Alert archive / Montana / Powder River County

Weather alerts in Powder River County, Montana, 2008

148 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Powder River County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts: 148
Warnings: 67
Watches: 29
Advisories: 17
Busiest month: July41 alerts
Busiest day: July 6, 200810 alerts

Over time

By month

Warning verification

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

Powder River County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	50	26	48%	27	100%	27 min
Flash flood warnings	3	2	33%	3	67%	209 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Billings, MT: tornado warnings	1	1	0%	2	50%	7 min
NWS Billings, MT: severe thunderstorm warnings	187	80	57%	140	79%	27 min
NWS Billings, MT: flash flood warnings	8	3	63%	6	83%	155 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 14, 3:51 AM MST	High Wind Watch	BYZ	23 hr
Jan 16, 3:09 AM MST	Winter Storm Watch	BYZ	13 hr
Jan 16, 3:41 PM MST	Winter Storm Warning	BYZ	49 hr
Jan 19, 3:28 PM MST	Snow and Blowing Snow Advisory	BYZ	24 hr
Jan 21, 6:33 PM MST	Wind Chill Advisory	BYZ	15 hr
Jan 22, 2:49 PM MST	Snow and Blowing Snow Advisory	BYZ	17 hr
Jan 27, 2:40 PM MST	Winter Weather Advisory	BYZ	31 hr
Jan 28, 9:24 PM MST	Wind Chill Advisory	BYZ	38 hr
Feb 8, 4:00 AM MST	Winter Weather Advisory	BYZ	41 hr
Feb 10, 2:54 PM MST	Snow Advisory	BYZ	24 hr
Feb 16, 6:43 AM MST	Freezing Rain Advisory	BYZ	3 hr
Mar 6, 6:08 AM MST	Snow Advisory	BYZ	15 hr
Mar 25, 2:57 PM MDT	Winter Storm Watch	BYZ	45 hr
Mar 29, 3:54 PM MDT	Winter Storm Watch	BYZ	23 hr
Mar 30, 3:23 PM MDT	Snow Advisory	BYZ	29 hr
Apr 5, 4:13 AM MDT	Snow Advisory	BYZ	24 hr
Apr 19, 9:41 AM MDT	Red Flag Warning	BYZ	11 hr
Apr 28, 3:03 PM MDT	Fire Weather Watch	BYZ	15 hr
Apr 29, 5:59 AM MDT	Red Flag Warning	BYZ	17 hr
Apr 30, 9:40 AM MDT	Winter Storm Watch	BYZ	30 hr
May 1, 4:26 AM MDT	Winter Storm Warning	BYZ	29 hr
May 20, 1:28 PM MDT	Flood Watch	BYZ	5 days
May 22, 9:32 AM MDT	High Wind Warning	BYZ	19 hr
May 24, 10:02 AM MDT	Areal Flood Warning	BYZ	5 days
May 29, 11:24 AM MDT	Mesoscale Discussion	SPC	96 min
Jun 1, 2:42 PM MDT	Severe Thunderstorm Warning	BYZ	33 min
Jun 1, 2:58 PM MDT	Mesoscale Discussion	SPC	92 min
Jun 1, 3:13 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jun 1, 4:12 PM MDT	Severe Thunderstorm Warning	BYZ	63 min
Jun 2, 2:36 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 2, 9:42 PM MDT	Severe Thunderstorm Warning	BYZ	33 min
Jun 10, 3:46 AM MDT	Flash Flood Watch	BYZ	17 hr
Jun 10, 4:21 PM MDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 16, 3:27 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 16, 10:49 PM MDT	Severe Thunderstorm Warning	BYZ	26 min
Jun 16, 11:14 PM MDT	Severe Thunderstorm Warning	BYZ	31 min
Jun 17, 12:40 PM MDT	Mesoscale Discussion	SPC	65 min
Jun 17, 1:27 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 17, 5:48 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 17, 6:29 PM MDT	Mesoscale Discussion	SPC	61 min
Jun 17, 10:16 PM MDT	Mesoscale Discussion	SPC	89 min
Jun 18, 12:41 AM MDT	Severe Thunderstorm Warning	BYZ	64 min
Jun 18, 1:33 AM MDT	Severe Thunderstorm Warning	BYZ	46 min
Jun 18, 3:57 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 18, 4:17 PM MDT	Severe Thunderstorm Warning	BYZ	73 min
Jun 19, 2:25 PM MDT	Severe Thunderstorm Warning	BYZ	51 min
Jun 19, 2:53 PM MDT	Severe Thunderstorm Warning	BYZ	82 min
Jun 19, 2:53 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 19, 3:21 PM MDT	Severe Thunderstorm Warning	BYZ	34 min
Jun 19, 4:15 PM MDT	Severe Thunderstorm Warning	BYZ	60 min
Jun 19, 5:10 PM MDT	Mesoscale Discussion	SPC	65 min
Jun 19, 8:25 PM MDT	Severe Thunderstorm Warning	BYZ	65 min
Jun 22, 4:11 PM MDT	Mesoscale Discussion	SPC	94 min
Jun 22, 6:00 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 22, 8:30 PM MDT	Mesoscale Discussion	SPC	60 min
Jun 23, 4:13 PM MDT	Mesoscale Discussion	SPC	62 min
Jun 25, 3:01 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 25, 7:12 PM MDT	Severe Thunderstorm Warning	BYZ	48 min
Jun 25, 7:49 PM MDT	Severe Thunderstorm Warning	BYZ	41 min
Jun 25, 7:49 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 25, 8:27 PM MDT	Severe Thunderstorm Warning	BYZ	36 min
Jun 25, 11:09 PM MDT	Severe Thunderstorm Warning	BYZ	66 min
Jul 1, 9:24 PM MDT	Mesoscale Discussion	SPC	66 min
Jul 5, 4:25 PM MDT	Mesoscale Discussion	SPC	65 min
Jul 5, 5:19 PM MDT	Severe Thunderstorm Warning	BYZ	56 min
Jul 5, 6:09 PM MDT	Severe Thunderstorm Warning	BYZ	66 min
Jul 5, 7:11 PM MDT	Severe Thunderstorm Warning	BYZ	19 min
Jul 5, 7:34 PM MDT	Severe Thunderstorm Warning	BYZ	56 min
Jul 6, 1:14 PM MDT	Mesoscale Discussion	SPC	61 min
Jul 6, 1:32 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 1:46 PM MDT	Severe Thunderstorm Warning	BYZ	59 min
Jul 6, 2:20 PM MDT	Flash Flood Warning	BYZ	3 hr
Jul 6, 2:44 PM MDT	Severe Thunderstorm Warning	BYZ	45 min
Jul 6, 3:30 PM MDT	Severe Thunderstorm Warning	BYZ	60 min
Jul 6, 4:28 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jul 6, 6:08 PM MDT	Mesoscale Discussion	SPC	67 min
Jul 6, 6:40 PM MDT	Severe Thunderstorm Warning	BYZ	65 min
Jul 6, 7:46 PM MDT	Flash Flood Warning	BYZ	6 hr
Jul 10, 3:39 PM MDT	Red Flag Warning	BYZ	26 hr
Jul 16, 6:51 PM MDT	Severe Thunderstorm Warning	BYZ	54 min
Jul 16, 8:18 PM MDT	Severe Thunderstorm Warning	BYZ	57 min
Jul 18, 12:04 PM MDT	Mesoscale Discussion	SPC	56 min
Jul 18, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 18, 3:32 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 18, 4:33 PM MDT	Severe Thunderstorm Warning	BYZ	72 min
Jul 18, 5:39 PM MDT	Severe Thunderstorm Warning	BYZ	54 min
Jul 22, 3:12 PM MDT	Mesoscale Discussion	SPC	63 min
Jul 22, 3:24 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 22, 4:52 PM MDT	Severe Thunderstorm Warning	BYZ	53 min
Jul 22, 5:21 PM MDT	Flash Flood Warning	BYZ	7 hr
Jul 22, 5:44 PM MDT	Severe Thunderstorm Warning	BYZ	61 min
Jul 22, 8:03 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 22, 9:54 PM MDT	Mesoscale Discussion	SPC	96 min
Jul 22, 10:58 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jul 22, 11:56 PM MDT	Severe Thunderstorm Warning	BYZ	49 min
Jul 23, 12:32 AM MDT	Mesoscale Discussion	SPC	58 min
Jul 24, 1:31 PM MDT	Mesoscale Discussion	SPC	59 min
Jul 24, 2:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 24, 8:22 PM MDT	Severe Thunderstorm Warning	BYZ	53 min
Jul 26, 1:44 PM MDT	Mesoscale Discussion	SPC	61 min
Jul 26, 5:01 PM MDT	Severe Thunderstorm Warning	BYZ	26 min
Jul 26, 8:57 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 26, 10:09 PM MDT	Severe Thunderstorm Watch	SPC	9 min
Aug 2, 8:28 PM MDT	Mesoscale Discussion	SPC	62 min
Aug 2, 10:23 PM MDT	Severe Thunderstorm Warning	BYZ	30 min
Aug 2, 11:05 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 3, 8:03 PM MDT	Mesoscale Discussion	SPC	117 min
Aug 3, 9:49 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 3, 9:56 PM MDT	Severe Thunderstorm Warning	BYZ	64 min
Aug 3, 11:09 PM MDT	Severe Thunderstorm Warning	BYZ	66 min
Aug 3, 11:28 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Aug 4, 12:27 AM MDT	Severe Thunderstorm Warning	BYZ	63 min
Aug 5, 4:43 PM MDT	Mesoscale Discussion	SPC	62 min
Aug 5, 4:55 PM MDT	Severe Thunderstorm Warning	BYZ	65 min
Aug 5, 4:58 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 5, 5:03 PM MDT	Severe Thunderstorm Warning	BYZ	57 min
Aug 5, 5:45 PM MDT	Severe Thunderstorm Warning	BYZ	60 min
Aug 5, 5:55 PM MDT	Severe Thunderstorm Warning	BYZ	30 min
Aug 5, 6:05 PM MDT	Severe Thunderstorm Warning	BYZ	55 min
Aug 5, 6:51 PM MDT	Severe Thunderstorm Warning	BYZ	46 min
Aug 5, 8:40 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 12:46 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 10, 2:54 PM MDT	Severe Thunderstorm Warning	BYZ	64 min
Aug 10, 4:06 PM MDT	Severe Thunderstorm Warning	BYZ	44 min
Aug 10, 4:28 PM MDT	Mesoscale Discussion	SPC	62 min
Aug 21, 2:33 PM MDT	Mesoscale Discussion	SPC	117 min
Aug 25, 3:31 AM MDT	Red Flag Warning	BYZ	38 hr
Aug 27, 3:41 AM MDT	Red Flag Warning	BYZ	17 hr
Aug 29, 4:26 AM MDT	Fire Weather Watch	BYZ	11 hr
Sep 19, 3:06 PM MDT	Fire Weather Watch	BYZ	12 hr
Sep 20, 3:32 AM MDT	Red Flag Warning	BYZ	18 hr
Oct 9, 4:12 AM MDT	Winter Storm Watch	BYZ	12 hr
Oct 9, 4:16 PM MDT	Winter Storm Warning	BYZ	71 hr
Oct 11, 10:29 PM MDT	Mesoscale Discussion	SPC	4 hr
Nov 14, 1:17 PM MST	Mesoscale Discussion	SPC	58 min
Dec 1, 3:42 PM MST	Winter Weather Advisory	BYZ	31 hr
Dec 11, 3:40 PM MST	Winter Storm Watch	BYZ	24 hr
Dec 12, 3:48 PM MST	Blizzard Warning	BYZ	35 hr
Dec 12, 3:48 PM MST	Winter Storm Warning	BYZ	35 hr
Dec 13, 10:35 AM MST	Mesoscale Discussion	SPC	4 hr
Dec 13, 5:29 PM MST	Mesoscale Discussion	SPC	4 hr
Dec 13, 9:16 PM MST	Wind Chill Advisory	BYZ	31 hr
Dec 18, 9:28 PM MST	Winter Weather Advisory	BYZ	24 hr
Dec 19, 9:15 PM MST	Wind Chill Advisory	BYZ	27 hr
Dec 22, 4:20 AM MST	Wind Chill Advisory	BYZ	7 hr
Dec 22, 4:20 AM MST	Winter Weather Advisory	BYZ	35 hr
Dec 25, 2:18 PM MST	Winter Storm Warning	BYZ	31 hr
Dec 26, 10:56 AM MST	Mesoscale Discussion	SPC	4 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	50
Severe Thunderstorm Watch	17
Mesoscale Discussion	35
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
Flash Flood Watch	1
Flood Watch	1
Winter
Blizzard Warning	1
Winter Storm Warning	5
Winter Storm Watch	6
Freezing Rain Advisory	1
Snow Advisory	4
Snow and Blowing Snow Advisory	2
Winter Weather Advisory	5
Cold
Wind Chill Advisory	5
Wind and dust
High Wind Warning	1
High Wind Watch	1
Fire
Red Flag Warning	6
Fire Weather Watch	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 2007 2009

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.