Alert archive / North Dakota / Foster County

Weather alerts in Foster County, North Dakota, 2020

115 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Foster County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 115
Warnings: 17
Watches: 17
Advisories: 48
Busiest month: July27 alerts
Busiest day: June 8, 20206 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 2 tornado warnings covering Foster County in 2020 had a tornado report inside them.

Foster County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	6	5	17%	6	100%	31 min
Flash flood warnings	0			0

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	18	4	78%	13	31%	6 min
NWS Bismarck, ND: severe thunderstorm warnings	291	171	41%	339	83%	25 min
NWS Bismarck, ND: flash flood warnings	1	0	100%	0

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, 2:50 PM CST	High Wind Watch	BIS	24 hr
Jan 4, 2:45 PM CST	Wind Advisory	BIS	21 hr
Jan 9, 1:29 PM CST	Wind Chill Advisory	BIS	23 hr
Jan 10, 1:43 PM CST	Wind Chill Advisory	BIS	22 hr
Jan 13, 2:51 PM CST	Wind Chill Advisory	BIS	3 days
Jan 15, 2:14 PM CST	Winter Storm Watch	BIS	38 hr
Jan 16, 3:45 PM CST	Wind Chill Advisory	BIS	14 hr
Jan 16, 3:45 PM CST	Winter Weather Advisory	BIS	44 hr
Jan 17, 4:05 AM CST	Blizzard Warning	BIS	38 hr
Jan 17, 4:05 AM CST	Wind Chill Advisory	BIS	56 hr
Jan 19, 2:50 PM CST	Wind Chill Advisory	BIS	19 hr
Jan 23, 6:14 PM CST	Dense Fog Advisory	BIS	21 hr
Jan 25, 10:41 PM CST	Winter Weather Advisory	BIS	7 hr
Jan 26, 6:17 AM CST	Winter Weather Advisory	BIS	15 hr
Jan 27, 9:04 PM CST	Dense Fog Advisory	BIS	8 hr
Jan 28, 9:07 PM CST	Dense Fog Advisory	BIS	15 hr
Jan 30, 9:12 PM CST	Dense Fog Advisory	BIS	6 hr
Feb 1, 1:28 PM CST	Wind Advisory	BIS	21 hr
Feb 11, 3:37 AM CST	Winter Weather Advisory	BIS	31 hr
Feb 12, 3:12 AM CST	Wind Chill Advisory	BIS	33 hr
Feb 12, 2:05 PM CST	Wind Chill Warning	BIS	19 hr
Feb 13, 2:05 PM CST	Wind Chill Advisory	BIS	18 hr
Feb 18, 2:51 PM CST	Wind Chill Advisory	BIS	19 hr
Feb 19, 2:13 PM CST	Wind Chill Advisory	BIS	19 hr
Feb 29, 2:37 PM CST	Wind Advisory	BIS	27 hr
Mar 4, 2:24 PM CST	Wind Advisory	BIS	22 hr
Apr 1, 4:04 AM CDT	Winter Weather Advisory	BIS	54 hr
Apr 1, 10:17 PM CDT	Winter Storm Warning	BIS	36 hr
Apr 6, 11:54 PM CDT	Dense Fog Advisory	BIS	4 hr
Apr 8, 3:00 AM CDT	Wind Advisory	BIS	17 hr
Apr 20, 9:48 AM CDT	Wind Advisory	BIS	9 hr
Apr 26, 4:02 AM CDT	Dense Fog Advisory	BIS	5 hr
Jun 6, 10:05 AM CDT	Wind Advisory	BIS	10 hr
Jun 6, 8:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 6, 9:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 7, 3:06 PM CDT	Tornado Watch	SPC	7 hr
Jun 7, 5:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 7:22 PM CDT	Severe Thunderstorm Warning	BIS	23 min
Jun 7, 7:49 PM CDT	Severe Thunderstorm Warning	BIS	26 min
Jun 7, 8:19 PM CDT	Severe Thunderstorm Warning	BIS	56 min
Jun 7, 8:42 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 7, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 7, 11:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 14, 3:31 AM CDT	Wind Advisory	BIS	17 hr
Jun 16, 2:41 AM CDT	Wind Advisory	BIS	19 hr
Jun 17, 2:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 5:21 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 20, 1:18 PM CDT	Mesoscale Discussion	SPC	117 min
Jun 25, 1:16 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 25, 1:41 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 25, 3:31 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 29, 4:39 AM CDT	Heat Advisory	BIS	15 hr
Jun 30, 4:59 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 30, 6:04 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 30, 7:43 PM CDT	Special Weather Statement	BIS	47 min
Jun 30, 7:47 PM CDT	Tornado Warning	BIS	28 min
Jun 30, 8:36 PM CDT	Special Weather Statement	BIS	24 min
Jun 30, 8:38 PM CDT	Mesoscale Discussion	SPC	67 min
Jun 30, 9:03 PM CDT	Special Weather Statement	BIS	42 min
Jul 2, 10:40 PM CDT	Special Weather Statement	BIS	50 min
Jul 2, 11:33 PM CDT	Special Weather Statement	BIS	42 min
Jul 4, 3:23 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 11:09 PM CDT	Mesoscale Discussion	SPC	66 min
Jul 7, 11:44 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 8, 12:00 AM CDT	Special Weather Statement	BIS	45 min
Jul 8, 12:43 AM CDT	Severe Thunderstorm Warning	BIS	62 min
Jul 8, 12:45 AM CDT	Tornado Warning	BIS	30 min
Jul 8, 1:37 AM CDT	Mesoscale Discussion	SPC	113 min
Jul 17, 12:30 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 17, 5:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 17, 6:04 PM CDT	Severe Thunderstorm Warning	BIS	56 min
Jul 17, 6:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 17, 7:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 18, 1:16 PM CDT	Mesoscale Discussion	SPC	119 min
Jul 24, 4:53 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 24, 5:23 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 24, 7:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 7:32 PM CDT	Special Weather Statement	BIS	28 min
Jul 24, 7:57 PM CDT	Special Weather Statement	BIS	33 min
Jul 24, 8:53 PM CDT	Special Weather Statement	BIS	52 min
Jul 25, 5:13 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 6, 5:13 AM CDT	Dense Fog Advisory	BIS	5 hr
Aug 7, 6:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 9, 11:48 AM CDT	Mesoscale Discussion	SPC	57 min
Aug 14, 4:24 AM CDT	Dense Fog Advisory	BIS	4 hr
Aug 23, 12:54 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 23, 8:58 PM CDT	Areal Flood Advisory	BIS	6 hr
Sep 1, 5:16 AM CDT	Wind Advisory	BIS	15 hr
Sep 1, 2:44 PM CDT	Wind Advisory	BIS	33 hr
Sep 2, 7:07 PM CDT	High Wind Warning	BIS	5 hr
Sep 2, 7:13 PM CDT	Severe Thunderstorm Warning	BIS	62 min
Sep 2, 7:19 PM CDT	Mesoscale Discussion	SPC	86 min
Sep 6, 3:00 AM CDT	Freeze Watch	BIS	24 hr
Sep 6, 3:00 AM CDT	Wind Advisory	BIS	17 hr
Sep 7, 2:51 AM CDT	Freeze Watch	BIS	36 hr
Sep 7, 2:51 AM CDT	Freeze Warning	BIS	30 hr
Sep 8, 2:32 PM CDT	Freeze Warning	BIS	18 hr
Sep 24, 5:15 AM CDT	Dense Fog Advisory	BIS	5 hr
Sep 29, 2:20 PM CDT	Wind Advisory	BIS	30 hr
Oct 5, 2:35 PM CDT	Fire Weather Watch	BIS	13 hr
Oct 6, 3:21 AM CDT	Wind Advisory	BIS	12 hr
Oct 6, 3:51 AM CDT	Red Flag Warning	BIS	12 hr
Oct 13, 2:23 PM CDT	Wind Advisory	BIS	29 hr
Oct 16, 2:58 AM CDT	Winter Weather Advisory	BIS	31 hr
Oct 20, 2:53 PM CDT	Winter Storm Watch	BIS	24 hr
Oct 30, 2:13 PM CDT	Wind Advisory	BIS	31 hr
Oct 31, 10:25 AM CDT	High Wind Warning	BIS	11 hr
Nov 7, 2:34 PM CST	Wind Advisory	BIS	33 hr
Nov 7, 9:07 PM CST	Dense Fog Advisory	BIS	17 hr
Nov 17, 2:38 AM CST	Special Weather Statement	BIS	52 min
Nov 18, 2:47 PM CST	Winter Weather Advisory	BIS	27 hr
Dec 11, 2:02 AM CST	Dense Fog Advisory	BIS	12 hr
Dec 21, 3:43 PM CST	Winter Storm Watch	BIS	24 hr
Dec 22, 4:09 PM CST	Blizzard Warning	BIS	23 hr
Dec 23, 2:56 PM CST	Wind Chill Advisory	BIS	21 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	6
Tornado Warning	2
Severe Thunderstorm Watch	9
Tornado Watch	1
Mesoscale Discussion	23
Special Weather Statement	10
Flooding
Areal Flood Advisory	1
Winter
Blizzard Warning	2
Winter Storm Warning	1
Winter Storm Watch	3
Winter Weather Advisory	7
Heat
Heat Advisory	1
Cold
Freeze Warning	2
Wind Chill Warning	1
Freeze Watch	2
Wind Chill Advisory	11
Wind and dust
High Wind Warning	2
High Wind Watch	1
Wind Advisory	17
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	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 2019 2021

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.