Alert archive / Oregon / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 35, NWS Pendleton, OR

August 7, 2003Morrow County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Aug 7, 2003, 4:40 AM PDT for Morrow County, Oregon. It was in force for 65 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, 2003, 4:40 AM PDT (11:40 UTC)
Expired: Aug 7, 2003, 5:45 AM PDT
In force: 65 min
Issued by: NWS Pendleton, OR
Area: Counties, with a storm outline in the text

County Morrow County, OR

The nearest sounding before it

Salem/Mcnary, OR (KSLE), launched 00:00Z, 11.7 hours before the alert went out and 273 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: 1842 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 110 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 Aug 7, 3:30 AM PDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 7, 3:30 AM PDT, 1 hour 10 minutes before

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Hazardous weather outlook, Aug 6, 5:00 AM PDT, 23 hours 40 minutes before

ORZ041>050-WAZ024>030-071200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT WED AUG 6 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.

.DAY ONE...

SHOWERS AND ISOLATED THUNDERSTORMS HAVE FORMED OVER GRANT COUNTY AND
ARE MOVING NORTH THROUGH THE MOUNTAINS OF NORTHEAST OREGON. A
DISTURBANCE WILL MOVE NORTH ALONG THE CASCADES THIS AFTERNOON.
INCREASED INSTABILITY AND DAYTIME HEATING WILL COMBINE TO TRIGGER
SCATTERED THUNDERSTORMS...MAINLY OVER THE MOUNTAINS OF NORTHEAST
OREGON AND ALONG THE CASCADES. STRONG WINDS...RAIN...HAIL...AND
LIGHTNING WILL ACCOMPANY THESE STORMS.

.DAYS TWO THROUGH SEVEN...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

A MOIST SOUTHWEST FLOW PATTERN ALOFT WILL CONTINUE THROUGH THE
PERIOD. HOWEVER THE ATMOSPHERE WILL BE MORE STABLE WITH LESS SHOWER
AND THUNDERSTORM ACTIVITY EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 8:48 PM PDT	Severe Thunderstorm Warning	PDT	Jefferson	57 min
Aug 6, 9:13 PM PDT	Severe Thunderstorm Warning	PDT	Wasco	62 min
Aug 6, 9:49 PM PDT	Severe Thunderstorm Warning	PDT	Sherman	56 min
Aug 6, 10:10 PM PDT	Severe Thunderstorm Warning	PDT	Gilliam	65 min
Aug 7, 2:01 AM PDT	Severe Thunderstorm Warning	PDT	Benton	59 min
Aug 7, 2:07 AM PDT	Severe Thunderstorm Warning	PDT	Benton	53 min
Aug 7, 2:16 AM PDT	Severe Thunderstorm Warning	PDT	Benton, Franklin	59 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2003 Every severe thunderstorm warning in 2003

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.