Alert archive / Wyoming / Fremont County
Weather alerts in Fremont County, Wyoming, 2019
220 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 220
- Warnings
- 58
- Watches
- 32
- Advisories
- 48
- Busiest month
- July47 alerts
- Busiest day
- July 4, 201912 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 2 tornado warnings covering Fremont County in 2019 had a tornado report inside them.
Fremont County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 15 | 4 | 73% | 5 | 100% | 17 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Riverton, WY: tornado warnings | 14 | 0 | 100% | 2 | 0% | |
| NWS Riverton, WY: severe thunderstorm warnings | 102 | 18 | 82% | 41 | 59% | 17 min |
| NWS Riverton, WY: flash flood warnings | 1 | 0 | 100% | 1 | 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, 1:16 AM MST | Winter Weather Advisory | RIW | 62 hr |
| Jan 5, 2:04 PM MST | High Wind Watch | RIW | 34 hr |
| Jan 5, 2:18 PM MST | Winter Storm Watch | RIW | 24 hr |
| Jan 6, 5:18 AM MST | High Wind Warning | RIW | 37 hr |
| Jan 6, 2:32 PM MST | Winter Weather Advisory | RIW | 25 hr |
| Jan 11, 5:45 PM MST | Dense Fog Advisory | RIW | 18 hr |
| Jan 12, 2:04 PM MST | Dense Fog Advisory | RIW | 21 hr |
| Jan 16, 10:46 AM MST | Winter Storm Warning | RIW | 48 hr |
| Jan 16, 10:46 AM MST | Winter Weather Advisory | RIW | 48 hr |
| Jan 19, 4:51 PM MST | Winter Storm Watch | RIW | 23 hr |
| Jan 19, 4:51 PM MST | Winter Weather Advisory | RIW | 13 hr |
| Jan 20, 3:36 PM MST | Winter Storm Warning | RIW | 37 hr |
| Jan 20, 3:36 PM MST | Winter Weather Advisory | RIW | 37 hr |
| Jan 22, 2:45 PM MST | Winter Weather Advisory | RIW | 32 hr |
| Jan 26, 2:38 AM MST | Winter Storm Watch | RIW | 19 hr |
| Jan 26, 9:52 PM MST | Winter Weather Advisory | RIW | 40 hr |
| Feb 1, 2:48 AM MST | High Wind Watch | RIW | 19 hr |
| Feb 1, 1:50 PM MST | Winter Weather Advisory | RIW | 46 hr |
| Feb 1, 10:05 PM MST | High Wind Warning | RIW | 22 hr |
| Feb 3, 1:15 PM MST | Winter Weather Advisory | RIW | 3 days |
| Feb 9, 2:41 PM MST | Winter Weather Advisory | RIW | 32 hr |
| Feb 9, 7:06 PM MST | Wind Chill Advisory | RIW | 10 hr |
| Feb 11, 1:37 AM MST | Winter Weather Advisory | RIW | 28 hr |
| Feb 12, 1:25 AM MST | High Wind Watch | RIW | 9 hr |
| Feb 12, 1:25 AM MST | High Wind Warning | RIW | 49 hr |
| Feb 12, 1:50 AM MST | Winter Storm Watch | RIW | 9 hr |
| Feb 12, 10:47 AM MST | Winter Storm Warning | RIW | 4 days |
| Feb 12, 10:47 AM MST | Winter Weather Advisory | RIW | 4 days |
| Feb 22, 11:16 AM MST | Winter Storm Watch | RIW | 13 hr |
| Feb 23, 12:31 AM MST | Winter Storm Warning | RIW | 5 days |
| Feb 25, 2:19 AM MST | High Wind Watch | RIW | 7 hr |
| Feb 25, 8:55 AM MST | High Wind Warning | RIW | 23 hr |
| Feb 28, 3:12 AM MST | Winter Weather Advisory | RIW | 18 hr |
| Mar 6, 1:04 AM MST | Winter Weather Advisory | RIW | 33 hr |
| Mar 7, 3:13 PM MST | Winter Storm Watch | RIW | 10 hr |
| Mar 8, 1:42 AM MST | Winter Weather Advisory | RIW | 33 hr |
| Mar 11, 4:04 PM MDT | Winter Storm Watch | RIW | 18 hr |
| Mar 12, 9:53 AM MDT | Winter Storm Warning | RIW | 43 hr |
| Mar 12, 9:53 AM MDT | Winter Weather Advisory | RIW | 37 hr |
| Mar 27, 3:04 PM MDT | Winter Storm Watch | RIW | 23 hr |
| Mar 28, 1:58 PM MDT | Winter Storm Warning | RIW | 31 hr |
| Mar 28, 1:58 PM MDT | Winter Weather Advisory | RIW | 31 hr |
| Apr 7, 9:18 PM MDT | Winter Storm Watch | RIW | 38 hr |
| Apr 8, 2:13 PM MDT | Winter Weather Advisory | RIW | 58 hr |
| Apr 9, 11:18 AM MDT | Winter Storm Warning | RIW | 37 hr |
| Apr 11, 3:46 PM MDT | Snow Squall Warning | RIW | 59 min |
| Apr 13, 3:24 PM MDT | Winter Weather Advisory | RIW | 3 hr |
| Apr 13, 6:16 PM MDT | Winter Weather Advisory | RIW | 18 hr |
| Apr 14, 3:16 PM MDT | Winter Weather Advisory | RIW | 18 hr |
| Apr 26, 1:02 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 29, 2:48 AM MDT | Winter Weather Advisory | RIW | 57 hr |
| May 7, 2:12 PM MDT | Winter Weather Advisory | RIW | 40 hr |
| May 7, 3:55 PM MDT | Tornado Warning | RIW | 20 min |
| May 14, 3:04 PM MDT | Special Weather Statement | RIW | 26 min |
| May 16, 5:44 PM MDT | Special Weather Statement | RIW | 31 min |
| May 16, 6:23 PM MDT | Special Weather Statement | RIW | 22 min |
| May 19, 1:20 AM MDT | Winter Weather Advisory | RIW | 32 hr |
| May 20, 2:28 PM MDT | Winter Weather Advisory | RIW | 43 hr |
| May 22, 2:51 PM MDT | Winter Weather Advisory | RIW | 27 hr |
| May 27, 3:57 AM MDT | Winter Storm Warning | RIW | 33 hr |
| May 27, 7:04 PM MDT | Areal Flood Warning | RIW | 6 hr |
| Jun 2, 1:06 PM MDT | Special Weather Statement | RIW | 24 min |
| Jun 2, 1:30 PM MDT | Special Weather Statement | RIW | 45 min |
| Jun 6, 8:35 PM MDT | Special Weather Statement | RIW | 40 min |
| Jun 6, 9:17 PM MDT | Special Weather Statement | RIW | 43 min |
| Jun 6, 9:53 PM MDT | Special Weather Statement | RIW | 52 min |
| Jun 7, 9:38 AM MDT | Areal Flood Advisory | RIW | 24 hr |
| Jun 7, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 6:09 PM MDT | Areal Flood Advisory | RIW | 15 hr |
| Jun 7, 9:03 PM MDT | Areal Flood Warning | RIW | 11 hr |
| Jun 8, 9:24 AM MDT | Areal Flood Warning | RIW | 35 hr |
| Jun 8, 10:27 AM MDT | Areal Flood Advisory | RIW | 24 hr |
| Jun 9, 1:57 PM MDT | Freeze Warning | RIW | 19 hr |
| Jun 13, 1:28 PM MDT | Special Weather Statement | RIW | 17 min |
| Jun 14, 9:28 AM MDT | Areal Flood Advisory | RIW | 5 days |
| Jun 14, 1:42 PM MDT | Special Weather Statement | RIW | 48 min |
| Jun 14, 4:17 PM MDT | Special Weather Statement | RIW | 28 min |
| Jun 15, 2:48 PM MDT | Special Weather Statement | RIW | 27 min |
| Jun 15, 3:16 PM MDT | Severe Thunderstorm Warning | RIW | 44 min |
| Jun 15, 3:18 PM MDT | Special Weather Statement | RIW | 42 min |
| Jun 15, 4:02 PM MDT | Special Weather Statement | RIW | 43 min |
| Jun 15, 4:03 PM MDT | Special Weather Statement | RIW | 27 min |
| Jun 15, 4:35 PM MDT | Special Weather Statement | RIW | 25 min |
| Jun 15, 4:43 PM MDT | Special Weather Statement | RIW | 32 min |
| Jun 16, 2:45 PM MDT | Special Weather Statement | RIW | 30 min |
| Jun 16, 3:20 PM MDT | Special Weather Statement | RIW | 25 min |
| Jun 16, 4:11 PM MDT | Special Weather Statement | RIW | 34 min |
| Jun 16, 4:46 PM MDT | Special Weather Statement | RIW | 44 min |
| Jun 18, 5:32 PM MDT | Special Weather Statement | RIW | 28 min |
| Jun 18, 5:59 PM MDT | Special Weather Statement | RIW | 46 min |
| Jun 20, 1:14 PM MDT | Freeze Warning | RIW | 19 hr |
| Jun 21, 11:56 AM MDT | Freeze Warning | RIW | 20 hr |
| Jul 1, 12:33 PM MDT | Special Weather Statement | RIW | 27 min |
| Jul 1, 1:06 PM MDT | Severe Thunderstorm Warning | RIW | 39 min |
| Jul 1, 1:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 1, 1:42 PM MDT | Severe Thunderstorm Warning | RIW | 16 min |
| Jul 1, 2:03 PM MDT | Special Weather Statement | RIW | 27 min |
| Jul 1, 2:11 PM MDT | Severe Thunderstorm Warning | RIW | 19 min |
| Jul 1, 2:32 PM MDT | Severe Thunderstorm Warning | RIW | 43 min |
| Jul 1, 3:08 PM MDT | Severe Thunderstorm Warning | RIW | 52 min |
| Jul 1, 3:48 PM MDT | Severe Thunderstorm Warning | RIW | 42 min |
| Jul 2, 12:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 12:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 2:46 AM MDT | Special Weather Statement | RIW | 29 min |
| Jul 4, 2:59 AM MDT | Special Weather Statement | RIW | 31 min |
| Jul 4, 3:37 AM MDT | Severe Thunderstorm Warning | RIW | 38 min |
| Jul 4, 1:41 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 4, 1:56 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 2:26 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 4, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 4, 3:20 PM MDT | Special Weather Statement | RIW | 25 min |
| Jul 4, 3:47 PM MDT | Severe Thunderstorm Warning | RIW | 43 min |
| Jul 4, 4:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Jul 4, 4:46 PM MDT | Special Weather Statement | RIW | 29 min |
| Jul 4, 4:55 PM MDT | Severe Thunderstorm Warning | RIW | 50 min |
| Jul 4, 7:52 PM MDT | Special Weather Statement | RIW | 38 min |
| Jul 6, 1:18 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 2:56 PM MDT | Special Weather Statement | RIW | 49 min |
| Jul 8, 6:27 PM MDT | Special Weather Statement | RIW | 48 min |
| Jul 8, 6:48 PM MDT | Special Weather Statement | RIW | 27 min |
| Jul 8, 7:21 PM MDT | Special Weather Statement | RIW | 24 min |
| Jul 9, 9:25 AM MDT | Special Weather Statement | RIW | 50 min |
| Jul 11, 6:24 PM MDT | Special Weather Statement | RIW | 21 min |
| Jul 12, 2:38 PM MDT | Special Weather Statement | RIW | 22 min |
| Jul 12, 2:47 PM MDT | Severe Thunderstorm Warning | RIW | 21 min |
| Jul 12, 3:11 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 13, 2:23 PM MDT | Special Weather Statement | RIW | 37 min |
| Jul 14, 4:03 PM MDT | Special Weather Statement | RIW | 27 min |
| Jul 14, 4:17 PM MDT | Special Weather Statement | RIW | 28 min |
| Jul 14, 4:47 PM MDT | Special Weather Statement | RIW | 28 min |
| Jul 15, 1:35 PM MDT | Special Weather Statement | RIW | 40 min |
| Jul 15, 1:36 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 2:03 PM MDT | Severe Thunderstorm Warning | RIW | 42 min |
| Jul 15, 3:27 PM MDT | Special Weather Statement | RIW | 48 min |
| Jul 18, 2:38 AM MDT | Red Flag Warning | RIW | 17 hr |
| Jul 20, 5:06 PM MDT | Special Weather Statement | RIW | 39 min |
| Jul 22, 2:35 PM MDT | Special Weather Statement | RIW | 40 min |
| Jul 22, 4:31 PM MDT | Special Weather Statement | RIW | 44 min |
| Jul 31, 3:35 PM MDT | Special Weather Statement | RIW | 25 min |
| Aug 1, 3:32 PM MDT | Special Weather Statement | RIW | 28 min |
| Aug 1, 3:56 PM MDT | Special Weather Statement | RIW | 49 min |
| Aug 1, 4:55 PM MDT | Special Weather Statement | RIW | 35 min |
| Aug 4, 1:18 PM MDT | Special Weather Statement | RIW | 42 min |
| Aug 4, 8:28 PM MDT | Special Weather Statement | RIW | 32 min |
| Aug 4, 9:03 PM MDT | Special Weather Statement | RIW | 27 min |
| Aug 5, 2:59 PM MDT | Special Weather Statement | RIW | 31 min |
| Aug 5, 3:31 PM MDT | Special Weather Statement | RIW | 29 min |
| Aug 9, 4:47 PM MDT | Fire Weather Watch | RIW | 22 hr |
| Aug 10, 2:51 PM MDT | Red Flag Warning | RIW | 52 hr |
| Aug 10, 3:48 PM MDT | Special Weather Statement | RIW | 27 min |
| Aug 14, 4:22 AM MDT | Red Flag Warning | RIW | 16 hr |
| Aug 15, 8:32 PM MDT | Red Flag Warning | RIW | 4 days |
| Aug 16, 3:58 AM MDT | Fire Weather Watch | RIW | 49 hr |
| Aug 21, 2:42 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Aug 21, 2:52 PM MDT | Red Flag Warning | RIW | 45 hr |
| Aug 21, 3:55 PM MDT | Severe Thunderstorm Warning | RIW | 35 min |
| Aug 23, 3:19 PM MDT | Fire Weather Watch | RIW | 23 hr |
| Aug 23, 3:35 PM MDT | Severe Thunderstorm Warning | RIW | 25 min |
| Aug 23, 5:59 PM MDT | Special Weather Statement | RIW | 31 min |
| Aug 23, 6:28 PM MDT | Special Weather Statement | RIW | 32 min |
| Aug 23, 7:04 PM MDT | Special Weather Statement | RIW | 26 min |
| Aug 23, 7:14 PM MDT | Special Weather Statement | RIW | 31 min |
| Aug 24, 2:10 PM MDT | Red Flag Warning | RIW | 54 hr |
| Aug 27, 1:27 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Aug 27, 1:33 PM MDT | Red Flag Warning | RIW | 53 hr |
| Aug 30, 1:47 PM MDT | Special Weather Statement | RIW | 43 min |
| Aug 30, 2:11 PM MDT | Tornado Warning | RIW | 12 min |
| Aug 31, 2:27 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Aug 31, 2:48 PM MDT | Red Flag Warning | RIW | 53 hr |
| Sep 3, 3:12 AM MDT | Fire Weather Watch | RIW | 11 hr |
| Sep 3, 2:26 PM MDT | Red Flag Warning | RIW | 29 hr |
| Sep 8, 2:40 PM MDT | Special Weather Statement | RIW | 50 min |
| Sep 12, 4:22 AM MDT | Freeze Watch | RIW | 10 hr |
| Sep 12, 2:18 PM MDT | Freeze Warning | RIW | 18 hr |
| Sep 17, 12:21 AM MDT | Special Weather Statement | RIW | 39 min |
| Sep 17, 10:18 AM MDT | Special Weather Statement | RIW | 42 min |
| Sep 17, 10:53 AM MDT | Special Weather Statement | RIW | 37 min |
| Sep 19, 1:50 PM MDT | Winter Weather Advisory | RIW | 44 hr |
| Sep 20, 1:42 PM MDT | Special Weather Statement | RIW | 33 min |
| Sep 21, 5:36 AM MDT | Freeze Watch | RIW | 9 hr |
| Sep 25, 2:39 AM MDT | Fire Weather Watch | RIW | 25 hr |
| Sep 25, 2:29 PM MDT | Red Flag Warning | RIW | 30 hr |
| Sep 27, 4:02 AM MDT | Winter Storm Watch | RIW | 10 hr |
| Sep 27, 2:06 PM MDT | Winter Weather Advisory | RIW | 52 hr |
| Sep 28, 1:11 PM MDT | Severe Thunderstorm Warning | RIW | 49 min |
| Sep 28, 1:55 PM MDT | Special Weather Statement | RIW | 50 min |
| Sep 29, 1:37 PM MDT | Freeze Warning | RIW | 20 hr |
| Oct 1, 2:39 PM MDT | Freeze Watch | RIW | 24 hr |
| Oct 2, 2:27 PM MDT | Freeze Warning | RIW | 20 hr |
| Oct 6, 3:02 PM MDT | Winter Storm Watch | RIW | 43 hr |
| Oct 8, 10:24 AM MDT | Winter Storm Warning | RIW | 41 hr |
| Oct 8, 10:24 AM MDT | Winter Weather Advisory | RIW | 35 hr |
| Oct 18, 2:46 AM MDT | Winter Storm Watch | RIW | 12 hr |
| Oct 18, 2:42 PM MDT | Winter Storm Warning | RIW | 40 hr |
| Oct 18, 2:42 PM MDT | Winter Weather Advisory | RIW | 51 hr |
| Oct 25, 12:44 PM MDT | Winter Weather Advisory | RIW | 49 hr |
| Oct 26, 9:30 PM MDT | Winter Storm Warning | RIW | 12 hr |
| Oct 27, 2:45 PM MDT | Winter Weather Advisory | RIW | 51 hr |
| Nov 16, 12:00 PM MST | Special Weather Statement | RIW | 60 min |
| Nov 16, 1:00 PM MST | Special Weather Statement | RIW | 60 min |
| Nov 19, 4:54 AM MST | Winter Storm Watch | RIW | 7 hr |
| Nov 19, 4:54 AM MST | Winter Weather Advisory | RIW | 46 hr |
| Nov 19, 12:17 PM MST | Winter Storm Warning | RIW | 39 hr |
| Nov 23, 6:24 AM MST | Dense Fog Advisory | RIW | 6 hr |
| Nov 25, 4:09 AM MST | Winter Storm Warning | RIW | 32 hr |
| Nov 25, 4:09 AM MST | Winter Weather Advisory | RIW | 32 hr |
| Nov 27, 3:53 AM MST | Winter Storm Watch | RIW | 37 hr |
| Nov 28, 4:39 PM MST | Winter Storm Warning | RIW | 49 hr |
| Nov 28, 4:39 PM MST | Winter Weather Advisory | RIW | 43 hr |
| Nov 28, 7:44 PM MST | Special Weather Statement | RIW | 46 min |
| Dec 1, 4:29 AM MST | Winter Weather Advisory | RIW | 35 hr |
| Dec 1, 2:33 PM MST | Winter Weather Advisory | RIW | 29 hr |
| Dec 6, 12:39 PM MST | Winter Storm Watch | RIW | 14 hr |
| Dec 7, 2:23 AM MST | Winter Storm Warning | RIW | 43 hr |
| Dec 7, 2:23 AM MST | Winter Weather Advisory | RIW | 43 hr |
| Dec 10, 1:32 PM MST | Winter Storm Watch | RIW | 25 hr |
| Dec 11, 2:30 PM MST | Winter Storm Warning | RIW | 45 hr |
| Dec 11, 2:30 PM MST | Winter Weather Advisory | RIW | 45 hr |
| Dec 13, 2:45 PM MST | Winter Weather Advisory | RIW | 26 hr |
| Dec 31, 9:18 AM MST | High Wind Warning | RIW | 9 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 | 15 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 74 |
| Flooding | |
| Areal Flood Warning | 3 |
| Areal Flood Advisory | 4 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 16 |
| Winter Storm Watch | 16 |
| Winter Weather Advisory | 40 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 4 |
| Fire | |
| Red Flag Warning | 10 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.