Alert archive / Wyoming / High Wind Warnings in 2021
High Wind Warning 26, NWS Riverton, WY
NWS Riverton, WY issued this high wind warning at Dec 29, 2021, 2:00 PM MST for 4 counties in Wyoming. It took effect at Dec 29, 2021, 10:00 PM MST. It was in force for 21 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 29, 2021, 2:00 PM MST (21:00 UTC)
- In effect from
- Dec 29, 2021, 10:00 PM MST
- Expired
- Dec 30, 2021, 7:00 PM MST
- In force
- 21 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Natrona County, WY, Sublette County, WY, Sweetwater County, WY
The radar
The Riverton/Lander radar (KRIW), 51 km from the middle of the area, began a volume at 20:59 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.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.0 hours before the alert went out and 53 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
- 1660 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
985 WWUS75 KRIW 292100 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 200 PM MST Wed Dec 29 2021 WYZ020-301300- /O.UPG.KRIW.HW.A.0020.211230T0500Z-211231T0200Z/ /O.NEW.KRIW.HW.W.0026.211230T0500Z-211231T0200Z/ Natrona County Lower Elevations- Including the city of Casper 200 PM MST Wed Dec 29 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 7 PM MST THURSDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 55 to 60 mph expected. * WHERE...Natrona County Lower Elevations. * WHEN...From 10 PM Wednesday evening to 7 PM MST Thursday. * IMPACTS...Mainly to transportation. Enhanced blow over risk for light and high profile vehicles especially along WY Highway 258 (Wyoming Boulevard, Outer Drive) on the south side of Casper. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ WYZ015-301300- /O.NEW.KRIW.HW.W.0026.211230T0500Z-211231T0200Z/ Wind River Mountains East- 200 PM MST Wed Dec 29 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 7 PM MST THURSDAY... * WHAT...West winds 35 to 45 mph with gusts up to 70 to 75 mph expected. * WHERE...Wind River Mountains East, particularly Red Canyon to near South Pass. * WHEN...From 10 PM Wednesday evening to 7 PM MST Thursday. * IMPACTS...Mainly to transportation. Enhanced blow over risk for light and high profile vehicles especially for Highway 28 across Red Canyon and South Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
3 follow-up statements
587 WWUS75 KRIW 300506 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 1006 PM MST Wed Dec 29 2021 WYZ020-301400- /O.CON.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Natrona County Lower Elevations- Including the city of Casper 1006 PM MST Wed Dec 29 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THURSDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 65 mph. * WHERE...Natrona County Lower Elevations. * WHEN...Until 7 PM MST Thursday. * IMPACTS...Mainly to transportation. Enhanced blow over risk for light and high profile vehicles especially along WY Highway 258 (Wyoming Boulevard, Outer Drive) on the south side of Casper. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WYZ015-301400- /O.CON.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Wind River Mountains East- 1006 PM MST Wed Dec 29 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THURSDAY... * WHAT...West winds 35 to 45 mph with gusts up to 80 mph. * WHERE...Wind River Mountains East, particularly Red Canyon to near South Pass. * WHEN...Until 7 PM MST Thursday. * IMPACTS...Mainly to transportation. Enhanced blow over risk for light and high profile vehicles especially for Highway 28 across Red Canyon and South Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
555 WWUS75 KRIW 300950 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 250 AM MST Thu Dec 30 2021 WYZ020-310000- /O.CON.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Natrona County Lower Elevations- Including the city of Casper 250 AM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...Southwest winds 25 to 35 mph with gusts up to 65 mph. * WHERE...Natrona County Lower Elevations. * WHEN...Until 7 PM MST today. * IMPACTS...Mainly to transportation. Enhanced blow over risk for light and high profile vehicles especially along WY Highway 258 (Wyoming Boulevard, Outer Drive) on the south side of Casper. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ WYZ015-310000- /O.CON.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Wind River Mountains East- 250 AM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...West winds 35 to 45 mph with gusts up to 80 mph. * WHERE...Wind River Mountains East, particularly Red Canyon to near South Pass. * WHEN...Until 7 PM MST today. * IMPACTS...Mainly to transportation. Enhanced blow over risk for light and high profile vehicles especially for Highway 28 across Red Canyon and South Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. Use caution if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
365 WWUS75 KRIW 302012 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 112 PM MST Thu Dec 30 2021 WYZ019-310200- /O.EXA.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 112 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...Southwest wind 30 to 40 mph with gusts around 60 mph. Gusts around 75 mph in the higher terrain. Gusts 40 to 50 mph between Beaver Rim and Jeffrey City. * WHERE...Green Mountains and Rattlesnake Range. * WHEN...Until 7 PM MST today. * IMPACTS...Mainly to transportation. Enhanced blowover risk for lightweight and high-profile vehicles, especially along Wyoming Highway 220 from Devil's Gate to Pathfinder Reservoir. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive, especially on US 287 where the southwest wind will be more of a crosswind. && $$ WYZ020-310200- /O.CON.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Natrona County Lower Elevations- Including the city of Casper 112 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...Southwest wind 30 to 40 mph with gusts 60 to 70 mph. * WHERE...Natrona County Lower Elevations. * WHEN...Until 7 PM MST today. * IMPACTS...Mainly to transportation. Enhanced blowover risk for lightweight and high-profile vehicles especially along Wyoming Highway 258 (Wyoming Boulevard, Outer Drive) on the south side of Casper and near Hat Six just east of Casper. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside around trees as branches may be broken loose. Use caution if you must drive. && $$ WYZ015-310200- /O.CON.KRIW.HW.W.0026.000000T0000Z-211231T0200Z/ Wind River Mountains East- 112 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...West winds 35 to 45 mph with gusts 65 to 75 mph. * WHERE...Wind River Mountains East, particularly Red Canyon to near South Pass. * WHEN...Until 7 PM MST today. * IMPACTS...Mainly to transportation. Enhanced blowover risk for lightweight and high-profile vehicles especially for Wyoming Highway 28 around Red Canyon and South Pass. 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
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 29, 1:46 AM MST | Winter Weather Advisory | RIW | Fremont, Lincoln, Park, Sublette, Teton | 50 hr |
| Dec 29, 1:49 AM MST | High Wind Watch | RIW | Natrona | 12 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.