Funnel Cloud in Oregon, August 6, 2004

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE PENDLETON OREGON
215 PM PDT FRI AUG 6 2004

.SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT...A TIGHTLY WRAPPED AREA
OF LOW PRESSURE OFF THE WASHINGTON COAST IS FINALLY MAKING EASTWARD
PROGRESS THIS AFTERNOON.  A BROAD AREA OF SOUTHWESTERLY FLOW OUT
AHEAD OF THE SYSTEM HAS SPREAD MID AND UPPER-LEVEL MOISTURE ACROSS
THE AREA.  A LINE OF SHOWERS HAS FIRED UP ACROSS EASTERN OREGON.
THIS LINE IS LIKELY ASSOCIATED WITH AN UPPER-LEVEL COLD FRONT
WORKING ITS WAY ACROSS THE AREA.  AS THIS FRONT MOVES THROUGH UNION
AND WALLOWA COUNTIES ISOLATED STRONG THUNDERSTORMS MAY STILL DEVELOP
THIS AFTERNOON...WITH THE POSSIBILITY OF LARGE HAIL.  THUNDERSTORM
DEVELOPMENT ELSEWHERE THIS AFTERNOON AND EVENING WILL REMAIN
ISOLATED.  THE FRONT WILL BE OUT OF THE AREA BY 5 PM.  BLOWING DUST
WILL CONTINUE TO BE A PROBLEM ACROSS THE COLUMBIA BASIN AND
FOOTHILLS OF THE BLUE MOUNTAINS THROUGH 6 PM.  VISIBILITIES WILL
DROP BELOW 1 MILE AT TIMES.

THE LOW WILL TRACK ACROSS WASHINGTON THIS AFTERNOON.  AS UPPER-LEVEL
WINDS SHIFT OUT OF THE WEST BEHIND THE LOW SUBSIDENCE WILL SLACKEN
THE SHOWERS EAST OF THE CASCADES.  LOW PRESSURE WILL BEGIN TO FORM
AT THE SURFACE IN RESPONSE TO THE SUBSIDENCE.  THIS SURFACE LOW WILL
HELP TIGHTEN PRESSURE GRADIENTS AND KEEP WINDS IN THE BREEZY TO
WINDY RANGE ACROSS THE COLUMBIA BASIN...COLUMBIA RIVER GORGE...AND
KITTITAS VALLEY.

OVERNIGHT INTO TOMORROW THE LOW WILL MOVE WELL EAST OF THE
AREA...AND HIGH PRESSURE WILL BEGIN TO BUILD ACROSS THE AREA THROUGH
THE REMAINDER OF THE SHORT-TERM.  TEMPERATURES WILL GRADUALLY
WARM...ALTHOUGH THEY WILL REMAIN BELOW AVERAGE UNTIL SUNDAY.  WINDS
SHOULD SLACKEN QUICKLY BY TOMORROW MORNING.  CANTIN

.LONG TERM...MONDAY THROUGH FRIDAY. MID LEVEL HIGH PRESSURE WILL
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL HIGH
TEMPERATURES THROUGH THE WEEK. A COUPLE OF WEAK DISTURBANCES WILL
BRUSH THE PACNW TUESDAY AND THURSDAY BUT THIS MAY ONLY SPREAD SOME
MID/HIGH LEVEL CLOUDINESS AND LOWER AFTER HIGH TEMPERATURES A DEGREE
OR TWO.

&&

.PRELIMINARY POINT TEMPS/POPS...
PENDLETON (AIRPORT) 053 080 052 088 / 020 000 000 000
WALLA WALLA         056 081 056 089 / 020 000 000 000
TRI-CITIES          056 082 050 091 / 020 000 000 000
YAKIMA              053 080 051 089 / 020 000 000 000
HERMISTON           053 082 048 090 / 020 000 000 000
ELLENSBURG          055 076 049 085 / 020 000 000 000
REDMOND             042 079 045 088 / 005 000 000 000
LA GRANDE           051 079 050 088 / 020 000 000 000
JOHN DAY            046 082 049 091 / 010 000 000 000
THE DALLES          057 079 054 090 / 010 000 000 000
&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

96

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OREGON
250 PM PDT FRI AUG 6 2004

ORZ041>050-WAZ024>030-071200-
NORTH CENTRAL OREGON-CENTRAL OREGON-LOWER COLUMBIA BASIN (OR)-
FOOTHILLS OF THE BLUE MOUNTAINS (OR)-BLUE MOUNTAINS-JOHN DAY BASIN-
OCHOCO-JOHN DAY HIGHLANDS-GRANDE RONDE VALLEY-WALLOWA COUNTY-
EASTERN COLUMBIA RIVER GORGE (WA)-
EAST SLOPES OF THE SOUTHERN CASCADES-KITTITAS VALLEY-YAKIMA VALLEY-
LOWER COLUMBIA BASIN (WA)-FOOTHILLS OF THE BLUE MOUNTAINS (WA)-
NORTHWEST BLUE MOUNTAINS-
250 PM PDT FRI AUG 6 2004

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

.DAY ONE...

BLOWING DUST
     LOWER COLUMBIA BASIN (WA), FOOTHILLS OF THE BLUE MOUNTAINS (WA),
     LOWER COLUMBIA BASIN (OR), FOOTHILLS OF THE BLUE MOUNTAINS (OR)

BLOWING DUST WILL DROP VISIBILITIES BELOW A MILE AT TIMES ACROSS THE
COLUMBIA BASIN OF OREGON AND WASHINGTON...AS WELL AS OVER THE
FOOTHILLS OF THE BLUE MOUNTAINS.  WINDS WILL SLACKEN LATE THIS
AFTERNOON DROPPING THE BLOWING DUST THREAT.

THUNDERSTORMS
     EASTERN COLUMBIA RIVER GORGE (WA), EAST SLOPES OF THE SOUTHERN
     CASCADES, KITTITAS VALLEY, YAKIMA VALLEY, NORTHWEST BLUE
     MOUNTAINS, EASTERN COLUMBIA RIVER GORGE (OR), BLUE MOUNTAINS,
     JOHN DAY BASIN, COLUMBIA BASIN OF WASHINGTON AND OREGON,
     FOOTHILLS OF THE BLUE MOUNTAINS IN OREGON AND WASHINGTON

STRONG THUNDERSTORMS
     GRANDE RONDE VALLEY, WALLOWA COUNTY

AN UPPER-LEVEL LOW PRESSURE SYSTEM WILL MOVE THROUGH THE AREA THIS
AFTERNOON.  COLD AIR ALOFT...JETSTREAM DYNAMICS...AND A MOIST
AIRMASS WILL HELP GENERATE CONVECTION ACROSS THE AREA. EXTREME
NORTHEAST OREGON INCLUDING NORTHERN UNION COUNTY AND WALLOWA COUNTY
WILL SEE THE BEST POTENTIAL FOR THUNDERSTORMS THIS AFTERNOON AS THE
JET MOVES DIRECTLY OVERHEAD.  A DEEP LAYER OF MOISTURE THAT EXISTS
OVER THAT AREA WILL RAISE THE HAIL GROWTH POTENTIAL.
AN...ISOLATED...STRONG TO SEVERE STORM WITH HAIL UP TO 0.75 INCH
WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.

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

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

WWW.WRH.NOAA.GOV/PENDLETON/FORECAST/HWOGRAPHICS/HWOGRAPHICS.PHP

ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE G IN
HWOGRAPHICS AND THE G IN HWOGRAPHICS.PHP.