Alert archive / North Dakota / Grant County

Weather alerts in Grant County, North Dakota, 2018

172 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts: 172
Warnings: 54
Watches: 18
Advisories: 45
Busiest month: June49 alerts
Busiest day: June 1, 201815 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 Grant County in 2018 had a tornado report inside them.

Grant County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	43	22	49%	20	95%	24 min
Flash flood warnings	0			0

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	24	5	79%	22	64%	9 min
NWS Bismarck, ND: severe thunderstorm warnings	275	164	40%	315	90%	28 min
NWS Bismarck, ND: flash flood warnings	7	4	43%	7	71%	119 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 10:59 AM MST	Wind Chill Advisory	BIS	22 hr
Jan 9, 3:10 AM MST	Winter Weather Advisory	BIS	53 hr
Jan 10, 11:01 PM MST	Wind Chill Advisory	BIS	60 hr
Jan 14, 1:42 AM MST	Wind Chill Advisory	BIS	57 hr
Jan 14, 2:26 PM MST	Wind Chill Warning	BIS	44 hr
Jan 21, 12:46 PM MST	Dense Fog Advisory	BIS	22 hr
Jan 22, 2:08 PM MST	Dense Fog Advisory	BIS	20 hr
Jan 29, 1:26 PM MST	Wind Advisory	BIS	29 hr
Feb 3, 2:18 AM MST	Wind Chill Advisory	BIS	33 hr
Feb 5, 2:52 AM MST	Wind Chill Advisory	BIS	29 hr
Feb 7, 2:23 PM MST	Winter Weather Advisory	BIS	33 hr
Feb 9, 1:59 PM MST	Wind Chill Advisory	BIS	21 hr
Feb 11, 2:43 PM MST	Wind Chill Advisory	BIS	20 hr
Feb 18, 1:56 PM MST	Winter Weather Advisory	BIS	37 hr
Feb 20, 2:07 PM MST	Wind Chill Advisory	BIS	19 hr
Mar 2, 3:22 AM MST	Winter Storm Watch	BIS	59 hr
Mar 3, 2:41 PM MST	Dense Fog Advisory	BIS	20 hr
Mar 3, 3:07 PM MST	Winter Storm Warning	BIS	65 hr
Mar 4, 3:37 AM MST	Blizzard Warning	BIS	47 hr
Mar 18, 2:37 AM MDT	Winter Weather Advisory	BIS	33 hr
Mar 21, 11:23 PM MDT	Dense Fog Advisory	BIS	14 hr
Mar 22, 2:51 AM MDT	Winter Weather Advisory	BIS	55 hr
Mar 30, 12:07 PM MDT	Wind Advisory	BIS	15 hr
Apr 1, 1:07 PM MDT	Winter Weather Advisory	BIS	41 hr
Apr 6, 2:18 PM MDT	Winter Weather Advisory	BIS	52 hr
Apr 10, 2:09 PM MDT	Winter Storm Watch	BIS	37 hr
Apr 12, 2:41 AM MDT	Winter Weather Advisory	BIS	33 hr
Apr 28, 2:40 AM MDT	Red Flag Warning	BIS	17 hr
Apr 29, 9:57 PM MDT	Special Weather Statement	BIS	48 min
May 4, 3:01 AM MDT	Red Flag Warning	BIS	15 hr
May 7, 4:14 PM MDT	Special Weather Statement	BIS	31 min
May 7, 4:44 PM MDT	Special Weather Statement	BIS	46 min
May 7, 5:02 PM MDT	Special Weather Statement	BIS	28 min
May 7, 5:10 PM MDT	Severe Thunderstorm Warning	BIS	39 min
May 7, 5:53 PM MDT	Special Weather Statement	BIS	37 min
May 17, 4:27 PM MDT	Severe Thunderstorm Warning	BIS	36 min
May 17, 4:54 PM MDT	Mesoscale Discussion	SPC	66 min
May 19, 2:48 PM MDT	Frost Advisory	BIS	17 hr
May 22, 4:39 PM MDT	Special Weather Statement	BIS	36 min
May 22, 4:47 PM MDT	Severe Thunderstorm Warning	BIS	58 min
May 22, 4:56 PM MDT	Mesoscale Discussion	SPC	2 hr
May 22, 5:33 PM MDT	Severe Thunderstorm Warning	BIS	57 min
May 27, 12:29 AM MDT	Mesoscale Discussion	SPC	3 hr
May 27, 3:05 AM MDT	Special Weather Statement	BIS	25 min
May 31, 1:47 PM MDT	Mesoscale Discussion	SPC	118 min
May 31, 2:17 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 31, 5:43 PM MDT	Severe Thunderstorm Warning	BIS	62 min
May 31, 6:00 PM MDT	Mesoscale Discussion	SPC	90 min
May 31, 6:42 PM MDT	Severe Thunderstorm Warning	BIS	63 min
May 31, 7:32 PM MDT	Severe Thunderstorm Warning	BIS	58 min
May 31, 7:48 PM MDT	Severe Thunderstorm Warning	BIS	27 min
May 31, 8:18 PM MDT	Mesoscale Discussion	SPC	57 min
May 31, 8:40 PM MDT	Special Weather Statement	BIS	50 min
May 31, 8:58 PM MDT	Special Weather Statement	BIS	47 min
Jun 1, 1:03 AM MDT	Special Weather Statement	BIS	42 min
Jun 1, 1:13 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 1, 2:30 PM MDT	Tornado Watch	SPC	6 hr
Jun 1, 4:22 PM MDT	Severe Thunderstorm Warning	BIS	38 min
Jun 1, 4:57 PM MDT	Tornado Warning	BIS	33 min
Jun 1, 5:02 PM MDT	Mesoscale Discussion	SPC	88 min
Jun 1, 5:07 PM MDT	Severe Thunderstorm Warning	BIS	38 min
Jun 1, 5:14 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jun 2, 2:10 AM MDT	Wind Advisory	BIS	18 hr
Jun 5, 5:01 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 5, 8:07 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 5, 8:16 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Jun 5, 8:34 PM MDT	Special Weather Statement	BIS	26 min
Jun 7, 9:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 10, 1:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 2:37 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 10, 5:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 7:21 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Jun 10, 7:29 PM MDT	Severe Thunderstorm Warning	BIS	46 min
Jun 10, 8:02 PM MDT	Mesoscale Discussion	SPC	118 min
Jun 14, 1:58 PM MDT	Mesoscale Discussion	SPC	62 min
Jun 14, 2:40 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 14, 5:15 PM MDT	Mesoscale Discussion	SPC	90 min
Jun 16, 9:56 AM MDT	Severe Thunderstorm Warning	BIS	52 min
Jun 22, 4:08 PM MDT	Special Weather Statement	BIS	37 min
Jun 26, 3:00 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 26, 8:05 PM MDT	Mesoscale Discussion	SPC	115 min
Jun 26, 9:51 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Jun 26, 10:23 PM MDT	Severe Thunderstorm Warning	BIS	67 min
Jun 28, 2:52 AM MDT	Mesoscale Discussion	SPC	83 min
Jun 28, 6:40 AM MDT	Mesoscale Discussion	SPC	3 hr
Jun 28, 7:00 AM MDT	Severe Thunderstorm Warning	BIS	60 min
Jun 28, 7:56 AM MDT	Severe Thunderstorm Warning	BIS	64 min
Jun 28, 9:37 AM MDT	Severe Thunderstorm Warning	BIS	53 min
Jun 28, 2:16 PM MDT	Tornado Watch	SPC	8 hr
Jun 28, 5:59 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 28, 8:06 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 28, 9:21 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 28, 9:54 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 28, 11:17 PM MDT	Severe Thunderstorm Warning	BIS	58 min
Jun 29, 12:14 AM MDT	Severe Thunderstorm Warning	BIS	61 min
Jun 29, 1:02 AM MDT	Mesoscale Discussion	SPC	118 min
Jul 2, 4:23 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 6:36 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 2, 7:06 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Jul 2, 7:53 PM MDT	Severe Thunderstorm Warning	BIS	67 min
Jul 2, 8:50 PM MDT	Mesoscale Discussion	SPC	115 min
Jul 2, 11:01 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 3, 12:59 AM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 2:15 AM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 3, 3:12 AM MDT	Severe Thunderstorm Warning	BIS	63 min
Jul 3, 3:15 AM MDT	Mesoscale Discussion	SPC	90 min
Jul 3, 4:03 AM MDT	Severe Thunderstorm Warning	BIS	57 min
Jul 3, 8:39 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 3, 9:37 PM MDT	Special Weather Statement	BIS	38 min
Jul 3, 9:55 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Jul 3, 10:32 PM MDT	Areal Flood Advisory	BIS	6 hr
Jul 3, 10:49 PM MDT	Severe Thunderstorm Warning	BIS	56 min
Jul 3, 11:49 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 6, 1:38 PM MDT	Heat Advisory	BIS	29 hr
Jul 7, 7:55 PM MDT	Mesoscale Discussion	SPC	65 min
Jul 7, 8:41 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 7, 10:44 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 11:08 PM MDT	Severe Thunderstorm Warning	BIS	67 min
Jul 14, 2:18 PM MDT	Mesoscale Discussion	SPC	117 min
Jul 14, 3:14 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 14, 4:48 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 14, 5:28 PM MDT	Severe Thunderstorm Warning	BIS	62 min
Jul 14, 6:45 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 19, 2:43 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 5:18 PM MDT	Special Weather Statement	BIS	42 min
Jul 19, 5:56 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Jul 19, 6:09 PM MDT	Severe Thunderstorm Warning	BIS	66 min
Jul 19, 7:22 PM MDT	Special Weather Statement	BIS	53 min
Jul 21, 8:40 PM MDT	Mesoscale Discussion	SPC	65 min
Jul 24, 11:16 PM MDT	Severe Thunderstorm Warning	BIS	33 min
Jul 25, 12:42 AM MDT	Special Weather Statement	BIS	33 min
Jul 25, 1:24 AM MDT	Special Weather Statement	BIS	36 min
Aug 3, 9:11 PM MDT	Severe Thunderstorm Warning	BIS	34 min
Aug 3, 9:46 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Aug 3, 10:20 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Aug 3, 10:47 PM MDT	Severe Thunderstorm Warning	BIS	58 min
Aug 3, 11:49 PM MDT	Special Weather Statement	BIS	71 min
Aug 4, 2:42 PM MDT	Mesoscale Discussion	SPC	93 min
Aug 10, 2:26 PM MDT	Fire Weather Watch	BIS	23 hr
Aug 11, 1:18 PM MDT	Red Flag Warning	BIS	31 hr
Aug 12, 2:13 AM MDT	Heat Advisory	BIS	16 hr
Aug 23, 5:37 PM MDT	Severe Thunderstorm Warning	BIS	53 min
Aug 23, 6:36 PM MDT	Severe Thunderstorm Warning	BIS	38 min
Aug 23, 7:13 PM MDT	Severe Thunderstorm Warning	BIS	62 min
Aug 25, 2:37 AM MDT	Special Weather Statement	BIS	23 min
Sep 3, 4:44 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 3, 7:14 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 3, 9:40 PM MDT	Mesoscale Discussion	SPC	95 min
Sep 6, 7:30 PM MDT	Severe Thunderstorm Warning	BIS	43 min
Sep 23, 4:00 AM MDT	Dense Fog Advisory	BIS	7 hr
Sep 25, 1:06 PM MDT	Frost Advisory	BIS	18 hr
Sep 27, 1:55 AM MDT	Freeze Watch	BIS	12 hr
Sep 27, 1:31 PM MDT	Freeze Warning	BIS	19 hr
Sep 28, 2:09 PM MDT	Freeze Warning	BIS	18 hr
Oct 3, 1:54 AM MDT	Wind Advisory	BIS	16 hr
Oct 4, 2:20 AM MDT	Winter Weather Advisory	BIS	39 hr
Oct 27, 2:49 AM MDT	Wind Advisory	BIS	16 hr
Nov 1, 2:10 PM MDT	Winter Weather Advisory	BIS	42 hr
Nov 5, 8:17 PM MST	Wind Advisory	BIS	21 hr
Nov 15, 2:01 PM MST	Winter Weather Advisory	BIS	29 hr
Nov 16, 2:03 AM MST	Winter Storm Warning	BIS	17 hr
Nov 20, 7:52 PM MST	Dense Fog Advisory	BIS	14 hr
Nov 21, 1:04 PM MST	Dense Fog Advisory	BIS	22 hr
Nov 27, 2:13 AM MST	Winter Weather Advisory	BIS	45 hr
Nov 29, 2:36 AM MST	Dense Fog Advisory	BIS	9 hr
Nov 29, 5:31 PM MST	Dense Fog Advisory	BIS	20 hr
Nov 30, 3:07 AM MST	Winter Weather Advisory	BIS	38 hr
Dec 1, 1:59 PM MST	Dense Fog Advisory	BIS	19 hr
Dec 18, 1:26 PM MST	Wind Advisory	BIS	27 hr
Dec 25, 3:04 AM MST	Winter Weather Advisory	BIS	55 hr
Dec 25, 1:38 PM MST	Winter Storm Warning	BIS	51 hr
Dec 30, 1:58 PM MST	Wind Chill Advisory	BIS	43 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	43
Tornado Warning	1
Severe Thunderstorm Watch	12
Tornado Watch	2
Mesoscale Discussion	36
Special Weather Statement	19
Flooding
Areal Flood Advisory	1
Winter
Blizzard Warning	1
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	14
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Wind Chill Warning	1
Freeze Watch	1
Frost Advisory	2
Wind Chill Advisory	9
Wind and dust
Wind Advisory	7
Fire
Red Flag Warning	3
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	10

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.