Alert archive / Oregon / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 9, NWS Pendleton, OR

June 30, 2008Grant County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Jun 30, 2008, 2:16 PM PDT for Grant County, Oregon. It was in force for 59 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: Jun 30, 2008, 2:16 PM PDT (21:16 UTC)
Expired: Jun 30, 2008, 3:15 PM PDT
In force: 59 min
Issued by: NWS Pendleton, OR
Area: Storm-based polygon

County Grant County, OR

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 9.3 hours before the alert went out and 386 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: 2140 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 2:10 PM PDT, 6 minutes earlier.

Area forecast discussion, Jun 30, 2:10 PM PDT, 6 minutes before

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Hazardous weather outlook, Jun 30, 1:00 PM PDT, 1 hour 16 minutes before

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In the hours before

Local storm report, Jun 30, 8:30 AM PDT, 5 hours 46 minutes before

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Local storm report, Jun 30, 8:33 AM PDT, 5 hours 43 minutes before

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Local storm report, Jun 30, 12:25 PM PDT, 1 hour 51 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 1:53 PM PDT	Severe Thunderstorm Warning	PDT	Union	67 min
Jun 30, 3:10 PM PDT	Severe Thunderstorm Warning	PDT	Grant, Morrow, Umatilla, Union	65 min
Jun 30, 4:06 PM PDT	Severe Thunderstorm Warning	PDT	Umatilla, Union	54 min
Jun 30, 4:54 PM PDT	Severe Thunderstorm Warning	PDT	Umatilla	66 min
Jun 30, 2:45 AM PDT	Severe Thunderstorm Warning	PDT	Benton, Franklin	60 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2008 Every 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.