Alert archive / Wyoming / Fremont County

Weather alerts in Fremont County, Wyoming, 2009

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

Fremont County and its neighbors

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

Alerts: 190
Warnings: 65
Watches: 29
Advisories: 42
Busiest month: July53 alerts
Busiest day: July 27, 200914 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Fremont County in 2009 had a tornado report inside them.

Fremont County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	22	6	73%	11	55%	34 min
Flash flood warnings	1	0	100%	1	0%

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Riverton, WY: tornado warnings	5	0	100%	2	0%
NWS Riverton, WY: severe thunderstorm warnings	77	23	70%	63	56%	22 min
NWS Riverton, WY: flash flood warnings	6	3	50%	6	67%	47 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 1, 3:07 AM MST	High Wind Watch	RIW	12 hr
Jan 1, 11:57 AM MST	Winter Weather Advisory	RIW	47 hr
Jan 1, 3:13 PM MST	High Wind Warning	RIW	27 hr
Jan 4, 1:59 AM MST	High Wind Watch	RIW	24 hr
Jan 4, 3:49 PM MST	High Wind Warning	RIW	25 hr
Jan 6, 1:30 AM MST	High Wind Watch	RIW	20 hr
Jan 6, 1:31 AM MST	Winter Weather Advisory	RIW	40 hr
Jan 6, 3:50 PM MST	Winter Storm Warning	RIW	24 hr
Jan 6, 9:32 PM MST	High Wind Warning	RIW	24 hr
Jan 7, 9:49 PM MST	High Wind Watch	RIW	12 hr
Jan 8, 9:40 AM MST	High Wind Warning	RIW	8 hr
Jan 11, 1:40 PM MST	High Wind Warning	RIW	6 hr
Jan 11, 1:57 PM MST	Winter Weather Advisory	RIW	21 hr
Jan 12, 2:46 PM MST	High Wind Watch	RIW	4 hr
Jan 12, 6:56 PM MST	High Wind Warning	RIW	22 hr
Jan 23, 2:08 PM MST	Winter Storm Watch	RIW	13 hr
Jan 24, 3:14 AM MST	Winter Weather Advisory	RIW	23 hr
Jan 24, 3:45 PM MST	Winter Storm Watch	RIW	24 hr
Jan 25, 9:15 AM MST	Winter Weather Advisory	RIW	20 hr
Jan 25, 3:42 PM MST	Winter Storm Warning	RIW	23 hr
Jan 26, 2:31 PM MST	Winter Storm Watch	RIW	25 hr
Jan 26, 2:43 PM MST	High Wind Watch	RIW	25 hr
Jan 27, 1:43 AM MST	Winter Weather Advisory	RIW	36 hr
Jan 27, 3:35 PM MST	High Wind Warning	RIW	16 hr
Feb 17, 2:39 AM MST	Winter Weather Advisory	RIW	45 hr
Feb 20, 1:16 AM MST	Winter Weather Advisory	RIW	13 hr
Feb 23, 1:10 AM MST	Winter Weather Advisory	RIW	35 hr
Feb 25, 2:21 PM MST	Winter Weather Advisory	RIW	12 hr
Feb 26, 2:18 AM MST	Winter Weather Advisory	RIW	27 hr
Mar 4, 8:08 AM MST	Winter Storm Warning	RIW	16 hr
Mar 7, 3:27 PM MST	Winter Storm Watch	RIW	23 hr
Mar 8, 3:54 PM MDT	Winter Storm Warning	RIW	35 hr
Mar 8, 3:54 PM MDT	Winter Weather Advisory	RIW	32 hr
Mar 9, 8:49 PM MDT	Mesoscale Discussion	SPC	4 hr
Mar 10, 3:21 PM MDT	Winter Weather Advisory	RIW	6 hr
Mar 14, 3:00 PM MDT	Winter Storm Watch	RIW	25 hr
Mar 15, 3:46 PM MDT	Winter Storm Warning	RIW	35 hr
Mar 21, 3:07 PM MDT	Winter Storm Watch	RIW	24 hr
Mar 22, 3:12 PM MDT	Winter Storm Warning	RIW	33 hr
Mar 22, 3:12 PM MDT	Winter Weather Advisory	RIW	23 hr
Mar 23, 3:59 AM MDT	Mesoscale Discussion	SPC	6 hr
Mar 24, 3:30 AM MDT	Winter Storm Watch	RIW	35 hr
Mar 25, 3:29 AM MDT	Winter Storm Warning	RIW	39 hr
Mar 25, 3:29 AM MDT	Winter Weather Advisory	RIW	39 hr
Mar 28, 2:53 AM MDT	Winter Storm Watch	RIW	34 hr
Mar 28, 11:44 AM MDT	Winter Weather Advisory	RIW	33 hr
Mar 28, 9:41 PM MDT	Winter Storm Warning	RIW	41 hr
Mar 29, 12:55 PM MDT	Winter Storm Warning	RIW	21 hr
Mar 29, 12:55 PM MDT	Winter Weather Advisory	RIW	8 hr
Mar 29, 9:03 PM MDT	Mesoscale Discussion	SPC	6 hr
Mar 31, 12:27 AM MDT	Winter Weather Advisory	RIW	42 hr
Mar 31, 9:14 PM MDT	Winter Storm Warning	RIW	5 hr
Apr 2, 12:41 AM MDT	Winter Storm Watch	RIW	25 hr
Apr 2, 12:41 AM MDT	Winter Weather Advisory	RIW	65 hr
Apr 2, 1:08 PM MDT	Winter Storm Warning	RIW	53 hr
Apr 4, 9:52 AM MDT	Blizzard Warning	RIW	8 hr
Apr 8, 11:09 AM MDT	Winter Storm Watch	RIW	3 hr
Apr 8, 2:30 PM MDT	Winter Storm Warning	RIW	20 hr
Apr 13, 1:36 AM MDT	Winter Storm Watch	RIW	23 hr
Apr 14, 12:25 AM MDT	Winter Weather Advisory	RIW	21 hr
Apr 14, 1:02 PM MDT	Winter Storm Watch	RIW	49 hr
Apr 15, 2:03 AM MDT	Winter Storm Warning	RIW	48 hr
Apr 15, 1:33 PM MDT	Winter Weather Advisory	RIW	43 hr
Apr 23, 8:54 PM MDT	Winter Weather Advisory	RIW	18 hr
Apr 25, 3:13 PM MDT	Winter Weather Advisory	RIW	39 hr
Apr 27, 2:13 PM MDT	Winter Weather Advisory	RIW	37 hr
May 31, 12:17 PM MDT	River Flood Warning	RIW	18 days
Jun 2, 6:39 AM MDT	River Flood Warning	RIW	22 days
Jun 6, 2:30 PM MDT	Winter Weather Advisory	RIW	25 hr
Jun 7, 3:40 PM MDT	Freeze Warning	RIW	17 hr
Jun 13, 2:54 PM MDT	Severe Thunderstorm Warning	RIW	51 min
Jun 13, 5:27 PM MDT	Severe Thunderstorm Warning	RIW	29 min
Jun 13, 6:04 PM MDT	Severe Thunderstorm Warning	RIW	41 min
Jun 13, 7:18 PM MDT	Severe Thunderstorm Warning	RIW	42 min
Jun 26, 7:32 PM MDT	Special Weather Statement	RIW	43 min
Jun 27, 2:20 PM MDT	River Flood Warning	RIW	41 hr
Jun 30, 8:35 PM MDT	Special Weather Statement	RIW	40 min
Jul 2, 7:00 PM MDT	Special Weather Statement	RIW	60 min
Jul 2, 8:12 PM MDT	Areal Flood Advisory	RIW	81 min
Jul 3, 4:06 PM MDT	Areal Flood Advisory	RIW	114 min
Jul 4, 3:34 PM MDT	Severe Thunderstorm Warning	RIW	41 min
Jul 4, 4:16 PM MDT	Severe Thunderstorm Warning	RIW	59 min
Jul 4, 5:13 PM MDT	Severe Thunderstorm Warning	RIW	77 min
Jul 4, 6:15 PM MDT	Severe Thunderstorm Warning	RIW	45 min
Jul 4, 6:59 PM MDT	Severe Thunderstorm Warning	RIW	46 min
Jul 4, 7:20 PM MDT	Flash Flood Warning	RIW	3 hr
Jul 4, 7:34 PM MDT	River Flood Warning	RIW	10 hr
Jul 4, 7:34 PM MDT	River Flood Warning	RIW	10 hr
Jul 4, 7:34 PM MDT	River Flood Warning	RIW	36 hr
Jul 5, 4:45 PM MDT	Special Weather Statement	RIW	45 min
Jul 5, 5:03 PM MDT	Special Weather Statement	RIW	42 min
Jul 5, 5:30 PM MDT	Special Weather Statement	RIW	30 min
Jul 5, 5:31 PM MDT	Special Weather Statement	RIW	29 min
Jul 6, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 6:47 PM MDT	Special Weather Statement	RIW	43 min
Jul 12, 4:39 PM MDT	Special Weather Statement	RIW	51 min
Jul 12, 5:35 PM MDT	Special Weather Statement	RIW	40 min
Jul 13, 1:18 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 19, 2:21 PM MDT	Special Weather Statement	RIW	39 min
Jul 20, 5:13 PM MDT	Special Weather Statement	RIW	47 min
Jul 20, 5:21 PM MDT	Severe Thunderstorm Warning	RIW	39 min
Jul 21, 5:48 PM MDT	Special Weather Statement	RIW	57 min
Jul 22, 7:31 PM MDT	Special Weather Statement	RIW	59 min
Jul 24, 3:01 PM MDT	Special Weather Statement	RIW	59 min
Jul 24, 3:37 PM MDT	Special Weather Statement	RIW	53 min
Jul 26, 4:08 PM MDT	Special Weather Statement	RIW	67 min
Jul 26, 8:15 PM MDT	Special Weather Statement	RIW	60 min
Jul 26, 9:09 PM MDT	Special Weather Statement	RIW	81 min
Jul 26, 9:43 PM MDT	Special Weather Statement	RIW	47 min
Jul 26, 10:04 PM MDT	Special Weather Statement	RIW	71 min
Jul 27, 1:10 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 27, 2:19 PM MDT	Tornado Warning	RIW	41 min
Jul 27, 2:59 PM MDT	Severe Thunderstorm Warning	RIW	61 min
Jul 27, 3:48 PM MDT	Severe Thunderstorm Warning	RIW	42 min
Jul 27, 4:32 PM MDT	Special Weather Statement	RIW	43 min
Jul 27, 4:55 PM MDT	Special Weather Statement	RIW	50 min
Jul 27, 5:08 PM MDT	Severe Thunderstorm Warning	RIW	67 min
Jul 27, 5:30 PM MDT	Special Weather Statement	RIW	45 min
Jul 27, 5:51 PM MDT	Severe Thunderstorm Warning	RIW	54 min
Jul 27, 5:53 PM MDT	Severe Thunderstorm Warning	RIW	37 min
Jul 28, 3:31 PM MDT	Special Weather Statement	RIW	59 min
Jul 28, 4:18 PM MDT	Special Weather Statement	RIW	42 min
Jul 28, 4:22 PM MDT	Severe Thunderstorm Warning	RIW	53 min
Jul 28, 5:07 PM MDT	Severe Thunderstorm Warning	RIW	53 min
Jul 28, 5:17 PM MDT	Special Weather Statement	RIW	58 min
Jul 28, 5:49 PM MDT	Severe Thunderstorm Warning	RIW	56 min
Jul 28, 6:40 PM MDT	Severe Thunderstorm Warning	RIW	48 min
Jul 31, 1:54 PM MDT	Special Weather Statement	RIW	66 min
Jul 31, 2:47 PM MDT	Special Weather Statement	RIW	58 min
Aug 2, 8:08 PM MDT	Special Weather Statement	RIW	37 min
Aug 3, 3:45 PM MDT	Special Weather Statement	RIW	45 min
Aug 3, 4:53 PM MDT	Special Weather Statement	RIW	37 min
Aug 3, 8:01 PM MDT	Special Weather Statement	RIW	59 min
Aug 4, 5:40 PM MDT	Special Weather Statement	RIW	35 min
Aug 6, 2:16 PM MDT	Mesoscale Discussion	SPC	59 min
Aug 8, 2:24 AM MDT	Severe Thunderstorm Warning	RIW	37 min
Aug 8, 3:24 PM MDT	Special Weather Statement	RIW	51 min
Aug 15, 3:09 AM MDT	Winter Weather Advisory	RIW	12 hr
Aug 15, 4:37 PM MDT	Special Weather Statement	RIW	38 min
Aug 15, 5:13 PM MDT	Special Weather Statement	RIW	62 min
Aug 15, 5:57 PM MDT	Severe Thunderstorm Warning	RIW	63 min
Aug 15, 7:03 PM MDT	Special Weather Statement	RIW	57 min
Aug 15, 7:07 PM MDT	Severe Thunderstorm Warning	RIW	53 min
Aug 16, 2:01 PM MDT	Special Weather Statement	RIW	44 min
Aug 24, 2:21 PM MDT	Special Weather Statement	RIW	54 min
Aug 24, 3:25 PM MDT	Special Weather Statement	RIW	50 min
Aug 24, 3:30 PM MDT	Special Weather Statement	RIW	45 min
Aug 25, 12:14 PM MDT	Special Weather Statement	RIW	46 min
Sep 1, 1:49 PM MDT	Red Flag Warning	RIW	4 hr
Sep 16, 3:40 PM MDT	Special Weather Statement	RIW	50 min
Sep 20, 2:39 PM MDT	Freeze Warning	RIW	18 hr
Sep 20, 2:56 PM MDT	Special Weather Statement	RIW	49 min
Sep 20, 3:35 PM MDT	Special Weather Statement	RIW	40 min
Sep 20, 9:40 PM MDT	Freeze Watch	RIW	17 hr
Sep 21, 2:53 PM MDT	Freeze Warning	RIW	18 hr
Sep 25, 2:31 PM MDT	Fire Weather Watch	RIW	10 hr
Sep 26, 12:20 AM MDT	Red Flag Warning	RIW	21 hr
Sep 28, 2:46 PM MDT	Fire Weather Watch	RIW	12 hr
Sep 29, 2:46 AM MDT	Red Flag Warning	RIW	18 hr
Sep 29, 9:23 PM MDT	High Wind Warning	RIW	13 hr
Sep 30, 2:57 AM MDT	Winter Storm Watch	RIW	9 hr
Sep 30, 2:57 AM MDT	Winter Weather Advisory	RIW	29 hr
Sep 30, 1:10 PM MDT	Special Weather Statement	RIW	35 min
Sep 30, 1:35 PM MDT	Special Weather Statement	RIW	40 min
Oct 1, 2:33 AM MDT	Freeze Watch	RIW	13 hr
Oct 1, 3:36 PM MDT	Freeze Warning	RIW	17 hr
Oct 3, 2:01 AM MDT	Winter Storm Watch	RIW	29 hr
Oct 4, 3:55 AM MDT	Winter Storm Warning	RIW	32 hr
Oct 4, 3:55 AM MDT	Winter Weather Advisory	RIW	38 hr
Oct 7, 2:42 PM MDT	Winter Weather Advisory	RIW	18 hr
Oct 8, 2:37 PM MDT	Winter Weather Advisory	RIW	33 hr
Oct 10, 3:19 PM MDT	Winter Weather Advisory	RIW	27 hr
Oct 25, 2:10 PM MDT	High Wind Watch	RIW	34 hr
Oct 27, 3:42 PM MDT	Winter Storm Warning	RIW	35 hr
Oct 28, 12:45 PM MDT	Winter Weather Advisory	RIW	14 hr
Oct 29, 9:55 PM MDT	Winter Weather Advisory	RIW	12 hr
Nov 5, 2:03 PM MST	High Wind Watch	RIW	6 hr
Nov 6, 1:31 PM MST	High Wind Warning	RIW	3 hr
Nov 11, 2:19 AM MST	Winter Weather Advisory	RIW	33 hr
Nov 11, 7:03 PM MST	High Wind Warning	RIW	13 hr
Dec 5, 11:01 AM MST	Winter Weather Advisory	RIW	28 hr
Dec 11, 1:38 PM MST	Winter Storm Watch	RIW	20 hr
Dec 12, 10:07 AM MST	Winter Storm Warning	RIW	40 hr
Dec 12, 10:07 AM MST	Winter Weather Advisory	RIW	40 hr
Dec 14, 3:16 PM MST	High Wind Watch	RIW	11 hr
Dec 15, 1:58 AM MST	High Wind Warning	RIW	21 hr
Dec 18, 6:42 PM MST	Dense Fog Advisory	RIW	16 hr
Dec 22, 10:08 PM MST	Winter Weather Advisory	RIW	25 hr
Dec 25, 2:40 AM MST	Winter Weather Advisory	RIW	36 hr
Dec 27, 7:37 PM MST	Dense Fog Advisory	RIW	16 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	22
Tornado Warning	1
Severe Thunderstorm Watch	1
Mesoscale Discussion	6
Special Weather Statement	48
Flooding
Flash Flood Warning	1
River Flood Warning	6
Areal Flood Advisory	2
Winter
Blizzard Warning	1
Winter Storm Warning	16
Winter Storm Watch	15
Winter Weather Advisory	38
Cold
Freeze Warning	4
Freeze Watch	2
Wind and dust
High Wind Warning	11
High Wind Watch	9
Fire
Red Flag Warning	3
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	2

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.