Alert archive / Oregon / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 22, NWS Pendleton, OR

August 7, 20084 counties in Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Aug 7, 2008, 6:58 PM PDT for 4 counties in Oregon. It was in force for 62 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 7, 2008, 6:58 PM PDT (01:58 UTC)
Expired
Aug 7, 2008, 8:00 PM PDT
In force
62 min
Issued by
NWS Pendleton, OR
Area
Storm-based polygon

Counties Crook County, OR, Deschutes County, OR, Jefferson County, OR, Wasco County, OR

The radar

The Portland,OR radar (KRTX), 209 km from the middle of the area, began a volume at 02:00 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

Boise Airport, ID (KBOI), launched 00:00Z, 2.0 hours before the alert went out and 395 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, Boise Airport, ID at 00:00Z on 2008-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 197 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, Boise Airport, ID at 00:00Z on 2008-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
197 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
3540 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The office that day

Everything else NWS Pendleton, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 5:09 PM PDTSevere Thunderstorm WarningPDTCrook, Jefferson, Wheeler66 min
Aug 7, 6:40 PM PDTSevere Thunderstorm WarningPDTCrook, Deschutes65 min
Aug 7, 6:43 PM PDTSevere Thunderstorm WarningPDTWasco62 min
Aug 7, 7:39 PM PDTSevere Thunderstorm WarningPDTCrook, Jefferson, Wheeler66 min
Aug 7, 8:25 PM PDTSevere Thunderstorm WarningPDTWasco65 min
Aug 8, 1:44 PM PDTSevere Thunderstorm WarningPDTUmatilla61 min
Aug 8, 2:24 PM PDTSevere Thunderstorm WarningPDTMorrow, Umatilla66 min
Aug 8, 2:36 PM PDTSevere Thunderstorm WarningPDTGilliam, Jefferson, Sherman, Wasco, Wheeler54 min
Aug 8, 3:57 PM PDTSevere Thunderstorm WarningPDTMorrow63 min
Aug 8, 4:37 PM PDTSevere Thunderstorm WarningPDTMorrow, Umatilla53 min
Aug 8, 4:44 PM PDTSevere Thunderstorm WarningPDTUmatilla, Union, Wallowa61 min
Aug 7, 7:44 PM PDTSevere Thunderstorm WarningPDTKittitas61 min

Nearby

Severe Thunderstorm Warnings in Oregon, 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.