:42 PM CSTWinter Storm WatchMPX24 hr
Nov 12, 3:40 PM CSTWinter Storm WarningMPX29 hr
Nov 12, 3:40 PM CSTWinter Weather AdvisoryMPX36 hr
Nov 13, 2:28 AM CSTMesoscale DiscussionSPC5 hr
Nov 20, 3:04 PM CSTFreezing Rain AdvisoryMPX24 hr
Nov 22, 2:32 AM CSTMesoscale DiscussionSPC6 hr
Nov 23, 3:23 PM CSTWinter Weather AdvisoryMPX32 hr
Nov 29, 4:46 AM CSTWinter Weather AdvisoryMPX40 hr
Dec 2, 3:20 AM CSTWinter Storm WatchMPX12 hr
Dec 2, 3:17 PM CSTWinter Storm WarningMPX39 hr
Dec 9, 3:00 PM CSTWinter Storm WatchMPX14 hr
Dec 10, 5:02 AM CSTWinter Storm WarningMPX49 hr
Dec 10, 6:19 PM CSTMesoscale DiscussionSPC5 hr
Dec 11, 1:47 AM CSTMesoscale DiscussionSPC6 hr
Dec 11, 9:56 AM CSTMesoscale DiscussionSPC5 hr
Dec 11, 4:13 PM CSTWind Chill AdvisoryMPX20 hr
Dec 12, 3:59 PM CSTWind Chill AdvisoryMPX17 hr
Dec 15, 3:29 AM CSTWinter Weather AdvisoryMPX36 hr
Dec 19, 3:28 AM CSTWinter Storm WatchMPX11 hr
Dec 19, 2:12 PM CSTWinter Storm WarningMPX38 hr
Dec 21, 3:49 AM CSTWinter Weather AdvisoryMPX12 hr
Dec 29, 11:33 AM CSTDense Fog AdvisoryMPX15 hr
Dec 30, 2:53 PM CSTWinter Weather AdvisoryMPX45 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 archive20092011

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.