Alert archive / Wyoming / Snow Squall Warnings in 2020
Snow Squall Warning 2, NWS Riverton, WY
NWS Riverton, WY issued this snow squall warning at Dec 27, 2020, 2:26 PM MST for Natrona County, Wyoming. It was in force for 49 min. 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 27, 2020, 2:26 PM MST (21:26 UTC)
- Expired
- Dec 27, 2020, 3:15 PM MST
- In force
- 49 min
- Issued by
- NWS Riverton, WY
- Area
- Storm-based polygon
County Natrona County, WY
The radar
The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 21:24 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
Grand Junction, CO (KGJT), launched 12:00Z, 9.4 hours before the alert went out and 449 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
- 1844 m above ground
- 0-6 km bulk shear
- 116 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this snow squall warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before this snow squall warning went out at Dec 27, 12:55 PM MST, 1 hour 31 minutes earlier.
Area forecast discussion, Dec 27, 12:55 PM MST, 1 hour 31 minutes before
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</html>Hazardous weather outlook, Dec 27, 12:43 PM MST, 1 hour 43 minutes before
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Special weather statement, Dec 27, 2:13 PM MST, 13 minutes before
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</html>Nearby
Snow Squall Warnings in Wyoming, 2020Every snow squall 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.