Alert archive / Wyoming / Special Weather Statements in 2012

Special Weather Statement, NWS Riverton, WY

April 12, 2012Hot Springs County, Wyoming

NWS Riverton, WY issued this special weather statement at Apr 12, 2012, 2:03 PM MDT for Hot Springs County, Wyoming. It was in force for 42 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: Apr 12, 2012, 2:03 PM MDT (20:03 UTC)
Expired: Apr 12, 2012, 2:45 PM MDT
In force: 42 min
Issued by: NWS Riverton, WY

County Hot Springs County, WY

The radar

The Riverton/Lander radar (KRIW), 68 km from the middle of the area, began a volume at 20:06 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

Rapid City, SD (KUNR), launched 12:00Z, 8.1 hours before the alert went out and 440 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: 929 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 134 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 Riverton, WY wrote its last area forecast discussion before this special weather statement went out at Apr 12, 11:20 AM MDT, 2 hours 43 minutes earlier.

Area forecast discussion, Apr 12, 11:20 AM MDT, 2 hours 43 minutes before

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Hazardous weather outlook, Apr 12, 8:34 AM MDT, 5 hours 29 minutes before

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In the hours before

Local storm report, Apr 12, 9:58 AM MDT, 4 hours 5 minutes before

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Special weather statement, Apr 12, 1:11 PM MDT, 52 minutes before

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Special weather statement, Apr 12, 2:03 PM MDT, 0 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
Apr 12, 8:30 AM MDT	High Wind Warning	RIW	Fremont, Johnson, Natrona, Sweetwater	6 hr
Apr 12, 2:39 PM MDT	Special Weather Statement	RIW	Hot Springs	51 min
Apr 12, 3:18 PM MDT	Special Weather Statement	RIW	Washakie	42 min

Nearby

Special Weather Statements in Wyoming, 2012 Every special weather statement in 2012

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.