Alert archive / North Dakota / Logan County

Weather alerts in Logan County, North Dakota, 2015

137 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Logan County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 137
Warnings: 29
Watches: 23
Advisories: 51
Busiest month: May19 alerts
Busiest day: July 28, 20155 alerts

Over time

By month

Warning verification

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

Logan County, 2015

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	7	5	29%
Flash flood warnings	1	0	100%

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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 3, 6:30 AM CST	Wind Chill Advisory	BIS	54 hr
Jan 5, 3:42 PM CST	Wind Chill Advisory	BIS	32 hr
Jan 6, 3:24 AM CST	Wind Chill Warning	BIS	33 hr
Jan 7, 3:55 PM CST	Winter Weather Advisory	BIS	26 hr
Jan 8, 2:41 PM CST	Wind Chill Advisory	BIS	21 hr
Jan 9, 2:56 PM CST	Wind Chill Advisory	BIS	19 hr
Jan 12, 3:24 PM CST	Wind Chill Advisory	BIS	19 hr
Jan 16, 2:33 PM CST	Wind Advisory	BIS	22 hr
Jan 31, 3:13 PM CST	Wind Chill Advisory	BIS	20 hr
Feb 7, 3:12 PM CST	Freezing Rain Advisory	BIS	23 hr
Feb 9, 3:38 AM CST	Freezing Rain Advisory	BIS	29 hr
Feb 10, 2:55 AM CST	Wind Advisory	BIS	21 hr
Feb 11, 2:34 AM CST	Wind Chill Advisory	BIS	33 hr
Feb 13, 3:53 PM CST	Wind Chill Advisory	BIS	24 hr
Feb 17, 3:58 AM CST	Wind Chill Advisory	BIS	32 hr
Feb 18, 3:23 PM CST	Wind Chill Advisory	BIS	19 hr
Feb 20, 5:50 PM CST	Wind Chill Advisory	BIS	60 hr
Feb 25, 3:34 AM CST	Wind Chill Advisory	BIS	32 hr
Feb 26, 2:59 PM CST	Wind Chill Advisory	BIS	19 hr
Mar 2, 2:25 PM CST	Wind Advisory	BIS	28 hr
Mar 3, 2:56 PM CST	Wind Chill Advisory	BIS	21 hr
Mar 4, 2:43 PM CST	Wind Chill Advisory	BIS	18 hr
Mar 14, 3:55 AM CDT	Red Flag Warning	BIS	16 hr
Mar 28, 3:59 AM CDT	Wind Advisory	BIS	33 hr
Mar 28, 8:40 PM CDT	Severe Thunderstorm Warning	BIS	50 min
Mar 28, 9:34 PM CDT	Special Weather Statement	BIS	56 min
Mar 31, 3:56 AM CDT	Fire Weather Watch	BIS	11 hr
Mar 31, 3:25 PM CDT	Red Flag Warning	BIS	30 hr
Apr 2, 3:39 AM CDT	Red Flag Warning	BIS	15 hr
Apr 2, 6:35 AM CDT	Wind Advisory	BIS	12 hr
Apr 11, 4:13 AM CDT	Red Flag Warning	BIS	15 hr
Apr 11, 3:47 PM CDT	Fire Weather Watch	BIS	12 hr
Apr 12, 3:58 AM CDT	Red Flag Warning	BIS	18 hr
Apr 12, 12:59 PM CDT	Fire Weather Watch	BIS	15 hr
Apr 13, 3:59 AM CDT	Fire Weather Watch	BIS	17 hr
Apr 13, 3:59 AM CDT	Red Flag Warning	BIS	16 hr
Apr 13, 8:58 PM CDT	Red Flag Warning	BIS	25 hr
Apr 14, 3:42 AM CDT	Fire Weather Watch	BIS	24 hr
Apr 15, 3:23 AM CDT	Wind Advisory	BIS	16 hr
Apr 15, 3:47 AM CDT	Red Flag Warning	BIS	16 hr
Apr 19, 2:33 PM CDT	Red Flag Warning	BIS	31 hr
Apr 20, 3:32 AM CDT	Wind Advisory	BIS	17 hr
Apr 21, 3:48 AM CDT	Red Flag Warning	BIS	17 hr
Apr 29, 3:38 PM CDT	Red Flag Warning	BIS	27 hr
May 1, 2:51 PM CDT	Fire Weather Watch	BIS	12 hr
May 2, 3:10 AM CDT	Red Flag Warning	BIS	17 hr
May 5, 3:12 AM CDT	Red Flag Warning	BIS	16 hr
May 8, 3:40 PM CDT	Frost Advisory	BIS	17 hr
May 9, 4:25 AM CDT	Winter Storm Watch	BIS	25 hr
May 10, 5:05 AM CDT	Winter Weather Advisory	BIS	34 hr
May 11, 3:37 PM CDT	Frost Advisory	BIS	17 hr
May 13, 8:26 AM CDT	Special Weather Statement	BIS	19 min
May 13, 8:50 AM CDT	Special Weather Statement	BIS	25 min
May 16, 5:05 PM CDT	Special Weather Statement	BIS	25 min
May 17, 4:23 AM CDT	Wind Advisory	BIS	27 hr
May 17, 9:52 AM CDT	Areal Flood Advisory	BIS	24 hr
May 17, 2:54 PM CDT	Freeze Warning	BIS	19 hr
May 18, 4:00 AM CDT	Freeze Warning	BIS	29 hr
May 19, 3:01 PM CDT	Frost Advisory	BIS	18 hr
May 25, 6:52 PM CDT	Special Weather Statement	BIS	23 min
May 25, 7:18 PM CDT	Special Weather Statement	BIS	27 min
May 25, 7:47 PM CDT	Special Weather Statement	BIS	28 min
May 29, 2:56 PM CDT	Frost Advisory	BIS	18 hr
Jun 2, 5:11 AM CDT	Special Weather Statement	BIS	49 min
Jun 2, 2:28 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 2, 2:46 PM CDT	Tornado Watch	SPC	7 hr
Jun 2, 6:22 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 6, 3:05 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 13, 5:11 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 14, 4:26 AM CDT	Severe Thunderstorm Warning	BIS	64 min
Jun 19, 3:01 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 19, 5:48 PM CDT	Mesoscale Discussion	SPC	57 min
Jun 19, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	30 min
Jun 19, 9:29 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 19, 9:45 PM CDT	Severe Thunderstorm Warning	BIS	60 min
Jun 21, 3:23 PM CDT	Tornado Watch	SPC	8 hr
Jun 21, 8:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 21, 10:07 PM CDT	Severe Thunderstorm Warning	BIS	53 min
Jun 21, 10:41 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 21, 11:25 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 27, 4:01 PM CDT	Special Weather Statement	BIS	59 min
Jul 2, 9:10 AM CDT	Areal Flood Advisory	BIS	3 hr
Jul 4, 6:49 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 11, 5:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jul 11, 5:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 11, 9:04 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 15, 1:09 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 16, 12:24 PM CDT	Severe Thunderstorm Warning	BIS	66 min
Jul 16, 2:05 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 17, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 17, 6:02 PM CDT	Mesoscale Discussion	SPC	118 min
Jul 23, 3:58 PM CDT	Severe Thunderstorm Watch	SPC	11 hr
Jul 23, 10:16 PM CDT	Severe Thunderstorm Warning	BIS	59 min
Jul 25, 4:30 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 27, 3:40 AM CDT	High Wind Watch	BIS	23 hr
Jul 27, 10:49 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 27, 11:20 PM CDT	Special Weather Statement	BIS	40 min
Jul 27, 11:50 PM CDT	Special Weather Statement	BIS	40 min
Jul 28, 12:32 AM CDT	Special Weather Statement	BIS	58 min
Jul 28, 2:33 AM CDT	Wind Advisory	BIS	40 hr
Aug 1, 3:13 PM CDT	Mesoscale Discussion	SPC	62 min
Aug 5, 2:52 PM CDT	Flash Flood Watch	BIS	29 hr
Aug 6, 7:56 AM CDT	Flash Flood Warning	BIS	6 hr
Aug 6, 8:24 AM CDT	Special Weather Statement	BIS	36 min
Aug 6, 1:36 PM CDT	Special Weather Statement	BIS	39 min
Aug 7, 10:26 PM CDT	Special Weather Statement	BIS	49 min
Aug 14, 7:56 PM CDT	Heat Advisory	BIS	25 hr
Aug 15, 3:38 PM CDT	Mesoscale Discussion	SPC	67 min
Aug 15, 6:13 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 21, 1:42 PM CDT	Wind Advisory	BIS	53 hr
Sep 4, 10:09 AM CDT	Areal Flood Advisory	BIS	3 hr
Sep 6, 4:25 AM CDT	Dense Fog Advisory	BIS	4 hr
Sep 10, 1:59 PM CDT	Frost Advisory	BIS	19 hr
Sep 17, 12:25 AM CDT	Special Weather Statement	BIS	50 min
Sep 17, 1:04 AM CDT	Special Weather Statement	BIS	41 min
Sep 24, 3:31 AM CDT	Dense Fog Advisory	BIS	8 hr
Sep 25, 2:52 AM CDT	Dense Fog Advisory	BIS	8 hr
Sep 28, 1:25 PM CDT	Frost Advisory	BIS	19 hr
Oct 10, 11:10 AM CDT	High Wind Watch	BIS	17 hr
Oct 11, 3:48 AM CDT	High Wind Warning	BIS	35 hr
Oct 11, 3:49 AM CDT	Red Flag Warning	BIS	17 hr
Oct 15, 3:33 AM CDT	Freeze Warning	BIS	30 hr
Oct 28, 3:44 AM CDT	Wind Advisory	BIS	15 hr
Oct 31, 3:46 AM CDT	Wind Advisory	BIS	15 hr
Nov 10, 2:47 PM CST	High Wind Watch	BIS	24 hr
Nov 11, 2:48 PM CST	Wind Advisory	BIS	27 hr
Nov 16, 2:46 PM CST	Fire Weather Watch	BIS	30 hr
Nov 16, 2:49 PM CST	High Wind Watch	BIS	30 hr
Nov 17, 4:44 AM CST	High Wind Warning	BIS	55 hr
Nov 18, 8:18 AM CST	Freezing Rain Advisory	BIS	3 hr
Nov 19, 3:33 AM CST	Wind Advisory	BIS	14 hr
Nov 29, 3:23 PM CST	Winter Weather Advisory	BIS	48 hr
Dec 12, 3:36 PM CST	Dense Fog Advisory	BIS	23 hr
Dec 13, 3:02 PM CST	Dense Fog Advisory	BIS	20 hr
Dec 14, 4:25 AM CST	Winter Storm Watch	BIS	23 hr
Dec 15, 3:38 AM CST	Winter Storm Warning	BIS	38 hr
Dec 20, 8:05 PM CST	Dense Fog Advisory	BIS	16 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	7
Severe Thunderstorm Watch	7
Tornado Watch	2
Mesoscale Discussion	17
Special Weather Statement	17
Flooding
Flash Flood Warning	1
Flash Flood Watch	1
Areal Flood Advisory	3
Winter
Winter Storm Warning	1
Winter Storm Watch	2
Freezing Rain Advisory	3
Winter Weather Advisory	3
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Wind Chill Warning	1
Frost Advisory	6
Wind Chill Advisory	15
Wind and dust
High Wind Warning	2
High Wind Watch	4
Wind Advisory	14
Fire
Red Flag Warning	14
Fire Weather Watch	7
Fog and smoke
Dense Fog Advisory	6

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.