Alert archive / Idaho / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 20, NWS Boise, ID

August 8, 2014Twin Falls County, Idaho

NWS Boise, ID issued this severe thunderstorm warning at Aug 8, 2014, 3:08 PM MDT for Twin Falls County, Idaho. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 8, 2014, 3:08 PM MDT (21:08 UTC)
Expired
Aug 8, 2014, 4:00 PM MDT
In force
52 min
Issued by
NWS Boise, ID
Area
Storm-based polygon

County Twin Falls County, ID

The radar

The Boise radar (KCBX), 180 km from the middle of the area, began a volume at 21:09 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, 9.1 hours before the alert went out and 170 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 2014-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 2014-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 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
35 J/kg
Mixed-layer CIN
-228 J/kg
Mixed-layer LCL
1839 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 6:59 PM MDTFlash Flood WarningBOIBoise, Elmore61 min
Aug 7, 9:04 PM MDTFlash Flood WatchBOIOwyhee, Twin Falls6 hr
Aug 8, 3:23 AM MDTFlash Flood WatchBOIBoise, Camas, Elmore15 hr
Aug 8, 2:05 PM MDTFlash Flood WarningBOIBoise, Camas, Elmore4 hr
Aug 8, 2:14 PM MDTSpecial Weather StatementBOITwin Falls46 min
Aug 8, 2:55 PM MDTSpecial Weather StatementBOITwin Falls50 min
Aug 8, 5:33 PM MDTSpecial Weather StatementBOIOwyhee42 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2014Every severe thunderstorm warning in 2014

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.