Alert archive / Minnesota / Grant County
Weather alerts in Grant County, Minnesota, 2010
129 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Grant County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 129
- Warnings
- 34
- Watches
- 30
- Advisories
- 40
- Busiest month
- July24 alerts
- Busiest day
- July 10, 20106 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 8 tornado warnings covering Grant County in 2010 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 39 minutes after it went out.
Grant County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 8 | 3 | 63% | 2 | 100% | 39 min |
| Severe thunderstorm warnings | 8 | 4 | 50% | 5 | 20% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Forks, ND: tornado warnings | 116 | 44 | 62% | 112 | 89% | 25 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 168 | 101 | 40% | 212 | 62% | 22 min |
| NWS Grand Forks, ND: flash flood warnings | 29 | 23 | 21% | 39 | 87% | 113 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 5, 4:07 AM CST | Winter Weather Advisory | FGF | 56 hr |
| Jan 6, 3:39 PM CST | Wind Chill Advisory | FGF | 44 hr |
| Jan 7, 4:35 AM CST | Wind Chill Warning | FGF | 31 hr |
| Jan 8, 3:22 PM CST | Wind Chill Advisory | FGF | 23 hr |
| Jan 18, 7:19 AM CST | Dense Fog Advisory | FGF | 5 hr |
| Jan 18, 12:26 PM CST | Dense Fog Advisory | FGF | 3 hr |
| Jan 18, 3:07 PM CST | Dense Fog Advisory | FGF | 19 hr |
| Jan 20, 2:41 PM CST | Winter Storm Watch | FGF | 45 hr |
| Jan 22, 4:43 AM CST | Winter Storm Warning | FGF | 3 days |
| Jan 23, 9:49 AM CST | Winter Weather Advisory | FGF | 66 hr |
| Jan 25, 4:19 AM CST | Blizzard Warning | FGF | 17 hr |
| Jan 27, 3:06 PM CST | Wind Chill Advisory | FGF | 21 hr |
| Jan 30, 3:24 PM CST | Wind Chill Advisory | FGF | 6 hr |
| Feb 4, 3:38 AM CST | Winter Weather Advisory | FGF | 50 hr |
| Feb 5, 3:21 PM CST | Winter Storm Watch | FGF | 25 hr |
| Feb 6, 3:52 PM CST | Winter Storm Warning | FGF | 47 hr |
| Feb 6, 3:52 PM CST | Winter Weather Advisory | FGF | 50 hr |
| Feb 12, 3:22 PM CST | Winter Weather Advisory | FGF | 48 hr |
| Mar 11, 3:25 AM CST | Dense Fog Advisory | FGF | 8 hr |
| Mar 13, 3:53 AM CST | Dense Fog Advisory | FGF | 6 hr |
| Mar 13, 7:14 PM CST | Dense Fog Advisory | FGF | 14 hr |
| Apr 10, 4:25 AM CDT | Red Flag Warning | FGF | 17 hr |
| Apr 12, 10:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 1:50 AM CDT | Wind Advisory | FGF | 20 hr |
| Apr 16, 4:30 AM CDT | Red Flag Warning | FGF | 16 hr |
| Apr 27, 3:18 PM CDT | Wind Advisory | FGF | 30 hr |
| Apr 27, 3:47 PM CDT | Red Flag Warning | FGF | 28 hr |
| Apr 29, 11:25 PM CDT | Dense Fog Advisory | FGF | 10 hr |
| May 5, 4:31 AM CDT | Wind Advisory | FGF | 8 hr |
| May 8, 3:56 AM CDT | Freeze Warning | FGF | 28 hr |
| May 22, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 12:16 AM CDT | Severe Thunderstorm Warning | FGF | 59 min |
| May 23, 1:13 AM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| May 23, 1:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| May 24, 1:37 AM CDT | Mesoscale Discussion | SPC | 83 min |
| May 24, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 24, 4:21 AM CDT | Mesoscale Discussion | SPC | 54 min |
| May 24, 6:12 PM CDT | Wind Advisory | FGF | 4 hr |
| May 24, 9:32 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 16, 6:55 PM CDT | High Wind Watch | FGF | 16 hr |
| Jun 17, 7:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 17, 12:21 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 17, 11:06 PM CDT | Wind Advisory | FGF | 20 hr |
| Jun 21, 4:31 AM CDT | Flash Flood Watch | FGF | 26 hr |
| Jun 25, 6:27 AM CDT | Severe Thunderstorm Warning | FGF | 63 min |
| Jul 3, 5:20 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 3, 8:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 3, 11:48 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 10, 4:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 10, 4:47 PM CDT | Tornado Warning | FGF | 58 min |
| Jul 10, 4:48 PM CDT | Tornado Watch | SPC | 3 hr |
| Jul 10, 4:56 PM CDT | Tornado Warning | FGF | 64 min |
| Jul 10, 5:46 PM CDT | Tornado Warning | FGF | 59 min |
| Jul 10, 6:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 13, 1:50 PM CDT | Tornado Watch | SPC | 9 hr |
| Jul 14, 3:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 14, 3:50 AM CDT | Tornado Watch | SPC | 5 hr |
| Jul 14, 6:12 AM CDT | Severe Thunderstorm Warning | FGF | 63 min |
| Jul 17, 11:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 17, 12:28 PM CDT | Tornado Watch | SPC | 11 hr |
| Jul 17, 5:28 PM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Jul 17, 5:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 22, 6:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 22, 6:40 PM CDT | Tornado Warning | FGF | 50 min |
| Jul 27, 1:24 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 6:29 AM CDT | Severe Thunderstorm Warning | FGF | 61 min |
| Jul 27, 1:43 PM CDT | Mesoscale Discussion | SPC | 32 min |
| Jul 27, 3:29 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 27, 4:02 PM CDT | Tornado Warning | FGF | 48 min |
| Aug 1, 1:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 2:57 PM CDT | Tornado Watch | SPC | 7 hr |
| Aug 1, 6:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 3:19 AM CDT | Dense Fog Advisory | FGF | 4 hr |
| Aug 7, 4:13 AM CDT | Flash Flood Watch | FGF | 20 hr |
| Aug 7, 3:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 5:27 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 7, 6:03 PM CDT | Tornado Warning | FGF | 57 min |
| Aug 7, 6:58 PM CDT | Tornado Warning | FGF | 62 min |
| Aug 7, 7:57 PM CDT | Tornado Warning | FGF | 23 min |
| Aug 7, 8:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 12, 2:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 12, 3:22 PM CDT | Tornado Watch | SPC | 7 hr |
| Aug 12, 5:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Aug 12, 10:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 18, 9:37 AM CDT | Severe Thunderstorm Warning | FGF | 38 min |
| Aug 18, 10:01 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 18, 11:09 AM CDT | Severe Thunderstorm Warning | FGF | 36 min |
| Aug 19, 10:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 21, 3:31 AM CDT | Dense Fog Advisory | FGF | 4 hr |
| Aug 21, 8:39 AM CDT | Dense Fog Advisory | FGF | 2 hr |
| Aug 21, 9:14 PM CDT | Wind Advisory | FGF | 24 hr |
| Aug 30, 3:53 PM CDT | Tornado Watch | SPC | 6 hr |
| Sep 6, 2:34 PM CDT | Wind Advisory | FGF | 13 hr |
| Sep 22, 3:15 PM CDT | Flood Watch | FGF | 5 hr |
| Sep 22, 8:28 PM CDT | Flood Watch | FGF | 17 hr |
| Oct 1, 2:43 PM CDT | Frost Advisory | FGF | 18 hr |
| Oct 2, 3:02 PM CDT | Frost Advisory | FGF | 18 hr |
| Oct 20, 4:22 AM CDT | Wind Advisory | FGF | 14 hr |
| Oct 25, 10:18 AM CDT | High Wind Watch | FGF | 18 hr |
| Oct 25, 2:58 PM CDT | High Wind Warning | FGF | 43 hr |
| Oct 25, 3:10 PM CDT | Winter Storm Watch | FGF | 23 hr |
| Oct 26, 2:35 PM CDT | Winter Storm Warning | FGF | 24 hr |
| Oct 27, 2:31 PM CDT | Wind Advisory | FGF | 10 hr |
| Nov 20, 4:15 AM CST | Winter Weather Advisory | FGF | 35 hr |
| Nov 21, 3:19 PM CST | Winter Weather Advisory | FGF | 32 hr |
| Nov 22, 4:17 AM CST | Winter Storm Watch | FGF | 35 hr |
| Nov 23, 3:15 PM CST | Winter Weather Advisory | FGF | 44 hr |
| Nov 28, 3:08 PM CST | Winter Storm Watch | FGF | 14 hr |
| Nov 29, 4:39 AM CST | Winter Storm Warning | FGF | 31 hr |
| Nov 29, 4:39 AM CST | Winter Weather Advisory | FGF | 40 hr |
| Dec 2, 4:20 AM CST | Winter Storm Watch | FGF | 11 hr |
| Dec 2, 3:24 PM CST | Winter Weather Advisory | FGF | 37 hr |
| Dec 3, 11:28 AM CST | Winter Storm Warning | FGF | 12 hr |
| Dec 10, 4:17 AM CST | Winter Weather Advisory | FGF | 29 hr |
| Dec 10, 4:09 PM CST | Winter Storm Warning | FGF | 12 hr |
| Dec 11, 3:18 PM CST | Wind Chill Advisory | FGF | 13 hr |
| Dec 14, 3:13 PM CST | Winter Weather Advisory | FGF | 42 hr |
| Dec 19, 4:13 AM CST | Winter Storm Watch | FGF | 24 hr |
| Dec 19, 2:46 PM CST | Winter Storm Warning | FGF | 39 hr |
| Dec 23, 4:32 AM CST | Winter Weather Advisory | FGF | 23 hr |
| Dec 28, 5:19 AM CST | Winter Storm Watch | FGF | 35 hr |
| Dec 29, 3:50 PM CST | Winter Storm Watch | FGF | 37 hr |
| Dec 29, 3:50 PM CST | Winter Storm Warning | FGF | 36 hr |
| Dec 29, 3:50 PM CST | Winter Weather Advisory | FGF | 50 hr |
| Dec 30, 11:35 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 30, 12:16 PM CST | Blizzard Warning | FGF | 16 hr |
| Dec 30, 5:43 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 31, 4:20 AM CST | Blizzard Warning | FGF | 32 hr |
| Dec 31, 4:20 AM CST | Winter Storm Warning | FGF | 32 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 | 8 |
| Tornado Warning | 8 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 10 |
| Mesoscale Discussion | 25 |
| Flooding | |
| Flash Flood Watch | 2 |
| Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 9 |
| Winter Storm Watch | 9 |
| Winter Weather Advisory | 14 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 9 |
| Fire | |
| Red Flag Warning | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
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.