Alert archive / North Dakota / Ward County
Weather alerts in Ward County, North Dakota, 2009
62 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ward County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 62
- Warnings
- 31
- Watches
- 9
- Advisories
- 5
- Busiest month
- July13 alerts
- Busiest day
- July 9, 20098 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 3 tornado warnings covering Ward County in 2009 had a tornado report inside them.
Ward County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 2 | 33% | 0 | ||
| Severe thunderstorm warnings | 17 | 3 | 82% | 2 | 50% | 3 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Bismarck, ND: tornado warnings | 56 | 11 | 80% | 19 | 79% | 13 min |
| NWS Bismarck, ND: severe thunderstorm warnings | 180 | 61 | 66% | 124 | 70% | 23 min |
| NWS Bismarck, ND: flash flood warnings | 15 | 2 | 87% | 2 | 100% | 46 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 13, 11:50 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 9, 12:12 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 9, 5:52 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 22, 9:54 AM CDT | Severe Thunderstorm Warning | BIS | 51 min |
| Mar 22, 10:22 AM CDT | Areal Flood Warning | BIS | 5 days |
| Mar 22, 10:48 AM CDT | Severe Thunderstorm Warning | BIS | 57 min |
| Mar 23, 6:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 10, 9:47 PM CDT | River Flood Warning | BIS | 5 days |
| Apr 10, 9:47 PM CDT | River Flood Warning | BIS | 7 days |
| Apr 10, 9:47 PM CDT | River Flood Warning | BIS | 7 days |
| Apr 10, 9:47 PM CDT | River Flood Warning | BIS | 5 days |
| Apr 12, 1:21 PM CDT | Areal Flood Warning | BIS | 8 days |
| Apr 12, 8:54 PM CDT | River Flood Warning | BIS | 5 days |
| Apr 21, 4:25 AM CDT | Areal Flood Warning | BIS | 11 hr |
| Apr 21, 3:02 PM CDT | Areal Flood Warning | BIS | 48 hr |
| Apr 23, 3:15 PM CDT | Areal Flood Warning | BIS | 7 days |
| May 12, 3:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 12, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 12, 4:30 PM CDT | Severe Thunderstorm Warning | BIS | 45 min |
| May 12, 5:15 PM CDT | Severe Thunderstorm Warning | BIS | 60 min |
| May 12, 5:46 PM CDT | Severe Thunderstorm Warning | BIS | 29 min |
| Jun 18, 2:25 PM CDT | Severe Thunderstorm Warning | BIS | 35 min |
| Jun 18, 4:58 PM CDT | Severe Thunderstorm Warning | BIS | 62 min |
| Jun 22, 1:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 3:06 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 22, 5:28 PM CDT | Severe Thunderstorm Warning | BIS | 47 min |
| Jun 22, 6:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 26, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 8:08 PM CDT | Severe Thunderstorm Warning | BIS | 52 min |
| Jun 26, 8:33 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| Jun 26, 8:49 PM CDT | Flash Flood Warning | BIS | 3 hr |
| Jun 27, 12:00 AM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jun 27, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:20 PM CDT | Tornado Watch | SPC | 8 hr |
| Jul 8, 6:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 8, 7:56 PM CDT | Severe Thunderstorm Warning | BIS | 64 min |
| Jul 8, 8:10 PM CDT | Tornado Warning | BIS | 35 min |
| Jul 8, 9:16 PM CDT | Severe Thunderstorm Warning | BIS | 10 min |
| Jul 8, 9:21 PM CDT | Tornado Warning | BIS | 35 min |
| Jul 8, 9:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 8, 10:23 PM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jul 8, 10:29 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 11:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 11, 10:15 PM CDT | Tornado Warning | BIS | 30 min |
| Jul 11, 10:44 PM CDT | Severe Thunderstorm Warning | BIS | 20 min |
| Jul 19, 7:28 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 14, 12:33 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 14, 2:59 AM CDT | Severe Thunderstorm Warning | BIS | 61 min |
| Aug 14, 4:30 AM CDT | Severe Thunderstorm Warning | BIS | 45 min |
| Aug 19, 12:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 23, 8:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 23, 8:55 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 23, 11:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 24, 1:27 AM CDT | Mesoscale Discussion | SPC | 33 min |
| Aug 24, 1:48 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 24, 2:15 AM CDT | Severe Thunderstorm Warning | BIS | 60 min |
| Aug 24, 2:44 AM CDT | Areal Flood Advisory | BIS | 4 hr |
| Sep 8, 1:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 8, 4:09 AM CDT | Severe Thunderstorm Warning | BIS | 51 min |
| Sep 8, 4:43 AM CDT | Areal Flood Advisory | BIS | 3 hr |
| Sep 10, 4:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Sep 10, 7:46 PM CDT | Severe Thunderstorm Warning | BIS | 44 min |
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 | 17 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 17 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 1 |
| River Flood Warning | 5 |
| Areal Flood Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.