Alert archive / North Dakota / Grant County

Weather alerts in Grant County, North Dakota, 2017

108 weather alerts in 2017, 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 2017. Tap one for its archive.

Alerts: 108
Warnings: 29
Watches: 9
Advisories: 42
Busiest month: July38 alerts
Busiest day: July 19, 20178 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, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	16	11	31%	9	100%	33 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 3:21 AM MST	Winter Storm Warning	BIS	50 hr
Jan 1, 3:21 AM MST	Winter Weather Advisory	BIS	38 hr
Jan 2, 3:52 PM MST	Wind Chill Advisory	BIS	22 hr
Jan 3, 2:06 PM MST	Wind Chill Warning	BIS	21 hr
Jan 4, 11:07 AM MST	Wind Chill Advisory	BIS	46 hr
Jan 6, 2:23 PM MST	Wind Chill Advisory	BIS	21 hr
Jan 7, 2:37 PM MST	Wind Chill Advisory	BIS	17 hr
Jan 10, 1:46 PM MST	Wind Chill Advisory	BIS	65 hr
Jan 11, 1:24 PM MST	Winter Weather Advisory	BIS	24 hr
Jan 27, 10:03 AM MST	Wind Advisory	BIS	7 hr
Jan 29, 2:07 AM MST	High Wind Watch	BIS	266 days
Jan 29, 10:24 PM MST	High Wind Warning	BIS	15 hr
Jan 30, 1:17 PM MST	Wind Advisory	BIS	4 hr
Feb 7, 2:19 PM MST	Wind Chill Advisory	BIS	42 hr
Mar 5, 1:44 AM MST	High Wind Watch	BIS	234 days
Mar 5, 2:54 PM MST	Winter Weather Advisory	BIS	65 hr
Mar 5, 3:01 PM MST	High Wind Warning	BIS	53 hr
Mar 7, 7:40 PM MST	Wind Advisory	BIS	12 hr
Mar 10, 3:14 AM MST	Winter Weather Advisory	BIS	29 hr
Mar 11, 2:55 PM MST	Winter Weather Advisory	BIS	30 hr
Mar 12, 6:14 PM MDT	Winter Weather Advisory	BIS	3 hr
Apr 17, 10:37 PM MDT	Special Weather Statement	BIS	23 min
Apr 21, 4:21 AM MDT	Dense Fog Advisory	BIS	6 hr
May 17, 1:38 PM MDT	Frost Advisory	BIS	18 hr
May 18, 1:44 PM MDT	Frost Advisory	BIS	18 hr
May 19, 1:59 PM MDT	Freeze Warning	BIS	12 hr
May 20, 2:33 PM MDT	Frost Advisory	BIS	16 hr
May 22, 8:24 PM MDT	Frost Advisory	BIS	11 hr
May 23, 2:04 PM MDT	Frost Advisory	BIS	17 hr
May 29, 11:47 AM MDT	Frost Advisory	BIS	20 hr
Jun 22, 2:59 AM MDT	Wind Advisory	BIS	18 hr
Jun 27, 6:50 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Jul 4, 2:35 PM MDT	Special Weather Statement	BIS	40 min
Jul 5, 2:09 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 2:53 PM MDT	Severe Thunderstorm Warning	BIS	67 min
Jul 5, 3:40 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Jul 5, 4:52 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 8, 2:13 AM MDT	Fire Weather Watch	BIS	24 hr
Jul 9, 2:41 AM MDT	Red Flag Warning	BIS	17 hr
Jul 14, 3:01 AM MDT	Heat Advisory	BIS	16 hr
Jul 14, 1:51 PM MDT	Fire Weather Watch	BIS	22 hr
Jul 14, 2:03 PM MDT	Mesoscale Discussion	SPC	57 min
Jul 14, 5:11 PM MDT	Special Weather Statement	BIS	49 min
Jul 15, 11:52 AM MDT	Red Flag Warning	BIS	32 hr
Jul 17, 11:54 PM MDT	Special Weather Statement	BIS	36 min
Jul 19, 4:20 AM MDT	Special Weather Statement	BIS	25 min
Jul 19, 4:45 AM MDT	Special Weather Statement	BIS	45 min
Jul 19, 5:25 AM MDT	Special Weather Statement	BIS	50 min
Jul 19, 5:49 AM MDT	Severe Thunderstorm Warning	BIS	56 min
Jul 19, 6:01 AM MDT	Mesoscale Discussion	SPC	119 min
Jul 19, 6:43 AM MDT	Severe Thunderstorm Warning	BIS	49 min
Jul 19, 8:30 AM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 19, 9:32 AM MDT	Special Weather Statement	BIS	28 min
Jul 20, 2:32 PM MDT	Mesoscale Discussion	SPC	58 min
Jul 20, 2:50 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 20, 5:01 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Jul 20, 5:29 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jul 20, 6:17 PM MDT	Severe Thunderstorm Warning	BIS	58 min
Jul 20, 6:31 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 21, 2:44 AM MDT	Fire Weather Watch	BIS	25 hr
Jul 21, 2:07 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 21, 5:09 PM MDT	Special Weather Statement	BIS	21 min
Jul 21, 5:28 PM MDT	Special Weather Statement	BIS	17 min
Jul 21, 5:43 PM MDT	Severe Thunderstorm Warning	BIS	62 min
Jul 21, 6:46 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 22, 3:22 AM MDT	Red Flag Warning	BIS	17 hr
Jul 29, 10:22 PM MDT	Special Weather Statement	BIS	38 min
Jul 31, 2:06 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Jul 31, 2:43 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 31, 2:51 PM MDT	Severe Thunderstorm Warning	BIS	38 min
Aug 1, 2:50 AM MDT	Special Weather Statement	BIS	40 min
Aug 1, 4:05 AM MDT	Special Weather Statement	BIS	40 min
Aug 8, 2:00 PM MDT	Special Weather Statement	BIS	45 min
Aug 8, 2:49 PM MDT	Special Weather Statement	BIS	41 min
Aug 8, 3:31 PM MDT	Special Weather Statement	BIS	44 min
Aug 12, 4:36 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Aug 12, 4:46 PM MDT	Mesoscale Discussion	SPC	89 min
Aug 12, 5:25 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Aug 16, 1:26 AM MDT	Dense Fog Advisory	BIS	8 hr
Aug 25, 11:19 PM MDT	Dense Fog Advisory	BIS	10 hr
Aug 26, 3:11 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Aug 26, 3:50 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Aug 26, 4:56 PM MDT	Special Weather Statement	BIS	49 min
Aug 26, 7:15 PM MDT	Special Weather Statement	BIS	45 min
Aug 27, 5:04 AM MDT	Dense Fog Advisory	BIS	5 hr
Sep 1, 1:56 PM MDT	Fire Weather Watch	BIS	24 hr
Sep 2, 1:55 PM MDT	Red Flag Warning	BIS	30 hr
Sep 13, 10:07 PM MDT	Special Weather Statement	BIS	23 min
Sep 16, 2:23 PM MDT	Frost Advisory	BIS	18 hr
Oct 6, 1:19 PM MDT	Fire Weather Watch	BIS	29 hr
Oct 6, 1:31 PM MDT	Wind Advisory	BIS	26 hr
Oct 8, 1:48 PM MDT	Freeze Warning	BIS	18 hr
Oct 9, 8:45 AM MDT	Freeze Warning	BIS	23 hr
Oct 22, 3:00 PM MDT	Wind Advisory	BIS	27 hr
Oct 25, 2:36 PM MDT	Wind Advisory	BIS	27 hr
Oct 29, 1:58 AM MDT	Wind Advisory	BIS	38 hr
Nov 2, 1:35 PM MDT	Winter Weather Advisory	BIS	47 hr
Nov 23, 1:39 PM MST	Wind Advisory	BIS	19 hr
Nov 29, 2:43 AM MST	Wind Advisory	BIS	18 hr
Dec 3, 1:07 PM MST	Winter Weather Advisory	BIS	28 hr
Dec 4, 9:34 AM MST	Wind Advisory	BIS	7 hr
Dec 10, 8:39 PM MST	Wind Advisory	BIS	13 hr
Dec 12, 2:08 PM MST	Wind Advisory	BIS	21 hr
Dec 24, 2:57 AM MST	Wind Chill Warning	BIS	57 hr
Dec 24, 2:57 AM MST	Wind Chill Advisory	BIS	40 hr
Dec 26, 11:49 AM MST	Wind Chill Advisory	BIS	23 hr
Dec 27, 2:45 PM MST	Wind Chill Advisory	BIS	50 hr
Dec 29, 4:15 AM MST	Wind Chill Warning	BIS	3 days

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
Severe Thunderstorm Watch	2
Mesoscale Discussion	9
Special Weather Statement	19
Winter
Winter Storm Warning	1
Winter Weather Advisory	8
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Wind Chill Warning	3
Frost Advisory	7
Wind Chill Advisory	9
Wind and dust
High Wind Warning	2
High Wind Watch	2
Wind Advisory	13
Fire
Red Flag Warning	4
Fire Weather Watch	5
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2016 2018

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.