Alert archive / Wyoming / Winter Storm Warnings in 2010

Winter Storm Warning 10, NWS Cheyenne, WY

November 20, 2010Albany County, Carbon County, Wyoming

NWS Cheyenne, WY issued this winter storm warning at Nov 20, 2010, 1:01 PM MST for Albany County, Carbon County, Wyoming. It was in force for 53 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: Nov 20, 2010, 1:01 PM MST (20:01 UTC)
Expired: Nov 22, 2010, 5:37 PM MST
In force: 53 hr
Issued by: NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY

The radar

The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 19:59 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, 8.0 hours before the alert went out and 230 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2022 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 346 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cheyenne, WY wrote its last area forecast discussion before this winter storm warning went out at Nov 20, 12:52 PM MST, 9 minutes earlier.

Area forecast discussion, Nov 20, 12:52 PM MST, 9 minutes before

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Hazardous weather outlook, Nov 20, 11:14 AM MST, 1 hour 47 minutes before

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In the hours before

Local storm report, Nov 20, 9:50 AM MST, 3 hours 11 minutes before

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Special weather statement, Nov 20, 10:07 AM MST, 2 hours 54 minutes before

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Local storm report, Nov 20, 10:20 AM MST, 2 hours 41 minutes before

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Special weather statement, Nov 20, 11:24 AM MST, 1 hour 37 minutes before

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Special weather statement, Nov 20, 12:08 PM MST, 53 minutes before

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Local storm report, Nov 20, 12:42 PM MST, 19 minutes before

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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 20, 6:50 AM MST	High Wind Warning	CYS	Albany, Carbon	7 hr

Nearby

Winter Storm Warnings in Wyoming, 2010 Every winter storm warning in 2010

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.