Alert archive / Wyoming / High Wind Watches in 2011

High Wind Watch 18, NWS Riverton, WY

November 15, 20115 counties in Wyoming

NWS Riverton, WY issued this high wind watch at Nov 15, 2011, 3:05 PM MST for 5 counties in Wyoming. It took effect at Nov 16, 2011, 8:00 PM MST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Nov 15, 2011, 3:05 PM MST (22:05 UTC)
In effect from: Nov 16, 2011, 8:00 PM MST
Expired: Nov 17, 2011, 3:11 AM MST
In force: 7 hr
Issued by: NWS Riverton, WY

Counties Fremont County, WY, Hot Springs County, WY, Natrona County, WY, Park County, WY, Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 13 km from the middle of the area, began a volume at 22:25 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, 10.1 hours before the alert went out and 13 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: 2210 m above ground
0-6 km bulk shear: 90 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 321 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 Riverton, WY wrote its last area forecast discussion before this high wind watch went out at Nov 15, 12:12 PM MST, 2 hours 53 minutes earlier.

Area forecast discussion, Nov 15, 12:12 PM MST, 2 hours 53 minutes before

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Hazardous weather outlook, Nov 15, 5:00 AM MST, 10 hours 5 minutes before

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In the hours before

Special weather statement, Nov 15, 2:42 PM MST, 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 15, 4:51 PM MST	Winter Weather Advisory	RIW	Park	5 hr

Nearby

High Wind Watches in Wyoming, 2011 Every high wind watch in 2011

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.