Alert archive / North Dakota / Cass County
Weather alerts in Cass County, North Dakota, 2014
136 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cass County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 136
- Warnings
- 40
- Watches
- 14
- Advisories
- 64
- Busiest month
- January27 alerts
- Busiest day
- September 4, 201411 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Cass County in 2014 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 7 minutes after it went out.
Cass County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 2 | 50% | 7 min |
| Severe thunderstorm warnings | 16 | 16 | 0% | 16 | 75% | 25 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 0% |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Forks, ND: tornado warnings | 25 | 13 | 48% | 22 | 68% | 14 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 74 | 73 | 1% | 240 | 76% | 24 min |
| NWS Grand Forks, ND: flash flood warnings | 8 | 7 | 13% | 24 | 67% | 83 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 2, 2:23 PM CST | Blizzard Watch | FGF | 21 hr |
| Jan 2, 2:23 PM CST | Wind Chill Advisory | FGF | 14 hr |
| Jan 3, 3:59 AM CST | Blizzard Warning | FGF | 24 hr |
| Jan 3, 3:59 AM CST | Winter Weather Advisory | FGF | 27 hr |
| Jan 4, 4:00 AM CST | Wind Chill Warning | FGF | 72 hr |
| Jan 4, 4:00 AM CST | Wind Chill Advisory | FGF | 14 hr |
| Jan 7, 3:54 AM CST | Wind Chill Advisory | FGF | 29 hr |
| Jan 8, 3:00 PM CST | Wind Chill Advisory | FGF | 13 hr |
| Jan 12, 2:09 AM CST | Freezing Rain Advisory | FGF | 7 hr |
| Jan 13, 3:32 AM CST | Winter Weather Advisory | FGF | 32 hr |
| Jan 14, 3:39 PM CST | Blizzard Watch | FGF | 13 hr |
| Jan 15, 4:38 AM CST | Blizzard Warning | FGF | 37 hr |
| Jan 17, 3:24 PM CST | Winter Weather Advisory | FGF | 18 hr |
| Jan 20, 4:00 AM CST | Wind Chill Advisory | FGF | 32 hr |
| Jan 21, 3:39 PM CST | Winter Weather Advisory | FGF | 11 hr |
| Jan 22, 2:58 AM CST | Blizzard Warning | FGF | 10 hr |
| Jan 22, 4:13 AM CST | Wind Chill Advisory | FGF | 11 hr |
| Jan 22, 12:50 PM CST | Winter Weather Advisory | FGF | 3 hr |
| Jan 22, 3:38 PM CST | Wind Chill Warning | FGF | 20 hr |
| Jan 24, 4:20 AM CST | Blizzard Watch | FGF | 9 hr |
| Jan 24, 4:20 AM CST | Winter Weather Advisory | FGF | 19 hr |
| Jan 24, 1:49 PM CST | Blizzard Warning | FGF | 8 hr |
| Jan 25, 4:36 AM CST | Blizzard Watch | FGF | 10 hr |
| Jan 25, 2:54 PM CST | Blizzard Warning | FGF | 31 hr |
| Jan 26, 9:33 PM CST | Wind Chill Warning | FGF | 38 hr |
| Jan 28, 12:01 PM CST | Wind Chill Advisory | FGF | 18 hr |
| Jan 30, 3:05 AM CST | Wind Chill Advisory | FGF | 33 hr |
| Feb 1, 3:17 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 3, 3:41 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Feb 5, 4:05 AM CST | Wind Chill Advisory | FGF | 32 hr |
| Feb 6, 3:44 PM CST | Wind Chill Advisory | FGF | 18 hr |
| Feb 8, 3:08 PM CST | Wind Chill Advisory | FGF | 21 hr |
| Feb 10, 3:24 PM CST | Wind Chill Advisory | FGF | 18 hr |
| Feb 12, 4:03 AM CST | Winter Weather Advisory | FGF | 32 hr |
| Feb 13, 8:41 AM CST | Blizzard Warning | FGF | 3 hr |
| Feb 16, 3:20 AM CST | Winter Weather Advisory | FGF | 33 hr |
| Feb 21, 3:15 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 23, 3:27 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 24, 3:08 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 25, 3:18 PM CST | Wind Chill Advisory | FGF | 18 hr |
| Feb 25, 3:18 PM CST | Winter Weather Advisory | FGF | 30 hr |
| Feb 26, 3:37 PM CST | Wind Chill Advisory | FGF | 18 hr |
| Feb 26, 4:32 PM CST | Blizzard Warning | FGF | 4 hr |
| Feb 27, 3:24 PM CST | Wind Chill Advisory | FGF | 18 hr |
| Feb 28, 3:59 PM CST | Wind Chill Warning | FGF | 42 hr |
| Feb 28, 3:59 PM CST | Wind Chill Advisory | FGF | 23 hr |
| Mar 2, 10:04 AM CST | Wind Chill Advisory | FGF | 14 hr |
| Mar 20, 4:31 AM CDT | Winter Weather Advisory | FGF | 35 hr |
| Mar 20, 3:50 PM CDT | Wind Advisory | FGF | 27 hr |
| Mar 29, 4:12 AM CDT | Winter Storm Watch | FGF | 35 hr |
| Mar 29, 3:47 PM CDT | Blizzard Watch | FGF | 36 hr |
| Mar 30, 3:27 PM CDT | Blizzard Warning | FGF | 40 hr |
| Mar 31, 6:18 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 31, 12:08 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 31, 8:37 PM CDT | Mesoscale Discussion | SPC | 5 hr |
| Apr 9, 4:54 AM CDT | Wind Advisory | FGF | 16 hr |
| Apr 9, 4:41 PM CDT | Mesoscale Discussion | SPC | 79 min |
| Apr 18, 3:48 AM CDT | Wind Advisory | FGF | 24 hr |
| Apr 23, 3:50 AM CDT | Wind Advisory | FGF | 15 hr |
| Apr 26, 3:29 PM CDT | Wind Advisory | FGF | 28 hr |
| Apr 27, 10:47 AM CDT | River Flood Warning | FGF | 11 days |
| Apr 29, 8:14 PM CDT | River Flood Warning | FGF | 3 days |
| May 11, 8:20 PM CDT | River Flood Warning | FGF | 7 days |
| May 13, 3:17 PM CDT | Frost Advisory | FGF | 17 hr |
| May 14, 2:43 PM CDT | Freeze Warning | FGF | 18 hr |
| May 15, 2:54 PM CDT | Freeze Warning | FGF | 17 hr |
| May 25, 2:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 30, 2:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 1, 1:27 AM CDT | Areal Flood Advisory | FGF | 9 hr |
| Jun 5, 3:59 PM CDT | Tornado Warning | FGF | 30 min |
| Jun 5, 4:48 PM CDT | Tornado Warning | FGF | 30 min |
| Jun 15, 11:28 AM CDT | River Flood Warning | FGF | 22 days |
| Jun 18, 9:42 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 18, 11:03 PM CDT | Severe Thunderstorm Warning | FGF | 27 min |
| Jun 19, 2:12 AM CDT | Areal Flood Advisory | FGF | 7 hr |
| Jun 20, 3:18 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 12:20 PM CDT | Flash Flood Watch | FGF | 16 hr |
| Jun 21, 2:59 PM CDT | Severe Thunderstorm Warning | FGF | 61 min |
| Jun 21, 3:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 21, 3:28 PM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Jun 21, 3:37 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 3:57 PM CDT | Severe Thunderstorm Warning | FGF | 49 min |
| Jun 21, 4:32 PM CDT | Severe Thunderstorm Warning | FGF | 43 min |
| Jun 21, 8:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 27, 2:18 PM CDT | Flash Flood Watch | FGF | 25 hr |
| Jun 27, 2:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:41 PM CDT | Wind Advisory | FGF | 7 hr |
| Jun 29, 4:26 AM CDT | Wind Advisory | FGF | 16 hr |
| Jun 30, 4:23 AM CDT | Wind Advisory | FGF | 15 hr |
| Jul 5, 10:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 5, 10:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 11:42 PM CDT | Severe Thunderstorm Warning | FGF | 48 min |
| Jul 6, 12:07 AM CDT | Severe Thunderstorm Warning | FGF | 53 min |
| Jul 6, 12:22 AM CDT | Severe Thunderstorm Warning | FGF | 53 min |
| Jul 20, 3:11 PM CDT | Heat Advisory | FGF | 28 hr |
| Jul 21, 4:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 21, 5:07 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 6:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 21, 8:09 PM CDT | Severe Thunderstorm Warning | FGF | 66 min |
| Jul 21, 8:43 PM CDT | Severe Thunderstorm Warning | FGF | 46 min |
| Jul 21, 9:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Aug 16, 5:47 PM CDT | Areal Flood Advisory | FGF | 5 hr |
| Sep 4, 1:17 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 4, 1:48 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 4, 2:36 AM CDT | Severe Thunderstorm Warning | FGF | 54 min |
| Sep 4, 2:40 AM CDT | Severe Thunderstorm Warning | FGF | 65 min |
| Sep 4, 2:48 AM CDT | Severe Thunderstorm Warning | FGF | 42 min |
| Sep 4, 3:28 AM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Sep 4, 3:51 AM CDT | Severe Thunderstorm Warning | FGF | 54 min |
| Sep 4, 3:55 AM CDT | Flash Flood Warning | FGF | 8 hr |
| Sep 4, 4:02 AM CDT | Severe Thunderstorm Warning | FGF | 58 min |
| Sep 4, 4:10 AM CDT | Tornado Warning | FGF | 39 min |
| Sep 4, 4:43 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 9:29 PM CDT | River Flood Warning | FGF | 52 hr |
| Sep 11, 2:51 PM CDT | Frost Advisory | FGF | 19 hr |
| Sep 12, 3:18 PM CDT | Frost Advisory | FGF | 17 hr |
| Sep 20, 12:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Sep 20, 5:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Oct 2, 1:01 PM CDT | Wind Advisory | FGF | 30 hr |
| Nov 1, 10:43 AM CDT | Red Flag Warning | FGF | 7 hr |
| Nov 6, 4:57 PM CST | High Wind Watch | FGF | 10 hr |
| Nov 7, 3:22 AM CST | Wind Advisory | FGF | 21 hr |
| Nov 16, 3:40 AM CST | Winter Weather Advisory | FGF | 15 hr |
| Nov 16, 3:47 AM CST | Wind Advisory | FGF | 11 hr |
| Nov 23, 3:27 AM CST | Wind Advisory | FGF | 13 hr |
| Nov 23, 4:47 PM CST | Freezing Rain Advisory | FGF | 10 hr |
| Nov 23, 4:52 PM CST | Wind Advisory | FGF | 17 hr |
| Nov 25, 3:54 AM CST | Winter Weather Advisory | FGF | 24 hr |
| Nov 27, 3:32 AM CST | Winter Weather Advisory | FGF | 24 hr |
| Nov 30, 12:05 PM CST | Wind Chill Advisory | FGF | 24 hr |
| Dec 12, 10:04 PM CST | Dense Fog Advisory | FGF | 15 hr |
| Dec 13, 3:39 PM CST | Dense Fog Advisory | FGF | 20 hr |
| Dec 14, 12:14 PM CST | Freezing Rain Advisory | FGF | 25 hr |
| Dec 14, 12:20 PM CST | Dense Fog Advisory | FGF | 16 hr |
| Dec 27, 3:49 PM CST | Wind Chill Advisory | FGF | 68 hr |
| Dec 30, 3:03 PM CST | Wind Chill Advisory | FGF | 15 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 | 16 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 18 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 5 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Blizzard Warning | 8 |
| Blizzard Watch | 5 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 4 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 25 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 13 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20132015
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.