Alert archive / Wyoming / Natrona County

Weather alerts in Natrona County, Wyoming, 2023

235 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Natrona County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 235
Warnings: 74
Watches: 28
Advisories: 33
Busiest month: June69 alerts
Busiest day: September 10, 202315 alerts

Over time

By month

Warning verification

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

3 of 9 tornado warnings covering Natrona County in 2023 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 18 minutes after it went out.

Natrona County, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	9	3	67%	4	100%	18 min
Severe thunderstorm warnings	36	11	69%	30	70%	26 min
Flash flood warnings	3	3	0%	3	67%	79 min

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Riverton, WY: tornado warnings	13	4	69%	6	83%	19 min
NWS Riverton, WY: severe thunderstorm warnings	122	34	72%	98	59%	18 min
NWS Riverton, WY: flash flood warnings	7	3	57%	5	80%	44 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 9, 1:42 AM MST	High Wind Watch	RIW	12 hr
Jan 9, 1:16 PM MST	High Wind Warning	RIW	20 hr
Jan 10, 2:15 PM MST	Winter Weather Advisory	RIW	27 hr
Jan 13, 1:09 PM MST	High Wind Warning	RIW	21 hr
Jan 17, 12:48 AM MST	Winter Weather Advisory	RIW	35 hr
Jan 24, 1:33 PM MST	Winter Weather Advisory	RIW	27 hr
Jan 25, 1:07 PM MST	Winter Storm Watch	RIW	24 hr
Jan 26, 1:14 PM MST	Winter Storm Watch	RIW	13 hr
Jan 26, 1:14 PM MST	Winter Storm Warning	RIW	3 days
Jan 27, 2:31 AM MST	Winter Weather Advisory	RIW	62 hr
Jan 28, 9:57 PM MST	Wind Chill Advisory	RIW	35 hr
Jan 30, 6:47 PM MST	Wind Chill Warning	RIW	14 hr
Feb 8, 1:51 PM MST	Mesoscale Discussion	SPC	4 hr
Feb 8, 1:53 PM MST	Snow Squall Warning	RIW	52 min
Feb 8, 2:43 PM MST	Snow Squall Warning	RIW	47 min
Feb 8, 3:35 PM MST	Snow Squall Warning	RIW	40 min
Feb 8, 4:22 PM MST	Snow Squall Warning	RIW	53 min
Feb 12, 12:43 PM MST	High Wind Watch	RIW	37 hr
Feb 13, 2:37 AM MST	Winter Storm Warning	RIW	50 hr
Feb 13, 2:37 AM MST	Winter Weather Advisory	RIW	50 hr
Feb 15, 3:12 PM MST	Wind Chill Advisory	RIW	18 hr
Feb 16, 7:09 PM MST	Winter Weather Advisory	RIW	22 hr
Feb 19, 8:43 AM MST	Winter Storm Warning	RIW	3 days
Feb 19, 1:11 PM MST	High Wind Watch	RIW	13 hr
Feb 19, 1:52 PM MST	Winter Storm Watch	RIW	13 hr
Feb 20, 2:00 AM MST	High Wind Warning	RIW	36 hr
Feb 20, 2:34 AM MST	Blizzard Warning	RIW	65 hr
Feb 22, 1:50 PM MST	Wind Chill Advisory	RIW	19 hr
Feb 24, 4:59 AM MST	Winter Weather Advisory	RIW	33 hr
Feb 28, 9:06 AM MST	Special Weather Statement	RIW	54 min
Mar 5, 10:35 PM MST	Dense Fog Advisory	RIW	7 hr
Mar 9, 2:47 AM MST	High Wind Watch	RIW	10 hr
Mar 9, 12:34 PM MST	High Wind Warning	RIW	38 hr
Mar 12, 1:40 PM MDT	High Wind Watch	RIW	37 hr
Mar 14, 2:20 AM MDT	High Wind Warning	RIW	37 hr
Mar 21, 1:09 PM MDT	Winter Weather Advisory	RIW	41 hr
Mar 22, 4:26 PM MDT	Special Weather Statement	RIW	49 min
Mar 22, 5:54 PM MDT	Special Weather Statement	RIW	66 min
Mar 22, 6:54 PM MDT	Special Weather Statement	RIW	81 min
Mar 22, 8:15 PM MDT	Special Weather Statement	RIW	45 min
Mar 23, 3:44 PM MDT	Winter Storm Watch	RIW	11 hr
Mar 24, 2:58 AM MDT	Winter Storm Warning	RIW	3 days
Mar 24, 2:58 AM MDT	Winter Weather Advisory	RIW	3 days
Mar 30, 1:23 PM MDT	High Wind Watch	RIW	27 hr
Mar 31, 4:07 PM MDT	High Wind Warning	RIW	29 hr
Apr 1, 3:10 AM MDT	Winter Storm Watch	RIW	34 hr
Apr 2, 2:57 AM MDT	Winter Storm Warning	RIW	63 hr
Apr 3, 2:43 PM MDT	Blizzard Warning	RIW	27 hr
Apr 6, 8:03 AM MDT	Winter Weather Advisory	RIW	13 hr
Apr 18, 4:46 PM MDT	Mesoscale Discussion	SPC	2 hr
Apr 19, 11:18 AM MDT	Winter Weather Advisory	RIW	34 hr
Apr 26, 4:07 PM MDT	Winter Weather Advisory	RIW	28 hr
Apr 27, 11:42 AM MDT	Mesoscale Discussion	SPC	2 hr
Apr 27, 1:45 PM MDT	Special Weather Statement	RIW	45 min
May 9, 11:44 AM MDT	Flood Watch	RIW	57 hr
May 10, 2:02 PM MDT	Mesoscale Discussion	SPC	88 min
May 10, 3:37 PM MDT	Special Weather Statement	RIW	23 min
May 10, 4:34 PM MDT	Special Weather Statement	RIW	26 min
May 10, 5:48 PM MDT	Special Weather Statement	RIW	42 min
May 10, 7:20 PM MDT	Areal Flood Advisory	RIW	6 hr
May 11, 4:45 PM MDT	Areal Flood Advisory	RIW	44 hr
May 17, 12:56 PM MDT	Special Weather Statement	RIW	49 min
May 17, 1:41 PM MDT	Special Weather Statement	RIW	49 min
May 17, 1:59 PM MDT	Severe Thunderstorm Warning	RIW	46 min
May 17, 2:40 PM MDT	Special Weather Statement	RIW	35 min
May 17, 3:39 PM MDT	Special Weather Statement	RIW	51 min
May 17, 4:51 PM MDT	Special Weather Statement	RIW	24 min
May 17, 5:13 PM MDT	Special Weather Statement	RIW	32 min
May 22, 3:01 PM MDT	Special Weather Statement	RIW	29 min
May 22, 3:46 PM MDT	Special Weather Statement	RIW	29 min
May 24, 6:11 PM MDT	Special Weather Statement	RIW	34 min
May 24, 6:47 PM MDT	Special Weather Statement	RIW	28 min
May 25, 3:31 PM MDT	Special Weather Statement	RIW	44 min
May 25, 4:14 PM MDT	Special Weather Statement	RIW	31 min
May 25, 4:50 PM MDT	Special Weather Statement	RIW	25 min
May 25, 5:36 PM MDT	Special Weather Statement	RIW	24 min
May 26, 2:09 PM MDT	Special Weather Statement	RIW	66 min
May 26, 2:19 PM MDT	Special Weather Statement	RIW	41 min
May 26, 2:46 PM MDT	Special Weather Statement	RIW	44 min
May 26, 2:51 PM MDT	Special Weather Statement	RIW	24 min
May 26, 3:21 PM MDT	Special Weather Statement	RIW	24 min
May 27, 1:54 PM MDT	Special Weather Statement	RIW	36 min
Jun 1, 12:27 PM MDT	Flood Watch	RIW	54 hr
Jun 5, 4:51 PM MDT	Areal Flood Advisory	RIW	6 hr
Jun 7, 1:39 PM MDT	Special Weather Statement	RIW	36 min
Jun 8, 2:07 PM MDT	Special Weather Statement	RIW	23 min
Jun 8, 2:10 PM MDT	Special Weather Statement	RIW	35 min
Jun 8, 2:32 PM MDT	Special Weather Statement	RIW	28 min
Jun 8, 2:58 PM MDT	Areal Flood Advisory	RIW	3 hr
Jun 8, 3:01 PM MDT	Special Weather Statement	RIW	29 min
Jun 12, 12:25 PM MDT	Areal Flood Advisory	RIW	3 hr
Jun 14, 1:13 PM MDT	Flood Watch	RIW	50 hr
Jun 15, 3:06 PM MDT	Special Weather Statement	RIW	24 min
Jun 15, 3:31 PM MDT	Special Weather Statement	RIW	29 min
Jun 15, 3:55 PM MDT	Areal Flood Advisory	RIW	2 hr
Jun 15, 4:05 PM MDT	Flash Flood Warning	RIW	2 hr
Jun 15, 6:13 PM MDT	Flash Flood Warning	RIW	3 hr
Jun 15, 9:11 PM MDT	Areal Flood Advisory	RIW	16 hr
Jun 20, 12:53 PM MDT	Mesoscale Discussion	SPC	97 min
Jun 20, 4:40 PM MDT	Special Weather Statement	RIW	35 min
Jun 20, 5:01 PM MDT	Severe Thunderstorm Warning	RIW	44 min
Jun 20, 5:29 PM MDT	Mesoscale Discussion	SPC	61 min
Jun 20, 5:43 PM MDT	Severe Thunderstorm Warning	RIW	47 min
Jun 20, 6:29 PM MDT	Special Weather Statement	RIW	46 min
Jun 21, 2:43 PM MDT	Severe Thunderstorm Warning	RIW	32 min
Jun 21, 9:25 PM MDT	Special Weather Statement	RIW	35 min
Jun 23, 1:12 PM MDT	Severe Thunderstorm Warning	RIW	35 min
Jun 23, 1:26 PM MDT	Severe Thunderstorm Warning	RIW	49 min
Jun 23, 1:35 PM MDT	Tornado Warning	RIW	11 min
Jun 23, 1:39 PM MDT	Tornado Warning	RIW	5 min
Jun 23, 1:47 PM MDT	Tornado Warning	RIW	28 min
Jun 23, 1:53 PM MDT	Tornado Warning	RIW	37 min
Jun 23, 2:00 PM MDT	Tornado Warning	RIW	15 min
Jun 23, 2:22 PM MDT	Tornado Watch	SPC	9 hr
Jun 23, 2:24 PM MDT	Severe Thunderstorm Warning	RIW	51 min
Jun 23, 2:31 PM MDT	Tornado Warning	RIW	29 min
Jun 23, 2:53 PM MDT	Tornado Warning	RIW	37 min
Jun 23, 3:18 PM MDT	Tornado Warning	RIW	27 min
Jun 23, 3:39 PM MDT	Tornado Warning Tornado observed	RIW	16 min
Jun 25, 11:57 PM MDT	Special Weather Statement	RIW	33 min
Jun 26, 12:38 AM MDT	Special Weather Statement	RIW	52 min
Jun 26, 1:31 AM MDT	Special Weather Statement	RIW	44 min
Jun 26, 2:11 AM MDT	Special Weather Statement	RIW	34 min
Jun 26, 2:24 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 26, 5:50 PM MDT	Severe Thunderstorm Warning	RIW	25 min
Jun 26, 6:07 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 26, 6:12 PM MDT	Special Weather Statement	RIW	33 min
Jun 26, 6:44 PM MDT	Special Weather Statement	RIW	31 min
Jun 26, 7:08 PM MDT	Severe Thunderstorm Warning	RIW	37 min
Jun 26, 7:48 PM MDT	Special Weather Statement	RIW	27 min
Jun 27, 2:43 PM MDT	Special Weather Statement	RIW	32 min
Jun 27, 3:37 PM MDT	Special Weather Statement	RIW	23 min
Jun 27, 3:56 PM MDT	Special Weather Statement	RIW	34 min
Jun 27, 4:11 PM MDT	Special Weather Statement	RIW	34 min
Jun 27, 4:27 PM MDT	Special Weather Statement	RIW	18 min
Jun 29, 1:03 PM MDT	Severe Thunderstorm Warning	RIW	42 min
Jun 29, 1:42 PM MDT	Severe Thunderstorm Warning	RIW	48 min
Jun 29, 1:46 PM MDT	Special Weather Statement	RIW	44 min
Jun 29, 2:27 PM MDT	Special Weather Statement	RIW	33 min
Jun 29, 2:52 PM MDT	Areal Flood Advisory	RIW	6 hr
Jun 29, 3:41 PM MDT	Special Weather Statement	RIW	34 min
Jun 29, 3:42 PM MDT	Special Weather Statement	RIW	33 min
Jun 29, 3:44 PM MDT	Special Weather Statement	RIW	31 min
Jun 29, 3:47 PM MDT	Severe Thunderstorm Warning	RIW	28 min
Jun 29, 4:07 PM MDT	Severe Thunderstorm Warning	RIW	23 min
Jun 29, 4:13 PM MDT	Special Weather Statement	RIW	17 min
Jun 29, 4:19 PM MDT	Special Weather Statement	RIW	26 min
Jun 29, 4:37 PM MDT	Areal Flood Advisory	RIW	4 hr
Jun 29, 5:13 PM MDT	Special Weather Statement	RIW	17 min
Jun 29, 6:58 PM MDT	Areal Flood Advisory	RIW	5 hr
Jun 30, 3:10 PM MDT	Special Weather Statement	RIW	20 min
Jul 3, 3:03 PM MDT	Severe Thunderstorm Watch	SPC	11 hr
Jul 3, 5:08 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 3, 5:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	46 min
Jul 3, 6:00 PM MDT	Severe Thunderstorm Warning	RIW	60 min
Jul 3, 6:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	32 min
Jul 6, 2:20 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 2:53 PM MDT	Special Weather Statement	RIW	37 min
Jul 6, 4:19 PM MDT	Special Weather Statement	RIW	41 min
Jul 6, 7:33 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	42 min
Jul 6, 8:06 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	39 min
Jul 6, 8:42 PM MDT	Severe Thunderstorm Warning	RIW	33 min
Jul 8, 3:05 PM MDT	Severe Thunderstorm Warning	RIW	40 min
Jul 14, 8:30 PM MDT	Special Weather Statement	RIW	30 min
Jul 24, 5:42 PM MDT	Special Weather Statement	RIW	33 min
Jul 24, 7:49 PM MDT	Special Weather Statement	RIW	26 min
Jul 26, 3:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	48 min
Jul 26, 3:46 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 26, 4:00 PM MDT	Special Weather Statement	RIW	30 min
Jul 26, 4:13 PM MDT	Special Weather Statement	RIW	47 min
Jul 26, 4:41 PM MDT	Severe Thunderstorm Warning	RIW	34 min
Jul 26, 4:45 PM MDT	Special Weather Statement	RIW	30 min
Jul 26, 5:17 PM MDT	Special Weather Statement	RIW	28 min
Jul 28, 5:34 PM MDT	Special Weather Statement	RIW	26 min
Jul 28, 7:03 PM MDT	Special Weather Statement	RIW	27 min
Jul 29, 6:54 PM MDT	Special Weather Statement	RIW	36 min
Jul 29, 9:14 PM MDT	Severe Thunderstorm Warning	RIW	31 min
Jul 30, 6:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	29 min
Jul 30, 6:43 PM MDT	Severe Thunderstorm Warning	RIW	32 min
Aug 2, 1:53 PM MDT	Flood Watch	RIW	3 days
Aug 3, 6:21 PM MDT	Areal Flood Advisory	RIW	3 hr
Aug 6, 8:34 PM MDT	Severe Thunderstorm Warning	RIW	56 min
Aug 7, 3:02 PM MDT	Special Weather Statement	RIW	43 min
Aug 8, 5:20 PM MDT	Special Weather Statement	RIW	40 min
Aug 8, 5:59 PM MDT	Special Weather Statement	RIW	31 min
Aug 19, 1:22 PM MDT	Fire Weather Watch	RIW	24 hr
Aug 20, 1:36 PM MDT	Red Flag Warning	RIW	30 hr
Aug 27, 2:26 PM MDT	Areal Flood Advisory	RIW	3 hr
Aug 27, 2:38 PM MDT	Special Weather Statement	RIW	22 min
Aug 27, 3:00 PM MDT	Special Weather Statement	RIW	30 min
Aug 27, 3:26 PM MDT	Special Weather Statement	RIW	34 min
Aug 27, 3:28 PM MDT	Special Weather Statement	RIW	47 min
Aug 27, 3:37 PM MDT	Areal Flood Advisory	RIW	3 hr
Aug 27, 4:01 PM MDT	Severe Thunderstorm Warning Considerable damage threat	RIW	26 min
Aug 28, 3:11 PM MDT	Fire Weather Watch	RIW	23 hr
Aug 29, 2:16 PM MDT	Red Flag Warning	RIW	54 hr
Sep 1, 7:16 PM MDT	Special Weather Statement	RIW	44 min
Sep 4, 8:34 PM MDT	Flash Flood Warning	RIW	2 hr
Sep 9, 6:08 PM MDT	Special Weather Statement	RIW	37 min
Sep 9, 6:23 PM MDT	Severe Thunderstorm Warning	RIW	37 min
Sep 9, 7:00 PM MDT	Special Weather Statement	RIW	30 min
Sep 9, 7:13 PM MDT	Special Weather Statement	RIW	47 min
Sep 10, 1:35 PM MDT	Severe Thunderstorm Warning	RIW	25 min
Sep 10, 1:59 PM MDT	Severe Thunderstorm Warning	RIW	46 min
Sep 10, 2:06 PM MDT	Mesoscale Discussion	SPC	114 min
Sep 10, 2:27 PM MDT	Special Weather Statement	RIW	33 min
Sep 10, 2:41 PM MDT	Severe Thunderstorm Warning	RIW	49 min
Sep 10, 2:44 PM MDT	Severe Thunderstorm Warning	RIW	46 min
Sep 10, 3:18 PM MDT	Severe Thunderstorm Warning	RIW	42 min
Sep 10, 3:23 PM MDT	Severe Thunderstorm Warning	RIW	37 min
Sep 10, 4:00 PM MDT	Severe Thunderstorm Warning	RIW	29 min
Sep 10, 4:28 PM MDT	Special Weather Statement	RIW	32 min
Sep 10, 5:04 PM MDT	Severe Thunderstorm Warning	RIW	14 min
Sep 20, 4:24 PM MDT	Special Weather Statement	RIW	51 min
Sep 20, 7:05 PM MDT	Special Weather Statement	RIW	40 min
Sep 20, 7:30 PM MDT	Special Weather Statement	RIW	30 min
Sep 22, 11:21 AM MDT	Special Weather Statement	RIW	39 min
Sep 26, 2:31 AM MDT	Fire Weather Watch	RIW	12 hr
Sep 26, 2:27 PM MDT	Red Flag Warning	RIW	29 hr
Sep 29, 2:29 AM MDT	Fire Weather Watch	RIW	11 hr
Sep 29, 1:54 PM MDT	Red Flag Warning	RIW	29 hr
Oct 5, 1:05 AM MDT	Freeze Watch	RIW	12 hr
Oct 5, 12:48 PM MDT	Frost Advisory	RIW	20 hr
Oct 5, 1:34 PM MDT	Freeze Watch	RIW	24 hr
Oct 6, 1:18 PM MDT	Freeze Warning	RIW	20 hr
Oct 10, 1:55 AM MDT	Winter Storm Watch	RIW	24 hr
Oct 10, 3:48 PM MDT	Winter Weather Advisory	RIW	55 hr
Oct 10, 7:44 PM MDT	Special Weather Statement	RIW	31 min
Oct 11, 1:51 AM MDT	Winter Storm Warning	RIW	47 hr
Oct 24, 2:31 PM MDT	Winter Weather Advisory	RIW	55 hr
Nov 13, 1:33 PM MST	Red Flag Warning	RIW	9 hr
Nov 21, 1:16 AM MST	Winter Storm Watch	RIW	37 hr
Nov 22, 2:09 PM MST	Winter Storm Warning	RIW	51 hr
Dec 9, 2:19 AM MST	High Wind Watch	RIW	12 hr
Dec 22, 1:13 PM MST	Winter Weather Advisory	RIW	41 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	36
Tornado Warning	9
Severe Thunderstorm Watch	3
Tornado Watch	1
Mesoscale Discussion	10
Special Weather Statement	90
Flooding
Flash Flood Warning	3
Flood Watch	4
Areal Flood Advisory	13
Winter
Blizzard Warning	2
Snow Squall Warning	4
Winter Storm Warning	7
Winter Storm Watch	7
Winter Weather Advisory	15
Cold
Freeze Warning	1
Wind Chill Warning	1
Freeze Watch	2
Frost Advisory	1
Wind Chill Advisory	3
Wind and dust
High Wind Warning	6
High Wind Watch	7
Fire
Red Flag Warning	5
Fire Weather Watch	4
Fog and smoke
Dense 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 2022 2024

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.