Wildfire in Oregon, July 24 to 26, 2006

AREA FORECAST DISCUSSION...CORRECTION
NATIONAL WEATHER SERVICE PENDLETON OR
1100 AM PDT MON JUL 24 2006

CORRECTED PLACEMENT OF AVIATION DISCUSSION

.SHORT TERM...A WEAK UPPER LEVEL SHORTWAVE IS MOVING EASTWARD
THROUGH THE FORECAST AREA THIS MORNING. SOMEWHAT DRIER AIR
ASSOCIATED WITH THE WAVE IS MOVING EAST OF THE CASCADES WITH THIS
SYSTEM. IN ADDITION...THE WAVE WILL ALLOW MARINE AIR TO SPILL OVER
THE CASCADE CRESTS FOR A WEAK MARINE PUSH THIS AFTERNOON...TONIGHT
AND TUESDAY. AS SUCH THE DAYTIME HIGH TEMPERATURES WILL RETREAT BY
SEVERAL DEGREES ON TUESDAY. FOR TODAY THE MARINE AIR WILL BE LATE IN
ARRIVING SO NOT MUCH RELIEF IS IN STORE FROM THE HEAT WAVE. MAX
TEMPERATURES THIS AFTERNOON WILL BREAK THE CENTURY MARK IN THE LOWER
COLUMBIA BASIN..THE FOOTHILLS OF THE BLUE MOUNTAINS...THE YAKIMA
VALLEY...THE JOHN DAY VALLEY IN GILLIAM...WHEELER AND GRANT COUNTIES
AND IN THE GRANDE RONDE VALLEY. HEAT ADVISORIES WILL REMAIN IN
EFFECT THOUGH 8 PM THIS EVENING FOR THESE AREAS. CURRENT FORECAST
LOOKS TO BE ON TRACK FOR ISOLATED SHOWERS AND THUNDERSTORMS THIS
AFTERNOON/EVENING IN CENTRAL OREGON.  POLAN

&&

AVIATION...VFR CONDITIONS WILL PREVAIL FOR ALL TAF SITES AND ALONG
ALL TWEB ROUTES FOR THE NEXT 24 HOURS. ISOLATED THUNDERSTORMS MAY
DEVELOP ALONG THE SOUTHERN PORTION OF TWB366 (SOUTH OF KRDM) THIS
AFTERNOON. ML

&&

.PREVIOUS DISCUSSION... (ISSUED 245 AM PDT MON JUL 24 2006)

SHORT TERM...TODAY THROUGH TUESDAY...UPPER RIDGE TO CONTINUE SLOWLY
FLATTENING THROUGH TUESDAY. AS A RESULT DAYTIME HIGH TEMPS SHOULD
BEGIN TO COOL AS HEIGHTS DECREASE AND WEST FLOW INCREASES. STILL A
NUMBER OF ZONES WILL HAVE AFTERNOON TEMPS AVERAGING ABOVE 100
DEGREES AND WILL CONTINUE CURRENT HEAT ADVISORIES. THUNDERSTORM
ACTIVITY HAS DIED OFF EARLY THIS MORNING...BUT A WEAK UPPER WAVE
CONTINUES TO MOVE EAST-NORTHEAST ACROSS SOUTH-CENTRAL OREGON. AS
SUCH COULD SEE AN ISOLATED STORM AROUND DAYBREAK...ESPECIALLY IN
CROOK OR GRANT COUNTIES IN CENTRAL OREGON. OTHERWISE HEATING WILL
DESTABILIZE THE ATMOSPHERE THIS AFTERNOON AND AGAIN TUESDAY
AFTERNOON. THE DRIER WEST FLOW WILL LIMIT MOISTURE AVAILABILITY FOR
THUNDERSTORM DEVELOPMENT. ENOUGH MOISTURE LOOKS TO BE AVAILABLE FOR
ISOLATED THUNDERSTORMS OVER PORTIONS OF CENTRAL OREGON TODAY AND
TUESDAY...AND THE NORTHEAST OREGON MOUNTAINS ON TUESDAY. 90

LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...MODELS IN GOOD AGREEMENT
WITH SHOWING A WESTERLY FLOW OVER THE REGION ON WEDNESDAY. THIS WILL
PREVENT MONSOONAL MOISTURE FROM MOVING NORTH INTO THE AREA AND THUS
CONDITIONS WILL BE MORE STABLE AND DRY. THE FLOW WILL REMAIN FROM
THE WEST THROUGH THE WEEK WITH TEMPERATURES STAYING RELATIVELY
STEADY EACH DAY. A TROUGH OF LOW PRESSURE WILL THEN APPROACH THE
PACIFIC NORTHWEST ON FRIDAY AND START TO TURN THE FLOW MORE
SOUTHWESTERLY. A DRY COLD FRONT WILL MOVE THROUGH THE REGION FRIDAY
AND FRIDAY NIGHT...WHICH WILL BRING BREEZY WINDS AND COOL
TEMPERATURES A FEW DEGREES ON SATURDAY. DK

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...HEAT ADVISORY UNTIL 8 PM PDT THIS EVENING FOR ORZ044-ORZ049-
     ORZ501-ORZ504-ORZ505.

WA...HEAT ADVISORY UNTIL 8 PM PDT THIS EVENING FOR WAZ027-WAZ029.

     HEAT ADVISORY UNTIL 8 PM PDT TUESDAY FOR WAZ028.

&&

TI:GGG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
99/84/84

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
503 AM PDT MON JUL 24 2006

WAZ024-501-502-026>030-ORZ041>044-049-050-501>506-251130-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
KITTITAS VALLEY-YAKIMA VALLEY-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-
503 AM PDT MON JUL 24 2006

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

.DAY ONE...TODAY AND TONIGHT

EXCESSIVE HEAT
     YAKIMA VALLEY, LOWER COLUMBIA BASIN OF WASHINGTON, FOOTHILLS
     OF THE BLUE MOUNTAINS OF WASHINGTON, LOWER COLUMBIA BASIN OF
     OREGON, GRANDE RONDE VALLEY, FOOTHILLS OF THE BLUE MOUNTAINS
     OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES,
     JOHN DAY BASIN

THUNDERSTORMS
     CENTRAL OREGON, OCHOCO-JOHN DAY HIGHLANDS

HIGH PRESSURE WILL CONTINUE TODAY WITH HOT TEMPERATURES EXPECTED
ACROSS THE REGION. LOCATIONS BELOW 3000 FEET WILL SEE TEMPERATURES
FROM 100 TO NEAR 110 DEGREES...WHILE MOUNTAIN LOCATIONS WILL SEE
TEMPERATURES IN THE UPPER 80S AND 90S. A HEAT ADVISORY REMAINS IN
EFFECT FOR MANY LOCATIONS IN NORTHEAST OREGON AND SOUTHEAST
WASHINGTON. FOR THE LATEST DETAILS...PLEASE REFER TO PRODUCT
PDXNPWPDT (WWUS76 KPDT).

MOISTURE WILL LINGER OVER PORTIONS OF CENTRAL OREGON TODAY. AS A
RESULT...INSTABILITY FROM THE DAYTIME HEATING WILL CAUSE THE
DEVELOPMENT OF ISOLATED THUNDERSTORMS...MAINLY DURING THE AFTERNOON
AND EVENING HOURS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

EXCESSIVE HEAT TUESDAY
     LOWER COLUMBIA BASIN OF WASHINGTON

THUNDERSTORMS TUESDAY
     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

GRADUAL COOLING WILL BEGIN TUESDAY AS MARINE AIR BEGINS TO PUSH EAST
OF THE CASCADES. THE LOWER COLUMBIA BASIN OF WASHINGTON WILL GET
SOME OF THIS AIR...BUT WILL NOT COOL ENOUGH TUESDAY TO GET OUT OF
THE 100 PLUS DEGREE RANGE. THUS THE HEAT ADVISORY WILL CONTINUE
THROUGH TUESDAY EVENING FOR THAT AREA. FOR FURTHER DETAILS...PLEASE
REFER TO PRODUCT PDXNPWPDT (WWUS76 KPDT).

ISOLATED THUNDERSTORMS MAY AGAIN DEVELOP OVER PORTIONS OF THE REGION
DUE TO LINGERING MOISTURE AND HEATING INDUCED INSTABILITY.

.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/PENDLETON/CURRENTHAZARDS/HWO.HTML

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