Hail in Oregon, June 3, 2007

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT SUN JUN 3 2007

CORRECTED SPELLING WALLOWA COUNTY

.SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT...ISOLATED SHOWERS AND
THUNDERSTORMS HAVE DEVELOPED OVER GRANT...WALLOWA AND SOUTHWEST
UNION COUNTIES IN EASTERN OREGON. ALSO A FEW SHOWERS AND
THUNDERSTORMS HAVE DEVELOPED ALONG THE WASHINGTON CASCADE CREST. A
WEAK UPPER WAVE IS MOVING INTO CENTRAL OREGON AND SHOULD HELP TO
INCREASE STORM COVERAGE IN THE AREAS ALREADY MENTIONED WHILE HELPING
TO KICK OFF SHOWERS AND STORMS ELSEWHERE ACROSS THE EASTERN OREGON
AND SOUTHEAST WASHINGTON. A WEAK MARINE PUSH IS DEVELOPING WEST OF
THE CASCADES AND SHOULD BEGIN TO MOVE ACROSS THE OREGON CASCADES
EARLY THIS EVENING. THE LEADING EDGE OF THE MARINE AIR WILL FORM A
BOUNDARY THAT MAY ALLOW FOR SOME ORGANIZING OF THE THUNDERSTORMS
OVER EASTERN OREGON. OTHERWISE...AT THIS TIME IT APPEARS THAT MOST
STORMS WILL BE UNORGANIZED PULSE TYPE STORMS WITH GUSTY
WINDS...SMALL HAIL AND BRIEF DOWNPOURS. BY MIDNIGHT...THE
THUNDERSTORM THREAT SHOULD BE OVER DUE TO THE EXIT OF THE WEAK UPPER
WAVE AND A COOLER NIGHTTIME AIR MASS. AN UPPER TROUGH OVER THE
EASTERN PACIFIC WILL CONTINUE TO SLOWLY EDGE EAST MONDAY AND
TUESDAY. THIS TROUGH WILL PUSH A COLD FRONT ACROSS THE REGION MONDAY
AFTERNOON THROUGH TUESDAY MORNING. THIS FRONT WILL BRING INCREASED
CHANCES OF RAIN. IT WILL ALSO BRING COOLER TEMPERATURES AND BREEZY
WINDS...ESPECIALLY ON TUESDAY. HIGH TEMPS TUESDAY SHOULD BE 20-30
DEGREES COOLER THAN THE HIGH TEMPS THIS AFTERNOON. AS THE FRONT
MOVES INTO THE REGION MONDAY IT MAY CAUSE ISOLATED THUNDERSTORMS IN
THE AFTERNOON OVER THE EASTERN OREGON MOUNTAIN ZONES...BUT BY
TUESDAY THE AIR MASS WILL HAVE STABILIZED ENOUGH TO KEEP
THUNDERSTORMS FROM DEVELOPING THAT DAY. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY...AN UPPER LEVEL LOW WILL BE
OVER THE AREA WEDNESDAY AND THURSDAY....KEEPING A CHANCE OF
PRECIPITATION OVER EASTERN WASHINGTON AND OREGON. HIGH PRESSURE WILL
BUILD OFF THE COAST ON THURSDAY WITH DRY NORTHERLY FLOW OVER EASTERN
WASHINGTON AND OREGON. ENSEMBLE MODEL SOLUTIONS FOR FRIDAY THROUGH
SUNDAY SHOW A WIDE SPAGHETTI PLOT...LEAVING LOW CONFIDENCE IN ANY
SOLUTION. LEFT THE FORECAST DRY FRIDAY AND SATURDAY...THEN WENT TO
MOUNTAIN SHOWERS SUNDAY WHEN A FRONT MAY MOVE THROUGH. WITH THE
NORTHERLY FLOW EXPECT BELOW NORMAL TEMPERATURES. USED A BLEND OF MEX
AND ENSEMBLE MEX GUIDANCE TO GET TEMPERATURE FORECAST. COONFIELD

&&

.AVIATION...ANOTHER WAVE WILL MOVE ACROSS THE REGION THIS AFTERNOON.
THUNDERSTORMS HAVE DEVELOPED OVER EASTERN GRANT AND SOUTHWEST UNION
COUNTIES. EXPECT COVERAGE TO EXPAND SO ALL TAF SITES AND TWEB
ROUTES WILL HAVE A POSSIBILITY OF THUNDERSTORMS. GUSTY WINDS AND
CONDITIONS FALLING BELOW VFR ARE POSSIBLE UNDER THE STRONGER STORMS.
A MARINE PUSH LATER THIS EVENING WILL BRING BREEZY CONDITIONS AND
STABILIZE THE BASIN. WINDS WILL DECREASE AFTER 06Z AND BE GENERALLY
LESS THAN 15 KT MONDAY. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  63  86  56  69 /  20  20  50  40
ALW  68  86  59  70 /  20  20  50  40
PSC  65  91  58  75 /  20  20  50  30
YKM  65  87  56  72 /  20  20  40  30
HRI  64  89  58  74 /  20  20  50  30
ELN  64  82  56  66 /  20  20  50  30
RDM  54  78  48  64 /  30  20  40  30
LGD  57  85  53  64 /  30  20  40  50
GCD  55  86  51  65 /  30  20  30  50
DLS  64  79  56  68 /  20  20  40  30

&&

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

TI:YGG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
90/76/76

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
239 PM PDT SUN JUN 3 2007

ORZ041-WAZ024-501-502-026>030-ORZ042>044-049-050-501>506-041215-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-
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-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-
239 PM PDT SUN JUN 3 2007

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS
     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,
     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

ISOLATED TO SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS
AFTERNOON AND PERSIST THROUGH THIS EVENING. GUSTY WINDS AND SMALL
HAIL ARE LIKELY WITH SOME OF THESE THUNDERSTORMS. ALTHOUGH A
WIDESPREAD SEVERE WEATHER EPISODE IS NOT ANTICIPATED AT THIS
TIME...ISOLATED SEVERE STORMS PRODUCING LARGE HAIL AND LOCALLY
DAMAGING WINDS ARE A POSSIBILITY. SEE PRODUCT PDXSPSPDT FOR FURTHER
DISCUSSION.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THUNDERSTORMS MONDAY
     FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON, NORTHWEST BLUE
     MOUNTAINS, 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

THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS MONDAY IN NORTHEAST
OREGON. AN UPPER TROUGH OFF THE PACIFIC WILL MOVE INTO THE REGION
BRINGING MUCH COOLER AIR BEGINNING MONDAY.

.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/PENDLETON/CURRENTHAZARDS/HWO.HTML

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