Alert archive / Wyoming / High Wind Watches in 2018

High Wind Watch 15, NWS Cheyenne, WY

February 7, 2018Albany County, Laramie County, Platte County, Wyoming

NWS Cheyenne, WY issued this high wind watch at Feb 7, 2018, 2:17 PM MST for Albany County, Laramie County, Platte County, Wyoming. It took effect at Feb 8, 2018, 5:00 AM MST. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Feb 7, 2018, 2:17 PM MST (21:17 UTC)
In effect from: Feb 8, 2018, 5:00 AM MST
Expired: Feb 8, 2018, 9:18 AM MST
In force: 4 hr
Issued by: NWS Cheyenne, WY

Counties Albany County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 66 km from the middle of the area, began a volume at 21:17 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, 9.3 hours before the alert went out and 309 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: 1645 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 289 m²/s²
0-3 km storm-relative helicity: 381 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 Feb 7, 10:29 AM MST, 3 hours 48 minutes earlier.

Area forecast discussion, Feb 7, 10:29 AM MST, 3 hours 48 minutes before

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Hazardous weather outlook, Feb 7, 8:45 AM MST, 5 hours 32 minutes before

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In the hours before

Local storm report, Feb 7, 9:09 AM MST, 5 hours 8 minutes before

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Local storm report, Feb 7, 10:12 AM MST, 4 hours 5 minutes before

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Local storm report, Feb 7, 10:18 AM MST, 3 hours 59 minutes before

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Local storm report, Feb 7, 10:31 AM MST, 3 hours 46 minutes before

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Local storm report, Feb 7, 11:53 AM MST, 2 hours 24 minutes before

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Local storm report, Feb 7, 12:36 PM MST, 1 hour 41 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
Feb 7, 8:29 AM MST	High Wind Warning	CYS	Albany, Carbon, Laramie, Platte	37 hr

Nearby

High Wind Watches in Wyoming, 2018 Every high wind watch in 2018

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.