Alert archive / North Dakota / Grant County

Weather alerts in Grant County, North Dakota, 2011

224 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts: 224
Warnings: 85
Watches: 43
Advisories: 65
Busiest month: July55 alerts
Busiest day: July 10, 201112 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 9 tornado warnings covering Grant County in 2011 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.

Grant County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	9	0	100%	2	0%
Severe thunderstorm warnings	48	16	67%	9	78%	15 min
Flash flood warnings	3	2	33%	0

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	93	24	74%	42	67%	18 min
NWS Bismarck, ND: severe thunderstorm warnings	334	147	56%	286	85%	26 min
NWS Bismarck, ND: flash flood warnings	47	13	72%	20	85%	58 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, 2:54 PM MST	Wind Chill Advisory	BIS	12 hr
Jan 7, 2:14 PM MST	Winter Weather Advisory	BIS	51 hr
Jan 10, 2:48 PM MST	Wind Chill Advisory	BIS	20 hr
Jan 11, 2:19 PM MST	Wind Chill Advisory	BIS	21 hr
Jan 13, 2:35 PM MST	Winter Weather Advisory	BIS	37 hr
Jan 16, 12:54 PM MST	Winter Weather Advisory	BIS	18 hr
Jan 18, 2:10 PM MST	Wind Chill Advisory	BIS	18 hr
Jan 19, 2:43 PM MST	Winter Weather Advisory	BIS	16 hr
Jan 23, 3:19 AM MST	Winter Weather Advisory	BIS	32 hr
Jan 29, 2:51 AM MST	Winter Weather Advisory	BIS	57 hr
Jan 29, 3:16 PM MST	Wind Chill Advisory	BIS	72 hr
Jan 31, 2:41 PM MST	Wind Chill Warning	BIS	20 hr
Feb 1, 2:48 PM MST	Wind Chill Warning	BIS	20 hr
Feb 1, 2:48 PM MST	Wind Chill Advisory	BIS	2 hr
Feb 4, 3:40 PM MST	Winter Weather Advisory	BIS	23 hr
Feb 7, 2:32 PM MST	Wind Chill Warning	BIS	20 hr
Feb 8, 2:26 PM MST	Wind Chill Advisory	BIS	21 hr
Feb 12, 3:22 AM MST	High Wind Watch	BIS	11 hr
Feb 12, 2:27 PM MST	High Wind Warning	BIS	30 hr
Feb 16, 3:13 AM MST	Winter Weather Advisory	BIS	48 hr
Feb 16, 2:36 PM MST	Wind Advisory	BIS	22 hr
Feb 17, 2:15 PM MST	Wind Advisory	BIS	9 hr
Feb 18, 3:16 PM MST	Winter Storm Watch	BIS	23 hr
Feb 19, 2:04 PM MST	Winter Storm Warning	BIS	33 hr
Feb 19, 2:04 PM MST	Winter Weather Advisory	BIS	37 hr
Feb 23, 2:24 PM MST	Wind Chill Advisory	BIS	45 hr
Feb 25, 2:14 PM MST	Wind Chill Advisory	BIS	23 hr
Mar 1, 9:20 AM MST	Wind Chill Advisory	BIS	24 hr
Mar 10, 2:48 PM MST	Winter Weather Advisory	BIS	20 hr
Mar 11, 8:43 AM MST	High Wind Warning	BIS	9 hr
Mar 11, 8:53 AM MST	Winter Weather Advisory	BIS	12 hr
Mar 15, 2:12 PM MDT	Flood Watch	BIS	6 days
Mar 17, 11:58 AM MDT	Wind Advisory	BIS	6 hr
Mar 21, 3:57 AM MDT	Winter Storm Warning	BIS	57 hr
Mar 21, 3:57 AM MDT	Winter Weather Advisory	BIS	30 hr
Mar 22, 9:49 AM MDT	Ice Storm Warning	BIS	6 hr
Mar 22, 9:49 AM MDT	Winter Weather Advisory	BIS	6 hr
Mar 22, 11:51 AM MDT	Areal Flood Warning	BIS	6 hr
Mar 31, 2:48 PM MDT	Winter Storm Watch	BIS	37 hr
Apr 2, 3:21 PM MDT	Wind Advisory	BIS	28 hr
Apr 3, 8:38 AM MDT	Areal Flood Advisory	BIS	24 hr
Apr 13, 2:33 PM MDT	Winter Storm Watch	BIS	12 hr
Apr 14, 2:38 AM MDT	Winter Weather Advisory	BIS	39 hr
Apr 16, 3:22 PM MDT	Winter Weather Advisory	BIS	29 hr
Apr 17, 4:32 AM MDT	Winter Storm Watch	BIS	34 hr
Apr 18, 2:57 PM MDT	Winter Storm Warning	BIS	39 hr
Apr 20, 2:06 PM MDT	Flood Watch	BIS	46 hr
Apr 21, 3:09 PM MDT	Winter Weather Advisory	BIS	29 hr
Apr 22, 12:07 PM MDT	Areal Flood Advisory	BIS	69 hr
Apr 29, 3:32 AM MDT	Wind Advisory	BIS	14 hr
Apr 29, 3:23 PM MDT	Blizzard Warning	BIS	41 hr
May 1, 2:50 AM MDT	Wind Advisory	BIS	15 hr
May 8, 5:13 PM MDT	Tornado Watch	SPC	6 hr
May 8, 7:47 PM MDT	Mesoscale Discussion	SPC	58 min
May 9, 9:15 PM MDT	Areal Flood Advisory	BIS	15 hr
May 10, 12:43 AM MDT	Severe Thunderstorm Warning	BIS	62 min
May 10, 12:56 AM MDT	Mesoscale Discussion	SPC	94 min
May 14, 2:09 PM MDT	Frost Advisory	BIS	18 hr
May 15, 2:21 PM MDT	Frost Advisory	BIS	13 hr
May 15, 2:21 PM MDT	Wind Advisory	BIS	30 hr
May 18, 1:34 PM MDT	Flood Watch	BIS	3 days
May 20, 9:45 AM MDT	Areal Flood Advisory	BIS	48 hr
May 22, 1:13 PM MDT	Areal Flood Advisory	BIS	24 hr
May 28, 9:29 AM MDT	Wind Advisory	BIS	9 hr
May 29, 1:53 PM MDT	High Wind Watch	BIS	23 hr
May 30, 12:57 PM MDT	High Wind Warning	BIS	29 hr
May 31, 5:52 PM MDT	Wind Advisory	BIS	3 hr
Jun 2, 6:22 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 2, 7:13 PM MDT	Severe Thunderstorm Warning	BIS	51 min
Jun 3, 2:36 AM MDT	Wind Advisory	BIS	17 hr
Jun 7, 2:50 PM MDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 12, 1:19 PM MDT	Flash Flood Watch	BIS	14 hr
Jun 12, 4:42 PM MDT	Severe Thunderstorm Warning	BIS	63 min
Jun 12, 5:07 PM MDT	Mesoscale Discussion	SPC	53 min
Jun 12, 5:28 PM MDT	Tornado Watch	SPC	6 hr
Jun 12, 6:08 PM MDT	Tornado Warning	BIS	22 min
Jun 12, 6:54 PM MDT	Severe Thunderstorm Warning	BIS	51 min
Jun 12, 7:01 PM MDT	Severe Thunderstorm Warning	BIS	44 min
Jun 12, 7:46 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Jun 12, 8:07 PM MDT	Severe Thunderstorm Warning	BIS	53 min
Jun 12, 8:09 PM MDT	Flash Flood Warning	BIS	4 hr
Jun 12, 8:19 PM MDT	Mesoscale Discussion	SPC	56 min
Jun 12, 8:28 PM MDT	Tornado Warning	BIS	19 min
Jun 12, 8:39 PM MDT	Severe Thunderstorm Warning	BIS	66 min
Jun 12, 9:23 PM MDT	Areal Flood Advisory	BIS	8 hr
Jun 13, 12:18 AM MDT	Areal Flood Warning	BIS	62 hr
Jun 14, 5:38 AM MDT	Severe Thunderstorm Warning	BIS	39 min
Jun 14, 6:14 AM MDT	Severe Thunderstorm Warning	BIS	61 min
Jun 16, 3:21 AM MDT	Flash Flood Watch	BIS	42 hr
Jun 18, 4:20 PM MDT	Severe Thunderstorm Warning	BIS	44 min
Jun 18, 4:26 PM MDT	Tornado Warning	BIS	21 min
Jun 18, 5:02 PM MDT	Tornado Warning	BIS	28 min
Jun 18, 5:26 PM MDT	Flash Flood Warning	BIS	3 hr
Jun 18, 5:35 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Jun 18, 5:40 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Jun 18, 8:35 PM MDT	Areal Flood Warning	BIS	19 hr
Jun 19, 3:12 PM MDT	Flood Watch	BIS	51 hr
Jun 24, 4:57 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 25, 2:22 PM MDT	Flash Flood Watch	BIS	25 hr
Jun 25, 2:24 PM MDT	Mesoscale Discussion	SPC	66 min
Jun 25, 7:01 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 25, 9:00 PM MDT	Severe Thunderstorm Warning	BIS	27 min
Jun 26, 7:45 PM MDT	Severe Thunderstorm Warning	BIS	45 min
Jul 6, 12:25 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 8, 1:13 PM MDT	Mesoscale Discussion	SPC	62 min
Jul 8, 1:32 PM MDT	Tornado Watch	SPC	9 hr
Jul 8, 2:35 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Jul 8, 3:26 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Jul 8, 3:30 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 8, 4:18 PM MDT	Tornado Warning	BIS	42 min
Jul 8, 7:06 PM MDT	Areal Flood Advisory	BIS	11 hr
Jul 10, 9:20 AM MDT	Severe Thunderstorm Warning	BIS	55 min
Jul 10, 9:32 AM MDT	Mesoscale Discussion	SPC	118 min
Jul 10, 10:08 AM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 10, 10:09 AM MDT	Severe Thunderstorm Warning	BIS	66 min
Jul 10, 10:16 AM MDT	Severe Thunderstorm Warning	BIS	59 min
Jul 10, 11:09 AM MDT	Areal Flood Advisory	BIS	6 hr
Jul 10, 11:33 AM MDT	Severe Thunderstorm Warning	BIS	15 min
Jul 10, 12:01 PM MDT	Severe Thunderstorm Warning	BIS	29 min
Jul 10, 12:20 PM MDT	Severe Thunderstorm Warning	BIS	55 min
Jul 10, 1:08 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 10, 1:23 PM MDT	Areal Flood Advisory	BIS	4 hr
Jul 10, 4:52 PM MDT	Areal Flood Warning	BIS	24 hr
Jul 14, 4:33 PM MDT	Tornado Watch	SPC	7 hr
Jul 14, 8:46 PM MDT	Mesoscale Discussion	SPC	59 min
Jul 14, 10:01 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 15, 3:15 AM MDT	Excessive Heat Watch	BIS	11 hr
Jul 15, 2:01 PM MDT	Excessive Heat Warning	BIS	5 days
Jul 16, 2:53 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 16, 3:57 PM MDT	Tornado Watch	SPC	7 hr
Jul 16, 5:52 PM MDT	Severe Thunderstorm Warning	BIS	53 min
Jul 18, 2:28 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 18, 3:03 PM MDT	Flash Flood Watch	BIS	6 hr
Jul 18, 6:43 PM MDT	Severe Thunderstorm Warning	BIS	62 min
Jul 18, 7:01 PM MDT	Tornado Warning	BIS	29 min
Jul 18, 7:46 PM MDT	Severe Thunderstorm Warning	BIS	45 min
Jul 19, 1:57 PM MDT	Wind Advisory	BIS	28 hr
Jul 22, 2:56 AM MDT	Flash Flood Watch	BIS	23 hr
Jul 22, 10:05 AM MDT	Mesoscale Discussion	SPC	55 min
Jul 22, 4:17 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 22, 4:26 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Jul 22, 4:35 PM MDT	Tornado Watch	SPC	8 hr
Jul 22, 7:56 PM MDT	Mesoscale Discussion	SPC	94 min
Jul 22, 8:15 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 22, 8:56 PM MDT	Tornado Warning	BIS	34 min
Jul 22, 9:16 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Jul 22, 9:25 PM MDT	Tornado Warning	BIS	35 min
Jul 22, 10:11 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Jul 23, 2:04 AM MDT	Wind Advisory	BIS	4 hr
Jul 24, 12:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jul 24, 1:43 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 24, 4:26 PM MDT	Mesoscale Discussion	SPC	94 min
Jul 25, 3:04 AM MDT	Flash Flood Watch	BIS	42 hr
Jul 27, 4:51 AM MDT	Dense Fog Advisory	BIS	4 hr
Jul 29, 8:06 PM MDT	Mesoscale Discussion	SPC	54 min
Jul 29, 8:25 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Jul 31, 2:13 AM MDT	Heat Advisory	BIS	17 hr
Jul 31, 4:44 PM MDT	Tornado Watch	SPC	7 hr
Jul 31, 7:16 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 31, 7:33 PM MDT	Severe Thunderstorm Warning	BIS	57 min
Jul 31, 8:25 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Jul 31, 8:27 PM MDT	Severe Thunderstorm Warning	BIS	63 min
Jul 31, 9:00 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 31, 9:13 PM MDT	Severe Thunderstorm Warning	BIS	47 min
Jul 31, 9:35 PM MDT	Flash Flood Warning	BIS	5 hr
Aug 1, 2:00 AM MDT	Heat Advisory	BIS	16 hr
Aug 1, 12:33 PM MDT	Mesoscale Discussion	SPC	57 min
Aug 1, 1:19 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 1, 4:57 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 1, 5:10 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 4, 2:49 PM MDT	Flash Flood Watch	BIS	45 hr
Aug 5, 12:05 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 5, 12:48 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 5, 4:23 PM MDT	Severe Thunderstorm Warning	BIS	67 min
Aug 5, 4:25 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 5, 4:42 PM MDT	Areal Flood Advisory	BIS	93 min
Aug 5, 5:04 PM MDT	Severe Thunderstorm Warning	BIS	41 min
Aug 5, 5:19 PM MDT	Severe Thunderstorm Warning	BIS	39 min
Aug 5, 5:26 PM MDT	Mesoscale Discussion	SPC	94 min
Aug 11, 12:49 PM MDT	Mesoscale Discussion	SPC	86 min
Aug 14, 7:42 PM MDT	Mesoscale Discussion	SPC	93 min
Aug 15, 2:47 PM MDT	Mesoscale Discussion	SPC	58 min
Aug 15, 4:23 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 15, 6:20 PM MDT	Tornado Warning	BIS	25 min
Aug 15, 7:14 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Aug 15, 7:47 PM MDT	Severe Thunderstorm Warning	BIS	28 min
Aug 15, 8:17 PM MDT	Severe Thunderstorm Warning	BIS	40 min
Aug 15, 8:37 PM MDT	Mesoscale Discussion	SPC	83 min
Aug 15, 10:21 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Aug 15, 11:11 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Aug 16, 8:55 AM MDT	Wind Advisory	BIS	6 hr
Aug 18, 2:43 PM MDT	Mesoscale Discussion	SPC	92 min
Aug 28, 1:09 AM MDT	Mesoscale Discussion	SPC	66 min
Aug 28, 3:06 AM MDT	Severe Thunderstorm Warning	BIS	39 min
Aug 31, 1:47 AM MDT	Dense Fog Advisory	BIS	6 hr
Aug 31, 9:36 PM MDT	Severe Thunderstorm Warning	BIS	54 min
Aug 31, 9:59 PM MDT	Severe Thunderstorm Warning	BIS	39 min
Sep 12, 2:49 PM MDT	Freeze Watch	BIS	23 hr
Sep 13, 1:59 PM MDT	Freeze Warning	BIS	18 hr
Sep 14, 2:58 AM MDT	Freeze Watch	BIS	11 hr
Sep 14, 2:10 PM MDT	Frost Advisory	BIS	18 hr
Sep 19, 2:53 AM MDT	High Wind Watch	BIS	11 hr
Sep 19, 2:18 PM MDT	High Wind Warning	BIS	28 hr
Sep 21, 2:17 PM MDT	Frost Advisory	BIS	18 hr
Sep 28, 2:09 AM MDT	Red Flag Warning	BIS	18 hr
Oct 4, 2:52 AM MDT	Fire Weather Watch	BIS	25 hr
Oct 5, 3:07 AM MDT	Wind Advisory	BIS	16 hr
Oct 5, 3:27 AM MDT	Red Flag Warning	BIS	16 hr
Oct 6, 3:17 AM MDT	Wind Advisory	BIS	15 hr
Oct 6, 3:49 AM MDT	Fire Weather Watch	BIS	24 hr
Oct 6, 3:49 AM MDT	Red Flag Warning	BIS	16 hr
Oct 6, 1:46 PM MDT	High Wind Watch	BIS	13 hr
Oct 7, 3:07 AM MDT	High Wind Warning	BIS	17 hr
Oct 7, 3:37 AM MDT	Red Flag Warning	BIS	16 hr
Nov 2, 3:39 AM MDT	Fire Weather Watch	BIS	24 hr
Nov 3, 3:19 AM MDT	Red Flag Warning	BIS	15 hr
Nov 6, 2:29 AM MST	Wind Advisory	BIS	17 hr
Nov 25, 3:28 AM MST	Wind Advisory	BIS	38 hr
Nov 29, 2:42 PM MST	Winter Weather Advisory	BIS	36 hr
Dec 3, 4:09 AM MST	Winter Weather Advisory	BIS	44 hr
Dec 14, 1:31 AM MST	Freezing Rain Advisory	BIS	9 hr
Dec 25, 2:33 PM MST	Wind Advisory	BIS	26 hr
Dec 30, 3:10 AM MST	High Wind Watch	BIS	12 hr
Dec 30, 2:40 PM MST	High Wind Warning	BIS	45 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	48
Tornado Warning	9
Severe Thunderstorm Watch	10
Tornado Watch	7
Mesoscale Discussion	31
Flooding
Areal Flood Warning	4
Flash Flood Warning	3
Flash Flood Watch	7
Flood Watch	4
Areal Flood Advisory	10
Winter
Blizzard Warning	1
Ice Storm Warning	1
Winter Storm Warning	3
Winter Storm Watch	4
Freezing Rain Advisory	1
Winter Weather Advisory	18
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	2
Cold
Freeze Warning	1
Wind Chill Warning	3
Freeze Watch	2
Frost Advisory	4
Wind Chill Advisory	10
Wind and dust
High Wind Warning	6
High Wind Watch	5
Wind Advisory	18
Fire
Red Flag Warning	5
Fire Weather Watch	3
Fog and smoke
Dense Fog Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.