Alert archive / North Dakota / Rolette County

Weather alerts in Rolette County, North Dakota, 2009

106 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Rolette County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 106
Warnings: 31
Watches: 21
Advisories: 47
Busiest month: January18 alerts
Busiest day: March 22, 20097 alerts

Over time

By month

Warning verification

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

Rolette County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	7	0	100%	0
Flash flood warnings	1	1	0%	1	100%	67 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Bismarck, ND: tornado warnings	56	11	80%	19	79%	13 min
NWS Bismarck, ND: severe thunderstorm warnings	180	61	66%	124	70%	23 min
NWS Bismarck, ND: flash flood warnings	15	2	87%	2	100%	46 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 1, 3:59 PM CST	Winter Storm Watch	BIS	13 hr
Jan 2, 5:09 AM CST	Winter Storm Warning	BIS	24 hr
Jan 3, 5:12 AM CST	Winter Weather Advisory	BIS	16 hr
Jan 3, 3:29 PM CST	Wind Chill Advisory	BIS	25 hr
Jan 7, 5:20 AM CST	Winter Storm Watch	BIS	23 hr
Jan 7, 3:42 PM CST	Winter Storm Warning	BIS	48 hr
Jan 10, 3:05 PM CST	Blizzard Watch	BIS	13 hr
Jan 11, 4:25 AM CST	Blizzard Warning	BIS	32 hr
Jan 13, 4:51 AM CST	Wind Chill Advisory	BIS	34 hr
Jan 14, 11:23 AM CST	Wind Chill Warning	BIS	7 hr
Jan 15, 4:10 AM CST	Wind Chill Warning	BIS	7 hr
Jan 16, 8:52 PM CST	Winter Weather Advisory	BIS	31 hr
Jan 22, 6:07 AM CST	Dense Fog Advisory	BIS	6 hr
Jan 22, 4:03 PM CST	Wind Chill Advisory	BIS	4 days
Jan 22, 4:03 PM CST	Winter Weather Advisory	BIS	14 hr
Jan 30, 3:03 PM CST	Blizzard Watch	BIS	14 hr
Jan 31, 4:43 AM CST	High Wind Warning	BIS	13 hr
Jan 31, 4:43 AM CST	Wind Advisory	BIS	17 hr
Feb 1, 4:14 AM CST	Wind Advisory	BIS	15 hr
Feb 1, 9:11 PM CST	Wind Chill Advisory	BIS	24 hr
Feb 7, 3:58 PM CST	Winter Storm Watch	BIS	24 hr
Feb 8, 4:15 PM CST	Ice Storm Warning	BIS	19 hr
Feb 8, 4:15 PM CST	Winter Storm Warning	BIS	59 hr
Feb 9, 12:12 AM CST	Mesoscale Discussion	SPC	3 hr
Feb 9, 10:57 AM CST	Dense Fog Advisory	BIS	10 hr
Feb 10, 3:56 AM CST	Winter Weather Advisory	BIS	23 hr
Feb 20, 4:00 AM CST	Winter Weather Advisory	BIS	17 hr
Feb 23, 3:58 PM CST	Winter Weather Advisory	BIS	23 hr
Feb 25, 3:21 PM CST	Wind Chill Advisory	BIS	21 hr
Feb 26, 4:00 PM CST	Wind Chill Advisory	BIS	20 hr
Feb 27, 5:46 PM CST	Wind Chill Advisory	BIS	16 hr
Mar 9, 4:26 AM CDT	Wind Chill Watch	BIS	12 hr
Mar 9, 4:25 PM CDT	Winter Weather Advisory	BIS	27 hr
Mar 10, 4:18 PM CDT	Wind Chill Warning	BIS	20 hr
Mar 11, 11:55 AM CDT	Wind Chill Advisory	BIS	24 hr
Mar 20, 3:09 PM CDT	Flood Watch	BIS	4 days
Mar 22, 3:30 AM CDT	Areal Flood Advisory	BIS	86 days
Mar 22, 5:05 AM CDT	Wind Advisory	BIS	16 hr
Mar 22, 9:54 AM CDT	Severe Thunderstorm Warning	BIS	51 min
Mar 22, 10:22 AM CDT	Areal Flood Warning	BIS	5 days
Mar 22, 10:48 AM CDT	Severe Thunderstorm Warning	BIS	57 min
Mar 22, 5:04 PM CDT	Blizzard Warning	BIS	50 hr
Mar 22, 5:04 PM CDT	Winter Storm Watch	BIS	23 hr
Mar 22, 10:03 PM CDT	Dense Fog Advisory	BIS	156 days
Mar 22, 10:03 PM CDT	Dense Fog Advisory	BIS	12 hr
Mar 24, 7:03 PM CDT	Winter Weather Advisory	BIS	9 hr
Mar 25, 4:53 AM CDT	Winter Weather Advisory	BIS	6 hr
Mar 25, 4:04 PM CDT	Winter Weather Advisory	BIS	12 hr
Mar 26, 12:43 PM CDT	Winter Weather Advisory	BIS	7 hr
Apr 12, 1:21 PM CDT	Areal Flood Warning	BIS	8 days
Apr 21, 4:25 AM CDT	Areal Flood Warning	BIS	11 hr
Apr 21, 3:02 PM CDT	Areal Flood Warning	BIS	48 hr
May 12, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 13, 3:27 AM CDT	Wind Advisory	BIS	18 hr
May 14, 3:15 PM CDT	Freeze Watch	BIS	25 hr
May 15, 3:46 PM CDT	Freeze Warning	BIS	17 hr
May 17, 4:57 AM CDT	Freeze Watch	BIS	35 hr
May 18, 4:09 PM CDT	Freeze Warning	BIS	17 hr
May 22, 3:45 PM CDT	Frost Advisory	BIS	17 hr
Jun 2, 3:32 PM CDT	Frost Advisory	BIS	16 hr
Jun 18, 5:56 PM CDT	Severe Thunderstorm Warning	BIS	49 min
Jun 18, 6:45 PM CDT	Severe Thunderstorm Warning	BIS	51 min
Jun 18, 7:33 PM CDT	Flash Flood Warning	BIS	6 hr
Jun 19, 1:32 AM CDT	Areal Flood Advisory	BIS	8 hr
Jun 22, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 26, 4:25 AM CDT	Flash Flood Watch	BIS	24 hr
Jun 26, 2:13 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 26, 2:39 PM CDT	Severe Thunderstorm Warning	BIS	32 min
Jun 26, 2:53 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 27, 1:39 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 27, 3:15 PM CDT	Severe Thunderstorm Warning	BIS	50 min
Jul 14, 2:56 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 14, 4:07 AM CDT	Severe Thunderstorm Warning	BIS	33 min
Aug 14, 10:25 AM CDT	Mesoscale Discussion	SPC	95 min
Aug 24, 1:27 AM CDT	Mesoscale Discussion	SPC	33 min
Aug 24, 1:48 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 24, 4:32 AM CDT	Mesoscale Discussion	SPC	58 min
Sep 10, 4:53 PM CDT	Mesoscale Discussion	SPC	97 min
Sep 10, 7:29 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 13, 4:45 AM CDT	Dense Fog Advisory	BIS	4 hr
Sep 13, 9:16 AM CDT	Dense Fog Advisory	BIS	104 min
Sep 26, 3:20 PM CDT	Wind Advisory	BIS	30 hr
Sep 28, 3:38 AM CDT	Frost Advisory	BIS	29 hr
Oct 5, 4:14 AM CDT	Freeze Watch	BIS	12 hr
Oct 5, 4:14 PM CDT	Freeze Warning	BIS	18 hr
Oct 7, 4:18 AM CDT	Freeze Watch	BIS	11 hr
Oct 7, 3:19 PM CDT	Freeze Warning	BIS	21 hr
Oct 8, 4:54 AM CDT	Freeze Warning	BIS	29 hr
Oct 14, 4:55 AM CDT	Winter Weather Advisory	BIS	31 hr
Nov 30, 3:45 PM CST	Winter Weather Advisory	BIS	26 hr
Dec 8, 2:15 PM CST	Wind Chill Advisory	BIS	44 hr
Dec 10, 2:18 PM CST	Wind Chill Advisory	BIS	14 hr
Dec 12, 4:57 AM CST	Wind Chill Advisory	BIS	31 hr
Dec 12, 8:52 PM CST	Wind Chill Warning	BIS	15 hr
Dec 12, 8:52 PM CST	Wind Chill Advisory	BIS	39 hr
Dec 14, 4:04 PM CST	Wind Chill Warning	BIS	20 hr
Dec 15, 12:54 PM CST	Wind Chill Advisory	BIS	3 hr
Dec 16, 10:30 PM CST	Freezing Rain Advisory	BIS	6 hr
Dec 17, 7:28 PM CST	Freezing Fog Advisory	BIS	9 hr
Dec 18, 8:23 PM CST	Freezing Fog Advisory	BIS	15 hr
Dec 20, 3:43 AM CST	Freezing Fog Advisory	BIS	11 hr
Dec 22, 3:44 AM CST	Winter Storm Watch	BIS	24 hr
Dec 23, 3:15 AM CST	Blizzard Watch	BIS	37 hr
Dec 23, 3:15 AM CST	Winter Storm Warning	BIS	51 hr
Dec 23, 3:15 AM CST	Winter Weather Advisory	BIS	4 days
Dec 24, 3:17 AM CST	Blizzard Warning	BIS	68 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	6
Mesoscale Discussion	7
Flooding
Areal Flood Warning	4
Flash Flood Warning	1
Flash Flood Watch	1
Flood Watch	1
Areal Flood Advisory	2
Winter
Blizzard Warning	3
Ice Storm Warning	1
Winter Storm Warning	4
Blizzard Watch	3
Winter Storm Watch	5
Freezing Rain Advisory	1
Winter Weather Advisory	14
Cold
Freeze Warning	5
Wind Chill Warning	5
Freeze Watch	4
Wind Chill Watch	1
Frost Advisory	3
Wind Chill Advisory	13
Wind and dust
High Wind Warning	1
Wind Advisory	5
Fog and smoke
Dense Fog Advisory	6
Freezing Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2008 2010

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.