Alert archive / North Dakota / Grant County

Weather alerts in Grant County, North Dakota, 2023

95 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Grant County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 95
Warnings: 23
Watches: 8
Advisories: 49
Busiest month: March12 alerts
Busiest day: July 30, 20235 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Grant County, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	11	9	18%	7	100%	21 min
Flash flood warnings	0			0

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	4	1	75%	4	25%	11 min
NWS Bismarck, ND: severe thunderstorm warnings	132	89	33%	203	86%	26 min
NWS Bismarck, ND: flash flood warnings	1	0	100%	0

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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 3, 1:06 AM MST	Dense Fog Advisory	BIS	34 hr
Jan 3, 11:27 PM MST	Dense Fog Advisory	BIS	14 hr
Jan 5, 8:53 PM MST	Dense Fog Advisory	BIS	14 hr
Jan 11, 5:44 AM MST	Dense Fog Advisory	BIS	3 hr
Jan 12, 4:55 PM MST	Dense Fog Advisory	BIS	15 hr
Jan 15, 5:18 AM MST	Dense Fog Advisory	BIS	33 hr
Jan 16, 9:34 AM MST	Winter Weather Advisory	BIS	25 hr
Jan 18, 8:15 PM MST	Dense Fog Advisory	BIS	36 hr
Jan 25, 3:06 AM MST	Wind Advisory	BIS	51 hr
Jan 28, 12:27 PM MST	Wind Chill Advisory	BIS	46 hr
Feb 14, 2:28 AM MST	Wind Advisory	BIS	14 hr
Feb 14, 2:28 AM MST	Winter Weather Advisory	BIS	29 hr
Feb 20, 1:51 AM MST	Winter Weather Advisory	BIS	43 hr
Feb 21, 12:58 PM MST	Wind Chill Advisory	BIS	4 days
Feb 21, 12:58 PM MST	Winter Weather Advisory	BIS	46 hr
Feb 27, 1:37 PM MST	Winter Weather Advisory	BIS	45 hr
Feb 28, 12:51 AM MST	Winter Storm Warning	BIS	34 hr
Mar 3, 1:44 PM MST	Winter Storm Watch	BIS	24 hr
Mar 4, 1:59 PM MST	Winter Storm Warning	BIS	39 hr
Mar 6, 12:35 PM MST	Winter Weather Advisory	BIS	38 hr
Mar 8, 10:33 AM MST	Winter Weather Advisory	BIS	36 hr
Mar 10, 1:43 AM MST	Blizzard Warning	BIS	47 hr
Mar 10, 1:43 AM MST	Winter Weather Advisory	BIS	51 hr
Mar 10, 7:41 PM MST	Winter Weather Advisory	BIS	38 hr
Mar 17, 2:37 AM MDT	Winter Weather Advisory	BIS	17 hr
Mar 20, 1:20 PM MDT	Winter Weather Advisory	BIS	35 hr
Mar 23, 5:42 AM MDT	Dense Fog Advisory	BIS	5 hr
Mar 24, 10:53 PM MDT	Dense Fog Advisory	BIS	12 hr
Mar 26, 2:48 AM MDT	Dense Fog Advisory	BIS	8 hr
Apr 2, 2:22 AM MDT	Winter Storm Watch	BIS	33 hr
Apr 3, 3:05 AM MDT	Blizzard Warning	BIS	68 hr
Apr 3, 10:52 AM MDT	Winter Weather Advisory	BIS	54 hr
Apr 12, 9:57 AM MDT	Areal Flood Warning	BIS	28 hr
Apr 13, 1:50 PM MDT	Areal Flood Warning	BIS	22 hr
Apr 14, 11:53 AM MDT	Areal Flood Warning	BIS	6 days
Apr 18, 1:45 PM MDT	Wind Advisory	BIS	29 hr
Apr 20, 2:10 AM MDT	Wind Advisory	BIS	22 hr
Apr 27, 2:03 AM MDT	Wind Advisory	BIS	17 hr
Apr 28, 1:38 PM MDT	Fire Weather Watch	BIS	13 hr
Apr 29, 2:59 AM MDT	Red Flag Warning	BIS	17 hr
May 18, 1:39 PM MDT	Frost Advisory	BIS	18 hr
May 23, 5:48 PM MDT	Special Weather Statement	BIS	27 min
May 23, 6:04 PM MDT	Special Weather Statement	BIS	26 min
May 23, 6:27 PM MDT	Special Weather Statement	BIS	33 min
Jun 20, 2:14 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 20, 3:52 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 20, 5:30 PM MDT	Severe Thunderstorm Warning	BIS	35 min
Jun 20, 7:40 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 7:18 PM MDT	Special Weather Statement	BIS	27 min
Jun 21, 7:34 PM MDT	Severe Thunderstorm Warning	BIS	56 min
Jul 26, 3:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	42 min
Jul 30, 4:52 AM MDT	Special Weather Statement	BIS	38 min
Jul 30, 5:11 AM MDT	Severe Thunderstorm Warning	BIS	49 min
Jul 30, 6:09 AM MDT	Severe Thunderstorm Warning	BIS	51 min
Jul 30, 7:38 AM MDT	Areal Flood Advisory	BIS	3 hr
Jul 30, 8:02 AM MDT	Severe Thunderstorm Warning	BIS	73 min
Aug 1, 2:12 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 1, 2:52 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 1, 4:44 PM MDT	Mesoscale Discussion	SPC	91 min
Aug 1, 5:05 PM MDT	Mesoscale Discussion	SPC	85 min
Aug 1, 6:55 PM MDT	Mesoscale Discussion	SPC	95 min
Aug 1, 8:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	78 min
Aug 1, 9:24 PM MDT	Severe Thunderstorm Warning	BIS	56 min
Aug 9, 2:59 PM MDT	Mesoscale Discussion	SPC	3 hr
Aug 17, 1:25 PM MDT	Heat Advisory	BIS	30 hr
Aug 22, 4:17 AM MDT	Dense Fog Advisory	BIS	6 hr
Aug 24, 2:41 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 4, 3:52 PM MDT	Mesoscale Discussion	SPC	113 min
Sep 4, 4:25 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 4, 5:34 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	56 min
Sep 4, 6:05 PM MDT	Mesoscale Discussion	SPC	85 min
Sep 4, 6:21 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	54 min
Sep 4, 7:06 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BIS	54 min
Sep 12, 5:42 AM MDT	Dense Fog Advisory	BIS	4 hr
Oct 1, 3:41 AM MDT	Dense Fog Advisory	BIS	7 hr
Oct 4, 1:15 PM MDT	Freeze Watch	BIS	24 hr
Oct 5, 12:22 PM MDT	Wind Advisory	BIS	21 hr
Oct 5, 1:31 PM MDT	Freeze Warning	BIS	19 hr
Oct 6, 9:03 AM MDT	Freeze Warning	BIS	23 hr
Oct 15, 5:41 AM MDT	Dense Fog Advisory	BIS	4 hr
Oct 17, 4:15 PM MDT	High Wind Warning	BIS	3 hr
Oct 23, 10:34 AM MDT	Winter Storm Watch	BIS	49 hr
Oct 24, 3:17 PM MDT	Winter Storm Warning	BIS	61 hr
Oct 30, 10:25 AM MDT	Wind Advisory	BIS	11 hr
Nov 2, 3:11 AM MDT	Dense Fog Advisory	BIS	10 hr
Nov 4, 2:31 PM MDT	Dense Fog Advisory	BIS	14 hr
Nov 7, 12:20 AM MST	Dense Fog Advisory	BIS	11 hr
Nov 8, 12:45 AM MST	Wind Advisory	BIS	16 hr
Nov 15, 1:23 PM MST	Wind Advisory	BIS	28 hr
Nov 25, 2:42 AM MST	Wind Advisory	BIS	32 hr
Dec 3, 12:44 PM MST	Wind Advisory	BIS	28 hr
Dec 7, 3:23 AM MST	Wind Advisory	BIS	32 hr
Dec 7, 3:25 AM MST	Winter Weather Advisory	BIS	56 hr
Dec 24, 1:20 PM MST	Winter Weather Advisory	BIS	58 hr
Dec 30, 11:07 PM MST	Dense Fog Advisory	BIS	13 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	11
Severe Thunderstorm Watch	3
Mesoscale Discussion	10
Special Weather Statement	5
Flooding
Areal Flood Warning	3
Areal Flood Advisory	1
Winter
Blizzard Warning	2
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	14
Heat
Heat Advisory	1
Cold
Freeze Warning	2
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
Wind Advisory	12
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	18

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2022 2024

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.