Alert archive / Wyoming / High Wind Warnings in 2021
High Wind Warning 25, NWS Riverton, WY
NWS Riverton, WY issued this high wind warning at Dec 25, 2021, 1:52 PM MST for 5 counties in Wyoming. It took effect at Dec 26, 2021, 9:00 AM MST. It was in force for 10 hr. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 25, 2021, 1:52 PM MST (20:52 UTC)
- In effect from
- Dec 26, 2021, 9:00 AM MST
- Expired
- Dec 26, 2021, 7:00 PM MST
- In force
- 10 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Johnson County, WY, Natrona County, WY, Park County, WY, Sweetwater County, WY
The radar
The Riverton/Lander radar (KRIW), 37 km from the middle of the area, began a volume at 20:57 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 26, 10:30 AM MST | NON-TSTM WND GST 63 | 8 Se Reliance, WY | ASOS STATION KRKS ROCK SPRINGS AIRPORT. |
| Dec 26, 10:36 AM MST | NON-TSTM WND GST 64 | Farson, WY | MESONET STATION WY42 FARSON (WYDOT). |
| Dec 26, 10:44 AM MST | NON-TSTM WND GST 59 | 16 Se Rock Springs, WY | MESONET STATION SNOW4 ROCK SPRINGS 15 SE. |
| Dec 26, 10:46 AM MST | NON-TSTM WND GST 60 | 6 Se Superior, WY | MESONET STATION WY11 SUPERIOR 6 SE (WYDOT). |
| Dec 26, 11:16 AM MST | NON-TSTM WND GST 70 | 9 W Red Desert, WY | MESONET STATION WY13 RED DESERT 9 W (WYDOT). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 8.9 hours before the alert went out and 31 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1942 m above ground
- 0-6 km bulk shear
- 98 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
134 WWUS75 KRIW 252052 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 152 PM MST Sat Dec 25 2021 WYZ019-020-261200- /O.NEW.KRIW.HW.W.0025.211226T1600Z-211227T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 152 PM MST Sat Dec 25 2021 ...HIGH WIND WARNING IN EFFECT FROM 9 AM TO 7 PM MST SUNDAY... * WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...Green Mountains and Rattlesnake Range and Natrona County Lower Elevations. * WHEN...From 9 AM to 7 PM MST Sunday. * IMPACTS...Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
3 follow-up statements
051 WWUS75 KRIW 260956 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 256 AM MST Sun Dec 26 2021 WYZ010-011-270200- /O.EXA.KRIW.HW.W.0025.211226T1600Z-211227T0200Z/ Northeast Johnson County-Southeast Johnson County- Including the cities of Buffalo and Kaycee 256 AM MST Sun Dec 26 2021 ...HIGH WIND WARNING IN EFFECT FROM 9 AM THIS MORNING TO 7 PM MST THIS EVENING... * WHAT...West and southwest winds 25 to 35 mph with gusts up to 60 mph expected. Isolated snow showers in the evening could cause reduced visibility. * WHERE...Northeast Johnson County and Southeast Johnson County. * WHEN...From 9 AM this morning to 7 PM MST this evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Visibility could be reduced due to blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ WYZ028-030-270200- /O.EXA.KRIW.HW.W.0025.211226T1600Z-211227T0200Z/ Rock Springs and Green River-East Sweetwater County- Including the cities of Rock Springs, Green River, and Wamsutter 256 AM MST Sun Dec 26 2021 ...HIGH WIND WARNING IN EFFECT FROM 9 AM THIS MORNING TO 7 PM MST THIS EVENING... * WHAT...West winds 25 to 35 mph with gusts up to 60 mph expected. Snow showers could cause reduced visibility and slick winter travel. * WHERE...Rock Springs, Green River, and East Sweetwater County. This includes much of I-80 in southern Wyoming. * WHEN...From 9 AM this morning to 7 PM MST this evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Visibility could be reduced due to blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ WYZ003-270200- /O.EXA.KRIW.HW.W.0025.211226T1600Z-211227T0200Z/ Cody Foothills- Including the cities of Clark, Cody, and Meeteetse 256 AM MST Sun Dec 26 2021 ...HIGH WIND WARNING IN EFFECT FROM 9 AM THIS MORNING TO 7 PM MST THIS EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 65 mph expected. Snow showers could cause reduced visibility and slick winter travel. * WHERE...Cody Foothills including WY Hwy 120. * WHEN...From 9 AM this morning to 7 PM MST this evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Visibility could be reduced due to blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ WYZ019-020-270200- /O.CON.KRIW.HW.W.0025.211226T1600Z-211227T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 256 AM MST Sun Dec 26 2021 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 7 PM MST THIS EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph expected. Snow showers could cause reduced visibility and slick winter travel. * WHERE...Natrona County Lower Elevations, the Green Mountains, and the Rattlesnake Range. This includes South Pass and WY Hwy 258 (Wyoming Blvd, Outer Drive) on the south side of Casper. * WHEN...From 9 AM this morning to 7 PM MST this evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Visibility could be reduced due to blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
660 WWUS75 KRIW 270016 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 516 PM MST Sun Dec 26 2021 WYZ003-010-011-270130- /O.CAN.KRIW.HW.W.0025.000000T0000Z-211227T0200Z/ Cody Foothills-Northeast Johnson County-Southeast Johnson County- Including the cities of Clark, Cody, Meeteetse, Buffalo, and Kaycee 516 PM MST Sun Dec 26 2021 ...HIGH WIND WARNING IS CANCELLED... A cold front has slipped south across the region accompanied by much colder air and gusty north wind. Therefore, the high wind warning has been cancelled. In Park County, gusty west wind 20 to 30 mph may persist south of Meeteetse Rim along Wyoming Highway 120 through mid-evening. $$ WYZ019-020-270200- /O.CON.KRIW.HW.W.0025.000000T0000Z-211227T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 516 PM MST Sun Dec 26 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...Southwest wind 30 to 40 mph with gusts up to 60 mph expected. Isolated snow showers could cause reduced visibility and slick winter travel. * WHERE...Natrona County Lower Elevations, the Green Mountains, and the Rattlesnake Range. This includes South Pass and Wyoming Highway 258 (Wyoming Boulevard) on the south side of Casper. * WHEN...Until 7 PM MST Sunday evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Visibility could be reduced due to blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution and be prepared for sudden crosswinds if you must drive. && $$ WYZ028-030-270200- /O.CON.KRIW.HW.W.0025.000000T0000Z-211227T0200Z/ Rock Springs and Green River-East Sweetwater County- Including the cities of Rock Springs, Green River, and Wamsutter 516 PM MST Sun Dec 26 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...West wind 25 to 35 mph with gusts 50 to 60 mph. Isolated snow showers could cause reduced visibility and slick winter travel. * WHERE...Rock Springs, Green River, and East Sweetwater County. This includes much of I-80 in southern Wyoming. * WHEN...Until 7 PM MST Sunday evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Visibility could be reduced due to blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution and be prepared for sudden crosswinds if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
785 WWUS75 KRIW 270158 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 658 PM MST Sun Dec 26 2021 WYZ019-020-270300- /O.EXP.KRIW.HW.W.0025.000000T0000Z-211227T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 658 PM MST Sun Dec 26 2021 ...HIGH WIND WARNING WILL EXPIRE AT 7 PM MST THIS EVENING... Wind speeds have fallen below warning thresholds and the wind is expected to continue to decrease the rest of tonight. Therefore, the high wind warning will be allowed to expire. Wind gusts around 50 mph are still possible Sunday evening along Wyoming Highway 258 (Wyoming Boulevard) near the intersection with McKinley Street on the south side of Casper. $$ WYZ028-030-270300- /O.EXP.KRIW.HW.W.0025.000000T0000Z-211227T0200Z/ Rock Springs and Green River-East Sweetwater County- Including the cities of Rock Springs, Green River, and Wamsutter 658 PM MST Sun Dec 26 2021 ...HIGH WIND WARNING WILL EXPIRE AT 7 PM MST THIS EVENING... Westerly wind 20 to 30 mph with gusts around 40 mph will continue to decrease Sunday evening. These speeds are below warning thresholds, so the high wind warning will be allowed to expire. $$ For more information from the National Weather Service visit https://weather.gov/riw
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 2:58 AM MST | Winter Weather Advisory | RIW | Fremont, Hot Springs, Lincoln, Park, Sublette, Teton | 38 hr |
Nearby
High Wind Warnings in Wyoming, 2021Every high wind warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.