601
FXUS66 KPDT 020523
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1023 PM PDT THU OCT 1 2026
.UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- AREA OF HIGH PRESSURE BUILDS OVER THE PACIFIC NORTHWEST, WITH
DRY AND CALM CONDITIONS PREVAILING THROUGH AT LEAST THE NEXT
COUPLE OF DAYS.
- TEMPERATURES CONTINUE TO BUILD AND INCREASE UP TO 15-25
DEGREES ABOVE NORMAL HIGH TEMPERATURES BY EARLY NEXT WEEK.
- LIGHT WINDS CONTINUE WITH DIURNALLY DRIVEN SPEEDS THROUGH
PEAK HEATING HOURS.
DISCUSSION
NOT MUCH ACTIVITY DISPLAYING ON RADAR OR SATELLITE CURRENTLY.
SYNOPTIC FLOW FAVORS A DRY AND WARM PATTERN WITH A RIDGE
CURRENTLY PUSHING INTO THE AREA. WILL SEE THE RIDGE CONTINUE TO
AMPLIFY THROUGH THE WEEKEND AND EARLY NEXT WEEK OVER THE PACIFIC
NORTHWEST. AS THE RIDGE CONTINUES TO BUILD, HIGH TEMPERATURES
WILL DRIVE UP TO 15-25 DEGREES ABOVE NORMAL ON MONDAY (70-90%
CHANCE) WITH HIGHS IN THE MID TO UPPER 80S IN THE LOWER
ELEVATION AREAS. THERE IS A 50-70% CHANCE WE CAN SEE THE RIDGE
AMPLIFY ENOUGH TO ALLOW TEMPERATURES TO REACH AT/ABOVE 90
DEGREES, ESPECIALLY IN SOME OF THE COLUMBIA BASIN AREA.
AS FAR AS RISK GOES, HEATRISK IS FAIRLY LOW WITH A CATEGORY '1',
THOUGH GUIDANCE PICKS UP ON THE POSSIBILITY THAT WE CAN SEE
AREAS OF MODERATE HEATRISK DEVELOP ON MONDAY ACROSS PARTS OF
CENTRAL OREGON (20-40% CHANCE) AND PARTS OF THE COLUMBIA BASIN
(UP TO 10% CHANCE). THOUGH THE OUTLOOK FOR WIDESPREAD MODERATE
HEATRISK APPEARS TO REMAIN SMALL GIVEN THE TIME OF YEAR AND THAT
DAYS ARE GETTING SHORTER AS WE HEAD INTO WINTER. GUIDANCE IS IN
AGREEMENT THAT TEMPERATURES WILL DROP SLIGHTLY OVER THE NEXT
DAY, THOUGH HIGHS WILL REMAIN IN THE 80S THROUGH MID NEXT-WEEK.
AVIATION /06Z TAFS THROUGH 06Z SATURDAY/
VFR CONDITIONS CURRENTLY ACROSS ALL SITES, WHICH WILL STAY THE
COURSE THROUGH THE PERIOD. SKIES WILL CLEAR THROUGH FRIDAY
MORNING, WITH LIGHT WINDS OF 10KTS OR LESS EXPECTED. KDLS WILL
EXPERIENCE WINDS AROUND 10KTS THROUGH THE AFTERNOON AND EARLY
EVENING BEFORE SUBSIDING TOWARDS THE END OF THE PERIOD. 75
PRELIMINARY POINT TEMPS/POPS
PDT 47 78 47 79 / 0 0 0 0
ALW 53 79 52 81 / 0 0 0 0
PSC 47 81 49 82 / 0 0 0 0
YKM 50 79 50 79 / 0 0 0 0
HRI 48 81 50 80 / 0 0 0 0
ELN 45 75 46 75 / 0 0 0 0
RDM 42 81 41 81 / 0 0 0 0
LGD 48 81 46 82 / 0 0 0 0
GCD 47 82 47 88 / 0 0 0 0
DLS 54 83 53 83 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...75
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