Alert archive / Minnesota / Washington County
Weather alerts in Washington County, Minnesota, 2008
106 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 106
- Warnings
- 29
- Watches
- 20
- Advisories
- 34
- Busiest month
- June21 alerts
- Busiest day
- May 25, 20089 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 7 tornado warnings covering Washington County in 2008 had a tornado report inside them; 3 of 4 tornado reports fell inside a warning, on average 5 minutes after it went out.
Washington County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 7 | 1 | 86% | 4 | 75% | 5 min |
| Severe thunderstorm warnings | 16 | 12 | 25% | 14 | 86% | 27 min |
| Flash flood warnings | 0 | 1 | 0% |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 46 | 10 | 78% | 31 | 65% | 11 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 293 | 114 | 61% | 430 | 83% | 26 min |
| NWS Twin Cities, MN: flash flood warnings | 3 | 1 | 67% | 4 | 50% | 68 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 7, 3:16 PM CST | Dense Fog Advisory | MPX | 18 hr |
| Jan 17, 3:25 PM CST | Wind Chill Advisory | MPX | 51 hr |
| Jan 23, 2:45 PM CST | Wind Chill Advisory | MPX | 18 hr |
| Jan 28, 2:59 PM CST | Winter Weather Advisory | MPX | 27 hr |
| Jan 29, 3:37 AM CST | Wind Chill Advisory | MPX | 16 hr |
| Jan 29, 2:51 PM CST | Wind Chill Warning | MPX | 21 hr |
| Feb 3, 3:39 PM CST | Snow Advisory | MPX | 28 hr |
| Feb 3, 3:39 PM CST | Winter Weather Advisory | MPX | 21 hr |
| Feb 8, 2:27 PM CST | Wind Chill Watch | MPX | 13 hr |
| Feb 8, 2:27 PM CST | Winter Weather Advisory | MPX | 34 hr |
| Feb 9, 3:50 AM CST | Wind Chill Warning | MPX | 32 hr |
| Feb 10, 10:52 AM CST | Wind Chill Advisory | MPX | 7 hr |
| Feb 13, 4:32 AM CST | Snow Advisory | MPX | 25 hr |
| Feb 19, 3:59 AM CST | Wind Chill Advisory | MPX | 32 hr |
| Feb 24, 3:08 PM CST | Dense Fog Advisory | MPX | 18 hr |
| Mar 2, 4:35 PM CST | Winter Weather Advisory | MPX | 7 hr |
| Mar 17, 11:58 AM CDT | Snow Advisory | MPX | 9 hr |
| Mar 20, 1:01 PM CDT | Snow Advisory | MPX | 30 hr |
| Mar 30, 3:37 AM CDT | Winter Storm Watch | MPX | 11 hr |
| Mar 30, 3:04 PM CDT | Heavy Snow Warning | MPX | 39 hr |
| Mar 31, 9:48 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 9, 12:46 PM CDT | Winter Storm Watch | MPX | 16 hr |
| Apr 9, 4:02 PM CDT | Winter Storm Warning | MPX | 57 hr |
| Apr 10, 4:36 AM CDT | Winter Weather Advisory | MPX | 35 hr |
| Apr 14, 3:54 PM CDT | Wind Advisory | MPX | 30 hr |
| May 25, 12:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 25, 2:04 PM CDT | Tornado Watch | SPC | 6 hr |
| May 25, 4:13 PM CDT | Severe Thunderstorm Warning | MPX | 62 min |
| May 25, 4:37 PM CDT | Tornado Warning | MPX | 23 min |
| May 25, 4:56 PM CDT | Tornado Warning | MPX | 34 min |
| May 25, 5:17 PM CDT | Severe Thunderstorm Warning | MPX | 43 min |
| May 25, 5:25 PM CDT | Severe Thunderstorm Warning | MPX | 35 min |
| May 25, 6:00 PM CDT | Severe Thunderstorm Warning | MPX | 30 min |
| May 25, 6:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 31, 2:51 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 31, 6:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 31, 6:45 PM CDT | Severe Thunderstorm Warning | MPX | 45 min |
| May 31, 6:55 PM CDT | Tornado Warning | MPX | 50 min |
| May 31, 7:18 PM CDT | Tornado Warning | MPX | 30 min |
| May 31, 7:23 PM CDT | Tornado Warning | MPX | 32 min |
| May 31, 7:40 PM CDT | Severe Thunderstorm Warning | MPX | 47 min |
| Jun 5, 11:36 AM CDT | Flash Flood Watch | MPX | 17 hr |
| Jun 5, 2:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 5, 4:01 PM CDT | Severe Thunderstorm Warning | MPX | 29 min |
| Jun 5, 9:14 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 6, 2:41 AM CDT | Wind Advisory | MPX | 15 hr |
| Jun 10, 3:25 PM CDT | Flash Flood Watch | MPX | 42 hr |
| Jun 11, 4:26 PM CDT | Areal Flood Advisory | MPX | 4 hr |
| Jun 11, 8:39 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 11, 9:15 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jun 11, 9:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 14, 6:54 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 14, 9:40 PM CDT | Severe Thunderstorm Warning | MPX | 50 min |
| Jun 14, 9:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 14, 11:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 20, 2:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 27, 12:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 1:09 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 10, 9:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 10, 12:06 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 10, 12:46 PM CDT | Severe Thunderstorm Warning | MPX | 44 min |
| Jul 10, 12:56 PM CDT | Severe Thunderstorm Warning | MPX | 49 min |
| Jul 10, 11:41 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 11, 2:15 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 11, 6:13 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 7:56 PM CDT | Severe Thunderstorm Warning | MPX | 64 min |
| Jul 11, 8:46 PM CDT | Tornado Warning | MPX | 20 min |
| Jul 16, 9:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 9:57 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 16, 10:47 AM CDT | Severe Thunderstorm Warning | MPX | 58 min |
| Jul 16, 1:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 10:57 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 2:28 PM CDT | Tornado Watch | SPC | 8 hr |
| Jul 19, 3:07 PM CDT | Tornado Warning | MPX | 38 min |
| Jul 25, 3:14 PM CDT | Severe Thunderstorm Warning | MPX | 31 min |
| Jul 25, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 25, 3:51 PM CDT | Severe Thunderstorm Warning | MPX | 54 min |
| Jul 25, 5:35 PM CDT | Severe Thunderstorm Warning | MPX | 25 min |
| Jul 31, 4:51 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 3, 2:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 8:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 10:21 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 4, 1:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 6, 2:30 PM CDT | Severe Thunderstorm Warning | MPX | 45 min |
| Aug 13, 3:37 AM CDT | Dense Fog Advisory | MPX | 5 hr |
| Aug 27, 4:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 28, 2:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 23, 1:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 3, 3:24 PM CDT | Frost Advisory | MPX | 17 hr |
| Oct 25, 3:32 PM CDT | Wind Advisory | MPX | 28 hr |
| Nov 10, 8:56 PM CST | Winter Weather Advisory | MPX | 21 hr |
| Dec 8, 5:01 AM CST | Winter Weather Advisory | MPX | 28 hr |
| Dec 13, 4:36 PM CST | Winter Weather Advisory | MPX | 37 hr |
| Dec 14, 5:44 AM CST | Wind Chill Advisory | MPX | 42 hr |
| Dec 18, 3:24 AM CST | Winter Weather Advisory | MPX | 30 hr |
| Dec 18, 3:43 PM CST | Winter Storm Watch | MPX | 36 hr |
| Dec 20, 3:55 AM CST | Winter Storm Warning | MPX | 38 hr |
| Dec 20, 8:48 PM CST | Winter Weather Advisory | MPX | 21 hr |
| Dec 21, 3:15 PM CST | Wind Chill Advisory | MPX | 18 hr |
| Dec 22, 3:42 AM CST | Winter Weather Advisory | MPX | 32 hr |
| Dec 25, 3:36 PM CST | Winter Weather Advisory | MPX | 20 hr |
| Dec 26, 12:32 PM CST | Dense Fog Advisory | MPX | 14 hr |
| Dec 29, 7:51 AM CST | Winter Weather Advisory | MPX | 34 hr |
| Dec 30, 2:17 AM CST | Winter Storm Warning | MPX | 16 hr |
| Dec 30, 6:11 AM CST | Mesoscale Discussion | SPC | 3 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 16 |
| Tornado Warning | 7 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 23 |
| Flooding | |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 2 |
| Winter | |
| Heavy Snow Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Snow Advisory | 4 |
| Winter Weather Advisory | 13 |
| Cold | |
| Wind Chill Warning | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 7 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.