Alert archive / Wyoming / Special Weather Statements in 2013

Special Weather Statement, NWS Cheyenne, WY

May 16, 2013Goshen County, Wyoming

NWS Cheyenne, WY issued this special weather statement at May 16, 2013, 2:00 PM MDT for Goshen County, Wyoming. It was in force for 45 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: May 16, 2013, 2:00 PM MDT (20:00 UTC)
Expired: May 16, 2013, 2:45 PM MDT
In force: 45 min
Issued by: NWS Cheyenne, WY

County Goshen County, WY

The radar

The Cheyenne radar (KCYS), 118 km from the middle of the area, began a volume at 20:01 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 (KDNR), launched 12:00Z, 8.0 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-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: 23 J/kg
Mixed-layer CIN: -352 J/kg
Mixed-layer LCL: 2211 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 30 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 May 16, 11:47 AM MDT, 2 hours 13 minutes earlier.

Area forecast discussion, May 16, 11:47 AM MDT, 2 hours 13 minutes before

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Hazardous weather outlook, May 16, 12:32 PM MDT, 1 hour 28 minutes before

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In the hours before

Local storm report, May 16, 12:34 PM MDT, 1 hour 26 minutes before

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Special weather statement, May 16, 1:18 PM MDT, 42 minutes before

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Local storm report, May 16, 1:29 PM MDT, 31 minutes before

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Special weather statement, May 16, 1:33 PM MDT, 27 minutes before

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Local storm report, May 16, 1:59 PM MDT, 1 minute before

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Special weather statement, May 16, 2:00 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
May 16, 1:18 PM MDT	Special Weather Statement	CYS	Platte	42 min
May 16, 1:33 PM MDT	Special Weather Statement	CYS	Laramie	42 min
May 16, 2:13 PM MDT	Special Weather Statement	CYS	Laramie	62 min
May 16, 3:38 PM MDT	Special Weather Statement	CYS	Carbon	37 min
May 16, 11:08 AM MDT	Special Weather Statement	CYS	Cheyenne	37 min
May 16, 12:12 PM MDT	Special Weather Statement	CYS	Cheyenne	48 min
May 16, 2:44 PM MDT	Special Weather Statement	CYS	Kimball	31 min
May 16, 3:02 PM MDT	Special Weather Statement	CYS	Scotts Bluff	43 min
May 16, 3:06 PM MDT	Special Weather Statement	CYS	Kimball	39 min
May 16, 3:25 PM MDT	Special Weather Statement	CYS	Cheyenne	50 min
May 16, 3:44 PM MDT	Special Weather Statement	CYS	Scotts Bluff	61 min
May 16, 3:50 PM MDT	Special Weather Statement	CYS	Box Butte	40 min
May 16, 4:49 PM MDT	Special Weather Statement	CYS	Box Butte	26 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.