Alert archive / Wyoming / High Wind Warnings in 2021
High Wind Warning 11, NWS Riverton, WY
NWS Riverton, WY issued this high wind warning at Apr 10, 2021, 11:16 AM MDT for Big Horn County, Johnson County, Park County, Wyoming. It took effect at Apr 10, 2021, 7:00 PM MDT. It was in force for 8 hr. 4 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
- Apr 10, 2021, 11:16 AM MDT (17:16 UTC)
- In effect from
- Apr 10, 2021, 7:00 PM MDT
- Expired
- Apr 11, 2021, 2:34 AM MDT
- In force
- 8 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Johnson County, WY, Park County, WY
The radar
The Riverton/Lander radar (KRIW), 148 km from the middle of the area, began a volume at 17:19 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 |
|---|---|---|---|
| Apr 10, 8:00 PM MDT | NON-TSTM WND GST 59 | 3 Nnw Buffalo, WY | ASOS STATION KBYG BUFFALO AIRPORT. |
| Apr 10, 8:07 PM MDT | NON-TSTM WND GST 66 | 3 Nnw Buffalo, WY | ASOS STATION KBYG BUFFALO AIRPORT. |
| Apr 10, 9:02 PM MDT | NON-TSTM WND GST 66 | 3 Nnw Buffalo, WY | ASOS STATION KBYG BUFFALO AIRPORT. |
| Apr 11, 12:50 AM MDT | NON-TSTM WND GST 68 | 2 Nw Greybull, WY | ASOS STATION KGEY GREYBULL AIRPORT. |
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, 5.3 hours before the alert went out and 146 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
- 2921 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
747 WWUS75 KRIW 101716 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 1116 AM MDT Sat Apr 10 2021 WYZ004-111000- /O.UPG.KRIW.HW.A.0008.210411T0200Z-210411T0700Z/ /O.NEW.KRIW.HW.W.0011.210411T0100Z-210411T1000Z/ North Big Horn Basin- Including the cities of Basin, Greybull, Lovell, Powell, and Shell 1116 AM MDT Sat Apr 10 2021 ...HIGH WIND WARNING IN EFFECT FROM 7 PM THIS EVENING TO 4 AM MDT SUNDAY... * WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...North Bighorn Basin. * WHEN...From 7 PM this evening to 4 AM MDT Sunday. * IMPACTS...Mainly to transportation. A blow over risk for light and high profile vehicles, including campers and tractor trailers. * ADDITIONAL DETAILS...Snow showers will also be possible tonight, which could lead to low visibility and slick roads at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ WYZ010-111000- /O.UPG.KRIW.HW.A.0008.210411T0200Z-210411T0700Z/ /O.NEW.KRIW.HW.W.0011.210411T0100Z-210411T1000Z/ Northeast Johnson County- Including the city of Buffalo 1116 AM MDT Sat Apr 10 2021 ...HIGH WIND WARNING IN EFFECT FROM 7 PM THIS EVENING TO 4 AM MDT SUNDAY... * WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph expected. * WHERE...Northeast Johnson County. * WHEN...From 7 PM this evening to 4 AM MDT Sunday. * IMPACTS...Mainly to transportation including Interstates 25 and 90. An extreme blow over risk for light and high profile vehicles, including campers and tractor trailers. * ADDITIONAL DETAILS...Snow showers will also be possible tonight, which could lead to low visibility and slick roads at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ 21
2 follow-up statements
785 WWUS75 KRIW 110208 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 808 PM MDT Sat Apr 10 2021 WYZ004-111000- /O.CON.KRIW.HW.W.0011.000000T0000Z-210411T1000Z/ North Big Horn Basin- Including the cities of Basin, Greybull, Lovell, Powell, and Shell 808 PM MDT Sat Apr 10 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 AM MDT SUNDAY... * WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...North Bighorn Basin. * WHEN...Until 4 AM MDT Sunday. * IMPACTS...Mainly to transportation. A blow over risk for light and high profile vehicles, including campers and tractor trailers. * ADDITIONAL DETAILS...Snow showers will also be possible tonight, which could lead to low visibility and slick roads at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ WYZ010-111000- /O.CON.KRIW.HW.W.0011.000000T0000Z-210411T1000Z/ Northeast Johnson County- Including the city of Buffalo 808 PM MDT Sat Apr 10 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 AM MDT SUNDAY... * WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph expected. * WHERE...Northeast Johnson County. * WHEN...Until 4 AM MDT Sunday. * IMPACTS...Mainly to transportation, including Interstates 25 and 90. An extreme blow over risk for light and high profile vehicles, including campers and tractor trailers. * ADDITIONAL DETAILS...Snow showers will also be possible tonight, which could lead to low visibility and slick roads at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. Keep two hands on your steering wheel in case of a sudden, strong wind gust. && $$ For more information from the National Weather Service visit https://weather.gov/riw
514 WWUS75 KRIW 110834 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 234 AM MDT Sun Apr 11 2021 WYZ004-010-110945- /O.CAN.KRIW.HW.W.0011.000000T0000Z-210411T1000Z/ North Big Horn Basin-Northeast Johnson County- Including the cities of Basin, Greybull, Lovell, Powell, Shell, and Buffalo 234 AM MDT Sun Apr 11 2021 ...HIGH WIND WARNING IS CANCELLED... The threat for high wind gusts has ended. Wind gusts over 40 mph will still occur the rest of the night in some locations. Motorists should still be prepared for sudden wind gusts. $$ For more information from the National Weather Service visit https://weather.gov/riw
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.