Alert archive / North Dakota / Oliver County

Weather alerts in Oliver County, North Dakota, 2012

152 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Oliver County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts: 152
Warnings: 43
Watches: 33
Advisories: 57
Busiest month: March24 alerts
Busiest day: August 24, 20125 alerts

Over time

By month

Warning verification

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

Oliver County, 2012

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	10	7	30%
Flash flood warnings	0

Each office's whole area, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	6	0	100%	1	0%
NWS Bismarck, ND: severe thunderstorm warnings	186	92	51%	202	84%	25 min
NWS Bismarck, ND: flash flood warnings	5	1	80%	2	50%	70 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
Dec 31, 7:13 PM CST	Wind Advisory	BIS	263 days
Jan 2, 6:24 PM CST	Wind Advisory	BIS	24 hr
Jan 3, 1:33 PM CST	Red Flag Warning	BIS	4 hr
Jan 4, 2:57 PM CST	Fire Weather Watch	BIS	14 hr
Jan 5, 4:52 AM CST	Red Flag Warning	BIS	14 hr
Jan 5, 5:03 AM CST	Wind Advisory	BIS	14 hr
Jan 10, 3:38 PM CST	Winter Weather Advisory	BIS	28 hr
Jan 17, 3:29 AM CST	Extreme Cold Watch	BIS	12 hr
Jan 17, 3:04 PM CST	Extreme Cold Warning	BIS	61 hr
Jan 21, 4:13 AM CST	Winter Weather Advisory	BIS	44 hr
Jan 25, 3:49 AM CST	Wind Advisory	BIS	16 hr
Feb 2, 3:31 PM CST	Dense Fog Advisory	BIS	44 hr
Feb 22, 4:00 PM CST	Winter Weather Advisory	BIS	22 hr
Feb 23, 2:46 PM CST	Winter Storm Watch	BIS	24 hr
Feb 24, 2:50 PM CST	Winter Weather Advisory	BIS	60 hr
Feb 26, 5:01 AM CST	Winter Storm Watch	BIS	35 hr
Feb 26, 3:10 PM CST	Blizzard Watch	BIS	25 hr
Feb 27, 4:27 PM CST	Winter Storm Warning	BIS	46 hr
Mar 12, 2:49 AM CDT	Wind Advisory	BIS	16 hr
Mar 12, 3:05 PM CDT	Red Flag Warning	BIS	4 hr
Mar 12, 3:39 PM CDT	Red Flag Warning	BIS	27 hr
Mar 14, 12:17 AM CDT	Wind Advisory	BIS	7 hr
Mar 14, 3:54 PM CDT	Fire Weather Watch	BIS	24 hr
Mar 15, 3:46 PM CDT	Red Flag Warning	BIS	29 hr
Mar 17, 4:26 PM CDT	Fire Weather Watch	BIS	12 hr
Mar 17, 4:26 PM CDT	Red Flag Warning	BIS	30 hr
Mar 18, 4:45 AM CDT	Red Flag Warning	BIS	40 hr
Mar 18, 3:42 PM CDT	High Wind Watch	BIS	13 hr
Mar 18, 3:48 PM CDT	Fire Weather Watch	BIS	21 hr
Mar 19, 4:23 AM CDT	Wind Advisory	BIS	17 hr
Mar 19, 12:46 PM CDT	Red Flag Warning	BIS	32 hr
Mar 20, 3:20 PM CDT	Fire Weather Watch	BIS	24 hr
Mar 21, 3:27 PM CDT	Red Flag Warning	BIS	30 hr
Mar 23, 1:34 AM CDT	Dense Fog Advisory	BIS	10 hr
Mar 25, 4:02 PM CDT	High Wind Watch	BIS	23 hr
Mar 26, 3:07 PM CDT	High Wind Warning	BIS	25 hr
Mar 26, 6:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 26, 9:17 PM CDT	Mesoscale Discussion	SPC	118 min
Mar 26, 11:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 27, 4:28 AM CDT	Wind Advisory	BIS	12 hr
Mar 30, 3:27 PM CDT	Fire Weather Watch	BIS	25 hr
Mar 31, 3:58 PM CDT	Red Flag Warning	BIS	30 hr
Apr 2, 3:01 AM CDT	Wind Advisory	BIS	16 hr
Apr 6, 12:11 AM CDT	Wind Advisory	BIS	19 hr
Apr 6, 11:38 PM CDT	Wind Advisory	BIS	21 hr
Apr 8, 2:33 AM CDT	Red Flag Warning	BIS	17 hr
Apr 8, 2:39 AM CDT	Wind Advisory	BIS	17 hr
Apr 10, 3:00 AM CDT	Fire Weather Watch	BIS	12 hr
Apr 10, 3:13 PM CDT	Red Flag Warning	BIS	29 hr
Apr 12, 2:51 AM CDT	Wind Advisory	BIS	17 hr
Apr 21, 4:21 AM CDT	Wind Advisory	BIS	15 hr
Apr 24, 5:44 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 26, 3:27 PM CDT	Wind Advisory	BIS	30 hr
Apr 29, 3:19 AM CDT	Frost Advisory	BIS	31 hr
May 5, 12:22 AM CDT	Dense Fog Advisory	BIS	11 hr
May 5, 3:23 PM CDT	Wind Advisory	BIS	35 hr
May 7, 2:37 AM CDT	Wind Advisory	BIS	16 hr
May 10, 2:35 AM CDT	Wind Advisory	BIS	14 hr
May 10, 4:48 PM CDT	Mesoscale Discussion	SPC	87 min
May 10, 5:34 PM CDT	Wind Advisory	BIS	7 hr
May 11, 2:55 PM CDT	Frost Advisory	BIS	17 hr
May 21, 7:33 PM CDT	Severe Thunderstorm Warning	BIS	42 min
May 22, 3:44 PM CDT	Mesoscale Discussion	SPC	91 min
May 22, 4:03 PM CDT	Tornado Watch	SPC	7 hr
May 29, 4:16 AM CDT	Frost Advisory	BIS	29 hr
May 30, 1:24 PM CDT	Frost Advisory	BIS	20 hr
Jun 1, 3:04 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 6, 3:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 6, 5:04 PM CDT	Severe Thunderstorm Warning	BIS	56 min
Jun 7, 1:36 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 10, 4:09 AM CDT	Wind Advisory	BIS	38 hr
Jun 13, 2:28 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 13, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 13, 7:14 PM CDT	Severe Thunderstorm Warning	BIS	61 min
Jun 13, 8:36 PM CDT	Severe Thunderstorm Warning	BIS	54 min
Jun 13, 8:39 PM CDT	Areal Flood Advisory	BIS	6 hr
Jun 20, 1:36 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 24, 9:16 AM CDT	Mesoscale Discussion	SPC	89 min
Jun 24, 9:31 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 24, 12:24 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 25, 3:07 PM CDT	Heat Advisory	BIS	29 hr
Jun 26, 3:06 PM CDT	Mesoscale Discussion	SPC	54 min
Jul 3, 6:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 6:52 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 3, 10:34 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 11, 9:47 PM CDT	Severe Thunderstorm Warning	BIS	58 min
Jul 18, 2:37 PM CDT	Heat Advisory	BIS	31 hr
Jul 21, 9:27 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 24, 8:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 2, 4:50 PM CDT	Severe Thunderstorm Warning	BIS	55 min
Aug 2, 5:42 PM CDT	Severe Thunderstorm Warning	BIS	42 min
Aug 23, 3:20 AM CDT	Fire Weather Watch	BIS	45 hr
Aug 24, 3:58 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 24, 4:33 PM CDT	Severe Thunderstorm Warning	BIS	42 min
Aug 24, 5:15 PM CDT	Severe Thunderstorm Warning	BIS	60 min
Aug 24, 5:17 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 24, 5:50 PM CDT	Severe Thunderstorm Warning	BIS	55 min
Aug 25, 12:02 AM CDT	Red Flag Warning	BIS	21 hr
Aug 27, 3:22 PM CDT	Fire Weather Watch	BIS	24 hr
Aug 28, 3:15 PM CDT	Red Flag Warning	BIS	36 hr
Aug 29, 2:53 PM CDT	Mesoscale Discussion	SPC	97 min
Aug 29, 3:01 PM CDT	Fire Weather Watch	BIS	37 hr
Aug 31, 3:53 AM CDT	Fire Weather Watch	BIS	11 hr
Aug 31, 3:53 AM CDT	Red Flag Warning	BIS	17 hr
Aug 31, 3:12 PM CDT	Red Flag Warning	BIS	31 hr
Aug 31, 9:37 PM CDT	Fire Weather Watch	BIS	17 hr
Sep 7, 2:48 PM CDT	Fire Weather Watch	BIS	3 days
Sep 8, 4:17 AM CDT	Frost Advisory	BIS	29 hr
Sep 9, 3:01 PM CDT	Red Flag Warning	BIS	31 hr
Sep 10, 3:01 PM CDT	Fire Weather Watch	BIS	24 hr
Sep 10, 3:01 PM CDT	Red Flag Warning	BIS	31 hr
Sep 11, 3:59 AM CDT	Frost Advisory	BIS	29 hr
Sep 11, 2:43 PM CDT	Red Flag Warning	BIS	30 hr
Sep 12, 3:11 PM CDT	Frost Advisory	BIS	18 hr
Sep 13, 3:36 AM CDT	Red Flag Warning	BIS	17 hr
Sep 13, 3:07 PM CDT	Frost Advisory	BIS	18 hr
Sep 18, 3:26 AM CDT	Fire Weather Watch	BIS	25 hr
Sep 19, 4:02 AM CDT	Red Flag Warning	BIS	16 hr
Sep 21, 3:33 AM CDT	Freeze Warning	BIS	31 hr
Sep 21, 3:46 AM CDT	Red Flag Warning	BIS	16 hr
Sep 22, 3:13 AM CDT	Freeze Warning	BIS	30 hr
Sep 29, 3:44 AM CDT	Red Flag Warning	BIS	15 hr
Oct 1, 4:03 AM CDT	Fire Weather Watch	BIS	24 hr
Oct 1, 3:47 PM CDT	Red Flag Warning	BIS	27 hr
Oct 3, 4:16 AM CDT	Winter Weather Advisory	BIS	25 hr
Oct 11, 1:49 PM CDT	Fire Weather Watch	BIS	14 hr
Oct 12, 11:42 AM CDT	Wind Advisory	BIS	7 hr
Oct 15, 4:26 AM CDT	High Wind Watch	BIS	33 hr
Oct 15, 11:28 AM CDT	Fire Weather Watch	BIS	26 hr
Oct 16, 1:20 PM CDT	High Wind Warning	BIS	56 hr
Oct 16, 1:36 PM CDT	Red Flag Warning	BIS	53 hr
Oct 18, 6:53 PM CDT	Wind Advisory	BIS	3 hr
Nov 1, 4:07 AM CDT	Winter Weather Advisory	BIS	56 hr
Nov 3, 3:48 PM CDT	Freezing Rain Advisory	BIS	22 hr
Nov 5, 3:47 PM CST	Wind Advisory	BIS	6 hr
Nov 7, 4:17 AM CST	Winter Storm Watch	BIS	34 hr
Nov 7, 4:17 AM CST	Winter Weather Advisory	BIS	4 days
Nov 8, 3:21 AM CST	Winter Storm Warning	BIS	72 hr
Nov 9, 4:42 AM CST	Freezing Rain Advisory	BIS	13 hr
Nov 9, 6:17 PM CST	Mesoscale Discussion	SPC	4 hr
Nov 11, 4:52 PM CST	Winter Weather Advisory	BIS	4 hr
Nov 13, 11:25 PM CST	Dense Fog Advisory	BIS	12 hr
Nov 17, 9:30 PM CST	Dense Fog Advisory	BIS	16 hr
Nov 21, 3:27 AM CST	Wind Advisory	BIS	42 hr
Nov 28, 4:54 AM CST	Dense Fog Advisory	BIS	4 hr
Dec 1, 9:40 PM CST	Dense Fog Advisory	BIS	12 hr
Dec 7, 3:59 PM CST	Winter Weather Advisory	BIS	38 hr
Dec 8, 3:27 AM CST	Blizzard Warning	BIS	30 hr
Dec 14, 8:06 PM CST	Dense Fog Advisory	BIS	9 hr
Dec 17, 4:41 PM CST	Dense Fog Advisory	BIS	10 hr
Dec 22, 3:34 PM CST	Winter Weather Advisory	BIS	36 hr
Dec 23, 3:34 PM CST	Wind Chill Advisory	BIS	44 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	10
Severe Thunderstorm Watch	6
Tornado Watch	1
Mesoscale Discussion	19
Flooding
Areal Flood Advisory	1
Winter
Blizzard Warning	1
Winter Storm Warning	2
Blizzard Watch	1
Winter Storm Watch	3
Freezing Rain Advisory	2
Winter Weather Advisory	10
Heat
Heat Advisory	2
Cold
Extreme Cold Warning	1
Freeze Warning	2
Extreme Cold Watch	1
Frost Advisory	8
Wind Chill Advisory	1
Wind and dust
High Wind Warning	2
High Wind Watch	3
Wind Advisory	24
Fire
Red Flag Warning	25
Fire Weather Watch	18
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 2011 2013

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.