Alert archive / Idaho / Special Weather Statements in 2011

Special Weather Statement, NWS Boise, ID

August 4, 2011Twin Falls County, Idaho

NWS Boise, ID issued this special weather statement at Aug 4, 2011, 3:12 PM MDT for Twin Falls County, Idaho. It was in force for 48 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 4, 2011, 3:12 PM MDT (21:12 UTC)
Expired
Aug 4, 2011, 4:00 PM MDT
In force
48 min
Issued by
NWS Boise, ID

County Twin Falls County, ID

The radar

The Pocatello radar (KSFX), 183 km from the middle of the area, began a volume at 21:13 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

Elko, NV (KLKN), launched 12:00Z, 9.2 hours before the alert went out and 141 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-pSkew-T log-p diagram, Elko, NV at 12:00Z on 2011-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Elko, NV at 12:00Z on 2011-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
24 J/kg
Mixed-layer CIN
-402 J/kg
Mixed-layer LCL
2637 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
125 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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The office that day

Everything else NWS Boise, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 8:20 AM MDTSpecial Weather StatementBOIOwyhee55 min
Aug 4, 9:49 AM MDTSpecial Weather StatementBOIAda41 min
Aug 4, 11:05 AM MDTSpecial Weather StatementBOIAda40 min
Aug 4, 2:27 PM MDTSpecial Weather StatementBOITwin Falls48 min
Aug 4, 4:20 PM MDTSpecial Weather StatementBOIJerome25 min
Aug 4, 4:41 PM MDTSpecial Weather StatementBOI49 min
Aug 4, 5:15 PM MDTSpecial Weather StatementBOIBoise30 min
Aug 4, 5:19 PM MDTSpecial Weather StatementBOITwin Falls26 min
Aug 4, 5:28 PM MDTSevere Thunderstorm WarningBOIOwyhee, Twin Falls32 min
Aug 4, 5:46 PM MDTSpecial Weather StatementBOIBoise59 min

Nearby

Special Weather Statements in Idaho, 2011Every special weather statement in 2011

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.