Alert archive / North Dakota / Cavalier County
Weather alerts in Cavalier County, North Dakota, 2008
117 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cavalier County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 117
- Warnings
- 33
- Watches
- 18
- Advisories
- 53
- Busiest month
- July23 alerts
- Busiest day
- July 7, 20085 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 5 tornado warnings covering Cavalier County in 2008 had a tornado report inside them.
Cavalier County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 2 | 60% | 0 | ||
| Severe thunderstorm warnings | 10 | 3 | 70% | 4 | 50% | 30 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Forks, ND: tornado warnings | 58 | 26 | 55% | 53 | 75% | 21 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 217 | 91 | 58% | 196 | 76% | 26 min |
| NWS Grand Forks, ND: flash flood warnings | 9 | 7 | 22% | 17 | 82% | 112 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 2, 10:40 PM CST | Wind Advisory | FGF | 7 hr |
| Jan 5, 9:20 PM CST | Freezing Rain Advisory | FGF | 6 hr |
| Jan 10, 3:22 AM CST | Dense Fog Advisory | FGF | 6 hr |
| Jan 14, 9:46 PM CST | Wind Chill Advisory | FGF | 10 hr |
| Jan 16, 1:04 AM CST | Winter Weather Advisory | FGF | 11 hr |
| Jan 17, 3:46 AM CST | Wind Chill Advisory | FGF | 56 hr |
| Jan 17, 3:46 AM CST | Winter Weather Advisory | FGF | 12 hr |
| Jan 17, 3:18 PM CST | Wind Chill Warning | FGF | 21 hr |
| Jan 22, 3:51 PM CST | Wind Chill Advisory | FGF | 11 hr |
| Jan 27, 2:54 PM CST | Winter Storm Watch | FGF | 24 hr |
| Jan 28, 4:19 AM CST | Winter Weather Advisory | FGF | 35 hr |
| Jan 28, 3:20 PM CST | Wind Chill Warning | FGF | 45 hr |
| Jan 30, 11:54 AM CST | Wind Chill Advisory | FGF | 8 hr |
| Feb 4, 6:54 AM CST | Snow Advisory | FGF | 11 hr |
| Feb 7, 3:47 AM CST | Blizzard Watch | FGF | 42 hr |
| Feb 8, 3:37 PM CST | Blizzard Warning | FGF | 26 hr |
| Feb 9, 3:12 PM CST | Wind Chill Warning | FGF | 21 hr |
| Feb 10, 3:41 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Feb 13, 3:58 AM CST | Winter Weather Advisory | FGF | 24 hr |
| Feb 13, 3:24 PM CST | Wind Chill Advisory | FGF | 21 hr |
| Feb 13, 4:09 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 16, 3:41 AM CST | Winter Weather Advisory | FGF | 30 min |
| Feb 16, 4:11 AM CST | Winter Weather Advisory | FGF | 17 hr |
| Feb 17, 9:47 AM CST | Snow and Blowing Snow Advisory | FGF | 10 hr |
| Feb 17, 7:40 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 19, 3:56 AM CST | Wind Chill Advisory | FGF | 6 hr |
| Feb 19, 10:13 AM CST | Wind Chill Warning | FGF | 18 hr |
| Feb 20, 3:26 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Mar 2, 4:13 AM CST | Wind Advisory | FGF | 5 hr |
| Mar 2, 9:16 AM CST | Winter Weather Advisory | FGF | 12 hr |
| Mar 4, 3:56 AM CST | Winter Weather Advisory | FGF | 15 hr |
| Mar 29, 11:12 PM CDT | Wind Advisory | FGF | 11 hr |
| Apr 13, 1:37 PM CDT | Fire Weather Watch | FGF | 19 hr |
| Apr 14, 5:00 AM CDT | Red Flag Warning | FGF | 16 hr |
| Apr 14, 10:30 AM CDT | Wind Advisory | FGF | 11 hr |
| Apr 20, 3:39 AM CDT | Wind Advisory | FGF | 18 hr |
| Apr 21, 9:17 AM CDT | Freezing Rain Advisory | FGF | 3 hr |
| Apr 26, 11:36 AM CDT | Wind Advisory | FGF | 7 hr |
| May 2, 12:17 PM CDT | Red Flag Warning | FGF | 9 hr |
| May 4, 4:32 AM CDT | Red Flag Warning | FGF | 16 hr |
| May 16, 4:12 AM CDT | Red Flag Warning | FGF | 17 hr |
| May 16, 4:19 AM CDT | Wind Advisory | FGF | 17 hr |
| May 16, 3:54 PM CDT | Fire Weather Watch | FGF | 12 hr |
| May 17, 3:44 AM CDT | Wind Advisory | FGF | 17 hr |
| May 17, 3:54 AM CDT | Red Flag Warning | FGF | 17 hr |
| May 17, 2:56 PM CDT | Frost Advisory | FGF | 17 hr |
| May 20, 3:04 PM CDT | Freeze Warning | FGF | 16 hr |
| May 24, 4:09 AM CDT | Wind Advisory | FGF | 15 hr |
| May 24, 8:07 PM CDT | Tornado Watch | SPC | 3 hr |
| May 24, 9:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 3:12 PM CDT | Freeze Warning | FGF | 16 hr |
| Jun 4, 4:00 AM CDT | Dense Fog Advisory | FGF | 6 hr |
| Jun 11, 11:24 AM CDT | Wind Advisory | FGF | 8 hr |
| Jun 11, 7:10 PM CDT | Wind Advisory | FGF | 110 min |
| Jun 12, 2:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 14, 5:53 PM CDT | Severe Thunderstorm Warning | FGF | 67 min |
| Jun 21, 8:02 PM CDT | Severe Thunderstorm Warning | FGF | 58 min |
| Jun 23, 8:00 PM CDT | Severe Thunderstorm Warning | FGF | 60 min |
| Jun 23, 8:58 PM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Jun 26, 6:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 28, 3:57 AM CDT | Wind Advisory | FGF | 16 hr |
| Jul 1, 3:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 5, 3:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 5, 5:08 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 5, 7:11 PM CDT | Severe Thunderstorm Warning | FGF | 36 min |
| Jul 5, 8:15 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 7, 2:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 7, 3:26 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 7, 4:10 PM CDT | Tornado Warning | FGF | 65 min |
| Jul 7, 5:13 PM CDT | Tornado Warning | FGF | 62 min |
| Jul 7, 5:30 PM CDT | Tornado Watch | SPC | 3 hr |
| Jul 10, 11:19 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 11, 3:58 AM CDT | Wind Advisory | FGF | 17 hr |
| Jul 11, 4:11 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 11, 6:36 AM CDT | Mesoscale Discussion | SPC | 24 min |
| Jul 12, 4:20 AM CDT | Wind Advisory | FGF | 18 hr |
| Jul 16, 7:07 PM CDT | Tornado Warning | FGF | 38 min |
| Jul 16, 7:16 PM CDT | Severe Thunderstorm Warning | FGF | 59 min |
| Jul 16, 7:28 PM CDT | Tornado Warning | FGF | 47 min |
| Jul 16, 8:07 PM CDT | Tornado Warning | FGF | 19 min |
| Jul 28, 9:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 28, 11:31 PM CDT | Severe Thunderstorm Warning | FGF | 59 min |
| Jul 30, 9:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 30, 10:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 3:29 AM CDT | Flash Flood Watch | FGF | 18 hr |
| Aug 21, 3:48 AM CDT | Wind Advisory | FGF | 17 hr |
| Aug 21, 10:03 PM CDT | Severe Thunderstorm Warning | FGF | 57 min |
| Aug 21, 10:57 PM CDT | Severe Thunderstorm Warning | FGF | 46 min |
| Aug 22, 3:05 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 22, 3:25 AM CDT | Wind Advisory | FGF | 20 hr |
| Aug 26, 4:12 AM CDT | Wind Advisory | FGF | 16 hr |
| Sep 22, 2:36 PM CDT | Flash Flood Watch | FGF | 14 hr |
| Sep 22, 7:35 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 22, 10:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Sep 23, 1:37 AM CDT | Mesoscale Discussion | SPC | 23 min |
| Sep 23, 5:04 PM CDT | Severe Thunderstorm Warning | FGF | 26 min |
| Sep 29, 8:44 PM CDT | Frost Advisory | FGF | 10 hr |
| Oct 8, 4:01 AM CDT | Wind Advisory | FGF | 15 hr |
| Oct 13, 3:20 PM CDT | Freeze Warning | FGF | 18 hr |
| Oct 25, 4:13 AM CDT | Wind Advisory | FGF | 39 hr |
| Nov 4, 3:43 PM CST | Winter Storm Watch | FGF | 23 hr |
| Nov 5, 3:09 PM CST | Winter Storm Warning | FGF | 45 hr |
| Nov 5, 6:24 PM CST | Wind Advisory | FGF | 10 hr |
| Nov 12, 6:52 PM CST | Winter Weather Advisory | FGF | 5 hr |
| Dec 2, 11:11 AM CST | Wind Advisory | FGF | 4 hr |
| Dec 12, 3:39 AM CST | Blizzard Watch | FGF | 25 hr |
| Dec 13, 4:03 AM CST | Blizzard Warning | FGF | 48 hr |
| Dec 15, 12:04 AM CST | Wind Chill Warning | FGF | 12 hr |
| Dec 15, 11:28 AM CST | Wind Chill Advisory | FGF | 6 hr |
| Dec 18, 2:48 PM CST | Winter Storm Watch | FGF | 24 hr |
| Dec 19, 4:01 AM CST | Winter Storm Warning | FGF | 38 hr |
| Dec 20, 11:36 AM CST | Winter Weather Advisory | FGF | 4 hr |
| Dec 20, 3:18 PM CST | Wind Chill Warning | FGF | 20 hr |
| Dec 21, 11:04 AM CST | Wind Chill Advisory | FGF | 10 hr |
| Dec 26, 2:48 PM CST | Winter Weather Advisory | FGF | 20 hr |
| Dec 28, 2:53 PM CST | Winter Weather Advisory | FGF | 17 hr |
| Dec 30, 2:40 PM CST | Wind Chill Advisory | FGF | 4 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 | 10 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 13 |
| Flooding | |
| Flash Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 2 |
| Blizzard Watch | 2 |
| Winter Storm Watch | 3 |
| Freezing Rain Advisory | 2 |
| Snow Advisory | 1 |
| Snow and Blowing Snow Advisory | 1 |
| Winter Weather Advisory | 12 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 6 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 12 |
| Wind and dust | |
| Wind Advisory | 21 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.