Alert archive / Wyoming / Snow Advisories in 2008

Snow Advisory 8, NWS Cheyenne, WY

March 29, 2008Crook County, Weston County, Wyoming; Dawes County, Nebraska

NWS Cheyenne, WY issued this snow advisory at Mar 29, 2008, 2:38 PM MDT for Crook County, Weston County, Wyoming; Dawes County, Nebraska. It took effect at Mar 30, 2008, 4:03 AM MDT. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Mar 29, 2008, 2:38 PM MDT (20:38 UTC)
In effect from: Mar 30, 2008, 4:03 AM MDT
Expired: Mar 31, 2008, 3:04 AM MDT
In force: 23 hr
Issued by: NWS Cheyenne, WY

Counties Dawes County, NE, Crook County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 111 km from the middle of the area, began a volume at 20:41 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, 8.6 hours before the alert went out and 355 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: 1557 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 219 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 snow advisory 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 snow advisory went out at Mar 29, 2:11 PM MDT, 27 minutes earlier.

Area forecast discussion, Mar 29, 2:11 PM MDT, 27 minutes before

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Hazardous weather outlook, Mar 29, 4:54 AM MDT, 9 hours 44 minutes before

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In the hours before

Special weather statement, Mar 29, 10:00 AM MDT, 4 hours 38 minutes before

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Local storm report, Mar 29, 11:39 AM MDT, 2 hours 59 minutes before

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Local storm report, Mar 29, 11:42 AM MDT, 2 hours 56 minutes before

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Local storm report, Mar 29, 12:26 PM MDT, 2 hours 12 minutes before

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Local storm report, Mar 29, 1:20 PM MDT, 1 hour 18 minutes before

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Local storm report, Mar 29, 1:46 PM MDT, 52 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
Mar 29, 3:16 AM MDT	High Wind Warning	CYS	Weston	15 hr
Mar 29, 2:38 PM MDT	Winter Storm Watch	CYS	Crook, Weston	21 hr

Nearby

Snow Advisories in Wyoming, 2008 Snow Advisories in Nebraska, 2008 Every snow advisory in 2008

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.