Alert archive / North Dakota / Pierce County

Weather alerts in Pierce County, North Dakota, 2016

128 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Pierce County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts: 128
Warnings: 27
Watches: 17
Advisories: 35
Busiest month: July38 alerts
Busiest day: July 20, 20166 alerts

Over time

By month

Warning verification

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

Pierce County, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	12	12	0%	10	100%	21 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 8, 2:53 PM CST	Wind Chill Advisory	BIS	21 hr
Jan 9, 2:39 PM CST	Wind Chill Advisory	BIS	21 hr
Jan 11, 3:25 PM CST	Wind Chill Advisory	BIS	21 hr
Jan 15, 3:51 AM CST	Wind Chill Advisory	BIS	38 hr
Jan 16, 10:13 AM CST	Wind Chill Warning	BIS	23 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 27, 8:46 AM CST	Wind Advisory	BIS	6 hr
Feb 5, 2:44 PM CST	High Wind Warning	BIS	54 hr
Feb 5, 3:53 PM CST	Blizzard Watch	BIS	11 hr
Feb 6, 3:09 AM CST	Blizzard Warning	BIS	24 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
Apr 1, 3:36 AM CDT	Wind Advisory	BIS	24 hr
Apr 5, 8:43 PM CDT	Special Weather Statement	BIS	32 min
Apr 9, 4:10 AM CDT	Wind Advisory	BIS	14 hr
Apr 10, 11:14 AM CDT	Wind Advisory	BIS	5 hr
Apr 16, 4:04 AM CDT	Freezing Rain Advisory	BIS	9 hr
Apr 20, 12:04 AM CDT	Dense Fog Advisory	BIS	11 hr
May 3, 3:27 AM CDT	Red Flag Warning	BIS	17 hr
May 5, 12:45 PM CDT	Red Flag Warning	BIS	7 hr
May 12, 1:45 PM CDT	Frost Advisory	BIS	19 hr
May 13, 3:59 AM CDT	Freeze Warning	BIS	29 hr
May 14, 3:07 PM CDT	Frost Advisory	BIS	18 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 26, 7:07 PM CDT	Special Weather Statement	BIS	53 min
May 31, 7:12 PM CDT	Special Weather Statement	BIS	33 min
May 31, 7:49 PM CDT	Special Weather Statement	BIS	56 min
Jun 3, 1:28 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 9, 7:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 9, 11:40 PM CDT	Severe Thunderstorm Warning	BIS	65 min
Jun 10, 12:40 AM CDT	Severe Thunderstorm Warning	BIS	65 min
Jun 11, 11:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jun 12, 12:27 AM CDT	Special Weather Statement	BIS	48 min
Jun 18, 9:58 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 18, 10:20 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 19, 1:46 AM CDT	Mesoscale Discussion	SPC	89 min
Jun 19, 2:47 AM CDT	Severe Thunderstorm Warning	BIS	58 min
Jun 24, 9:54 PM CDT	Mesoscale Discussion	SPC	96 min
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, 12:58 AM CDT	Special Weather Statement	BIS	47 min
Jun 29, 5:50 PM CDT	Special Weather Statement	BIS	40 min
Jul 4, 1:34 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 2:49 PM CDT	Special Weather Statement	BIS	41 min
Jul 4, 2:53 PM CDT	Severe Thunderstorm Warning	BIS	67 min
Jul 4, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 4, 5:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jul 4, 8:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 5, 5:48 PM CDT	Severe Thunderstorm Warning	BIS	45 min
Jul 5, 6:39 PM CDT	Special Weather Statement	BIS	36 min
Jul 5, 6:58 PM CDT	Special Weather Statement	BIS	17 min
Jul 5, 7:00 PM CDT	Special Weather Statement	FGF	45 min
Jul 7, 5:15 PM CDT	Special Weather Statement	BIS	30 min
Jul 7, 6:00 PM CDT	Special Weather Statement	BIS	45 min
Jul 9, 3:21 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 9, 7:58 PM CDT	Special Weather Statement	BIS	47 min
Jul 10, 5:19 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 10, 7:35 PM CDT	Mesoscale Discussion	SPC	55 min
Jul 10, 9:46 PM CDT	Special Weather Statement	BIS	44 min
Jul 10, 10:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 12, 4:20 AM CDT	Wind Advisory	BIS	16 hr
Jul 19, 12:34 PM CDT	Special Weather Statement	BIS	26 min
Jul 19, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 19, 8:15 PM CDT	Heat Advisory	BIS	24 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, 5:39 PM CDT	Tornado Watch	SPC	5 hr
Jul 20, 5:43 PM CDT	Mesoscale Discussion	SPC	62 min
Jul 20, 6:42 PM CDT	Severe Thunderstorm Warning	BIS	63 min
Jul 20, 7:41 PM CDT	Severe Thunderstorm Warning	BIS	64 min
Jul 20, 8:14 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 20, 8:39 PM CDT	Severe Thunderstorm Warning	BIS	43 min
Jul 22, 3:47 AM CDT	Flash Flood Watch	BIS	33 hr
Jul 22, 4:06 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 31, 4:39 AM CDT	Special Weather Statement	BIS	66 min
Jul 31, 5:28 AM CDT	Special Weather Statement	BIS	47 min
Jul 31, 7:07 AM CDT	Special Weather Statement	BIS	23 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 3, 3:58 PM CDT	Severe Thunderstorm Warning	BIS	62 min
Aug 3, 5:00 PM CDT	Severe Thunderstorm Warning	BIS	60 min
Aug 3, 5:58 PM CDT	Severe Thunderstorm Warning	BIS	45 min
Aug 3, 6:29 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 10, 5:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 10, 8:54 PM CDT	Mesoscale Discussion	SPC	66 min
Sep 4, 4:53 AM CDT	Severe Thunderstorm Warning	BIS	26 min
Sep 4, 7:55 AM CDT	Special Weather Statement	BIS	35 min
Sep 13, 12:30 PM CDT	Frost Advisory	BIS	20 hr
Sep 23, 11:16 PM CDT	Special Weather Statement	BIS	29 min
Sep 24, 5:08 AM CDT	Wind Advisory	BIS	37 hr
Sep 26, 12:35 PM CDT	Frost Advisory	BIS	19 hr
Oct 3, 6:07 AM CDT	Special Weather Statement	BIS	38 min
Oct 3, 6:40 AM CDT	Special Weather Statement	BIS	50 min
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, 9:56 PM CDT	Special Weather Statement	BIS	19 min
Oct 27, 5:08 AM CDT	Dense Fog Advisory	BIS	5 hr
Nov 3, 7:48 AM CDT	Dense Fog Advisory	BIS	6 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 Storm Warning	BIS	20 hr
Dec 5, 3:26 PM CST	Blizzard Warning	BIS	39 hr
Dec 7, 3:56 AM CST	Winter Weather Advisory	BIS	17 hr
Dec 7, 3:03 PM CST	Blizzard Warning	BIS	6 hr
Dec 7, 9:35 PM CST	Winter Weather Advisory	BIS	11 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	12
Severe Thunderstorm Watch	11
Tornado Watch	2
Mesoscale Discussion	25
Special Weather Statement	24
Flooding
Flash Flood Watch	1
Winter
Blizzard Warning	4
Winter Storm Warning	2
Blizzard Watch	2
Winter Storm Watch	1
Freezing Rain Advisory	1
Winter Weather Advisory	4
Heat
Heat Advisory	1
Cold
Freeze Warning	4
Wind Chill Warning	2
Frost Advisory	4
Wind Chill Advisory	11
Wind and dust
High Wind Warning	1
Wind Advisory	10
Fire
Red Flag Warning	2
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.