Alert archive / North Dakota / Grant County

Weather alerts in Grant County, North Dakota, 2008

195 weather alerts in 2008, 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 2008. Tap one for its archive.

Alerts: 195
Warnings: 75
Watches: 40
Advisories: 52
Busiest month: July39 alerts
Busiest day: July 10, 200812 alerts

Over time

By month

Warning verification

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

1 of 4 tornado warnings covering Grant County in 2008 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 11 minutes after it went out.

Grant County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	1	75%	1	100%	11 min
Severe thunderstorm warnings	35	11	69%	3	67%	35 min
Flash flood warnings	0			0

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	60	15	75%	24	79%	14 min
NWS Bismarck, ND: severe thunderstorm warnings	432	134	69%	216	90%	27 min
NWS Bismarck, ND: flash flood warnings	10	3	70%	4	75%	10 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 14, 1:32 PM MST	High Wind Watch	BIS	17 hr
Jan 15, 3:54 AM MST	Wind Advisory	BIS	23 hr
Jan 15, 10:05 PM MST	Snow and Blowing Snow Advisory	BIS	5 hr
Jan 16, 4:06 AM MST	Winter Storm Watch	BIS	23 hr
Jan 17, 3:29 AM MST	Winter Weather Advisory	BIS	23 hr
Jan 18, 2:29 AM MST	Wind Chill Advisory	BIS	30 hr
Jan 22, 2:42 PM MST	Winter Weather Advisory	BIS	12 hr
Jan 27, 2:02 PM MST	Winter Weather Advisory	BIS	36 hr
Jan 28, 2:39 PM MST	Wind Chill Warning	BIS	44 hr
Feb 3, 3:05 PM MST	Snow Advisory	BIS	26 hr
Feb 7, 3:31 AM MST	Blizzard Watch	BIS	35 hr
Feb 8, 2:55 PM MST	Winter Weather Advisory	BIS	20 hr
Feb 9, 10:25 AM MST	Wind Chill Advisory	BIS	22 hr
Feb 10, 4:10 AM MST	Snow Advisory	BIS	11 hr
Feb 10, 2:51 PM MST	Winter Weather Advisory	BIS	20 hr
Feb 12, 3:00 AM MST	Winter Storm Watch	BIS	15 hr
Feb 12, 6:09 PM MST	Snow Advisory	BIS	26 hr
Feb 13, 8:23 PM MST	Wind Chill Advisory	BIS	15 hr
Feb 17, 2:33 AM MST	Wind Advisory	BIS	17 hr
Mar 2, 3:18 AM MST	Wind Advisory	BIS	17 hr
Mar 10, 2:28 PM MDT	Red Flag Warning	BIS	4 hr
Mar 12, 2:48 AM MDT	Wind Advisory	BIS	15 hr
Mar 19, 1:58 PM MDT	Snow Advisory	BIS	9 hr
Mar 24, 3:14 AM MDT	High Wind Warning	BIS	18 hr
Mar 24, 4:03 AM MDT	Red Flag Warning	BIS	17 hr
Mar 25, 1:50 PM MDT	Winter Storm Watch	BIS	46 hr
Mar 29, 4:02 AM MDT	Wind Advisory	BIS	17 hr
Mar 29, 4:22 AM MDT	Red Flag Warning	BIS	13 hr
Apr 4, 3:55 AM MDT	Red Flag Warning	BIS	16 hr
Apr 4, 2:19 PM MDT	Winter Storm Watch	BIS	14 hr
Apr 5, 4:32 AM MDT	Winter Storm Warning	BIS	24 hr
Apr 13, 3:05 AM MDT	Fire Weather Watch	BIS	25 hr
Apr 14, 3:58 AM MDT	Red Flag Warning	BIS	17 hr
Apr 14, 3:08 PM MDT	Fire Weather Watch	BIS	12 hr
Apr 15, 3:24 AM MDT	Red Flag Warning	BIS	18 hr
Apr 16, 1:21 PM MDT	Red Flag Warning	BIS	7 hr
Apr 17, 3:03 PM MDT	Fire Weather Watch	BIS	13 hr
Apr 18, 3:38 AM MDT	Red Flag Warning	BIS	16 hr
Apr 18, 2:43 PM MDT	Fire Weather Watch	BIS	13 hr
Apr 19, 3:37 AM MDT	Red Flag Warning	BIS	20 hr
Apr 20, 3:37 AM MDT	Wind Advisory	BIS	17 hr
Apr 20, 4:25 AM MDT	Red Flag Warning	BIS	17 hr
Apr 20, 6:05 PM MDT	Mesoscale Discussion	SPC	55 min
Apr 21, 3:19 PM MDT	Fire Weather Watch	BIS	12 hr
Apr 22, 3:45 AM MDT	Red Flag Warning	BIS	17 hr
Apr 27, 3:57 AM MDT	Red Flag Warning	BIS	16 hr
Apr 28, 3:07 AM MDT	Red Flag Warning	BIS	17 hr
May 1, 3:28 AM MDT	Wind Advisory	BIS	41 hr
May 1, 3:10 PM MDT	Snow and Blowing Snow Advisory	BIS	19 hr
May 1, 5:57 PM MDT	High Wind Warning	BIS	5 hr
May 4, 3:25 AM MDT	Red Flag Warning	BIS	17 hr
May 9, 2:50 PM MDT	Winter Weather Advisory	BIS	19 hr
May 15, 12:00 PM MDT	Fire Weather Watch	BIS	16 hr
May 16, 3:24 AM MDT	Wind Advisory	BIS	17 hr
May 16, 3:37 AM MDT	Red Flag Warning	BIS	16 hr
May 16, 12:45 PM MDT	Fire Weather Watch	BIS	15 hr
May 17, 3:12 AM MDT	Wind Advisory	BIS	17 hr
May 17, 3:21 AM MDT	Red Flag Warning	BIS	17 hr
May 18, 2:45 PM MDT	Fire Weather Watch	BIS	13 hr
May 19, 3:13 AM MDT	Wind Advisory	BIS	17 hr
May 19, 3:29 AM MDT	Red Flag Warning	BIS	17 hr
May 21, 11:56 AM MDT	Red Flag Warning	BIS	8 hr
May 22, 3:23 AM MDT	Wind Advisory	BIS	21 hr
May 23, 2:59 AM MDT	Wind Advisory	BIS	17 hr
May 24, 2:48 AM MDT	Wind Advisory	BIS	15 hr
May 24, 4:55 PM MDT	Severe Thunderstorm Warning	BIS	50 min
May 24, 5:07 PM MDT	Mesoscale Discussion	SPC	113 min
May 24, 5:24 PM MDT	Tornado Watch	SPC	5 hr
May 24, 5:43 PM MDT	Severe Thunderstorm Warning	BIS	62 min
May 24, 6:46 PM MDT	Severe Thunderstorm Warning	BIS	44 min
May 26, 2:04 PM MDT	Frost Advisory	BIS	18 hr
May 29, 8:19 PM MDT	Severe Thunderstorm Warning	BIS	56 min
May 30, 6:39 PM MDT	Severe Thunderstorm Warning	BIS	66 min
Jun 8, 1:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 11:02 AM MDT	Severe Thunderstorm Warning	BIS	43 min
Jun 11, 12:42 PM MDT	Severe Thunderstorm Warning	BIS	35 min
Jun 12, 2:47 AM MDT	Wind Advisory	BIS	16 hr
Jun 13, 3:29 AM MDT	Wind Advisory	BIS	15 hr
Jun 13, 4:33 PM MDT	Mesoscale Discussion	SPC	87 min
Jun 14, 12:43 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 18, 1:27 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 18, 3:59 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 18, 4:33 PM MDT	Severe Thunderstorm Warning	BIS	57 min
Jun 18, 5:29 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jun 18, 6:21 PM MDT	Tornado Warning	BIS	24 min
Jun 18, 6:40 PM MDT	Severe Thunderstorm Warning	BIS	35 min
Jun 18, 6:47 PM MDT	Tornado Warning	BIS	43 min
Jun 18, 6:58 PM MDT	Severe Thunderstorm Warning	BIS	62 min
Jun 18, 7:32 PM MDT	Severe Thunderstorm Warning	BIS	58 min
Jun 18, 7:46 PM MDT	Mesoscale Discussion	SPC	89 min
Jun 18, 8:27 PM MDT	Severe Thunderstorm Warning	BIS	63 min
Jun 24, 1:19 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 24, 1:51 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 24, 3:58 PM MDT	Severe Thunderstorm Warning	BIS	62 min
Jun 24, 4:48 PM MDT	Severe Thunderstorm Warning	BIS	57 min
Jun 24, 4:59 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jun 24, 5:39 PM MDT	Severe Thunderstorm Warning	BIS	66 min
Jun 24, 6:00 PM MDT	Mesoscale Discussion	SPC	60 min
Jun 24, 6:46 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Jun 26, 12:41 PM MDT	Mesoscale Discussion	SPC	94 min
Jun 26, 12:59 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 26, 4:09 PM MDT	Severe Thunderstorm Warning	BIS	66 min
Jun 26, 4:59 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jun 26, 5:28 PM MDT	Mesoscale Discussion	SPC	62 min
Jun 26, 5:46 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 28, 3:19 AM MDT	Wind Advisory	BIS	16 hr
Jul 6, 7:51 PM MDT	Mesoscale Discussion	SPC	54 min
Jul 9, 6:34 PM MDT	Severe Thunderstorm Warning	BIS	56 min
Jul 10, 2:46 PM MDT	Mesoscale Discussion	SPC	59 min
Jul 10, 3:06 PM MDT	High Wind Watch	BIS	13 hr
Jul 10, 3:11 PM MDT	Tornado Watch	SPC	7 hr
Jul 10, 3:29 PM MDT	Fire Weather Watch	BIS	13 hr
Jul 10, 3:41 PM MDT	Severe Thunderstorm Warning	BIS	64 min
Jul 10, 3:55 PM MDT	Severe Thunderstorm Warning	BIS	65 min
Jul 10, 4:03 PM MDT	Tornado Warning	BIS	27 min
Jul 10, 4:44 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jul 10, 4:50 PM MDT	Tornado Warning	BIS	40 min
Jul 10, 4:59 PM MDT	Severe Thunderstorm Warning	BIS	61 min
Jul 10, 5:45 PM MDT	Severe Thunderstorm Warning	BIS	60 min
Jul 11, 3:52 AM MDT	High Wind Warning	BIS	16 hr
Jul 11, 4:18 AM MDT	Red Flag Warning	BIS	16 hr
Jul 11, 2:58 PM MDT	Wind Advisory	BIS	20 hr
Jul 12, 10:33 AM MDT	High Wind Warning	BIS	7 hr
Jul 15, 7:07 PM MDT	Severe Thunderstorm Warning	BIS	53 min
Jul 19, 1:53 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 23, 1:22 PM MDT	Mesoscale Discussion	SPC	113 min
Jul 23, 4:23 PM MDT	Severe Thunderstorm Warning	BIS	67 min
Jul 26, 8:57 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 27, 1:25 AM MDT	Mesoscale Discussion	SPC	95 min
Jul 27, 1:40 AM MDT	Severe Thunderstorm Warning	BIS	65 min
Jul 27, 2:14 AM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 27, 2:39 AM MDT	Severe Thunderstorm Warning	BIS	66 min
Jul 27, 2:44 AM MDT	Severe Thunderstorm Warning	BIS	61 min
Jul 28, 11:17 AM MDT	Mesoscale Discussion	SPC	58 min
Jul 28, 2:38 PM MDT	Mesoscale Discussion	SPC	67 min
Jul 28, 6:34 PM MDT	Tornado Watch	SPC	4 hr
Jul 30, 2:39 PM MDT	Mesoscale Discussion	SPC	66 min
Jul 30, 3:07 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 30, 6:04 PM MDT	Mesoscale Discussion	SPC	56 min
Jul 30, 6:19 PM MDT	Severe Thunderstorm Warning	BIS	33 min
Jul 30, 9:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 30, 11:18 PM MDT	Severe Thunderstorm Warning	BIS	57 min
Jul 30, 11:46 PM MDT	Severe Thunderstorm Warning	BIS	59 min
Jul 30, 11:50 PM MDT	Mesoscale Discussion	SPC	85 min
Jul 31, 12:48 AM MDT	Severe Thunderstorm Warning	BIS	57 min
Aug 1, 9:54 PM MDT	Mesoscale Discussion	SPC	96 min
Aug 2, 11:05 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 21, 2:33 PM MDT	Mesoscale Discussion	SPC	117 min
Aug 22, 2:45 AM MDT	Wind Advisory	BIS	17 hr
Aug 26, 1:33 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 29, 2:54 AM MDT	Fire Weather Watch	BIS	24 hr
Aug 30, 3:11 AM MDT	Red Flag Warning	BIS	18 hr
Aug 30, 3:11 PM MDT	Fire Weather Watch	BIS	11 hr
Aug 31, 12:54 AM MDT	Wind Advisory	BIS	19 hr
Aug 31, 2:37 AM MDT	Red Flag Warning	BIS	18 hr
Sep 7, 3:20 AM MDT	Frost Advisory	BIS	27 hr
Sep 22, 2:38 PM MDT	Flash Flood Watch	BIS	12 hr
Sep 22, 6:35 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 22, 9:21 PM MDT	Mesoscale Discussion	SPC	54 min
Oct 4, 3:21 AM MDT	Wind Advisory	BIS	17 hr
Oct 7, 2:53 PM MDT	Freeze Watch	BIS	13 hr
Oct 7, 2:56 PM MDT	Red Flag Warning	BIS	29 hr
Oct 8, 3:42 AM MDT	Freeze Warning	BIS	28 hr
Oct 8, 3:42 AM MDT	Wind Advisory	BIS	14 hr
Oct 13, 1:50 PM MDT	Freeze Warning	BIS	18 hr
Oct 24, 3:04 PM MDT	Wind Advisory	BIS	32 hr
Oct 25, 2:44 AM MDT	High Wind Watch	BIS	24 hr
Oct 26, 2:14 AM MDT	High Wind Warning	BIS	16 hr
Nov 4, 2:07 AM MST	Winter Storm Watch	BIS	51 hr
Nov 5, 2:24 AM MST	Blizzard Warning	BIS	55 hr
Nov 6, 2:33 AM MST	Mesoscale Discussion	SPC	4 hr
Nov 7, 3:30 AM MST	Winter Weather Advisory	BIS	11 hr
Nov 13, 2:01 PM MST	Wind Advisory	BIS	27 hr
Nov 14, 1:17 PM MST	Mesoscale Discussion	SPC	58 min
Nov 21, 2:50 AM MST	Winter Weather Advisory	BIS	18 hr
Dec 2, 11:29 AM MST	Mesoscale Discussion	SPC	4 hr
Dec 8, 12:09 AM MST	Winter Weather Advisory	BIS	17 hr
Dec 11, 2:07 PM MST	Winter Storm Watch	BIS	14 hr
Dec 12, 3:57 AM MST	Blizzard Watch	BIS	10 hr
Dec 12, 1:45 PM MST	Blizzard Warning	BIS	57 hr
Dec 13, 5:29 PM MST	Mesoscale Discussion	SPC	4 hr
Dec 14, 3:36 AM MST	Wind Chill Warning	BIS	31 hr
Dec 15, 11:10 AM MST	Wind Chill Advisory	BIS	4 hr
Dec 18, 2:44 PM MST	Winter Storm Watch	BIS	12 hr
Dec 19, 2:46 AM MST	Winter Weather Advisory	BIS	24 hr
Dec 20, 2:22 AM MST	Wind Chill Advisory	BIS	3 hr
Dec 20, 5:45 AM MST	Wind Chill Warning	BIS	30 hr
Dec 20, 10:43 AM MST	Winter Weather Advisory	BIS	13 hr
Dec 21, 11:11 AM MST	Wind Chill Advisory	BIS	9 hr
Dec 22, 2:57 AM MST	Wind Chill Advisory	BIS	8 hr
Dec 22, 2:57 AM MST	Winter Weather Advisory	BIS	35 hr
Dec 25, 1:50 PM MST	Winter Weather Advisory	BIS	42 hr
Dec 26, 10:56 AM MST	Mesoscale Discussion	SPC	4 hr
Dec 29, 3:56 AM MST	Winter Storm Warning	BIS	34 hr
Dec 29, 3:56 AM MST	Winter Weather Advisory	BIS	31 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	35
Tornado Warning	4
Severe Thunderstorm Watch	12
Tornado Watch	3
Mesoscale Discussion	28
Flooding
Flash Flood Watch	1
Winter
Blizzard Warning	2
Winter Storm Warning	2
Blizzard Watch	2
Winter Storm Watch	7
Snow Advisory	4
Snow and Blowing Snow Advisory	2
Winter Weather Advisory	14
Cold
Freeze Warning	2
Wind Chill Warning	3
Freeze Watch	1
Frost Advisory	2
Wind Chill Advisory	7
Wind and dust
High Wind Warning	5
High Wind Watch	3
Wind Advisory	23
Fire
Red Flag Warning	22
Fire Weather Watch	11

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2007 2009

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.