442
FXUS66 KPDT 072307
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
407 PM PDT TUE APR 7 2026
KEY MESSAGES
1. BREEZY TO WINDY CONDITIONS TODAY WITH CONTINUED ABOVE AVERAGE
TEMPERATURES
2. INCREASED CHANCES OF THUNDERSTORMS AND PRECIPITATION FRIDAY AND
SATURDAY
DISCUSSION
CURRENT SATELLITE SHOWS SOME HIGHER LEVEL CLOUDS BEING SWEPT OVER
THE OR CASCADES INTO DESCHUTES JEFFERSON AND WASCO COUNTIES. MOSTLY
SUNNY CONDITIONS WILL PERSIST THROUGH THE DAY TODAY WITH PERIODS OF
BREEZY TO WINDY CONDITIONS. A WIND ADVISORY REMAINS IN EFFECT FOR
KITTITAS VALLEY THROUGH 5 PM THIS AFTERNOON FOR SUSTAINED WINDS OF
25-35 AND GUSTS TO 45 MPH. ELSEWHERE WINDS WILL BE BREEZY WITH
SUSTAINED WINDS OF 15-20 AND GUSTS TO 35 MPH WITH 70-90% CONFIDENCE
IN THE WINDS COMING TO FRUITION. GROUND OBSERVATIONS ARE ALREADY
SHOWING SOME AREAS SEEING THESE WINDS.
TEMPERATURES TODAY WILL BE A BIT COOLER THAN YESTERDAY BY NEARLY 10
DEGREES, HOWEVER, IN OFFICE COMPARISONS SHOWS TEMPERATURES TO BE 5
TO 10 DEGREES ABOVE SEASONAL AVERAGE. 70-80% OF THE NBM RAW ENSEMBLES
SHOW THE BASIN WILL SEE NEAR 70 DEGREES TODAY WHILE THE FOOTHILLS,
GORGE, ADJACENT VALLEYS AND CENTRAL OR WILL SEE TEMPERATURES IN THE
UPPER 60S. TEMPERATURES WILL REMAIN ABOVE SEASONAL AVERAGE BETWEEN 5-
10% THROUGH FRIDAY AHEAD OF THE PATTERN CHANCE WITH TEMPERATURES
REMAINING IN THE UPPER 60S TO LOW 70S.
MODELS ARE IN RELATIVELY FIRM AGREEMENT WITH A PATTERN SHIFT THAT
WILL BEGIN FRIDAY AND OVER THE WEEKEND. CLUSTERS SO HOWEVER, SHOW
THERE IS A POSITION AND OR TIMING UNCERTAINTY WITHIN THE ENSEMBLES.
ENSEMBLES DO SHOW THERE TO BE AN INCREASE IN PRECIPITATION AS WELL
AS CHANCES OF THUNDERSTORMS AS THIS SYSTEM MOVES IN. MODELS SHOW THE
UPPER LEVEL CUT-OFF LOW TO FINALLY MAKE ITS WAY TOWARDS THE COAST OF
CALIFORNIA BEFORE BEING COMBINED BACK INTO THE 500 MB FLOW. THE
LEADING EDGE OF THE UPPER LEVEL LOW WILL BRING IN SOUTHWESTERLY FLOW
WITH SOME WARM AIR ADVECTION AS WELL AS SOME INSTABILITY. LATEST
CAMS SHOW MUCAPES EXCEEDING 250 J/KG WITH SHEAR NEARING 20 KTS. THIS
IS ENOUGH TO TRIP OFF A FEW THUNDERSTORMS FRIDAY ACROSS CENTRAL OR
AND THE EASTERN MOUNTAINS. BY SATURDAY, MORE ADVECTION MOVES INTO
THE REGION AS WELL AS HIGHER PRECIPITATION AMOUNTS. INSTABILITY
INCREASE AND CAMS SHOW MUCAPES INCREASING TO 300-500 J/KG AND SHEAR
WINDS NEARING 5 KTS. NBM RAW ENSEMBLES SHOW A 12 HR PROBABILITY OF
THUNDERS NEARING 25% STRETCHING FROM THE EASTERN MOUNTAINS, ACROSS
THE FOOTHILLS OF THE BLUES AND INTO WALLOWA VALLEY. MODELS SOUNDING
ALSO SHOW RELATIVELY HIGH DCAPES IN THE 250-300 RANGE WHICH COULD
LEAD TO STRONG OUTFLOW BOUNDARIES OF 40-50 MPH.
FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOONS PRECIPITATION AMOUNTS
FOR 24 ARE 0.25 INCHES ALONG THE EASTERN MOUNTAINS AND ALONG THE
BLUES AS WELL AS THE OR CASCADES CRESTS WITH 60-80% CONFIDENCE IN
AMOUNTS. SATURDAY TO SUNDAYS TOTAL ACCUMULATIONS ARE AND ADDITIONAL
0.25 INCHES FOR THE AFOREMENTIONED REGIONS AS WELL AS THE FOOTHILLS
OF THE BLUES AND THE WA CASCADES WITH 50-70% CONFIDENCE IN
AMOUNTS. 90
AVIATION /00Z TAFS THROUGH 00Z THURSDAY/
VFR CONDITIONS ARE EXPECTED ACROSS THE REGION THROUGH WEDNESDAY.
GUSTY WEST TO NORTHWEST WINDS MAINLY IN THE 20 TO 30 KT RANGE,
WILL CONTINUE TO DIMINISH WITH ALL SITES 10 KTS OR LESS BY LATE
THIS EVENING. ALL SITES WILL THEN BE 10 KTS OR LESS FOR THE
REMAINDER OF THE PERIOD.
PRELIMINARY POINT TEMPS/POPS
PDT 37 66 40 70 / 0 0 0 0
ALW 41 66 43 70 / 0 0 0 0
PSC 37 70 39 74 / 0 0 0 0
YKM 36 68 39 70 / 0 0 0 0
HRI 37 69 39 72 / 0 0 0 0
ELN 33 63 36 66 / 0 0 0 0
RDM 33 69 36 70 / 0 0 0 10
LGD 36 66 39 69 / 0 0 0 0
GCD 36 68 39 71 / 0 0 0 10
DLS 40 71 43 74 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...90
AVIATION...77
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