Alert archive / Wyoming / Special Weather Statements in 2013

Special Weather Statement, NWS Cheyenne, WY

August 8, 2013Laramie County, Wyoming

NWS Cheyenne, WY issued this special weather statement at Aug 8, 2013, 6:22 PM MDT for Laramie County, Wyoming. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 8, 2013, 6:22 PM MDT (00:22 UTC)
Expired: Aug 8, 2013, 7:00 PM MDT
In force: 38 min
Issued by: NWS Cheyenne, WY

County Laramie County, WY

The radar

The Cheyenne radar (KCYS), 66 km from the middle of the area, began a volume at 00:23 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

Denver, CO (KDEN), launched 00:00Z, 0.4 hours before the alert went out and 226 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: 370 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1855 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 8, 5:53 PM MDT, 29 minutes earlier.

Area forecast discussion, Aug 8, 5:53 PM MDT, 29 minutes before

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Hazardous weather outlook, Aug 8, 2:56 PM MDT, 3 hours 26 minutes before

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In the hours before

Local storm report, Aug 8, 3:28 PM MDT, 2 hours 54 minutes before

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Special weather statement, Aug 8, 3:28 PM MDT, 2 hours 54 minutes before

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Special weather statement, Aug 8, 3:44 PM MDT, 2 hours 38 minutes before

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Local storm report, Aug 8, 3:56 PM MDT, 2 hours 26 minutes before

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Special weather statement, Aug 8, 4:46 PM MDT, 1 hour 36 minutes before

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Special weather statement, Aug 8, 6:22 PM MDT, 0 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
Aug 8, 7:30 PM MDT	Special Weather Statement	CYS	Niobrara	60 min
Aug 8, 7:54 PM MDT	Areal Flood Advisory	CYS	Laramie	4 hr
Aug 8, 8:19 PM MDT	Special Weather Statement	CYS	Niobrara	26 min
Aug 8, 8:44 PM MDT	Special Weather Statement	CYS	Platte	61 min
Aug 8, 9:41 PM MDT	Special Weather Statement	CYS	Goshen	49 min
Aug 9, 1:25 PM MDT	Special Weather Statement	CYS	Sioux	50 min
Aug 9, 2:12 PM MDT	Special Weather Statement	CYS	Dawes, Sioux	48 min

Nearby

Special Weather Statements in Wyoming, 2013 Every special weather statement in 2013

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.