Alert archive / North Dakota / Pembina County
Weather alerts in Pembina County, North Dakota, 2020
138 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Pembina County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 138
- Warnings
- 45
- Watches
- 15
- Advisories
- 49
- Busiest month
- June39 alerts
- Busiest day
- June 8, 202016 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 Pembina County in 2020 had a tornado report inside them.
Pembina County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 26 | 23 | 12% | 15 | 93% | 23 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Forks, ND: tornado warnings | 42 | 14 | 67% | 52 | 56% | 8 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 308 | 261 | 15% | 707 | 85% | 26 min |
| NWS Grand Forks, ND: flash flood warnings | 12 | 11 | 8% | 21 | 90% | 201 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 4, 3:08 PM CST | Wind Advisory | FGF | 24 hr |
| Jan 7, 3:31 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Jan 9, 2:11 PM CST | Wind Chill Advisory | FGF | 22 hr |
| Jan 10, 11:56 AM CST | Wind Chill Advisory | FGF | 24 hr |
| Jan 14, 6:56 AM CST | Wind Chill Advisory | FGF | 56 hr |
| Jan 15, 2:53 PM CST | Winter Storm Watch | FGF | 38 hr |
| Jan 15, 9:52 PM CST | Wind Chill Warning | FGF | 9 hr |
| Jan 15, 9:52 PM CST | Wind Chill Advisory | FGF | 17 hr |
| Jan 16, 3:17 PM CST | Wind Chill Advisory | FGF | 8 hr |
| Jan 16, 3:17 PM CST | Winter Storm Warning | FGF | 51 hr |
| Jan 16, 3:17 PM CST | Winter Weather Advisory | FGF | 31 hr |
| Jan 17, 4:39 AM CST | Blizzard Warning | FGF | 37 hr |
| Jan 19, 2:25 PM CST | Wind Chill Advisory | FGF | 22 hr |
| Jan 25, 10:14 PM CST | Winter Weather Advisory | FGF | 23 hr |
| Jan 30, 4:08 AM CST | Winter Weather Advisory | FGF | 8 hr |
| Feb 1, 1:34 PM CST | Wind Advisory | FGF | 21 hr |
| Feb 6, 2:03 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Feb 7, 2:05 PM CST | Wind Chill Advisory | FGF | 16 hr |
| Feb 10, 3:31 AM CST | Winter Storm Watch | FGF | 35 hr |
| Feb 11, 2:51 PM CST | Winter Weather Advisory | FGF | 20 hr |
| Feb 11, 7:01 PM CST | Wind Chill Warning | FGF | 41 hr |
| Feb 12, 6:08 AM CST | Wind Chill Warning | FGF | 30 hr |
| Feb 12, 6:08 AM CST | Winter Weather Advisory | FGF | 4 hr |
| Feb 13, 2:31 PM CST | Wind Chill Advisory | FGF | 21 hr |
| Feb 15, 3:51 AM CST | Wind Chill Advisory | FGF | 28 hr |
| Feb 18, 2:30 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Feb 19, 2:26 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 29, 2:46 PM CST | Wind Advisory | FGF | 27 hr |
| Mar 4, 3:06 PM CST | Wind Advisory | FGF | 24 hr |
| Mar 6, 10:06 AM CST | Wind Advisory | FGF | 7 hr |
| Mar 19, 3:24 AM CDT | Winter Weather Advisory | FGF | 18 hr |
| Mar 29, 11:19 AM CDT | River Flood Warning | FGF | 38 days |
| Mar 29, 11:19 AM CDT | River Flood Warning | FGF | 39 days |
| Mar 30, 11:24 AM CDT | River Flood Warning | FGF | 21 days |
| Apr 1, 4:37 AM CDT | Winter Storm Watch | FGF | 23 hr |
| Apr 1, 3:30 PM CDT | Winter Storm Warning | FGF | 42 hr |
| Apr 6, 11:43 PM CDT | Dense Fog Advisory | FGF | 10 hr |
| Apr 7, 11:49 PM CDT | River Flood Warning | FGF | 16 hr |
| May 14, 5:39 AM CDT | Dense Fog Advisory | FGF | 3 hr |
| May 29, 2:30 PM CDT | Frost Advisory | FGF | 17 hr |
| Jun 7, 2:13 AM CDT | Special Weather Statement | FGF | 17 min |
| Jun 7, 2:18 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 7, 1:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 7, 3:06 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 7, 4:57 PM CDT | Special Weather Statement | FGF | 33 min |
| Jun 7, 5:05 PM CDT | Severe Thunderstorm Warning | FGF | 55 min |
| Jun 7, 5:18 PM CDT | Severe Thunderstorm Warning | FGF | 57 min |
| Jun 7, 5:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 6:34 PM CDT | Severe Thunderstorm Warning | FGF | 56 min |
| Jun 7, 7:26 PM CDT | Severe Thunderstorm Warning | FGF | 64 min |
| Jun 7, 8:10 PM CDT | Areal Flood Advisory | FGF | 6 hr |
| Jun 7, 8:12 PM CDT | Severe Thunderstorm Warning | FGF | 48 min |
| Jun 7, 8:23 PM CDT | Special Weather Statement | FGF | 67 min |
| Jun 7, 8:31 PM CDT | Severe Thunderstorm Warning | FGF | 44 min |
| Jun 7, 8:39 PM CDT | Severe Thunderstorm Warning | FGF | 51 min |
| Jun 7, 8:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 7, 8:58 PM CDT | Severe Thunderstorm Warning | FGF | 47 min |
| Jun 7, 9:17 PM CDT | Severe Thunderstorm Warning | FGF | 43 min |
| Jun 7, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 7, 11:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 8, 2:30 AM CDT | Areal Flood Advisory | FGF | 8 hr |
| Jun 8, 2:55 PM CDT | Special Weather Statement | FGF | 35 min |
| Jun 8, 2:58 PM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Jun 8, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 8, 3:06 PM CDT | Severe Thunderstorm Warning | FGF | 54 min |
| Jun 11, 3:13 PM CDT | Special Weather Statement | FGF | 32 min |
| Jun 11, 3:37 PM CDT | Severe Thunderstorm Warning | FGF | 53 min |
| Jun 14, 3:15 AM CDT | Wind Advisory | FGF | 16 hr |
| Jun 16, 3:13 AM CDT | Wind Advisory | FGF | 18 hr |
| Jun 17, 2:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 5:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 6:38 PM CDT | Severe Thunderstorm Warning | FGF | 37 min |
| Jun 17, 6:45 PM CDT | Severe Thunderstorm Warning | FGF | 60 min |
| Jun 17, 7:43 PM CDT | Severe Thunderstorm Warning | FGF | 47 min |
| Jun 17, 7:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 20, 1:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 20, 4:08 PM CDT | Severe Thunderstorm Warning | FGF | 37 min |
| Jun 20, 4:48 PM CDT | Special Weather Statement | FGF | 27 min |
| Jun 30, 6:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 8:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 30, 10:05 PM CDT | Special Weather Statement | FGF | 55 min |
| Jun 30, 10:59 PM CDT | Special Weather Statement | FGF | 61 min |
| Jul 4, 2:26 AM CDT | Severe Thunderstorm Warning | FGF | 39 min |
| Jul 4, 3:57 AM CDT | Special Weather Statement | FGF | 63 min |
| Jul 4, 4:55 AM CDT | Areal Flood Advisory | FGF | 14 hr |
| Jul 4, 6:15 AM CDT | Flash Flood Warning | FGF | 8 hr |
| Jul 4, 9:13 AM CDT | River Flood Warning | FGF | 6 days |
| Jul 4, 9:13 AM CDT | River Flood Warning | FGF | 7 days |
| Jul 4, 3:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 11:44 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 1:37 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 8, 2:20 AM CDT | Special Weather Statement | FGF | 40 min |
| Jul 8, 2:22 AM CDT | Severe Thunderstorm Warning | FGF | 53 min |
| Jul 13, 2:16 PM CDT | Special Weather Statement | FGF | 59 min |
| Jul 17, 12:30 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 2:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 17, 2:33 PM CDT | Severe Thunderstorm Warning | FGF | 57 min |
| Jul 17, 2:56 PM CDT | Severe Thunderstorm Warning | FGF | 64 min |
| Jul 17, 3:31 PM CDT | Special Weather Statement | FGF | 59 min |
| Jul 17, 3:54 PM CDT | Severe Thunderstorm Warning | FGF | 51 min |
| Jul 17, 4:18 PM CDT | Severe Thunderstorm Warning | FGF | 57 min |
| Jul 17, 4:23 PM CDT | Severe Thunderstorm Warning | FGF | 67 min |
| Jul 17, 6:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 24, 3:26 AM CDT | Excessive Heat Warning | FGF | 17 hr |
| Jul 24, 3:26 AM CDT | Heat Advisory | FGF | 17 hr |
| Jul 24, 4:53 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 8, 1:44 AM CDT | Special Weather Statement | FGF | 61 min |
| Aug 8, 1:58 AM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Aug 9, 11:24 AM CDT | Special Weather Statement | FGF | 66 min |
| Aug 9, 11:28 AM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Aug 9, 11:42 AM CDT | Tornado Warning | FGF | 36 min |
| Aug 9, 11:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 9, 12:18 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 9, 12:21 PM CDT | Severe Thunderstorm Warning | FGF | 54 min |
| Aug 14, 4:02 AM CDT | Dense Fog Advisory | FGF | 5 hr |
| Aug 15, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 21, 5:44 AM CDT | Dense Fog Advisory | FGF | 3 hr |
| Aug 23, 4:23 AM CDT | Dense Fog Advisory | FGF | 6 hr |
| Sep 1, 3:38 AM CDT | Wind Advisory | FGF | 16 hr |
| Sep 2, 2:53 PM CDT | Wind Advisory | FGF | 12 hr |
| Sep 6, 3:32 AM CDT | Wind Advisory | FGF | 18 hr |
| Sep 7, 2:48 AM CDT | Frost Advisory | FGF | 30 hr |
| Sep 7, 2:48 AM CDT | Freeze Watch | FGF | 36 hr |
| Sep 8, 2:54 PM CDT | Freeze Warning | FGF | 18 hr |
| Sep 16, 3:37 AM CDT | Freeze Warning | FGF | 28 hr |
| Sep 17, 9:44 PM CDT | Frost Advisory | FGF | 11 hr |
| Oct 1, 3:41 PM CDT | Frost Advisory | FGF | 16 hr |
| Oct 5, 2:39 PM CDT | Fire Weather Watch | FGF | 13 hr |
| Oct 6, 3:31 AM CDT | Wind Advisory | FGF | 11 hr |
| Oct 6, 3:40 AM CDT | Red Flag Warning | FGF | 12 hr |
| Oct 30, 1:58 PM CDT | Wind Advisory | FGF | 38 hr |
| Nov 19, 2:46 AM CST | Winter Weather Advisory | FGF | 21 hr |
| Nov 24, 3:36 AM CST | Winter Weather Advisory | FGF | 11 hr |
| Dec 21, 4:30 AM CST | Winter Storm Watch | FGF | 35 hr |
| Dec 22, 3:28 PM CST | Blizzard Warning | FGF | 28 hr |
| Dec 23, 12:37 PM CST | Winter Weather Advisory | FGF | 2 hr |
| Dec 23, 3:05 PM CST | Wind Chill Advisory | FGF | 24 hr |
| Dec 28, 3:13 PM CST | Winter Weather Advisory | FGF | 42 hr |
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 archive20192021
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.