Hail in Washington, April 14, 2009

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
215 PM PDT TUE APR 14 2009

.SHORT TERM...TONIGHT THROUGH FRIDAY. SHOWERS ARE INCREASING IN
COVERAGE ON DOPPLER RADAR WITH LIGHT SNOW OBSERVED DOWN TO THE
VALLEY FLOORS.  A NARROW ELONGATED TROUGH ALONG THE WEST COAST WILL
CONTINUE TO BRING SCATTERED SNOW SHOWERS TO THE AREA THROUGH THE
NIGHT...ALTHOUGH MOST OF THE SHOWERS WILL OCCUR BEFORE SUNSET.  A
SHORTWAVE ROTATING AROUND THE LOW WILL APPROACH THE EAST SIDE OF THE
OREGON CASCADES TONIGHT RESULTING IN ACCUMULATIONS OF 1-3 INCHES
WITH THE HEAVIEST SNOWFALL SOUTH AND WEST OF BEND.  THIS MEETS
WINTER WEATHER ADVISORY FOR SNOW IN CENTRAL OREGON AND WILL ISSUE IN
THE AFTERNOON PACKAGE.  THERE COULD BE A STRAY LIGHTNING STRIKE OR
TWO IN THE FORECAST AREA DUE TO THE SHALLOW CONVECTION BUT JUST NOT
ENOUGH TO INCLUDE IN THE FORECAST.

THE UPPER TROUGH WILL TRACK EASTWARD TONIGHT WITH THE CENTER OF THE
UPPER LOW OVER THE GREAT BASIN BY WEDNESDAY MORNING.  PRECIPITATION
WILL GRADUALLY TAPER OFF FROM THE WEST-NORTHWEST ON WEDNESDAY.
SHOWERS WILL END WEDNESDAY NIGHT AS AN UPPER LEVEL RIDGE SHIFTS
EASTARD.  ON THURSDAY AND FRIDAY...DRY AND WARMER CONDITIONS ARE
EXPECTED WITH THE EXCEPTION OF AREAS NEAR THE CASCADE CREST.  THE
AXIS OF THE UPPER LEVEL RIDGE WILL BE EAST OF THE CASCADES...LEAVING
WESTERN WA/OR UNDER A MOIST SW FLOW ALOFT. PRECIPITATION WILL SPREAD
JUST EAST OF THE CASCADES DURING THIS TIME.  JOHNSON

.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY. A WEAK DISTURBANCE WILL
PASS THROUGH THE AREA FRIDAY NIGHT BUT SHOULD ONLY BRING SOME
CLOUDINESS ACROSS THE AREA. MID LEVEL HIGH PRESSURE WILL BUILD INTO
THE TWO STATE AREA THIS WEEKEND AND BRING MUCH WARMER TEMPERATURES
TO OR/WA. AFTERNOON HIGH TEMPS ARE FORECAST TO CLIMB INTO THE 70S
AND CONTINUE INTO SUNDAY ALONG WITH THE DRY CONDITIONS. THE HIGH
PRESSURE WILL CENTER ITSELF OVER NEVADA AND WILL CONTINUE TO
INFLUENCE OUR AREA WITH ABOVE NORMAL TEMPERATURES AND DRY WEATHER
INTO NEXT WEEK.

&&

.AVIATION...BRIEF IFR CONDITIONS ARE POSSIBLE OVER TAF SITE KRDM DUE
TO LOWERING CEILINGS AND VSBY IN SNOW SHOWERS UNTIL 06Z. OTHERWISE
VFR AND OCCASIONAL MVFR CONDITIONS ARE LIKELY FOR ALL TAF SITES
DUE TO LOWERING CEILINGS. BY 15Z TOMORROW ALL TAF SITES SHOULD
IMPROVE TO VFR CONDITIONS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  34  55  36  61 /  30  20  10   0
ALW  36  57  39  63 /  40  20  10   0
PSC  35  62  36  67 /  20  10   0   0
YKM  29  59  30  64 /  20  10   0   0
HRI  34  60  33  65 /  30  10   0   0
ELN  31  58  33  63 /  20   0   0   0
RDM  22  52  24  60 /  50  10   0   0
LGD  31  49  31  58 /  40  30  20   0
GCD  29  48  31  57 /  40  30  10   0
DLS  35  59  37  64 /  40  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...WINTER WEATHER ADVISORY UNTIL 4 AM PDT WEDNESDAY FOR ORZ043.

WA...NONE.
&&

TI:GGG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
85/97/97

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
120 PM PDT TUE APR 14 2009

UPDATED TO REMOVE THUNDERSTORMS FOR DAY ONE AND REWORD DISCUSSION

ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-151415-
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-
120 PM PDT TUE APR 14 2009

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

.DAY ONE...REST OF TODAY AND TONIGHT

SNOW
     NORTH CENTRAL OREGON, CENTRAL OREGON

A COLD LOW PRESSURE SYSTEM WILL BRING SCATTERED SHOWERS THROUGH THIS
EVENING WITH LIGHT SNOW DOWN TO THE BASIN FLOOR.  ACCUMULATIONS WILL
BE LIGHT (LITTLE OR NO ACCUMULATION BELOW 2000 FEET).  THE ONLY
EXCEPTION WILL BE IN CENTRAL AND NORTH CENTRAL OREGON WHERE UP TO
TWO INCHES ARE EXPECTED TONIGHT.  A COUPLE OF INCHES OF SNOW IS
POSSIBLE IN THE HIGHER MOUNTAINS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

THE UPPER LOW PRESSURE SYSTEM WILL MOVE SLOWLY TO THE SOUTHEAST WITH
HIGH PRESSURE BUILDING INTO THE REGION BEHIND THE LOW. THIS WILL
RESULT IN A GRADUAL WARMING AND DRYING TREND THROUGH THE WEEKEND
INTO EARLY NEXT WEEK. ONLY A FEW LIGHT RAIN OR SNOW SHOWERS OVER THE
MOUNTAINS ARE EXPECTED ON WEDNESDAY...WITH NO PRECIPITATION EXPECTED
AFTER WEDNESDAY. TEMPERATURES WILL CLIMB INTO THE MID 70S TO AROUND
80 BY SUNDAY AND MONDAY IN THE VALLEYS WITH MAINLY 60S TO NEAR 70 IN
THE MOUNTAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED DUE TO SNOW THIS EVENING.

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
201 PM PDT TUE APR 14 2009

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

0157 PM     SNOW             NNW UKIAH               45.13N 118.93W
04/14/2009  E0.1 INCH        UMATILLA           OR   TRAINED SPOTTER

            22 MPH WINDS MIXED WITH SNOW WAS REPORTED RESTRICTING THE
            VISIBILITY TO LESS THAN A HALF MILE AND AS LOW AS AN
            EIGHTH OF A MILE WITH THE HEAVY GUSTS. THE SNOW HAD JUST
            BEGAN 15 MINUTES PRIOR AND WITH TEMPERATURES IN THE MID
            30S VERY LITTLE ACCUMULATION HAD OCCURRED. THE OBSERVER
            DESCRIBED IT AS A THIN DUSTING.

&&

RQB

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PENDLETON OR
203 PM PDT TUE APR 14 2009

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

0157 PM     SNOW             NNW UKIAH               45.13N 118.93W
04/14/2009  E0.1 INCH        UMATILLA           OR   TRAINED SPOTTER

            22 MPH WINDS MIXED WITH SNOW WAS REPORTED RESTRICTING THE
            VISIBILITY TO LESS THAN A HALF MILE AND AS LOW AS AN
            EIGHTH OF A MILE WITH THE HEAVY GUSTS. THE SNOW HAD JUST
            BEGAN 15 MINUTES PRIOR AND WITH TEMPERATURES IN THE MID
            30S VERY LITTLE ACCUMULATION HAD OCCURRED. THE OBSERVER
            DESCRIBED IT AS A THIN DUSTING.

&&

RQB