Alert archive / North Dakota / Oliver County

Weather alerts in Oliver County, North Dakota, 2016

138 weather alerts in 2016, 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 2016. Tap one for its archive.

Alerts: 138
Warnings: 35
Watches: 18
Advisories: 38
Busiest month: July36 alerts
Busiest day: July 21, 20167 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, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	23	22	4%	7	100%	24 min
Flash flood warnings	0			0

Each office's whole area, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	26	6	77%	18	61%	11 min
NWS Bismarck, ND: severe thunderstorm warnings	259	195	25%	463	91%	26 min
NWS Bismarck, ND: flash flood warnings	4	1	75%	5	40%	112 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 9, 2:39 PM CST	Wind Chill Advisory	BIS	21 hr
Jan 14, 5:32 AM CST	Freezing Rain Advisory	BIS	6 hr
Jan 16, 10:13 AM CST	Wind Chill Advisory	BIS	28 hr
Jan 17, 2:09 PM CST	Wind Chill Advisory	BIS	20 hr
Jan 19, 7:16 PM CST	Dense Fog Advisory	BIS	15 hr
Feb 5, 3:55 AM CST	High Wind Watch	BIS	23 hr
Feb 5, 2:44 PM CST	High Wind Warning	BIS	54 hr
Feb 7, 8:51 PM CST	Wind Advisory	BIS	8 hr
Feb 13, 3:35 AM CST	Winter Weather Advisory	BIS	30 hr
Feb 18, 4:18 AM CST	Wind Advisory	BIS	40 hr
Feb 18, 3:40 PM CST	Dense Fog Advisory	BIS	13 hr
Mar 23, 3:43 AM CDT	Freezing Rain Advisory	BIS	6 hr
Apr 5, 3:32 AM CDT	Wind Advisory	BIS	24 hr
Apr 6, 5:28 PM CDT	Severe Thunderstorm Warning	BIS	47 min
Apr 6, 6:11 PM CDT	Severe Thunderstorm Warning	BIS	49 min
Apr 6, 8:29 PM CDT	Special Weather Statement	BIS	46 min
Apr 7, 12:25 AM CDT	Wind Advisory	BIS	19 hr
Apr 9, 3:59 AM CDT	Red Flag Warning	BIS	17 hr
Apr 9, 4:10 AM CDT	Wind Advisory	BIS	14 hr
Apr 10, 11:14 AM CDT	Wind Advisory	BIS	5 hr
Apr 15, 1:05 AM CDT	Special Weather Statement	BIS	40 min
Apr 15, 1:40 AM CDT	Special Weather Statement	BIS	50 min
Apr 15, 2:29 AM CDT	Special Weather Statement	BIS	46 min
Apr 20, 12:04 AM CDT	Dense Fog Advisory	BIS	11 hr
May 13, 3:59 AM CDT	Freeze Warning	BIS	29 hr
May 14, 3:07 PM CDT	Freeze Warning	BIS	18 hr
May 15, 3:41 PM CDT	Frost Advisory	BIS	16 hr
May 22, 3:57 PM CDT	Mesoscale Discussion	SPC	93 min
May 22, 5:21 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 22, 9:06 PM CDT	Mesoscale Discussion	SPC	114 min
May 25, 4:24 PM CDT	Special Weather Statement	BIS	51 min
May 26, 3:30 PM CDT	Special Weather Statement	BIS	60 min
May 28, 5:28 PM CDT	Special Weather Statement	BIS	62 min
May 30, 1:16 PM CDT	Special Weather Statement	BIS	44 min
May 30, 2:53 PM CDT	Special Weather Statement	BIS	37 min
Jun 2, 3:03 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 2, 5:04 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 2, 6:27 PM CDT	Special Weather Statement	BIS	48 min
Jun 9, 7:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 9, 10:25 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 9, 10:58 PM CDT	Special Weather Statement	BIS	47 min
Jun 11, 7:41 AM CDT	Severe Thunderstorm Warning	BIS	64 min
Jun 11, 6:51 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 11, 8:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 11, 11:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jun 16, 6:16 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 17, 1:26 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 17, 3:23 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 17, 3:28 AM CDT	Severe Thunderstorm Warning	BIS	47 min
Jun 17, 3:58 AM CDT	Severe Thunderstorm Warning	BIS	62 min
Jun 21, 2:46 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 21, 8:35 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 21, 11:16 PM CDT	Severe Thunderstorm Warning	BIS	59 min
Jun 21, 11:30 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 22, 12:07 AM CDT	Severe Thunderstorm Warning	BIS	38 min
Jun 24, 3:34 PM CDT	Wind Advisory	BIS	29 hr
Jun 24, 10:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 25, 12:04 AM CDT	Mesoscale Discussion	SPC	116 min
Jun 25, 12:13 AM CDT	Special Weather Statement	BIS	62 min
Jun 29, 1:13 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 3, 3:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 5:45 PM CDT	Severe Thunderstorm Warning	BIS	60 min
Jul 3, 6:44 PM CDT	Severe Thunderstorm Warning	BIS	61 min
Jul 3, 7:52 PM CDT	Special Weather Statement	BIS	38 min
Jul 10, 1:47 AM CDT	Severe Thunderstorm Warning	BIS	58 min
Jul 10, 2:45 AM CDT	Severe Thunderstorm Warning	BIS	60 min
Jul 10, 4:53 PM CDT	Mesoscale Discussion	SPC	67 min
Jul 10, 5:19 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 10, 6:36 PM CDT	Severe Thunderstorm Warning	BIS	54 min
Jul 10, 7:35 PM CDT	Mesoscale Discussion	SPC	55 min
Jul 10, 7:43 PM CDT	Special Weather Statement	BIS	47 min
Jul 10, 7:55 PM CDT	Severe Thunderstorm Warning	BIS	65 min
Jul 12, 4:20 AM CDT	Wind Advisory	BIS	16 hr
Jul 16, 10:42 AM CDT	Special Weather Statement	BIS	48 min
Jul 16, 11:21 AM CDT	Severe Thunderstorm Warning	BIS	39 min
Jul 16, 12:49 PM CDT	Severe Thunderstorm Warning	BIS	41 min
Jul 18, 2:50 PM CDT	Heat Advisory	BIS	29 hr
Jul 19, 8:15 PM CDT	Heat Advisory	BIS	24 hr
Jul 20, 2:24 PM CDT	Excessive Heat Warning	BIS	6 hr
Jul 20, 3:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 20, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 20, 7:48 PM CDT	Severe Thunderstorm Warning	BIS	42 min
Jul 20, 8:14 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 20, 8:27 PM CDT	Severe Thunderstorm Warning	BIS	48 min
Jul 20, 8:30 PM CDT	Severe Thunderstorm Warning	BIS	60 min
Jul 20, 9:09 PM CDT	Areal Flood Advisory	BIS	3 hr
Jul 20, 9:27 PM CDT	Severe Thunderstorm Warning	BIS	33 min
Jul 20, 10:39 PM CDT	Special Weather Statement	BIS	51 min
Jul 22, 3:47 AM CDT	Flash Flood Watch	BIS	33 hr
Jul 22, 2:17 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 22, 4:06 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 22, 9:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 30, 4:08 AM CDT	Special Weather Statement	BIS	67 min
Jul 31, 2:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 31, 3:24 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 31, 5:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 31, 8:46 PM CDT	Mesoscale Discussion	SPC	89 min
Aug 3, 2:52 PM CDT	Mesoscale Discussion	SPC	53 min
Aug 3, 3:38 PM CDT	Tornado Watch	SPC	7 hr
Aug 10, 5:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 10, 8:22 PM CDT	Severe Thunderstorm Warning	BIS	53 min
Aug 10, 8:54 PM CDT	Mesoscale Discussion	SPC	66 min
Aug 10, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	45 min
Aug 10, 9:35 PM CDT	Severe Thunderstorm Warning	BIS	55 min
Aug 15, 2:34 PM CDT	Mesoscale Discussion	SPC	116 min
Sep 4, 7:13 AM CDT	Severe Thunderstorm Warning	BIS	62 min
Sep 8, 7:56 PM CDT	Special Weather Statement	BIS	49 min
Sep 8, 8:18 PM CDT	Special Weather Statement	BIS	42 min
Sep 18, 4:00 AM CDT	Wind Advisory	BIS	15 hr
Sep 23, 8:45 PM CDT	Special Weather Statement	BIS	45 min
Sep 24, 5:08 AM CDT	Wind Advisory	BIS	37 hr
Sep 26, 12:35 PM CDT	Frost Advisory	BIS	19 hr
Oct 5, 3:28 AM CDT	Wind Advisory	BIS	16 hr
Oct 5, 3:34 PM CDT	Freeze Warning	BIS	18 hr
Oct 6, 3:54 PM CDT	Freeze Warning	BIS	20 hr
Oct 7, 2:16 PM CDT	Freeze Warning	BIS	19 hr
Oct 9, 11:57 AM CDT	Wind Advisory	BIS	7 hr
Oct 16, 10:55 AM CDT	Wind Advisory	BIS	8 hr
Oct 26, 4:12 AM CDT	Dense Fog Advisory	BIS	6 hr
Oct 30, 2:28 PM CDT	High Wind Watch	BIS	14 hr
Oct 31, 4:57 AM CDT	Wind Advisory	BIS	14 hr
Nov 26, 9:13 PM CST	Winter Storm Watch	BIS	18 hr
Nov 27, 3:26 PM CST	Winter Storm Warning	BIS	68 hr
Dec 5, 4:18 AM CST	Winter Weather Advisory	BIS	29 hr
Dec 5, 3:26 PM CST	Blizzard Warning	BIS	39 hr
Dec 6, 8:54 AM CST	Wind Chill Advisory	BIS	51 hr
Dec 8, 2:33 PM CST	Wind Chill Advisory	BIS	21 hr
Dec 9, 3:22 PM CST	Wind Chill Advisory	BIS	21 hr
Dec 11, 3:21 PM CST	Wind Chill Advisory	BIS	21 hr
Dec 12, 3:37 PM CST	Wind Chill Advisory	BIS	19 hr
Dec 13, 3:39 PM CST	Wind Chill Advisory	BIS	44 hr
Dec 16, 3:56 AM CST	Wind Chill Warning	BIS	56 hr
Dec 20, 2:38 PM CST	Wind Advisory	BIS	27 hr
Dec 22, 3:20 AM CST	Blizzard Watch	BIS	36 hr
Dec 23, 3:37 PM CST	Blizzard Warning	BIS	3 days
Dec 25, 12:56 PM CST	Mesoscale Discussion	SPC	5 hr
Dec 25, 6:33 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 30, 5:40 PM CST	Winter Weather Advisory	BIS	5 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	23
Severe Thunderstorm Watch	12
Tornado Watch	1
Mesoscale Discussion	27
Special Weather Statement	20
Flooding
Flash Flood Watch	1
Areal Flood Advisory	1
Winter
Blizzard Warning	2
Winter Storm Warning	1
Blizzard Watch	1
Winter Storm Watch	1
Freezing Rain Advisory	2
Winter Weather Advisory	3
Heat
Excessive Heat Warning	1
Heat Advisory	2
Cold
Freeze Warning	5
Wind Chill Warning	1
Frost Advisory	2
Wind Chill Advisory	9
Wind and dust
High Wind Warning	1
High Wind Watch	2
Wind Advisory	15
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2015 2017

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.