Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 291713 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1013 AM PDT SUN MAR 29 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...SKIES WILL BE PARTLY CLOUDY TODAY INTO MONDAY AS MID
AND HIGH LEVEL CLOUDS CONTINUE TO MOVE ACROSS THE AREA WITH A
SOUTHWEST FLOW ALOFT. HIGH TEMPS WILL REMAIN WELL ABOVE NORMAL WITH
60S TO LOWER 70S. MODELS STILL SHOW A COLD FRONT MOVING THROUGH LATE
MONDAY NIGHT AND TUESDAY WITH RAIN AND WIND. MUCH COLDER TUESDAY
THROUGH THURSDAY WITH AN UPPER LEVEL TROUGH OVER THE PACIFIC
NORTHWEST. 94

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE FOR THE NEXT 24
HOURS. GENERALLY SCATTERED MID AND HIGH LEVEL CLOUDS WILL PASS OVER
THE REGION TODAY WITH CEILINGS SCT-BKN AT 10-15K FT. CEILINGS WILL
LIFT TO AROUND 20K FEET OVERNIGHT. WINDS ARE EXPECTED TO BE BELOW 12
KTS FOR THE NEXT 24 HOURS. PERRY

&&

.PREV DISC... /ISSUED 440 AM PDT SUN MAR 29 2015/

SHORT TERM...TODAY THROUGH TUESDAY...A BROAD AND FLAT HIGH PRESSURE
RIDGE ALOFT WILL PUSH INCOMING STORMS TO THE NORTH OF THE CWA TODAY
AND MONDAY LEAVING DRY CONDITIONS WITH A SLIGHT WARMING TREND. WINDS
WILL BE LIGHT TODAY THROUGH MONDAY. THE NEXT WEATHER SYSTEM WILL
MOVE INTO THE CWA MONDAY NIGHT AND TUESDAY. THIS SYSTEM WILL BRING A
CHANCE OF SHOWERS...ESPECIALLY OVER THE MOUNTAINS AND DURING THE DAY
TUESDAY. THE BIGGEST CONCERN HOWEVER WILL BE THE INCREASING WINDS
DURING THE DAY TUESDAY. PRESSURE GRADIENTS BECOME TIGHT WITH THE
COLD FRONT TUESDAY. WIND SPEEDS HAVE THE POTENTIAL OF REACHING WIND
ADVISORY CRITERIA IN THE LOWER COLUMBIA BASIN AND THE BLUE MOUNTAIN
FOOTHILLS AS WELL AS OVER CENTRAL OREGON...THE JOHN DAY HIGHLANDS
AND OVER THE NORTHEAST MOUNTAINS. THIS WILL BE MONITORED CLOSELY FOR
THE POTENTIAL NEED OF WIND ADVISORIES. RIGHT NOW WINDS ARE NOT
EXPECTED TO REACH WARNING CRITERIA. HOWEVER THEY MAY STILL CAUSE
SOME BLOWING DUST NEAR FRESHLY PLOWED FIELDS. PRECIPITATION WITH
THIS SYSTEM DOES NOT LOOK TO IMPRESSIVE SO AM ONLY EXPECTING LIGHT
RAIN WHICH WILL QUICKLY DRY AND ALLOW FOR BLOWING DUST ON TUESDAY.
TEMPERATURES ON TUESDAY WILL COOL OFF ABOUT 10 DEGREES WITH LOWER
ELEVATION READINGS ONLY IN THE 50S. TODAY AND MONDAY TEMPERATURES IN
THE LOWER ELEVATIONS WILL BE IN THE 60S TO LOWER 70S. 88

LONG TERM...TUESDAY NIGHT THROUGH SATURDAY...PROGRESSIVE WEST TO
NORTHWEST FLOW WILL CONTINUE FOR THE EXTENDED.  OVERALL EXPECT A
CHANCE OF SHOWERS EACH DAY OVER THE MOUNTAINS AND A SLIGHT CHANCE OF
SHOWERS OVER THE LOWER ELEVATIONS.  SNOW LEVELS WILL BE ON THE LOWER
SIDE...WITH 2500-3500FT AT NIGHT AND 3500-4500 DURING THE DAY.
THEREFORE MOST CONVECTIVE SHOWERS THAT OCCUR OVER THE MOUNTAINS WILL
LIKELY BE SNOW.  MODELS STILL HINT AT AFTERNOON INSTABILITY...SO THE
POSSIBILITY THAT THUNDER COULD BE ASSOCIATED WITH THESE SHOWERS
CAN`T BE RULED OUT.  BUT CONFIDENCE IS STILL NOT HIGH ENOUGH TO ADD
INTO THE FORECAST. HIGHS WILL GENERALLY BE IN THE 50S TO LOWER
60S...WITH 40S MOUNTAINS.  LOWS WILL BE IN THE LOWER TO MID
30S...WITH 20S MOUNTAINS.  RIGHT NOW EXPECT THAT ISOLATED SPOTS
ACROSS THE LOWER ELEVATIONS COULD SEE FREEZING OR SLIGHTLY BELOW
FREEZING TEMPERATURES EACH MORNING...BUT RIGHT NOW WEDNESDAY NIGHT
COULD HAVE MORE SCATTERED AREAS FALLING TO OR SLIGHTLY BELOW
FREEZING. WILL CONTINUE TO MONITOR AND MAKE ADJUSTMENTS
ACCORDINGLY.  WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  65  44  68  43 /   0   0   0  10
ALW  66  46  69  44 /   0   0   0  10
PSC  68  43  71  45 /   0   0   0  10
YKM  66  42  67  40 /   0  10   0  10
HRI  68  42  71  43 /   0   0   0  10
ELN  65  40  66  39 /   0  10   0  10
RDM  65  36  68  37 /   0   0   0  10
LGD  62  38  67  39 /   0   0  10  10
GCD  64  35  70  33 /   0  10  10  10
DLS  68  44  70  45 /   0  10  10  10

&&

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

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

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