Alert archive / Wyoming / Sweetwater County
Weather alerts in Sweetwater County, Wyoming, 2017
101 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sweetwater County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 101
- Warnings
- 40
- Watches
- 21
- Advisories
- 22
- Busiest month
- March17 alerts
- Busiest day
- June 7, 20175 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 reports fell inside a warning.
Sweetwater County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 4 | 0 | 100% | 1 | 0% | |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Riverton, WY: tornado warnings | 9 | 3 | 67% | 7 | 57% | 20 min |
| NWS Riverton, WY: severe thunderstorm warnings | 50 | 7 | 86% | 30 | 27% | 18 min |
| NWS Riverton, WY: flash flood warnings | 4 | 1 | 75% | 2 | 50% | 66 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, 3:04 PM MST | Winter Weather Advisory | RIW | 22 hr |
| Jan 3, 4:42 AM MST | Winter Storm Watch | RIW | 8 hr |
| Jan 3, 12:49 PM MST | Winter Storm Warning | RIW | 40 hr |
| Jan 3, 12:49 PM MST | Winter Weather Advisory | RIW | 40 hr |
| Jan 5, 1:18 PM MST | Wind Chill Warning | RIW | 21 hr |
| Jan 6, 12:41 PM MST | Winter Storm Watch | RIW | 27 hr |
| Jan 7, 2:39 AM MST | High Wind Watch | RIW | 23 hr |
| Jan 7, 3:46 PM MST | Winter Storm Warning | RIW | 4 days |
| Jan 8, 1:25 AM MST | High Wind Warning | RIW | 3 days |
| Jan 10, 10:35 AM MST | Winter Weather Advisory | RIW | 35 hr |
| Jan 14, 5:37 PM MST | Dense Fog Advisory | RIW | 42 hr |
| Jan 22, 1:24 PM MST | Winter Weather Advisory | RIW | 59 hr |
| Jan 30, 7:13 PM MST | High Wind Warning | RIW | 17 hr |
| Feb 3, 11:55 AM MST | High Wind Warning | RIW | 4 days |
| Feb 5, 10:44 AM MST | High Wind Watch | RIW | 4 hr |
| Feb 5, 2:08 PM MST | Winter Weather Advisory | RIW | 58 hr |
| Feb 6, 2:27 PM MST | High Wind Watch | RIW | 27 hr |
| Feb 7, 3:02 PM MST | High Wind Warning | RIW | 14 hr |
| Feb 8, 12:59 PM MST | High Wind Warning | RIW | 43 hr |
| Feb 8, 3:23 PM MST | Winter Weather Advisory | RIW | 47 hr |
| Feb 14, 12:55 PM MST | Areal Flood Advisory | RIW | 48 hr |
| Feb 19, 2:10 PM MST | High Wind Watch | RIW | 21 hr |
| Feb 19, 2:10 PM MST | High Wind Warning | RIW | 69 hr |
| Feb 21, 3:48 PM MST | Winter Storm Watch | RIW | 23 hr |
| Feb 22, 2:49 PM MST | Blizzard Warning | RIW | 30 hr |
| Feb 22, 2:49 PM MST | Winter Storm Warning | RIW | 44 hr |
| Feb 24, 9:01 AM MST | Areal Flood Advisory | RIW | 48 hr |
| Feb 27, 2:07 AM MST | Winter Weather Advisory | RIW | 12 hr |
| Feb 28, 1:17 PM MST | High Wind Warning | RIW | 35 hr |
| Mar 3, 3:12 PM MST | High Wind Watch | RIW | 15 hr |
| Mar 4, 5:56 AM MST | High Wind Warning | RIW | 56 hr |
| Mar 4, 2:44 PM MST | Winter Weather Advisory | RIW | 38 hr |
| Mar 7, 1:01 PM MST | High Wind Warning | RIW | 33 hr |
| Mar 11, 10:16 AM MST | Areal Flood Warning | RIW | 24 hr |
| Mar 12, 10:24 AM MDT | Areal Flood Warning | RIW | 48 hr |
| Mar 13, 10:40 AM MDT | Areal Flood Warning | RIW | 45 hr |
| Mar 15, 8:35 PM MDT | Areal Flood Advisory | RIW | 24 hr |
| Mar 16, 9:26 AM MDT | Fire Weather Watch | RIW | 170 days |
| Mar 17, 9:01 AM MDT | Flood Watch | RIW | 6 days |
| Mar 22, 12:45 AM MDT | Winter Weather Advisory | RIW | 45 hr |
| Mar 22, 2:30 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 27, 2:10 AM MDT | Winter Weather Advisory | RIW | 36 hr |
| Mar 29, 11:52 AM MDT | Winter Storm Watch | RIW | 25 hr |
| Mar 30, 12:38 PM MDT | Winter Storm Warning | RIW | 37 hr |
| Mar 30, 6:07 PM MDT | Special Weather Statement | RIW | 38 min |
| Mar 31, 1:30 AM MDT | High Wind Warning | RIW | 19 hr |
| Apr 4, 2:48 AM MDT | Winter Weather Advisory | RIW | 11 hr |
| Apr 7, 1:48 PM MDT | Winter Weather Advisory | RIW | 58 hr |
| Apr 9, 1:40 AM MDT | High Wind Warning | RIW | 10 hr |
| Apr 25, 9:25 PM MDT | Winter Weather Advisory | RIW | 3 days |
| Apr 26, 2:57 PM MDT | Winter Storm Watch | RIW | 11 hr |
| Apr 27, 1:32 AM MDT | Winter Storm Warning | RIW | 44 hr |
| May 8, 4:27 PM MDT | Special Weather Statement | RIW | 48 min |
| May 16, 10:05 PM MDT | Winter Weather Advisory | RIW | 56 hr |
| May 17, 12:23 AM MDT | Winter Storm Warning | RIW | 54 hr |
| May 26, 12:57 PM MDT | Severe Thunderstorm Warning | RIW | 13 min |
| May 26, 1:25 PM MDT | Severe Thunderstorm Warning | RIW | 20 min |
| Jun 1, 9:32 AM MDT | Flood Watch | RIW | 9 days |
| Jun 6, 5:17 PM MDT | Special Weather Statement | RIW | 28 min |
| Jun 6, 6:19 PM MDT | Special Weather Statement | RIW | 26 min |
| Jun 6, 6:41 PM MDT | Special Weather Statement | RIW | 34 min |
| Jun 6, 7:07 PM MDT | Special Weather Statement | RIW | 38 min |
| Jun 6, 7:14 PM MDT | Special Weather Statement | RIW | 31 min |
| Jun 6, 7:37 PM MDT | Special Weather Statement | RIW | 53 min |
| Jun 11, 1:08 PM MDT | High Wind Watch | RIW | 13 hr |
| Jun 12, 2:06 AM MDT | High Wind Warning | RIW | 19 hr |
| Jun 12, 10:56 PM MDT | High Wind Warning | RIW | 22 hr |
| Jun 27, 12:53 PM MDT | Special Weather Statement | RIW | 37 min |
| Jul 20, 9:31 PM MDT | Special Weather Statement | RIW | 29 min |
| Jul 21, 2:40 PM MDT | Severe Thunderstorm Warning | RIW | 35 min |
| Jul 21, 3:02 PM MDT | Severe Thunderstorm Warning | RIW | 16 min |
| Jul 24, 2:57 PM MDT | Special Weather Statement | RIW | 33 min |
| Jul 26, 2:36 PM MDT | Special Weather Statement | RIW | 24 min |
| Aug 14, 2:06 PM MDT | Special Weather Statement | RIW | 54 min |
| Aug 20, 2:13 PM MDT | Special Weather Statement | RIW | 32 min |
| Sep 2, 8:20 PM MDT | Red Flag Warning | RIW | 25 hr |
| Sep 15, 10:34 PM MDT | Freeze Watch | RIW | 16 hr |
| Sep 16, 2:33 PM MDT | Freeze Warning | RIW | 18 hr |
| Sep 22, 2:57 PM MDT | Special Weather Statement | RIW | 33 min |
| Sep 22, 3:52 PM MDT | Special Weather Statement | RIW | 23 min |
| Sep 22, 4:24 PM MDT | Special Weather Statement | RIW | 21 min |
| Oct 7, 2:30 AM MDT | High Wind Warning | RIW | 16 hr |
| Oct 20, 2:14 AM MDT | High Wind Warning | RIW | 16 hr |
| Oct 21, 2:11 PM MDT | High Wind Watch | RIW | 12 hr |
| Oct 21, 2:11 PM MDT | High Wind Warning | RIW | 36 hr |
| Oct 24, 1:44 AM MDT | Fire Weather Watch | RIW | 23 hr |
| Oct 24, 1:44 PM MDT | Red Flag Warning | RIW | 30 hr |
| Oct 30, 1:28 PM MDT | High Wind Watch | RIW | 25 hr |
| Oct 31, 8:46 AM MDT | High Wind Warning | RIW | 34 hr |
| Nov 15, 12:57 AM MST | High Wind Watch | RIW | 24 hr |
| Nov 15, 12:57 AM MST | High Wind Warning | RIW | 46 hr |
| Nov 17, 11:57 AM MST | High Wind Warning | RIW | 3 days |
| Nov 18, 9:01 PM MST | High Wind Watch | RIW | 23 hr |
| Nov 23, 3:02 AM MST | High Wind Warning | RIW | 26 hr |
| Nov 26, 12:54 PM MST | High Wind Warning | RIW | 26 hr |
| Nov 28, 12:26 PM MST | High Wind Warning | RIW | 27 hr |
| Dec 1, 12:22 PM MST | Winter Storm Watch | RIW | 33 hr |
| Dec 2, 1:39 PM MST | Winter Weather Advisory | RIW | 45 hr |
| Dec 15, 12:55 PM MST | Winter Weather Advisory | RIW | 37 hr |
| Dec 19, 8:10 PM MST | Winter Weather Advisory | RIW | 40 hr |
| Dec 21, 3:32 PM MST | Winter Weather Advisory | RIW | 51 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 |
| Mesoscale Discussion | 1 |
| Special Weather Statement | 17 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 18 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| High Wind Warning | 22 |
| High Wind Watch | 10 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.