Alert archive / Oregon / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 9, NWS Pendleton, OR

June 4, 20094 counties in Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Jun 4, 2009, 3:21 PM PDT for 4 counties in Oregon. It was in force for 54 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 4, 2009, 3:21 PM PDT (22:21 UTC)
Expired: Jun 4, 2009, 4:15 PM PDT
In force: 54 min
Issued by: NWS Pendleton, OR
Area: Storm-based polygon

Counties Gilliam County, OR, Sherman County, OR, Wasco County, OR, Wheeler County, OR

The radar

The Pendleton radar (KPDT), 143 km from the middle of the area, began a volume at 22:24 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 4, 1:09 PM PDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 10.4 hours before the alert went out and 387 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: 76 J/kg
Mixed-layer CIN: -197 J/kg
Mixed-layer LCL: 1989 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 70 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 4, 2:38 PM PDT, 43 minutes earlier.

Area forecast discussion, Jun 4, 2:38 PM PDT, 43 minutes before

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Hazardous weather outlook, Jun 4, 5:00 AM PDT, 10 hours 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT THU JUN 4 2009

ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-051200-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
CENTRAL OREGON-LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-
WALLOWA COUNTY-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN-
OCHOCO-JOHN DAY HIGHLANDS-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY-
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
NORTHWEST BLUE MOUNTAINS-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
500 AM PDT THU JUN 4 2009

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

.DAY ONE...TODAY AND TONIGHT

SLIGHT RISK OF SEVERE THUNDERSTORMS
     EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN
     COLUMBIA RIVER GORGE OF WASHINGTON, LOWER COLUMBIA BASIN OF
     WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON,
     NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA RIVER GORGE OF
     OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, LOWER COLUMBIA
     BASIN OF OREGON, GRANDE RONDE VALLEY, WALLOWA COUNTY,
     FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON, NORTHERN BLUE
     MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF OREGON,
     NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN DAY
     BASIN, OCHOCO-JOHN DAY HIGHLANDS

THUNDERSTORMS
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, YAKIMA VALLEY

AN UPPER LOW PUMPING MOIST UNSTABLE AIR INTO THE REGION WILL ALLOW
SHOWERS AND THUNDERSTORMS TO REDEVELOP OVER MOST OF THE AREA
TODAY. THE BEST CHANCE FOR THUNDERSTORMS WILL BE IN CENTRAL AND
NORTHEAST OREGON AS WELL AS SOUTHEAST WASHINGTON. THE STORM
PREDICTION CENTER IN NORMAN OKLAHOMA HAS PLACED THESE AREAS IN A
SLIGHT RISK OF SEVERE STORMS. THE MAIN THREAT FROM THESE STORMS WILL
BE HEAVY RAIN AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORMS FRIDAY
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
     GORGE OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF
     WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA RIVER
     GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, LOWER
     COLUMBIA BASIN OF OREGON, GRANDE RONDE VALLEY, WALLOWA COUNTY,
     FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON, NORTHERN BLUE
     MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF OREGON,
     NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN DAY
     BASIN, OCHOCO-JOHN DAY HIGHLANDS

THUNDERSTORMS SATURDAY
     NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY, WALLOWA COUNTY,
     NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF
     OREGON, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS

SCATTERED AFTERNOON AND EVENING THUNDERSTORMS WILL AGAIN BE LIKELY
ON FRIDAY AS THE LOW MOVES INLAND. DRIER CONDITIONS ARE EXPECTED ON
SATURDAY...YET THUNDERSTORMS MAY STILL BE POSSIBLE IN THE HIGHER
TERRAIN OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON. NORTHWESTERLY
FLOW ALOFT WILL BRING A CHANCE OF MOUNTAIN SHOWERS SUNDAY THROUGH
THE END OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

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

GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:

WWW.WRH.NOAA.GOV/PDT/CURRENTHAZARDS/HWO.HTML

ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN
CURRENTHAZARDS.

In the hours before

Local storm report, Jun 4, 11:16 AM PDT, 4 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
1116 AM PDT THU JUN 04 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 PM     HEAVY RAIN       6 SE BEND               44.00N 121.22W
06/03/2009  M1.01 INCH       DESCHUTES          OR   TRAINED SPOTTER

            VERY HEAVY RAIN PRODUCED 0.48 INCHES IN 15 MINUTES...AND
            STORM TOTAL OF 1.01 INCHES RAIN IN 4 HOURS. FREQUENT
            LIGHTNING. DE-18.

&&

AA

Special weather statement, Jun 4, 1:44 PM PDT, 1 hour 37 minutes before

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Local storm report, Jun 4, 2:55 PM PDT, 26 minutes before

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Special weather statement, Jun 4, 3:09 PM PDT, 12 minutes before

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Local storm report, Jun 4, 3:18 PM PDT, 3 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 3, 6:26 PM PDT	Special Weather Statement	PDT	Deschutes	49 min
Jun 4, 1:44 PM PDT	Special Weather Statement	PDT	Jefferson	61 min
Jun 4, 1:56 PM PDT	Severe Thunderstorm Warning	PDT	Crook, Deschutes, Jefferson	64 min
Jun 4, 3:09 PM PDT	Special Weather Statement	PDT	Wasco	66 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2009 Every severe thunderstorm warning in 2009

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.