Alert archive / North Dakota / McLean County
Weather alerts in McLean County, North Dakota, 2017
38 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
McLean County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 38
- Warnings
- 16
- Watches
- 4
- Advisories
- 0
- Busiest month
- July26 alerts
- Busiest day
- July 14, 20176 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 1 tornado warnings covering McLean County in 2017 had a tornado report inside them.
McLean County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 13 | 9 | 31% | 10 | 60% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Bismarck, ND: tornado warnings | 5 | 1 | 80% | 1 | 100% | 2 min |
| NWS Bismarck, ND: severe thunderstorm warnings | 148 | 98 | 34% | 188 | 89% | 25 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 |
|---|---|---|---|
| May 15, 7:47 PM CDT | Special Weather Statement | BIS | 28 min |
| May 28, 12:47 PM CDT | Special Weather Statement | BIS | 28 min |
| Jun 9, 4:43 PM CDT | Severe Thunderstorm Warning | BIS | 62 min |
| Jun 9, 4:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 1:18 AM CDT | Severe Thunderstorm Warning | BIS | 57 min |
| Jun 10, 3:39 AM CDT | Severe Thunderstorm Warning | BIS | 51 min |
| Jun 29, 3:56 PM CDT | Tornado Warning | BIS | 34 min |
| Jun 29, 5:01 PM CDT | Special Weather Statement | BIS | 44 min |
| Jul 4, 10:37 AM CDT | Special Weather Statement | BIS | 38 min |
| Jul 5, 5:52 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 3:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 14, 4:04 PM CDT | Special Weather Statement | BIS | 41 min |
| Jul 14, 4:14 PM CDT | Severe Thunderstorm Warning | BIS | 61 min |
| Jul 14, 5:04 PM CDT | Severe Thunderstorm Warning | BIS | 43 min |
| Jul 14, 5:15 PM CDT | Severe Thunderstorm Warning | BIS | 60 min |
| Jul 14, 6:00 PM CDT | Severe Thunderstorm Warning | BIS | 60 min |
| Jul 16, 7:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 10:02 PM CDT | Special Weather Statement | BIS | 43 min |
| Jul 16, 11:04 PM CDT | Special Weather Statement | BIS | 26 min |
| Jul 16, 11:12 PM CDT | Special Weather Statement | BIS | 33 min |
| Jul 19, 7:01 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 20, 3:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 20, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 20, 4:19 PM CDT | Severe Thunderstorm Warning | BIS | 56 min |
| Jul 20, 5:17 PM CDT | Severe Thunderstorm Warning | BIS | 58 min |
| Jul 20, 6:13 PM CDT | Severe Thunderstorm Warning | BIS | 33 min |
| Jul 21, 7:46 PM CDT | Special Weather Statement | BIS | 29 min |
| Jul 21, 7:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 21, 8:04 PM CDT | Special Weather Statement | BIS | 26 min |
| Jul 21, 8:10 PM CDT | Severe Thunderstorm Warning | BIS | 65 min |
| Jul 21, 8:16 PM CDT | Severe Thunderstorm Warning | BIS | 59 min |
| Jul 24, 3:50 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 10:00 PM CDT | Special Weather Statement | BIS | 45 min |
| Jul 29, 6:37 PM CDT | Severe Thunderstorm Warning | BIS | 68 min |
| Sep 3, 3:21 PM CDT | Fire Weather Watch | BIS | 12 hr |
| Sep 4, 3:45 AM CDT | Red Flag Warning | BIS | 16 hr |
| Oct 17, 1:49 PM CDT | Fire Weather Watch | BIS | 13 hr |
| Oct 18, 3:16 AM CDT | Red Flag Warning | BIS | 16 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 | 13 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 11 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.