337
FXUS66 KPDT 141750
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1050 AM PDT WED OCT 14 2026
KEY MESSAGES
- FRIDAY LOOKS BREEZY OVER THE FOOTHILLS OF NORTHERN BLUES,
WALLOWA MOUNTAINS AND THEIR RESPECTIVE VALLEYS.
- SATURDAY IN CONJUNCTION WITH A SHORTWAVE WILL BRING BREEZY
CONDITIONS THROUGH THE GORGE AND COLUMBIA BASIN.
DISCUSSION
BENIGN WEATHER THROUGH THE DAY TODAY. MID AND UPPER-LEVEL WATER
VAPOR BANDS SHOW CLOUDS PUSHING INTO OUR WASHINGTON PORTION OF
OUR CWA. TAF SITES THAT ARE ENCOMPASSED IN THOSE CLOUDS,
OVERNIGHT LOWS COULD BE WARMER THAN THE REST OF THE REGION. A
CUTOFF UPPER-LEVEL LOW IS CENTERED OVER LOWER NEVADA AND ARIZONA
AND IS DEEPENING WHILE THE RIDGE FLOW BECOMES ZONAL OVER THE
PNW. NEXT COUPLE OF DAYS THE LOW WILL BEGIN TO LIFT AND
TRANSITION US INTO A STRONGER RIDGE.
SHORT TERM WITH RIDGING OVER THE CWA, TEMPERATURES WILL RISE 10-15
DEGREES ABOVE CLIMATE NORMS. WHILE OUR TEMPERATURES ARE RISING OVER
THE WEEK, OVERNIGHT CHANCES OF SUB-FREEZING TEMPERATURES IN OUR
LOWER VALLEYS STILL REMAIN IN THE 70-90% RANGE OF PROBABILITY. THOSE
AREAS WHERE FREEZING IS LIKELY TO OCCUR ARE INELIGIBLE FOR FREEZE
WARNINGS.
FRIDAY MODELS ARE SHOWING A TIGHTENING OF THE PRESSURE
GRADIENTS THROUGH THE GRANDE RONDE VALLEY DUE TO A PRESSURE
GRADIENT BETWEEN THE COLUMBIA BASIN AND THE TREASURE VALLEY. IN
OFFICE CALCULATIONS SHOW A TIGHTENING OF NEARLY 7 MB AND WIND
DIRECTION WILL BE FROM THE SOUTHEAST. NAM AND RRFS ARE
SUGGESTING BREEZY CONDITIONS ALONG THE FOOTHILLS OF THE NORTHERN
BLUES, WALLOWA MOUNTAINS AND THEIR RESPECTIVE VALLEYS. NBM
PROBABILITIES FOR GREATER THAN 30 MPH AT THIS TIME HOVER AROUND
95%.
LOOKING AHEAD TOWARDS THE WEEKEND, MODELS ARE SUGGESTING A FEW WEAK
SHORTWAVES MOVING THROUGH THE FLOW. CLUSTERS ARE IN GOOD AGREEMENT
THAT A SHORTWAVE IS GOING TO MOVE THROUGH WITH SLIGHT VARIANCE IN
AMPLITUDE WHICH WILL EFFECT ANY AMOUNT OF PRECIPITATION AND BRING
BREEZY CONDITIONS. SATURDAY THE SHORTWAVE MOVING ACROSS OUR REGION
WILL AID IN BRINGING MORE BREEZY CONDITIONS THROUGH GORGE AND
COLUMBIA BASIN. EARLY NEXT WEEK ALONGSIDE THE PATTERN CHANGE WILL BE
THE BEST CHANCES RAIN.
AVIATION /18Z TAFS THROUGH 18Z THURSDAY/
VFR CONDITIONS TO PERSIST THROUGHOUT THE TAF PERIOD FOR ALL SITES.
CLOUDY CONDITIONS PRESENT UNTIL THE EVENING WITH SKIES CLEARING BY 24Z
FOR TAF SITES. CALM TO LIGHT WINDS PRESENT WITHIN THE REGION.
PRELIMINARY POINT TEMPS/POPS
PDT 64 36 68 37 / 0 0 0 0
ALW 65 41 69 41 / 0 0 0 0
PSC 67 34 71 36 / 0 0 0 0
YKM 65 39 70 41 / 0 0 0 0
HRI 66 36 70 38 / 0 0 0 0
ELN 62 35 67 37 / 0 0 0 0
RDM 66 27 69 30 / 0 0 0 0
LGD 63 31 68 34 / 0 0 0 0
GCD 64 33 70 37 / 0 0 0 0
DLS 70 41 74 45 / 0 0 0 0
PRELIMINARY POINT TEMPS/POPS
PDT 68 38 68 38 / 0 0 0 0
ALW 67 40 69 44 / 0 0 0 0
PSC 70 37 72 37 / 10 0 0 0
YKM 70 43 70 41 / 10 0 0 0
HRI 69 39 69 37 / 0 0 0 0
ELN 68 40 66 38 / 20 0 0 0
RDM 68 31 74 33 / 0 0 0 0
LGD 67 36 69 41 / 0 0 0 0
GCD 67 36 75 39 / 0 0 0 0
DLS 75 46 74 45 / 10 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...18/90
AVIATION...07/95
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