Alert archive / North Dakota / Grant County

Weather alerts in Grant County, North Dakota, 2015

154 weather alerts in 2015, 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 2015. Tap one for its archive.

Alerts: 154
Warnings: 41
Watches: 28
Advisories: 46
Busiest month: July36 alerts
Busiest day: June 22, 20156 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 2015 had a tornado report inside them.

Grant County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	17	10	41%	11	64%	25 min
Flash flood warnings	0			0

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	15	1	93%	7	14%	4 min
NWS Bismarck, ND: severe thunderstorm warnings	183	122	33%	264	77%	26 min
NWS Bismarck, ND: flash flood warnings	4	2	50%	2	100%	26 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 3, 5:30 AM MST	Wind Chill Advisory	BIS	54 hr
Jan 4, 12:34 PM MST	Winter Weather Advisory	BIS	26 hr
Jan 5, 2:42 PM MST	Wind Chill Advisory	BIS	32 hr
Jan 6, 2:24 AM MST	Wind Chill Warning	BIS	33 hr
Jan 7, 2:55 PM MST	Winter Weather Advisory	BIS	26 hr
Jan 8, 1:41 PM MST	Wind Chill Advisory	BIS	21 hr
Jan 16, 1:33 PM MST	Wind Advisory	BIS	22 hr
Feb 7, 2:12 PM MST	Freezing Rain Advisory	BIS	23 hr
Feb 8, 1:53 PM MST	Dense Fog Advisory	BIS	31 hr
Feb 9, 2:38 AM MST	Freezing Rain Advisory	BIS	29 hr
Feb 9, 9:48 PM MST	Mesoscale Discussion	SPC	3 hr
Feb 10, 1:55 AM MST	Wind Advisory	BIS	21 hr
Feb 20, 4:50 PM MST	Wind Chill Advisory	BIS	60 hr
Feb 25, 2:34 AM MST	Wind Chill Advisory	BIS	32 hr
Mar 2, 1:25 PM MST	Wind Advisory	BIS	28 hr
Mar 3, 1:56 PM MST	Wind Chill Advisory	BIS	21 hr
Mar 13, 1:48 PM MDT	Fire Weather Watch	BIS	13 hr
Mar 14, 2:55 AM MDT	Fire Weather Watch	BIS	24 hr
Mar 14, 2:55 AM MDT	Red Flag Warning	BIS	16 hr
Mar 22, 4:17 AM MDT	Freezing Rain Advisory	BIS	6 hr
Mar 28, 2:59 AM MDT	High Wind Warning	BIS	29 hr
Mar 28, 12:57 PM MDT	Mesoscale Discussion	SPC	48 min
Mar 28, 6:14 PM MDT	Severe Thunderstorm Warning	BIS	46 min
Mar 28, 6:16 PM MDT	Mesoscale Discussion	SPC	89 min
Mar 28, 6:27 PM MDT	Severe Thunderstorm Warning	BIS	48 min
Mar 28, 6:58 PM MDT	Severe Thunderstorm Warning	BIS	47 min
Mar 30, 2:31 PM MDT	Fire Weather Watch	BIS	12 hr
Mar 31, 2:56 AM MDT	Fire Weather Watch	BIS	11 hr
Mar 31, 2:56 AM MDT	Red Flag Warning	BIS	17 hr
Mar 31, 2:25 PM MDT	Red Flag Warning	BIS	30 hr
Mar 31, 2:46 PM MDT	Wind Advisory	BIS	28 hr
Apr 1, 2:40 PM MDT	Fire Weather Watch	BIS	12 hr
Apr 2, 2:39 AM MDT	Red Flag Warning	BIS	15 hr
Apr 2, 5:35 AM MDT	Wind Advisory	BIS	12 hr
Apr 11, 3:13 AM MDT	Red Flag Warning	BIS	15 hr
Apr 11, 2:47 PM MDT	Fire Weather Watch	BIS	12 hr
Apr 12, 2:58 AM MDT	Red Flag Warning	BIS	18 hr
Apr 12, 11:59 AM MDT	Fire Weather Watch	BIS	15 hr
Apr 13, 2:59 AM MDT	Fire Weather Watch	BIS	17 hr
Apr 13, 2:59 AM MDT	Red Flag Warning	BIS	16 hr
Apr 13, 7:58 PM MDT	Red Flag Warning	BIS	25 hr
Apr 15, 2:23 AM MDT	Wind Advisory	BIS	16 hr
Apr 15, 2:47 AM MDT	Red Flag Warning	BIS	16 hr
Apr 19, 1:33 PM MDT	Red Flag Warning	BIS	31 hr
May 1, 1:51 PM MDT	Fire Weather Watch	BIS	12 hr
May 2, 2:10 AM MDT	Red Flag Warning	BIS	17 hr
May 7, 1:58 PM MDT	Frost Advisory	BIS	17 hr
May 9, 3:25 AM MDT	Winter Storm Warning	BIS	51 hr
May 11, 2:37 PM MDT	Frost Advisory	BIS	17 hr
May 16, 8:18 PM MDT	Areal Flood Advisory	BIS	3 hr
May 17, 3:23 AM MDT	Wind Advisory	BIS	27 hr
May 17, 1:54 PM MDT	Freeze Warning	BIS	19 hr
May 18, 3:00 AM MDT	Freeze Warning	BIS	29 hr
May 19, 2:01 PM MDT	Frost Advisory	BIS	18 hr
May 27, 6:52 PM MDT	Special Weather Statement	BIS	38 min
May 29, 1:56 PM MDT	Frost Advisory	BIS	18 hr
Jun 2, 1:46 PM MDT	Tornado Watch	SPC	7 hr
Jun 2, 5:22 PM MDT	Mesoscale Discussion	SPC	113 min
Jun 14, 1:59 AM MDT	Areal Flood Advisory	BIS	6 hr
Jun 19, 2:01 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 19, 4:48 PM MDT	Mesoscale Discussion	SPC	57 min
Jun 19, 10:16 PM MDT	Special Weather Statement	BIS	44 min
Jun 21, 2:23 PM MDT	Tornado Watch	SPC	8 hr
Jun 21, 4:24 PM MDT	Mesoscale Discussion	SPC	66 min
Jun 21, 6:58 PM MDT	Tornado Warning	BIS	32 min
Jun 21, 7:32 PM MDT	Severe Thunderstorm Warning	BIS	58 min
Jun 21, 7:32 PM MDT	Mesoscale Discussion	SPC	88 min
Jun 21, 9:41 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 21, 10:25 PM MDT	Mesoscale Discussion	SPC	95 min
Jun 21, 11:11 PM MDT	Special Weather Statement	BIS	34 min
Jun 23, 6:21 PM MDT	Special Weather Statement	BIS	24 min
Jun 23, 6:43 PM MDT	Special Weather Statement	BIS	32 min
Jun 23, 6:57 PM MDT	Severe Thunderstorm Warning	BIS	46 min
Jun 24, 7:35 PM MDT	Mesoscale Discussion	SPC	115 min
Jun 30, 4:29 PM MDT	Tornado Watch	SPC	7 hr
Jun 30, 9:37 PM MDT	Severe Thunderstorm Warning	BIS	38 min
Jun 30, 10:17 PM MDT	Severe Thunderstorm Warning	BIS	58 min
Jul 2, 1:34 AM MDT	Special Weather Statement	BIS	26 min
Jul 2, 1:58 AM MDT	Special Weather Statement	BIS	32 min
Jul 4, 5:49 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 11, 4:40 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 11, 8:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jul 15, 2:49 PM MDT	Special Weather Statement	BIS	26 min
Jul 15, 3:21 PM MDT	Special Weather Statement	BIS	24 min
Jul 15, 3:51 PM MDT	Special Weather Statement	BIS	24 min
Jul 15, 4:09 PM MDT	Severe Thunderstorm Warning	BIS	51 min
Jul 15, 4:50 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Jul 15, 5:18 PM MDT	Severe Thunderstorm Warning	BIS	57 min
Jul 15, 6:06 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 6:46 PM MDT	Areal Flood Advisory	BIS	3 hr
Jul 15, 6:47 PM MDT	Special Weather Statement	BIS	28 min
Jul 15, 7:14 PM MDT	Special Weather Statement	BIS	31 min
Jul 16, 1:03 AM MDT	Areal Flood Advisory	BIS	8 hr
Jul 23, 12:34 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 23, 2:58 PM MDT	Severe Thunderstorm Watch	SPC	11 hr
Jul 23, 5:21 PM MDT	Mesoscale Discussion	SPC	24 min
Jul 23, 6:04 PM MDT	Severe Thunderstorm Warning	BIS	56 min
Jul 25, 3:30 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 26, 2:42 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 26, 5:23 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 26, 6:59 PM MDT	Special Weather Statement	BIS	61 min
Jul 26, 8:53 PM MDT	Special Weather Statement	BIS	37 min
Jul 27, 2:40 AM MDT	High Wind Watch	BIS	23 hr
Jul 27, 3:44 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 27, 5:51 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 6:31 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 27, 7:44 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jul 27, 8:19 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 27, 8:39 PM MDT	Severe Thunderstorm Warning	BIS	51 min
Jul 27, 9:27 PM MDT	Severe Thunderstorm Warning	BIS	48 min
Jul 28, 1:33 AM MDT	High Wind Warning	BIS	22 hr
Aug 5, 2:57 AM MDT	Special Weather Statement	BIS	48 min
Aug 5, 3:46 AM MDT	Special Weather Statement	BIS	44 min
Aug 5, 5:16 AM MDT	Special Weather Statement	BIS	44 min
Aug 5, 9:02 AM MDT	Areal Flood Advisory	BIS	3 hr
Aug 5, 1:52 PM MDT	Flash Flood Watch	BIS	29 hr
Aug 12, 3:36 PM MDT	Special Weather Statement	BIS	24 min
Aug 12, 3:45 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Aug 12, 4:45 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Aug 14, 6:56 PM MDT	Heat Advisory	BIS	25 hr
Aug 21, 12:42 PM MDT	High Wind Warning	BIS	35 hr
Aug 21, 12:42 PM MDT	Wind Advisory	BIS	53 hr
Aug 28, 1:55 PM MDT	Fire Weather Watch	BIS	13 hr
Sep 5, 6:00 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Sep 5, 10:25 PM MDT	Mesoscale Discussion	SPC	95 min
Sep 10, 12:59 PM MDT	Frost Advisory	BIS	19 hr
Sep 24, 2:31 AM MDT	Dense Fog Advisory	BIS	8 hr
Sep 25, 1:52 AM MDT	Dense Fog Advisory	BIS	8 hr
Sep 30, 6:33 PM MDT	Severe Thunderstorm Warning	BIS	57 min
Sep 30, 8:12 PM MDT	Special Weather Statement	BIS	48 min
Oct 10, 10:10 AM MDT	High Wind Watch	BIS	17 hr
Oct 10, 1:19 PM MDT	Fire Weather Watch	BIS	14 hr
Oct 11, 2:48 AM MDT	High Wind Warning	BIS	35 hr
Oct 11, 2:49 AM MDT	Red Flag Warning	BIS	17 hr
Oct 15, 2:33 AM MDT	Freeze Warning	BIS	30 hr
Oct 28, 2:44 AM MDT	Wind Advisory	BIS	15 hr
Oct 31, 2:46 AM MDT	Wind Advisory	BIS	15 hr
Nov 9, 11:45 PM MST	Dense Fog Advisory	BIS	11 hr
Nov 10, 1:47 PM MST	High Wind Watch	BIS	24 hr
Nov 11, 1:48 PM MST	Wind Advisory	BIS	27 hr
Nov 16, 6:32 AM MST	Dense Fog Advisory	BIS	4 hr
Nov 16, 1:46 PM MST	Fire Weather Watch	BIS	30 hr
Nov 16, 1:49 PM MST	High Wind Watch	BIS	30 hr
Nov 17, 3:44 AM MST	High Wind Warning	BIS	55 hr
Nov 17, 8:14 PM MST	Red Flag Warning	BIS	23 hr
Nov 19, 2:33 AM MST	Wind Advisory	BIS	14 hr
Nov 29, 2:23 PM MST	Winter Weather Advisory	BIS	48 hr
Dec 9, 3:17 AM MST	Wind Advisory	BIS	35 hr
Dec 12, 2:36 PM MST	Dense Fog Advisory	BIS	23 hr
Dec 13, 2:02 PM MST	Dense Fog Advisory	BIS	20 hr
Dec 14, 3:25 AM MST	Winter Storm Watch	BIS	23 hr
Dec 14, 2:31 PM MST	Winter Weather Advisory	BIS	50 hr
Dec 20, 7:05 PM MST	Dense Fog Advisory	BIS	16 hr
Dec 25, 5:33 AM MST	Dense Fog Advisory	BIS	4 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	17
Tornado Warning	1
Severe Thunderstorm Watch	7
Tornado Watch	3
Mesoscale Discussion	20
Special Weather Statement	19
Flooding
Flash Flood Watch	1
Areal Flood Advisory	5
Winter
Winter Storm Warning	1
Winter Storm Watch	1
Freezing Rain Advisory	3
Winter Weather Advisory	4
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Wind Chill Warning	1
Frost Advisory	5
Wind Chill Advisory	6
Wind and dust
High Wind Warning	5
High Wind Watch	4
Wind Advisory	13
Fire
Red Flag Warning	13
Fire Weather Watch	12
Fog and smoke
Dense Fog Advisory	9

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.