Alert archive / Wyoming / High Wind Warnings in 2020
High Wind Warning 21, NWS Riverton, WY
NWS Riverton, WY issued this high wind warning at Nov 14, 2020, 8:49 PM MST for Fremont County, Natrona County, Sweetwater County, Wyoming. It took effect at Nov 15, 2020, 3:00 AM MST. It was in force for 15 hr. 3 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
- Nov 14, 2020, 8:49 PM MST (03:49 UTC)
- In effect from
- Nov 15, 2020, 3:00 AM MST
- Expired
- Nov 15, 2020, 6:00 PM MST
- In force
- 15 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Natrona County, WY, Sweetwater County, WY
The radar
The Riverton/Lander radar (KRIW), 65 km from the middle of the area, began a volume at 03:51 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 |
|---|---|---|---|
| Nov 15, 6:12 AM MST | NON-TSTM WND GST 62 | 4 Se Evansville, WY | MESONET STATION WY61 I25 - HAT SIX. |
| Nov 15, 6:52 AM MST | NON-TSTM WND GST 59 | 2 Sse Casper, WY | MESONET STATION WY47 CASPER 2.1 SW (WYDOT). |
| Nov 15, 8:50 AM MST | NON-TSTM WND GST 72 | 7 N Bairoil, WY | MESONET STATION CAMW4 MUDDY GAP 7 SW. |
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 00:00Z, 3.8 hours before the alert went out and 62 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
- 2486 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
209 WWUS75 KRIW 150349 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 849 PM MST Sat Nov 14 2020 WYZ019-020-151300- /O.NEW.KRIW.HW.W.0021.201115T1000Z-201116T0000Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 849 PM MST Sat Nov 14 2020 ...HIGH WIND WARNING IN EFFECT FROM 3 AM TO 5 PM MST SUNDAY... * WHAT...Southwest winds 30 to 40 mph with gusts up to 65 mph expected. * WHERE...Green Mountains and Rattlesnake Range and Natrona County Lower Elevations. * WHEN...From 3 AM to 5 PM MST Sunday. * IMPACTS...Mainly to transportation. An elevated risk for a blow over especially for light and high profile vehicles, including campers and tractor trailers. * ADDITIONAL DETAILS...Some of the strongest wind gusts will likely occur along outer Drive south of Casper. Please keep two hands on your steering wheel in case of a sudden, strong wind gust. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. && $$ 21
2 follow-up statements
260 WWUS75 KRIW 150942 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 242 AM MST Sun Nov 15 2020 WYZ019-020-160100- /O.EXT.KRIW.HW.W.0021.201115T1000Z-201116T0100Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 242 AM MST Sun Nov 15 2020 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 6 PM MST THIS EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts up to 65 mph expected. * WHERE...Green Mountains and Rattlesnake Range and Natrona County Lower Elevations. * WHEN...Until 6 PM MST this evening. * IMPACTS...Mainly to transportation. An elevated risk for a blow over especially for light and high profile vehicles, including campers and tractor trailers. * ADDITIONAL DETAILS...Some of the strongest wind gusts will likely occur along outer Drive south of Casper. Please keep two hands on your steering wheel in case of a sudden, strong wind gust. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution if you must drive. && $$ For more information from the National Weather Service visit https://weather.gov/riw
843 WWUS75 KRIW 160053 NPWRIW URGENT - WEATHER MESSAGE National Weather Service Riverton WY 553 PM MST Sun Nov 15 2020 WYZ019-020-160200- /O.EXP.KRIW.HW.W.0021.000000T0000Z-201116T0100Z/ Green Mountains and Rattlesnake Range- Natrona County Lower Elevations- Including the cities of Jeffrey City and Casper 553 PM MST Sun Nov 15 2020 ...HIGH WIND WARNING WILL EXPIRE AT 6 PM MST THIS EVENING... Wind speeds have decreased below warning thresholds. Therefore, the high wind warning will be allowed to expire at 6 PM. Westerly wind of 20 to 35 mph will persist through most of Sunday evening. $$ For more information from the National Weather Service visit https://weather.gov/riw
Nearby
High Wind Warnings in Wyoming, 2020Every high wind warning in 2020
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.