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
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 0% | |
| Severe thunderstorm warnings | 19 | 8 | 58% | 11 | 64% | 43 min |
| Flash flood warnings | 4 | 4 | 0% | 1 | 0% |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 97 | 33 | 66% | 103 | 68% | 19 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 269 | 149 | 45% | 542 | 68% | 26 min |
| NWS Twin Cities, MN: flash flood warnings | 25 | 15 | 40% | 86 | 60% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 2:22 PM CST | Wind Chill Advisory | MPX | 19 hr |
| Jan 7, 1:57 PM CST | Wind Chill Advisory | MPX | 34 hr |
| Jan 18, 3:44 PM CST | Dense Fog Advisory | MPX | 23 hr |
| Jan 21, 6:25 PM CST | Winter Weather Advisory | MPX | 6 hr |
| Jan 22, 11:50 AM CST | Winter Weather Advisory | MPX | 28 hr |
| Feb 4, 2:10 PM CST | Winter Weather Advisory | MPX | 25 hr |
| Feb 7, 3:15 PM CST | Winter Weather Advisory | MPX | 51 hr |
| Feb 12, 3:55 PM CST | Dense Fog Advisory | MPX | 20 hr |
| Feb 13, 9:50 AM CST | Winter Weather Advisory | MPX | 50 hr |
| Mar 7, 2:55 PM CST | Dense Fog Advisory | MPX | 18 hr |
| Mar 9, 4:10 PM CST | Dense Fog Advisory | MPX | 41 hr |
| Mar 11, 2:41 PM CST | Dense Fog Advisory | MPX | 21 hr |
| Mar 13, 2:59 PM CST | River Flood Watch | MPX | 6 days |
| Mar 13, 3:54 PM CST | River Flood Watch | MPX | 21 hr |
| Mar 14, 2:00 PM CDT | River Flood Warning | MPX | 18 days |
| Mar 14, 2:00 PM CDT | River Flood Warning | MPX | 18 days |
| Mar 18, 11:44 AM CDT | River Flood Warning | MPX | 6 days |
| Mar 22, 5:15 PM CDT | Areal Flood Warning | MPX | 11 days |
| May 1, 2:35 AM CDT | Wind Advisory | MPX | 16 hr |
| May 4, 2:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 8, 3:48 AM CDT | Freeze Warning | MPX | 29 hr |
| Jun 15, 2:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 17, 1:54 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 17, 7:12 PM CDT | Special Weather Statement | MPX | 2 hr |
| Jun 17, 7:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 22, 4:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 22, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 22, 11:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 23, 1:49 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 23, 2:36 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 23, 2:58 AM CDT | Special Weather Statement | MPX | 77 min |
| Jun 25, 3:35 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 25, 5:51 PM CDT | Severe Thunderstorm Warning | MPX | 54 min |
| Jun 25, 5:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 6:24 PM CDT | Flash Flood Warning | MPX | 3 hr |
| Jun 25, 7:09 PM CDT | Severe Thunderstorm Warning | MPX | 36 min |
| Jun 26, 4:34 AM CDT | Flash Flood Watch | MPX | 22 hr |
| Jun 26, 9:53 PM CDT | Severe Thunderstorm Warning | MPX | 82 min |
| Jun 26, 10:14 PM CDT | Areal Flood Advisory | MPX | 4 hr |
| Jun 26, 10:57 PM CDT | Flash Flood Warning | MPX | 3 hr |
| Jun 27, 12:31 AM CDT | Special Weather Statement | MPX | 59 min |
| Jul 5, 11:49 AM CDT | Special Weather Statement | MPX | 41 min |
| Jul 5, 8:56 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 7, 5:20 PM CDT | Special Weather Statement | MPX | 85 min |
| Jul 10, 11:41 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 11, 4:25 PM CDT | Severe Thunderstorm Warning | MPX | 39 min |
| Jul 14, 3:12 AM CDT | Heat Advisory | MPX | 15 hr |
| Jul 14, 8:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 14, 9:00 AM CDT | Tornado Watch | SPC | 9 hr |
| Jul 14, 12:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 14, 2:33 PM CDT | Severe Thunderstorm Warning | MPX | 44 min |
| Jul 14, 4:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 17, 11:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 17, 12:28 PM CDT | Tornado Watch | SPC | 11 hr |
| Jul 17, 5:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 17, 8:00 PM CDT | Severe Thunderstorm Warning | MPX | 60 min |
| Jul 17, 8:10 PM CDT | Tornado Warning | MPX | 35 min |
| Jul 17, 8:21 PM CDT | Severe Thunderstorm Warning | MPX | 54 min |
| Jul 17, 8:34 PM CDT | Tornado Warning | MPX | 26 min |
| Jul 17, 8:51 PM CDT | Tornado Warning | MPX | 24 min |
| Jul 17, 9:08 PM CDT | Areal Flood Advisory | MPX | 6 hr |
| Jul 17, 9:53 PM CDT | Severe Thunderstorm Warning | MPX | 23 min |
| Jul 20, 2:15 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 27, 3:54 AM CDT | Heat Advisory | MPX | 15 hr |
| Jul 27, 1:43 PM CDT | Mesoscale Discussion | SPC | 32 min |
| Jul 27, 3:29 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 27, 6:51 PM CDT | Special Weather Statement | MPX | 54 min |
| Jul 27, 7:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 4, 8:32 PM CDT | Severe Thunderstorm Warning | MPX | 26 min |
| Aug 7, 5:27 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 7, 8:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 7, 10:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 11:59 PM CDT | Tornado Watch | SPC | 4 hr |
| Aug 8, 12:45 AM CDT | Special Weather Statement | MPX | 90 min |
| Aug 8, 12:47 AM CDT | Severe Thunderstorm Warning | MPX | 43 min |
| Aug 8, 1:43 AM CDT | Severe Thunderstorm Warning | MPX | 32 min |
| Aug 8, 2:25 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Aug 8, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 8, 6:37 PM CDT | Severe Thunderstorm Warning | MPX | 53 min |
| Aug 9, 4:22 AM CDT | Heat Advisory | MPX | 16 hr |
| Aug 10, 9:38 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Aug 10, 1:46 PM CDT | Tornado Watch | SPC | 6 hr |
| Aug 10, 4:13 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Aug 10, 9:29 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Aug 10, 10:54 PM CDT | Flash Flood Warning | MPX | 3 hr |
| Aug 12, 10:03 AM CDT | Heat Advisory | MPX | 9 hr |
| Aug 12, 4:37 PM CDT | Flash Flood Watch | MPX | 29 hr |
| Aug 12, 5:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Aug 12, 6:41 PM CDT | Tornado Watch | SPC | 4 hr |
| Aug 12, 8:29 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Aug 13, 12:44 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Aug 13, 12:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 13, 1:19 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 13, 1:50 AM CDT | Special Weather Statement | MPX | 70 min |
| Aug 13, 2:09 AM CDT | Flash Flood Warning | MPX | 3 hr |
| Aug 13, 3:41 AM CDT | Severe Thunderstorm Warning | MPX | 64 min |
| Aug 13, 4:11 AM CDT | Severe Thunderstorm Warning | MPX | 64 min |
| Aug 13, 4:26 AM CDT | Severe Thunderstorm Warning | MPX | 64 min |
| Aug 13, 4:38 AM CDT | Severe Thunderstorm Warning | MPX | 67 min |
| Aug 13, 5:27 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 13, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 13, 5:36 PM CDT | Severe Thunderstorm Warning | MPX | 54 min |
| Aug 13, 7:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 14, 2:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 18, 10:01 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 18, 2:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 21, 8:48 PM CDT | Dense Fog Advisory | MPX | 12 hr |
| Sep 21, 1:37 AM CDT | Severe Thunderstorm Warning | MPX | 23 min |
| Sep 21, 2:01 AM CDT | Severe Thunderstorm Warning | MPX | 29 min |
| Sep 21, 2:04 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 22, 4:00 AM CDT | Flood Watch | MPX | 46 hr |
| Sep 22, 8:50 PM CDT | River Flood Watch | MPX | 36 hr |
| Sep 22, 8:50 PM CDT | River Flood Watch | MPX | 36 hr |
| Sep 23, 9:05 PM CDT | River Flood Warning | MPX | 14 days |
| Sep 23, 9:05 PM CDT | River Flood Warning | MPX | 13 days |
| Sep 24, 4:24 AM CDT | Wind Advisory | MPX | 9 hr |
| Sep 29, 4:18 PM CDT | Areal Flood Warning | MPX | 5 days |
| Oct 2, 3:14 AM CDT | Frost Advisory | MPX | 30 hr |
| Oct 2, 3:15 PM CDT | Freeze Warning | MPX | 18 hr |
| Oct 24, 3:57 PM CDT | High Wind Watch | MPX | 24 hr |
| Oct 25, 3:58 PM CDT | High Wind Warning | MPX | 47 hr |
| Nov 11, 3:42 PM CST | Winter Storm Watch | MPX | 24 hr |
| Nov 12, 3:40 PM CST | Winter Storm Warning | MPX | 29 hr |
| Nov 12, 3:40 PM CST | Winter Weather Advisory | MPX | 36 hr |
| Nov 13, 2:28 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Nov 20, 3:04 PM CST | Freezing Rain Advisory | MPX | 24 hr |
| Nov 22, 2:32 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 23, 3:23 PM CST | Winter Weather Advisory | MPX | 32 hr |
| Nov 29, 4:46 AM CST | Winter Weather Advisory | MPX | 40 hr |
| Dec 2, 3:20 AM CST | Winter Storm Watch | MPX | 12 hr |
| Dec 2, 3:17 PM CST | Winter Storm Warning | MPX | 39 hr |
| Dec 9, 3:00 PM CST | Winter Storm Watch | MPX | 14 hr |
| Dec 10, 5:02 AM CST | Winter Storm Warning | MPX | 49 hr |
| Dec 10, 6:19 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 1:47 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 11, 9:56 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 4:13 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Dec 12, 3:59 PM CST | Wind Chill Advisory | MPX | 17 hr |
| Dec 15, 3:29 AM CST | Winter Weather Advisory | MPX | 36 hr |
| Dec 19, 3:28 AM CST | Winter Storm Watch | MPX | 11 hr |
| Dec 19, 2:12 PM CST | Winter Storm Warning | MPX | 38 hr |
| Dec 21, 3:49 AM CST | Winter Weather Advisory | MPX | 12 hr |
| Dec 29, 11:33 AM CST | Dense Fog Advisory | MPX | 15 hr |
| Dec 30, 2:53 PM CST | Winter Weather Advisory | MPX | 45 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.