Alert archive / Wyoming / High Wind Watches in 2021
High Wind Watch 9, NWS Riverton, WY
NWS Riverton, WY issued this high wind watch at May 22, 2021, 1:20 PM MDT for 4 counties in Wyoming. It took effect at May 23, 2021, 10:00 AM MDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- May 22, 2021, 1:20 PM MDT (19:20 UTC)
- In effect from
- May 23, 2021, 10:00 AM MDT
- Expired
- May 23, 2021, 1:55 AM MDT
- In force
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Johnson County, WY, Natrona County, WY, Sweetwater County, WY
The radar
The Riverton/Lander radar (KRIW), 63 km from the middle of the area, began a volume at 19:21 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, 7.3 hours before the alert went out and 57 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
- 540 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
246 WWUS75 KRIW 221920 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 120 PM MDT Sat May 22 2021 WYZ030-230330- /O.NEW.KRIW.HW.W.0013.210523T1200Z-210523T2000Z/ East Sweetwater County- Including the city of Wamsutter 120 PM MDT Sat May 22 2021 ...HIGH WIND WARNING IN EFFECT FROM 6 AM TO 2 PM MDT SUNDAY... * WHAT...South winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...Eastern Sweetwater County. * WHEN...From 6 AM to 2 PM MDT Sunday. * IMPACTS...Travel will be difficult, especially for high profile vehicles including along I-80. 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. && $$ WYZ019-020-230330- /O.NEW.KRIW.HW.A.0009.210523T1600Z-210524T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 120 PM MDT Sat May 22 2021 ...HIGH WIND WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...Green Mountains and Rattlesnake Range and Natrona County Lower Elevations. * WHEN...From Sunday morning through Sunday evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles including along I-25 and around the Casper area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ WYZ011-230330- /O.NEW.KRIW.HW.A.0009.210523T1800Z-210524T0200Z/ Southeast Johnson County- Including the city of Kaycee 120 PM MDT Sat May 22 2021 ...HIGH WIND WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...Southeast Johnson County. * WHEN...From Sunday afternoon through Sunday evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles including along I-25. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ For more information from the National Weather Service visit https://weather.gov/riw
2 follow-up statements
701 WWUS75 KRIW 230240 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 840 PM MDT Sat May 22 2021 WYZ030-231200- /O.CON.KRIW.HW.W.0013.210523T1200Z-210523T2000Z/ East Sweetwater County- Including the city of Wamsutter 840 PM MDT Sat May 22 2021 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 6 AM TO 2 PM MDT SUNDAY... * WHAT...South winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...Eastern Sweetwater County. * WHEN...From 6 AM to 2 PM MDT Sunday. * IMPACTS...Travel will be difficult, especially for high profile vehicles including along I-80. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WYZ019-020-231200- /O.CON.KRIW.HW.A.0009.210523T1600Z-210524T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 840 PM MDT Sat May 22 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...Green Mountains and Rattlesnake Range and Natrona County Lower Elevations. * WHEN...From Sunday morning through Sunday evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles including along I-25 and around the Casper area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ WYZ011-231200- /O.CON.KRIW.HW.A.0009.210523T1800Z-210524T0200Z/ Southeast Johnson County- Including the city of Kaycee 840 PM MDT Sat May 22 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...Southeast Johnson County. * WHEN...From Sunday afternoon through Sunday evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles including along I-25. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ For more information from the National Weather Service visit https://weather.gov/riw
438 WWUS75 KRIW 230755 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 155 AM MDT Sun May 23 2021 WYZ019-020-232200- /O.UPG.KRIW.HW.A.0009.210523T1600Z-210524T0200Z/ /O.EXB.KRIW.HW.W.0013.210523T1600Z-210524T0200Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 155 AM MDT Sun May 23 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MDT THIS EVENING... * 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 10 AM this morning to 8 PM MDT this evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles including along I-25 and around the Casper area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ WYZ011-232200- /O.UPG.KRIW.HW.A.0009.210523T1800Z-210524T0200Z/ /O.EXB.KRIW.HW.W.0013.210523T1800Z-210524T0200Z/ Southeast Johnson County- Including the city of Kaycee 155 AM MDT Sun May 23 2021 ...HIGH WIND WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING... * WHAT...Southwest winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Southeast Johnson County. * WHEN...From noon today to 8 PM MDT this evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles including along I-25. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ WYZ030-232000- /O.CON.KRIW.HW.W.0013.210523T1200Z-210523T2000Z/ East Sweetwater County- Including the city of Wamsutter 155 AM MDT Sun May 23 2021 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING TO 2 PM MDT THIS AFTERNOON... * WHAT...South winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...Eastern Sweetwater County. * WHEN...From 6 AM to 2 PM MDT Sunday. * IMPACTS...Travel will be difficult, especially for high profile vehicles including along I-80. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ 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 |
|---|---|---|---|---|
| May 22, 1:20 PM MDT | High Wind Warning | RIW | Fremont, Johnson, Natrona, Sweetwater | 31 hr |
Nearby
High Wind Watches in Wyoming, 2021Every high wind watch 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.