Alert archive / Wyoming / High Wind Watches in 2015

High Wind Watch 20, NWS Cheyenne, WY

December 8, 20157 counties in Wyoming

NWS Cheyenne, WY issued this high wind watch at Dec 8, 2015, 3:16 PM MST for 7 counties in Wyoming. It took effect at Dec 9, 2015, 11:00 AM MST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 8, 2015, 3:16 PM MST (22:16 UTC)
In effect from
Dec 9, 2015, 11:00 AM MST
Expired
Dec 9, 2015, 2:45 AM MST
In force
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 114 km from the middle of the area, began a volume at 22:22 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, 10.3 hours before the alert went out and 279 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-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2015-12-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2015-12-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 254 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
1737 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
254 m²/s²
0-3 km storm-relative helicity
330 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 high wind watch 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 high wind watch went out at Dec 8, 11:16 AM MST, 4 hours earlier.

Area forecast discussion, Dec 8, 11:16 AM MST, 4 hours before
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Hazardous weather outlook, Dec 8, 11:57 AM MST, 3 hours 19 minutes before
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In the hours before

Local storm report, Dec 8, 9:47 AM MST, 5 hours 29 minutes before
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Local storm report, Dec 8, 11:02 AM MST, 4 hours 14 minutes before
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Local storm report, Dec 8, 12:35 PM MST, 2 hours 41 minutes before
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Local storm report, Dec 8, 12:37 PM MST, 2 hours 39 minutes before
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Local storm report, Dec 8, 12:38 PM MST, 2 hours 38 minutes before
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Nearby

High Wind Watches in Wyoming, 2015Every high wind watch in 2015

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.