Alert archive / North Dakota / Ward County
Weather alerts in Ward County, North Dakota, 2011
95 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 95
- Warnings
- 46
- Watches
- 11
- Advisories
- 16
- Busiest month
- July33 alerts
- Busiest day
- June 25, 201110 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Ward County in 2011 had a tornado report inside them.
Ward County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 21 | 13 | 38% | 5 | 80% | 27 min |
| Flash flood warnings | 4 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Bismarck, ND: tornado warnings | 93 | 24 | 74% | 42 | 67% | 18 min |
| NWS Bismarck, ND: severe thunderstorm warnings | 334 | 147 | 56% | 286 | 85% | 26 min |
| NWS Bismarck, ND: flash flood warnings | 47 | 13 | 72% | 20 | 85% | 58 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 |
|---|---|---|---|
| Feb 17, 2:40 PM CST | River Flood Advisory | BIS | 2 hr |
| Mar 22, 10:39 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 6, 11:22 AM CDT | River Flood Warning | BIS | 116 days |
| Apr 6, 11:22 AM CDT | River Flood Warning | BIS | 118 days |
| Apr 6, 11:22 AM CDT | River Flood Warning | BIS | 103 days |
| Apr 6, 2:35 PM CDT | Areal Flood Warning | BIS | 7 days |
| Apr 7, 10:25 AM CDT | River Flood Warning | BIS | 7 days |
| Apr 12, 4:53 PM CDT | River Flood Warning | BIS | 69 hr |
| Apr 14, 10:11 AM CDT | Areal Flood Warning | BIS | 20 days |
| Apr 18, 8:06 PM CDT | River Flood Advisory | BIS | 40 min |
| Apr 18, 8:06 PM CDT | River Flood Advisory | BIS | 40 min |
| Apr 18, 8:06 PM CDT | River Flood Advisory | BIS | 40 min |
| Apr 18, 8:06 PM CDT | River Flood Advisory | BIS | 40 min |
| Apr 22, 11:18 AM CDT | River Flood Warning | BIS | 7 days |
| May 10, 12:34 PM CDT | River Flood Warning | BIS | 68 days |
| May 10, 2:05 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| May 11, 9:40 AM CDT | River Flood Warning | BIS | 26 hr |
| May 11, 10:18 AM CDT | Areal Flood Warning | BIS | 50 hr |
| May 20, 11:10 AM CDT | River Flood Warning | BIS | 27 hr |
| May 20, 12:18 PM CDT | Areal Flood Warning | BIS | 3 days |
| May 30, 2:42 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| May 30, 4:03 PM CDT | Flash Flood Warning | BIS | 3 hr |
| May 30, 7:00 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| May 31, 5:00 AM CDT | Areal Flood Advisory | BIS | 7 hr |
| May 31, 7:00 AM CDT | Areal Flood Warning | BIS | 51 hr |
| May 31, 10:49 AM CDT | River Flood Warning | BIS | 3 days |
| May 31, 12:50 PM CDT | Areal Flood Advisory | BIS | 45 hr |
| Jun 2, 5:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 7, 7:37 PM CDT | Areal Flood Warning | BIS | 66 hr |
| Jun 12, 6:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 12, 6:28 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 12, 9:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 13, 1:59 AM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jun 20, 9:12 PM CDT | Areal Flood Advisory | BIS | 24 hr |
| Jun 21, 12:52 PM CDT | River Flood Warning | BIS | 47 hr |
| Jun 22, 9:41 AM CDT | Flash Flood Warning | BIS | 6 hr |
| Jun 25, 5:42 AM CDT | Flash Flood Warning | BIS | 6 hr |
| Jun 25, 3:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 25, 4:04 PM CDT | Severe Thunderstorm Warning | BIS | 56 min |
| Jun 25, 4:50 PM CDT | Severe Thunderstorm Warning | BIS | 25 min |
| Jun 25, 4:52 PM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jun 25, 5:05 PM CDT | Severe Thunderstorm Warning | BIS | 55 min |
| Jun 25, 5:41 PM CDT | Severe Thunderstorm Warning | BIS | 19 min |
| Jun 25, 5:46 PM CDT | Flash Flood Warning | BIS | 3 hr |
| Jun 25, 5:57 PM CDT | Severe Thunderstorm Warning | BIS | 42 min |
| Jun 25, 6:19 PM CDT | Severe Thunderstorm Warning | BIS | 41 min |
| Jul 3, 9:41 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 3, 11:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 6, 1:25 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 8, 2:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jul 8, 2:32 PM CDT | Tornado Watch | SPC | 9 hr |
| Jul 8, 3:19 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| Jul 8, 3:29 PM CDT | Severe Thunderstorm Warning | BIS | 40 min |
| Jul 8, 7:31 PM CDT | Areal Flood Warning | BIS | 6 hr |
| Jul 14, 11:01 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 15, 2:20 AM CDT | Severe Thunderstorm Warning | BIS | 55 min |
| Jul 15, 2:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 3:11 AM CDT | Severe Thunderstorm Warning | BIS | 49 min |
| Jul 16, 1:21 AM CDT | Severe Thunderstorm Warning | BIS | 54 min |
| Jul 16, 4:57 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 17, 9:15 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 9:40 AM CDT | Severe Thunderstorm Warning | BIS | 50 min |
| Jul 17, 9:54 AM CDT | Tornado Warning | BIS | 36 min |
| Jul 17, 10:13 AM CDT | Severe Thunderstorm Warning | BIS | 47 min |
| Jul 17, 10:25 AM CDT | Tornado Warning | BIS | 35 min |
| Jul 17, 11:29 AM CDT | River Flood Warning | BIS | 9 days |
| Jul 20, 5:02 AM CDT | Severe Thunderstorm Warning | BIS | 58 min |
| Jul 20, 5:02 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 20, 5:25 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 5:43 AM CDT | Severe Thunderstorm Warning | BIS | 62 min |
| Jul 22, 5:35 PM CDT | Tornado Watch | SPC | 8 hr |
| Jul 22, 8:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 22, 9:22 PM CDT | Severe Thunderstorm Warning | BIS | 53 min |
| Jul 26, 10:45 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 26, 2:11 PM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jul 28, 2:30 PM CDT | Severe Thunderstorm Warning | BIS | 30 min |
| Jul 29, 10:14 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 29, 10:41 PM CDT | Severe Thunderstorm Warning | BIS | 64 min |
| Jul 29, 11:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 31, 10:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 31, 11:26 PM CDT | Severe Thunderstorm Warning | BIS | 64 min |
| Aug 1, 1:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 4, 5:49 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 11:59 PM CDT | Severe Thunderstorm Warning | BIS | 61 min |
| Aug 11, 11:39 AM CDT | Areal Flood Advisory | BIS | 5 hr |
| Aug 15, 5:23 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 15, 9:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 16, 2:05 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 27, 7:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 31, 8:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 31, 8:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 31, 10:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 31, 10:56 PM CDT | Severe Thunderstorm Warning | BIS | 64 min |
| Sep 1, 12:02 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Oct 23, 8:17 PM CDT | Severe Thunderstorm Warning | BIS | 43 min |
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 archive20102012
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.