Alert archive / Montana / Ravalli County

Weather alerts in Ravalli County, Montana, 2008

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

Ravalli County and its neighbors

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

Alerts: 134
Warnings: 35
Watches: 22
Advisories: 70
Busiest month: December28 alerts
Busiest day: April 18, 20085 alerts

Over time

By month

Warning verification

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

Ravalli County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	4	3	25%	1	100%	11 min
Flash flood warnings	0			0

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Missoula, MT: severe thunderstorm warnings	38	11	71%	30	67%	17 min
NWS Missoula, MT: flash flood warnings	1	1	0%	9	78%	50 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 3, 3:41 AM MST	Wind Advisory	MSO	42 hr
Jan 7, 4:05 AM MST	Winter Storm Watch	MSO	26 hr
Jan 8, 3:45 AM MST	Heavy Snow Warning	MSO	31 hr
Jan 9, 3:56 AM MST	Winter Storm Watch	MSO	10 hr
Jan 9, 2:00 PM MST	Heavy Snow Warning	MSO	47 hr
Jan 9, 2:00 PM MST	Snow Advisory	MSO	55 hr
Jan 13, 8:50 AM MST	Dense Fog Advisory	MSO	2 hr
Jan 13, 2:30 PM MST	Dense Fog Advisory	MSO	19 hr
Jan 14, 2:00 PM MST	Snow and Blowing Snow Advisory	MSO	27 hr
Jan 14, 2:00 PM MST	Winter Storm Warning	MSO	27 hr
Jan 18, 2:19 PM MST	Snow Advisory	MSO	51 hr
Jan 18, 2:19 PM MST	Winter Weather Advisory	MSO	34 hr
Jan 20, 12:45 AM MST	Blizzard Warning	MSO	4 hr
Jan 20, 4:48 AM MST	Wind Chill Warning	MSO	29 hr
Jan 20, 4:48 AM MST	Wind Chill Advisory	MSO	29 hr
Jan 20, 4:48 AM MST	Winter Weather Advisory	MSO	15 hr
Jan 25, 9:16 PM MST	Heavy Snow Warning	MSO	59 hr
Jan 26, 5:45 AM MST	Dense Fog Advisory	MSO	2 hr
Jan 26, 5:44 PM MST	Winter Weather Advisory	MSO	21 hr
Jan 27, 4:10 AM MST	Snow Advisory	MSO	29 hr
Jan 28, 2:49 PM MST	Snow Advisory	MSO	37 hr
Jan 29, 2:10 PM MST	Winter Storm Watch	MSO	24 hr
Jan 30, 2:03 PM MST	Heavy Snow Warning	MSO	38 hr
Jan 30, 2:03 PM MST	Snow Advisory	MSO	38 hr
Jan 31, 9:14 AM MST	Snow and Blowing Snow Advisory	MSO	9 hr
Jan 31, 3:00 PM MST	Winter Storm Warning	MSO	3 hr
Feb 1, 3:45 AM MST	Heavy Snow Warning	MSO	24 hr
Feb 1, 3:45 AM MST	Snow Advisory	MSO	24 hr
Feb 2, 3:22 AM MST	Snow Advisory	MSO	11 hr
Feb 2, 2:35 PM MST	Snow Advisory	MSO	38 hr
Feb 3, 2:07 PM MST	Winter Storm Watch	MSO	38 hr
Feb 5, 3:48 AM MST	Winter Storm Warning	MSO	31 hr
Feb 5, 2:27 PM MST	Winter Storm Watch	MSO	50 hr
Feb 6, 10:54 AM MST	Winter Storm Warning	MSO	52 hr
Feb 6, 2:30 PM MST	Snow and Blowing Snow Advisory	MSO	56 hr
Feb 6, 2:30 PM MST	Winter Storm Watch	MSO	48 hr
Feb 7, 2:50 PM MST	Snow Advisory	MSO	33 hr
Feb 8, 9:47 AM MST	Heavy Snow Warning	MSO	18 hr
Feb 9, 3:44 AM MST	Snow Advisory	MSO	11 hr
Feb 9, 2:22 PM MST	Snow Advisory	MSO	40 hr
Feb 12, 3:38 AM MST	Winter Weather Advisory	MSO	27 hr
Feb 24, 4:44 PM MST	Snow Advisory	MSO	22 hr
Feb 29, 2:50 PM MST	Snow Advisory	MSO	25 hr
Mar 2, 2:01 PM MST	Winter Storm Watch	MSO	15 hr
Mar 3, 4:55 AM MST	Heavy Snow Warning	MSO	6 hr
Mar 3, 4:55 AM MST	Snow Advisory	MSO	29 hr
Mar 3, 10:26 AM MST	Winter Storm Warning	MSO	36 hr
Mar 4, 4:54 PM MST	Snow Advisory	MSO	6 hr
Mar 12, 2:29 PM MDT	Snow Advisory	MSO	28 hr
Mar 17, 4:55 AM MDT	Winter Storm Watch	MSO	9 hr
Mar 17, 2:08 PM MDT	Snow Advisory	MSO	34 hr
Mar 19, 2:14 PM MDT	Snow Advisory	MSO	16 hr
Mar 20, 3:49 AM MDT	Snow Advisory	MSO	35 hr
Mar 23, 3:56 AM MDT	Snow and Blowing Snow Advisory	MSO	26 hr
Mar 26, 3:06 PM MDT	Heavy Snow Warning	MSO	20 hr
Mar 28, 4:20 AM MDT	Snow Advisory	MSO	34 hr
Mar 30, 3:42 AM MDT	Snow Advisory	MSO	32 hr
Apr 3, 2:18 PM MDT	Winter Storm Watch	MSO	13 hr
Apr 4, 3:11 AM MDT	Snow Advisory	MSO	33 hr
Apr 17, 2:22 PM MDT	Winter Storm Watch	MSO	24 hr
Apr 18, 4:38 AM MDT	Wind Advisory	MSO	16 hr
Apr 18, 2:49 PM MDT	Heavy Snow Warning	MSO	37 hr
Apr 18, 2:49 PM MDT	Snow Advisory	MSO	37 hr
Apr 18, 2:49 PM MDT	Winter Storm Warning	MSO	51 hr
Apr 18, 2:49 PM MDT	Winter Weather Advisory	MSO	13 hr
Apr 29, 10:54 AM MDT	Snow Advisory	MSO	21 hr
May 17, 2:46 PM MDT	River Flood Watch	MSO	24 hr
May 17, 2:46 PM MDT	River Flood Watch	MSO	23 hr
May 18, 12:56 PM MDT	Areal Flood Advisory	MSO	4 days
May 18, 12:56 PM MDT	Areal Flood Advisory	MSO	8 hr
May 18, 1:36 PM MDT	River Flood Warning	MSO	4 days
May 18, 1:36 PM MDT	River Flood Warning	MSO	4 days
May 21, 12:14 PM MDT	River Flood Warning	MSO	2 hr
May 22, 9:37 AM MDT	Snow Advisory	MSO	23 hr
Jun 4, 7:50 AM MDT	Snow Advisory	MSO	13 hr
Jun 9, 2:28 PM MDT	Snow Advisory	MSO	46 hr
Jun 10, 3:41 AM MDT	Heavy Snow Warning	MSO	40 hr
Jun 17, 2:09 PM MDT	Mesoscale Discussion	SPC	66 min
Jul 1, 1:26 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 1:45 PM MDT	Mesoscale Discussion	SPC	60 min
Jul 4, 2:04 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 4, 5:45 PM MDT	Mesoscale Discussion	SPC	60 min
Jul 10, 11:36 AM MDT	Wind Advisory	MSO	10 hr
Jul 22, 2:11 PM MDT	Severe Thunderstorm Warning	MSO	64 min
Jul 23, 6:44 PM MDT	Severe Thunderstorm Warning	MSO	32 min
Jul 30, 2:27 AM MDT	Wind Advisory	MSO	12 hr
Aug 5, 2:32 PM MDT	Fire Weather Watch	MSO	41 hr
Aug 7, 3:45 AM MDT	Red Flag Warning	MSO	29 hr
Aug 9, 11:45 AM MDT	Severe Thunderstorm Warning	MSO	30 min
Aug 9, 11:46 AM MDT	Mesoscale Discussion	SPC	59 min
Aug 9, 12:15 PM MDT	Severe Thunderstorm Warning	MSO	16 min
Aug 9, 12:16 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 9, 5:50 PM MDT	Mesoscale Discussion	SPC	55 min
Aug 17, 1:54 PM MDT	Red Flag Warning	MSO	54 hr
Aug 18, 2:46 PM MDT	Fire Weather Watch	MSO	13 hr
Aug 31, 2:51 PM MDT	Winter Weather Advisory	MSO	23 hr
Oct 9, 2:12 PM MDT	Winter Weather Advisory	MSO	38 hr
Oct 20, 7:23 AM MDT	Dense Fog Advisory	MSO	2 hr
Oct 20, 2:41 PM MDT	Winter Weather Advisory	MSO	19 hr
Nov 3, 2:37 PM MST	Winter Weather Advisory	MSO	29 hr
Nov 8, 7:36 AM MST	Dense Fog Advisory	MSO	3 hr
Nov 9, 8:38 AM MST	Dense Fog Advisory	MSO	82 min
Nov 13, 6:28 AM MST	Areal Flood Advisory	MSO	6 hr
Nov 19, 2:41 PM MST	Wind Advisory	MSO	18 hr
Nov 20, 2:36 PM MST	Winter Weather Advisory	MSO	17 hr
Nov 26, 4:54 AM MST	Freezing Rain Advisory	MSO	3 hr
Dec 1, 6:30 AM MST	Dense Fog Advisory	MSO	3 hr
Dec 1, 2:50 PM MST	Winter Weather Advisory	MSO	26 hr
Dec 5, 7:51 PM MST	Winter Weather Advisory	MSO	4 hr
Dec 5, 11:25 PM MST	Freezing Rain Advisory	MSO	10 hr
Dec 6, 5:20 AM MST	Mesoscale Discussion	SPC	4 hr
Dec 6, 9:38 PM MST	Winter Weather Advisory	MSO	30 hr
Dec 11, 3:41 AM MST	Winter Storm Watch	MSO	49 hr
Dec 11, 6:48 PM MST	Dense Fog Advisory	MSO	16 hr
Dec 12, 3:54 AM MST	Winter Storm Warning	MSO	55 hr
Dec 12, 11:57 AM MST	Winter Weather Advisory	MSO	40 hr
Dec 13, 2:59 PM MST	Wind Chill Warning	MSO	50 hr
Dec 15, 2:40 PM MST	Winter Storm Watch	MSO	55 hr
Dec 16, 1:41 PM MST	Winter Storm Warning	MSO	62 hr
Dec 17, 9:51 PM MST	Winter Weather Advisory	MSO	30 hr
Dec 20, 2:37 AM MST	Winter Storm Watch	MSO	12 hr
Dec 20, 2:35 PM MST	Winter Storm Warning	MSO	44 hr
Dec 20, 2:35 PM MST	Winter Weather Advisory	MSO	50 hr
Dec 23, 3:45 AM MST	Winter Storm Watch	MSO	24 hr
Dec 24, 3:49 AM MST	Winter Storm Warning	MSO	37 hr
Dec 24, 3:49 AM MST	Winter Weather Advisory	MSO	37 hr
Dec 26, 3:46 AM MST	Winter Storm Watch	MSO	11 hr
Dec 26, 2:36 PM MST	Winter Storm Warning	MSO	50 hr
Dec 27, 4:07 AM MST	Winter Weather Advisory	MSO	36 hr
Dec 28, 7:45 PM MST	Winter Storm Warning	MSO	25 hr
Dec 28, 7:45 PM MST	Winter Weather Advisory	MSO	25 hr
Dec 30, 4:15 AM MST	Winter Storm Watch	MSO	15 hr
Dec 30, 2:35 PM MST	Winter Storm Warning	MSO	32 hr
Dec 30, 2:35 PM MST	Winter Weather Advisory	MSO	32 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	4
Severe Thunderstorm Watch	2
Mesoscale Discussion	7
Flooding
River Flood Warning	3
River Flood Watch	2
Areal Flood Advisory	3
Winter
Blizzard Warning	1
Heavy Snow Warning	10
Winter Storm Warning	13
Winter Storm Watch	16
Freezing Rain Advisory	2
Snow Advisory	27
Snow and Blowing Snow Advisory	4
Winter Weather Advisory	20
Cold
Wind Chill Warning	2
Wind Chill Advisory	1
Wind and dust
Wind Advisory	5
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	8

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.