Hail in Oregon, July 2, 2008

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
220 PM PDT WED JUL 2 2008

.SHORT TERM...A SIGNIFICANT WEATHER SITUATION IS SETTING UP FOR THE
NEXT COUPLE DAYS OVER THE PACIFIC NORTHWEST. A HOT SOUTHWEST FLOW
ALOFT BETWEEN AN UPPER RIDGE OVER THE ROCKY MOUNTAINS AND AN UPPER
LOW PRESSURE SYSTEM OFF THE COAST IS PUMPING HOT AND INCREASINGLY
UNSTABLE AIR INTO THE PACIFIC NORTHWEST. FOR THIS AFTERNOON AND THIS
EVENING THE INSTABILITY AND MOISTURE IS LIMITED AND SO EXPECTING ONLY
ISOLATED SHOWERS AND/OR THUNDERSTORMS. THESE STORMS MAY BECOME
STRONG WITH GUSTY WINDS BEFORE SUNSET...BUT ARE NOT EXPECTED TO BECOME
SEVERE. LATER TONIGHT MORE UNSTABLE AIR WITH A GREATER AMOUNT OF MID
LEVEL MOISTURE WILL MOVE INTO THE REGION. AS A RESULT THERE MAY BE
SOME ISOLATED ELEVATED NOCTURNAL THUNDERSTORMS...ESPECIALLY OVER
CENTRAL AND NORTH CENTRAL OREGON. ON THURSDAY A WAVE IN THE FLOW
WILL MOVE ACROSS THE REGION FROM SOUTHWEST TO NORTHEAST. THIS WILL
INTERACT WITH THE HOT AND MORE UNSTABLE AIR AND CREATE A FAVORABLE
ENVIRONMENT FOR A MORE ORGANIZED THUNDERSTORM OUTBREAK THURSDAY
AFTERNOON AND EVENING...AND SOME STORMS MAY BECOME SEVERE...WITH
DAMAGING WINDS AND/OR LARGE HAIL. ALSO FREQUENT LIGHTNING
AND BRIEF HEAVY RAIN ARE POSSIBLE WITH THE THUNDERSTORMS. MORE
STABLE AND COOLER AIR IS THEN EXPECTED TO MOVE INTO THE REGION ON
FRIDAY BEHIND A COLD FRONT...HOWEVER IT WILL STILL REMAIN VERY WARM.
88

.LONG TERM...SATURDAY THROUGH WEDNESDAY. A DISTURBANCE WILL PUSH
ACROSS THE AREA SATURDAY AND PRODUCE SOME SHOWERS ACROSS THE AREA.
SHOWERS WILL LINGER OVER AND NEAR THE WALLOWAS/BLUES MTNS SATURDAY
NIGHT BEFORE MAINLY DRY CONDITIONS WILL PERSIST ON SUNDAY. HIGH
PRESSURE WILL BUILD INTO THE REGION BY MONDAY WITH THE DRY AND
WARMER TEMPERATURES PERSISTING FOR THE NEXT COUPLE OF DAYS.

AFTERNOON TEMPERATURES THIS WEEKEND WILL BE NEAR NORMAL BEFORE THE
RIDGE OF HIGH PRESSURE DEVELOPS AND TEMPERATURES CLIMB ONCE AGAIN
INTO THE UPPER 90S BY MIDWEEK.

&&

.AVIATION...ALL TAF SITES SHOULD HAVE VFR CONDITIONS. HOWEVER CB
WILL BE PRESENT AND SOME LOCATIONS MAY NEAR MVFR CONDITIONS IN
LOWERING CEILINGS UNTIL 04Z AND THIS SHOULD DIMINISH BY 08Z. BY 20Z
TOMORROW KRDM AND KDLS MAY EXPERIENCE MVFR CONDITIONS IN LOWERING
CEILINGS AND VSBY IN AND NEAR THUNDERSTORMS. THE POSSIBLE MVFR
CONDITIONS SHOULD EXPAND IN COVERAGE AND MAY AFFECT THE REMAINDER
OF THE TAF SITES AFTER 22Z. IN ADDITION THERE SHOULD BE GUSTY WINDS
IN AND NEAR THUNDERSTORMS TOMORROW.

&&

.FIRE WEATHER...THE UPPER LEVEL LOW OFFSHORE WILL SWING A STRONGER
DISTURBANCE OVER THE PACIFIC NORTHWEST THURSDAY. THIS WILL CAUSE A
MARINE PUSH TO MOVE INTO THE REGION THURSDAY AND EAST OF THE
CASCADES THURSDAY AFTERNOON. THE COMBINATION OF THE UPPER LEVEL
DISTURBANCE AND THE LOW LEVEL MARINE PUSH FRONT WILL RESULT IN THE
DEVELOPMENT OF SCATTERED THUNDERSTORMS. THE AMOUNT OF LIGHTNING FROM
THESE STORMS COULD RESULT IN A NUMBER OF FRESH FIRE STARTS WITHIN
THE GRASSY AND BRUSHY AREAS OF THE LOWER COLUMBIA BASIN. AS A RESULT
WILL ISSUE A FIRE WEATHER WATCH. ALSO INCREASING WINDS IN THE BASIN
COULD FURTHER COMPLICATE THIS SITUATION LATE THURSDAY AFTERNOON AND
THURSDAY EVENING. 90

.PRELIMINARY POINT TEMPS/POPS...
PDT  65  96  64  84 /  20  30  30  20
ALW  68  96  66  85 /  20  30  30  20
PSC  68  99  68  89 /  20  30  30  20
YKM  66  95  63  84 /  20  20  20  20
HRI  66  97  65  88 /  20  30  30  20
ELN  64  93  63  82 /  20  20  20  20
RDM  55  90  52  79 /  30  20  20  20
LGD  58  94  58  82 /  20  30  30  20
GCD  59  94  57  86 /  30  30  30  30
DLS  68  89  65  81 /  30  20  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...FIRE WEATHER WATCH FROM THURSDAY MORNING THROUGH THURSDAY
     EVENING FOR ORZ631.

WA...FIRE WEATHER WATCH FROM THURSDAY MORNING THROUGH THURSDAY
     EVENING FOR WAZ631-675.

&&

TI:GRG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
88/97/97/90

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
135 PM PDT WED JUL 2 2008

UPDATED TO REMOVE THUNDERSTORMS IN CENTRAL OREGON ON FRIDAY

ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-031415-
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-
135 PM PDT WED JUL 2 2008

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

.DAY ONE...TODAY AND TONIGHT

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

AN UNSTABLE ATMOSPHERE AND A MOIST SOUTHWESTERLY FLOW WITH EMBEDDED
DISTURBANCES WILL BRING ISOLATED THUNDERSTORMS TO CENTRAL AND NORTH
CENTRAL OREGON THIS MORNING. THIS AFTERNOON AND EVENING WILL SEE
SCATTERED THUNDERSTORMS FROM THE THE OREGON CASCADES TO THE SOUTHERN
WASHINGTON CASCADES AND EASTWARD TO SOUTHERN WHEELER AND NORTHERN
GILLIAM COUNTIES AND THE OCHOCO-JOHN DAY HIGHLANDS. THE REST OF THE
AREA WILL HAVE ISOLATED THUNDERSTORMS THIS AFTERNOON AND EVENING. A
SLIGHT CHANCE OF THUNDERSTORMS WILL LINGER OVERNIGHT IN THE
CASCADES. SOME OF THESE STORMS MAY BECOME STRONG WITH LOCALLY
DAMAGING WINDS AND HEAVY RAIN. LIGHTNING CAUSED FIRES ARE POSSIBLE
BELOW 4000 FEET.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SLIGHT RISK OF SEVERE THUNDERSTORMS THURSDAY
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, 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, 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 FRIDAY
     NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY, WALLOWA COUNTY,
     NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF
     OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN
     DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS

WEATHER DISTURBANCES WILL CONTINUE TO BRING UNSTABLE CONDITIONS TO
THE FORECAST AREA...WITH A CHANCE OF THUNDERSTORMS EACH AFTERNOON
AND EVENING THROUGH FRIDAY.  THURSDAY AFTERNOON AND EVENING THERE IS
THE POTENTIAL FOR SCATTERED SEVERE THUNDERSTORMS TO DEVELOP ALONG A
COLD FRONT BOUNDARY POSITIONED ACROSS THE REGION. SOME OF THESE
STORMS COULD PRODUCE LARGE HAIL AND DAMAGING WIND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE LIKELY.

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.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OR
343 PM PDT WED JUL 02 2008

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

0250 PM     TSTM WND DMG     7 W JOHN DAY            44.42N 119.09W
06/30/2008                   GRANT              OR   COUNTY OFFICIAL

            GRANT COUNTY SHERIFF REMOVED FROM ROAD 3FT LONG LIMBS 1
            TO 2 INCH IN DIAMETER NEAR MT VERNON.

0340 PM     TSTM WND DMG     10 E UKIAH              45.13N 118.73W
06/30/2008                   UMATILLA           OR   UTILITY COMPANY

            WIND CAUSED POWER LINE TO FALL.

&&

JM