Alert archive / North Dakota / Morton County
Weather alerts in Morton County, North Dakota, 2009
101 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Morton County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 101
- Warnings
- 44
- Watches
- 12
- Advisories
- 14
- Busiest month
- June33 alerts
- Busiest day
- June 27, 200913 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 4 tornado warnings covering Morton County in 2009 had a tornado report inside them.
Morton County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 22 | 10 | 55% | 7 | 86% | 22 min |
| Flash flood warnings | 4 | 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 8, 12:55 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 12, 5:34 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 5:52 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 25, 10:20 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Mar 14, 1:54 PM CDT | Areal Flood Advisory | BIS | 24 hr |
| Mar 15, 2:03 PM CDT | Areal Flood Advisory | BIS | 24 hr |
| Mar 16, 2:23 PM CDT | Areal Flood Advisory | BIS | 51 hr |
| Mar 18, 5:17 PM CDT | Areal Flood Advisory | BIS | 3 days |
| Mar 19, 11:45 AM CDT | River Flood Warning | BIS | 9 days |
| Mar 19, 1:39 PM CDT | Areal Flood Warning | BIS | 58 hr |
| Mar 21, 10:20 AM CDT | Areal Flood Warning | BIS | 13 hr |
| Mar 21, 1:08 PM CDT | Areal Flood Warning | BIS | 10 hr |
| Mar 21, 10:13 PM CDT | Areal Flood Warning | BIS | 12 hr |
| Mar 22, 10:22 AM CDT | Areal Flood Warning | BIS | 5 days |
| Mar 22, 11:50 AM CDT | River Flood Warning | BIS | 5 hr |
| Mar 22, 5:16 PM CDT | River Flood Warning | BIS | 4 days |
| Mar 23, 6:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 25, 9:34 AM CDT | Flash Flood Warning | BIS | 3 hr |
| Mar 27, 3:20 PM CDT | Areal Flood Warning | BIS | 4 days |
| Mar 29, 10:05 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 30, 6:36 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 8, 10:28 PM CDT | River Flood Warning | BIS | 13 days |
| Apr 11, 7:38 PM CDT | Areal Flood Warning | BIS | 18 hr |
| Apr 12, 11:42 AM CDT | River Flood Warning | BIS | 4 days |
| Apr 12, 1:21 PM CDT | Areal Flood Warning | BIS | 8 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, 5:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 12, 6:06 PM CDT | Severe Thunderstorm Warning | BIS | 39 min |
| May 12, 6:48 PM CDT | Severe Thunderstorm Warning | BIS | 57 min |
| May 12, 7:03 PM CDT | Severe Thunderstorm Warning | BIS | 57 min |
| May 12, 7:28 PM CDT | Severe Thunderstorm Warning | BIS | 47 min |
| May 12, 7:35 PM CDT | Severe Thunderstorm Warning | BIS | 25 min |
| Jun 15, 8:05 PM CDT | Severe Thunderstorm Warning | BIS | 55 min |
| Jun 15, 8:19 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| Jun 15, 8:46 PM CDT | Flash Flood Warning | BIS | 4 hr |
| Jun 15, 8:51 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| Jun 15, 10:01 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| Jun 16, 12:56 AM CDT | Areal Flood Warning | BIS | 36 hr |
| Jun 16, 1:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 16, 2:05 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 16, 3:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 4:43 PM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jun 16, 5:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 18, 12:04 PM CDT | Areal Flood Advisory | BIS | 6 hr |
| 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, 5:40 PM CDT | Severe Thunderstorm Warning | BIS | 65 min |
| Jun 22, 6:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 6:37 PM CDT | Severe Thunderstorm Warning | BIS | 38 min |
| Jun 26, 2:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 26, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 6:43 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 26, 7:12 PM CDT | Severe Thunderstorm Warning | BIS | 63 min |
| Jun 26, 7:22 PM CDT | Tornado Warning | BIS | 23 min |
| Jun 26, 7:43 PM CDT | Severe Thunderstorm Warning | BIS | 62 min |
| Jun 26, 7:55 PM CDT | Tornado Warning | BIS | 35 min |
| 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, 9:13 PM CDT | Flash Flood Warning | BIS | 3 hr |
| Jun 26, 11:52 PM CDT | Areal Flood Advisory | BIS | 6 hr |
| Jun 27, 12:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 27, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 2:58 PM CDT | Severe Thunderstorm Warning | BIS | 43 min |
| Jun 27, 3:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 27, 5:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 7, 8:06 AM CDT | Areal Flood Advisory | BIS | 3 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, 8:58 PM CDT | Severe Thunderstorm Warning | BIS | 62 min |
| Jul 8, 9:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 8, 9:54 PM CDT | Severe Thunderstorm Warning | BIS | 66 min |
| Jul 8, 10:13 PM CDT | Tornado Warning | BIS | 32 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, 10:55 PM CDT | Severe Thunderstorm Warning | BIS | 65 min |
| Jul 8, 10:58 PM CDT | Severe Thunderstorm Warning | BIS | 62 min |
| Jul 8, 11:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 9, 3:07 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 11, 8:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 12, 12:29 AM CDT | Severe Thunderstorm Warning | BIS | 38 min |
| Jul 12, 1:49 AM CDT | Severe Thunderstorm Warning | BIS | 56 min |
| Jul 13, 10:57 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 7:28 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 11:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 2, 2:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 14, 12:33 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 19, 12:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 23, 8:55 PM CDT | Tornado Watch | SPC | 5 hr |
| Sep 8, 1:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 8, 2:38 AM CDT | Severe Thunderstorm Warning | BIS | 67 min |
| Sep 8, 2:40 AM CDT | Tornado Warning | BIS | 35 min |
| Sep 8, 3:23 AM CDT | Severe Thunderstorm Warning | BIS | 37 min |
| Sep 10, 4:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Sep 10, 7:29 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 10, 9:26 PM CDT | Severe Thunderstorm Warning | BIS | 54 min |
| Sep 10, 10:26 PM CDT | Severe Thunderstorm Warning | BIS | 64 min |
| Sep 10, 10:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Sep 10, 11:29 PM CDT | Areal Flood Advisory | BIS | 3 hr |
| Sep 10, 11:44 PM CDT | Flash Flood Warning | BIS | 89 min |
| Sep 10, 11:45 PM CDT | Mesoscale Discussion | SPC | 90 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 | 22 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 31 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 4 |
| River Flood Warning | 5 |
| Areal Flood Advisory | 14 |
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.