Alert archive / Montana / Sanders County

Weather alerts in Sanders County, Montana, 2016

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

Sanders County and its neighbors

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

Alerts: 121
Warnings: 19
Watches: 10
Advisories: 81
Busiest month: December27 alerts
Busiest day: June 8, 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.

Sanders County, 2016

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	4	3	25%
Flash flood warnings	0

Each office's whole area, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Missoula, MT: severe thunderstorm warnings	19	14	26%	41	46%	12 min
NWS Missoula, MT: flash flood warnings	1	0	100%	0

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 5, 2:08 PM MST	Winter Weather Advisory	MSO	69 hr
Jan 12, 1:24 AM MST	Winter Weather Advisory	MSO	9 hr
Jan 12, 2:16 PM MST	Winter Weather Advisory	MSO	67 hr
Jan 13, 5:13 AM MST	Winter Storm Warning	MSO	5 hr
Jan 14, 10:19 AM MST	Winter Storm Warning	MSO	7 hr
Jan 15, 12:19 PM MST	Winter Weather Advisory	MSO	47 hr
Jan 17, 2:14 PM MST	Freezing Rain Advisory	MSO	19 hr
Jan 19, 4:22 AM MST	Winter Weather Advisory	MSO	34 hr
Jan 22, 5:10 PM MST	Winter Weather Advisory	MSO	3 hr
Jan 23, 1:23 PM MST	Winter Weather Advisory	MSO	21 hr
Jan 28, 5:22 AM MST	Dense Fog Advisory	MSO	4 hr
Jan 29, 4:54 AM MST	Winter Weather Advisory	MSO	28 hr
Jan 30, 10:34 AM MST	Winter Weather Advisory	MSO	33 hr
Jan 31, 8:35 PM MST	Winter Weather Advisory	MSO	49 hr
Feb 2, 11:13 AM MST	Winter Storm Warning	MSO	4 hr
Feb 2, 11:13 AM MST	Winter Weather Advisory	MSO	11 hr
Feb 3, 4:16 AM MST	Winter Weather Advisory	MSO	40 hr
Feb 5, 2:24 PM MST	Winter Weather Advisory	MSO	31 hr
Feb 10, 6:23 AM MST	Freezing Fog Advisory	MSO	5 hr
Feb 12, 6:35 PM MST	Dense Fog Advisory	MSO	4 hr
Feb 13, 2:16 PM MST	Winter Weather Advisory	MSO	46 hr
Feb 18, 9:56 AM MST	Winter Weather Advisory	MSO	23 hr
Feb 19, 12:20 PM MST	Winter Weather Advisory	MSO	28 hr
Feb 28, 11:52 AM MST	Winter Weather Advisory	MSO	21 hr
Mar 1, 10:35 AM MST	Winter Weather Advisory	MSO	24 hr
Mar 1, 10:46 AM MST	Wind Advisory	MSO	21 hr
Mar 3, 7:10 AM MST	Winter Weather Advisory	MSO	4 hr
Mar 10, 2:12 PM MST	Wind Advisory	MSO	5 hr
Mar 12, 12:02 PM MST	Winter Weather Advisory	MSO	17 hr
Mar 13, 2:09 PM MDT	Winter Weather Advisory	MSO	22 hr
Mar 14, 2:18 PM MDT	Winter Weather Advisory	MSO	22 hr
Mar 15, 11:57 PM MDT	Winter Weather Advisory	MSO	9 hr
Mar 16, 1:14 PM MDT	Winter Weather Advisory	MSO	31 hr
Mar 17, 7:33 AM MDT	Winter Storm Warning	MSO	3 hr
Mar 21, 1:35 PM MDT	Winter Weather Advisory	MSO	38 hr
Mar 23, 2:31 PM MDT	Winter Weather Advisory	MSO	53 hr
Mar 27, 9:14 PM MDT	Winter Weather Advisory	MSO	41 hr
Mar 28, 9:57 AM MDT	High Wind Watch	MSO	5 hr
Mar 28, 3:19 PM MDT	Wind Advisory	MSO	29 hr
Apr 3, 8:50 PM MDT	Lake Wind Advisory	MSO	24 hr
May 5, 5:32 PM MDT	Special Weather Statement	MSO	28 min
May 9, 8:25 AM MDT	Lake Wind Advisory	MSO	9 hr
May 12, 10:30 AM MDT	Lake Wind Advisory	MSO	20 hr
May 22, 4:08 AM MDT	Lake Wind Advisory	MSO	17 hr
May 25, 7:50 AM MDT	Dense Fog Advisory	MSO	70 min
Jun 8, 2:16 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 3:07 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 8, 4:52 PM MDT	Severe Thunderstorm Warning	MSO	23 min
Jun 8, 4:57 PM MDT	Severe Thunderstorm Warning	MSO	33 min
Jun 8, 5:14 PM MDT	Special Weather Statement	MSO	31 min
Jun 8, 5:33 PM MDT	Special Weather Statement	MSO	27 min
Jun 8, 5:48 PM MDT	Mesoscale Discussion	SPC	57 min
Jun 8, 6:22 PM MDT	Severe Thunderstorm Warning	MSO	24 min
Jun 8, 6:37 PM MDT	Severe Thunderstorm Warning	MSO	38 min
Jun 17, 2:16 PM MDT	Lake Wind Advisory	MSO	29 hr
Jul 3, 1:43 PM MDT	Lake Wind Advisory	MSO	7 hr
Jul 17, 5:26 PM MDT	Special Weather Statement	MSO	79 min
Jul 19, 6:59 PM MDT	Special Weather Statement	MSO	46 min
Jul 19, 7:48 PM MDT	Special Weather Statement	MSO	42 min
Jul 22, 8:24 AM MDT	Lake Wind Advisory	MSO	13 hr
Jul 31, 8:11 PM MDT	Fire Weather Watch	MSO	16 hr
Aug 1, 12:35 PM MDT	Red Flag Warning	MSO	35 hr
Aug 1, 2:29 PM MDT	Lake Wind Advisory	MSO	31 hr
Aug 3, 3:45 AM MDT	Lake Wind Advisory	MSO	8 hr
Aug 5, 7:01 PM MDT	Special Weather Statement	MSO	29 min
Aug 7, 1:52 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 17, 2:13 PM MDT	Wind Advisory	MSO	40 hr
Aug 18, 10:36 AM MDT	High Wind Warning	MSO	19 hr
Aug 21, 11:02 AM MDT	Red Flag Warning	MSO	34 hr
Aug 22, 8:14 AM MDT	Lake Wind Advisory	MSO	10 hr
Aug 29, 5:18 PM MDT	Special Weather Statement	MSO	42 min
Aug 30, 8:48 AM MDT	Red Flag Warning	MSO	10 hr
Sep 8, 9:23 AM MDT	Lake Wind Advisory	MSO	11 hr
Sep 10, 2:16 PM MDT	Wind Advisory	MSO	38 hr
Sep 12, 2:17 PM MDT	Freeze Warning	MSO	19 hr
Oct 8, 1:55 PM MDT	Winter Storm Watch	MSO	24 hr
Oct 9, 2:05 PM MDT	Winter Weather Advisory	MSO	27 hr
Oct 10, 6:45 AM MDT	Lake Wind Advisory	MSO	7 hr
Oct 10, 10:37 PM MDT	Winter Weather Advisory	MSO	13 hr
Oct 11, 2:26 PM MDT	Freeze Warning	MSO	20 hr
Oct 14, 10:41 AM MDT	Lake Wind Advisory	MSO	7 hr
Oct 27, 6:02 AM MDT	Dense Fog Advisory	MSO	4 hr
Nov 9, 7:19 AM MST	Dense Fog Advisory	MSO	5 hr
Nov 10, 7:07 AM MST	Dense Fog Advisory	MSO	5 hr
Nov 10, 9:28 PM MST	Dense Fog Advisory	MSO	16 hr
Nov 11, 6:13 PM MST	Dense Fog Advisory	MSO	17 hr
Nov 15, 11:12 AM MST	Winter Weather Advisory	MSO	22 hr
Nov 15, 12:39 PM MST	Lake Wind Advisory	MSO	9 hr
Nov 19, 1:03 PM MST	Winter Weather Advisory	MSO	13 hr
Nov 22, 12:15 PM MST	Winter Weather Advisory	MSO	45 hr
Nov 22, 2:37 PM MST	Winter Storm Watch	MSO	23 hr
Nov 23, 2:05 PM MST	Winter Weather Advisory	MSO	44 hr
Nov 27, 3:47 AM MST	Winter Weather Advisory	MSO	40 hr
Nov 29, 1:12 PM MST	Winter Weather Advisory	MSO	62 hr
Dec 2, 2:43 PM MST	Winter Storm Watch	MSO	43 hr
Dec 2, 2:43 PM MST	Winter Weather Advisory	MSO	20 hr
Dec 3, 2:19 PM MST	Winter Storm Warning	MSO	45 hr
Dec 3, 2:19 PM MST	Winter Weather Advisory	MSO	45 hr
Dec 5, 2:21 PM MST	Wind Chill Advisory	MSO	46 hr
Dec 6, 1:00 PM MST	Winter Weather Advisory	MSO	28 hr
Dec 6, 2:38 PM MST	Winter Storm Watch	MSO	43 hr
Dec 8, 10:01 AM MST	Winter Weather Advisory	MSO	23 hr
Dec 9, 12:08 PM MST	Winter Weather Advisory	MSO	23 hr
Dec 10, 2:34 PM MST	Winter Storm Watch	MSO	26 hr
Dec 10, 2:34 PM MST	Winter Weather Advisory	MSO	48 hr
Dec 11, 9:44 AM MST	Winter Storm Warning	MSO	34 hr
Dec 11, 2:00 PM MST	Winter Weather Advisory	MSO	24 hr
Dec 14, 3:24 AM MST	Winter Weather Advisory	MSO	3 days
Dec 15, 5:58 AM MST	Winter Storm Warning	MSO	5 hr
Dec 16, 4:51 PM MST	Wind Chill Advisory	MSO	15 hr
Dec 17, 8:00 AM MST	Lake Effect Snow Advisory	MSO	3 hr
Dec 17, 1:03 PM MST	Lake Effect Snow Advisory	MSO	4 hr
Dec 18, 8:12 AM MST	Winter Weather Advisory	MSO	32 hr
Dec 19, 4:14 AM MST	Winter Storm Watch	MSO	10 hr
Dec 19, 2:01 PM MST	Winter Storm Warning	MSO	28 hr
Dec 19, 2:01 PM MST	Winter Weather Advisory	MSO	34 hr
Dec 22, 2:49 PM MST	Winter Weather Advisory	MSO	71 hr
Dec 26, 3:31 AM MST	Winter Storm Watch	MSO	11 hr
Dec 26, 3:31 AM MST	Winter Weather Advisory	MSO	55 hr
Dec 26, 2:11 PM MST	Winter Storm Warning	MSO	31 hr
Dec 29, 2:52 PM MST	Winter Weather Advisory	MSO	22 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	1
Mesoscale Discussion	3
Special Weather Statement	8
Winter
Winter Storm Warning	9
Winter Storm Watch	7
Freezing Rain Advisory	1
Lake Effect Snow Advisory	2
Winter Weather Advisory	48
Cold
Freeze Warning	2
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
High Wind Watch	1
Lake Wind Advisory	14
Wind Advisory	5
Fire
Red Flag Warning	3
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	8
Freezing Fog Advisory	1

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.