Alert archive / Utah / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 5, NWS Grand Junction, CO

August 10, 2008Uintah County, Utah

NWS Grand Junction, CO issued this severe thunderstorm warning at Aug 10, 2008, 4:41 PM MDT for Uintah County, Utah. It was in force for 49 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 10, 2008, 4:41 PM MDT (22:41 UTC)
Expired
Aug 10, 2008, 5:30 PM MDT
In force
49 min
Issued by
NWS Grand Junction, CO
Area
Storm-based polygon

County Uintah County, UT

The radar

The Grand Junction radar (KGJX), 163 km from the middle of the area, began a volume at 22:42 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

Grand Junction, CO (KGJT), launched 12:00Z, 10.7 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, Grand Junction, CO at 12:00Z on 2008-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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, Grand Junction, CO at 12:00Z on 2008-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 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
13 J/kg
Mixed-layer CIN
-193 J/kg
Mixed-layer LCL
1205 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 6:02 PM MDTFlash Flood WarningGJTOuray118 min
Aug 9, 7:45 PM MDTAreal Flood AdvisoryGJTMesa3 hr
Aug 9, 8:26 PM MDTAreal Flood AdvisoryGJTMesa3 hr
Aug 9, 8:45 PM MDTAreal Flood AdvisoryGJTMoffat, Rio Blanco3 hr
Aug 10, 5:53 PM MDTSevere Thunderstorm WarningGJTGarfield, Rio Blanco52 min
Aug 9, 7:23 PM MDTAreal Flood AdvisoryGJTGrand3 hr

Nearby

Severe Thunderstorm Warnings in Utah, 2008Every severe thunderstorm warning in 2008

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.