714
FXUS66 KPDT 080517
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1017 PM PDT TUE OCT 7 2025
AVIATION...06Z TAFS...(NO CHANGE SINCE 00Z)
VFR CONDITIONS TO
PREVAIL THROUGH THE PERIOD. WINDS WILL BE LIGHT, 12KTS OR LESS,
AND DIURNALLY/TERRAIN DRIVEN. LAWHORN/82
PREV DISCUSSION
/ISSUED 449 PM PDT TUE OCT 7 2025/
DISCUSSION
EFFECTIVE RADIATIVE COOLING WITH CLEAR, CALM
CONDITIONS CONTINUES OVERNIGHT AS THE UPPER-LEVEL RIDGE OF HIGH
PRESSURE CONTINUES TO TAKE PLACE OVER THE PACIFIC NORTHWEST. WE'LL
SEE ANOTHER ROUND ISOLATED/PATCHY AREAS OF FROST ACROSS THE
COLDEST PARTS OF CENTRAL OR AND OTHER PARTS OF THE SOUTHERN
BLUES. LOWS TONIGHT WILL BE A TAD WARMER THAN LAST NIGHT, SO NOT
EXPECTING AS MUCH FREEZING TONIGHT. AREAS ACROSS THE HIGHER
TERRAINS AND THE DEEP SHELTERED VALLEY AREAS WILL SEE LOWS DIP
JUST BELOW/AT FREEZING (30-50% CONFIDENCE).
OUR NEXT WEATHER SYSTEM WILL ORIGINATE FROM THE GULF OF ALASKA,
AS A TROUGH DIGS SOUTH THROUGH THE MID-WEEK, GRADUALLY
TRANSITIONING INTO A LOW PRESSURE SYSTEM THROUGH THURSDAY. AFTER
THE INITIAL LOW PROGRESSES PASS THE AREA, A SECOND SHORTWAVE IS
EXPECTED TO DEVELOP RIGHT BEHIND THE LOW, TO EXTEND RAIN/MOUNTAIN
SNOW CHANCES THROUGH SUNDAY/EARLY MONDAY. PRECIP CHANCES WILL BE
HIGHEST FRIDAY GOING INTO SUNDAY, WITH CHANCES HIGHER IN
ELEVATED/MOUNTAIN REGIONS (70-90% CHANCE) THAN IN THE BASIN
(30-50% CHANCE). SNOW LEVELS WILL DROP TO 4500-5000 FEET SATURDAY-
SUNDAY, ALLOWING CHANCES FOR MEASURABLE SNOW TO ACCUMULATE IN THE
MOUNTAINS (50-80% CHANCE). AS THE NEXT SHORTWAVE MAKES ITS WAY
INTO THE REGION SUNDAY, MODELS SUGGEST WINDS WILL GET STRONGER,
ESPECIALLY ACROSS THE COLUMBIA BASIN/GORGE AND THE CASCADE GAPS.
NBM SUGGESTS 40-60% CHANCES OF WIND GUSTS 45 MPH OR GREATER GOING
THROUGH SUNDAY.
PRELIMINARY POINT TEMPS/POPS
PDT 44 72 42 68 / 0 0 10 10
ALW 49 74 47 70 / 0 0 10 10
PSC 40 74 42 70 / 0 0 10 20
YKM 42 71 44 67 / 0 0 30 40
HRI 41 72 42 70 / 0 0 10 20
ELN 38 67 40 66 / 0 0 40 30
RDM 35 72 35 62 / 0 0 30 30
LGD 42 74 43 75 / 0 0 10 10
GCD 40 76 44 75 / 0 0 10 10
DLS 46 67 47 66 / 0 0 40 40
PDT WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
SHORT TERM...95
LONG TERM....99
AVIATION...82
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