625
FXUS66 KPDT 101803
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1103 AM PDT FRI APR 10 2026
KEY MESSAGES
- CHANCES OF THUNDERSTORMS CONTINUE THROUGH SUNDAY.
- COOLING TREND WILL PROGRESS THROUGH NEXT WEEK.
- SECONDARY WET PATTERN GOING INTO MID-NEXT WEEK.
DISCUSSION
RADAR DEPICTS DRY CONDITIONS, WITH SATELLITE SHOWING AN UPPER
LEVEL LOW OFF CALIFORNIA THAT WILL CONTINUE TO PUSH EAST. BEHIND
THAT, A SECONDARY UPPER LOW WILL PUSH INLAND AROUND THE EARLY
SUNDAY MORNING TIMEFRAME. THIS WILL CONTINUE TO BRING
ACTIVE/SEMI-ACTIVE WEATHER IN THE PICTURE FOR THE NEXT SEVERAL
DAYS. SUFFICIENT CAPE WILL DEVELOP IN THE LATE FRIDAY AFTERNOON
HOURS, ALLOWING FOR THUNDERSTORM ACTIVITY TO EXPAND FRIDAY-
SATURDAY. AREAS MOSTLY CONCERNED FOR THUNDERSTORM CHANCES
(15-25%) WILL BE ALONG CENTRAL OREGON THROUGH THE WALLOWAS WITH
THE MAIN DEVELOPMENT HOURS AROUND 2-6PM.
SATURDAY BECOMES A BIT UNCERTAIN REGARDING THUNDERSTORM CHANCES.
ALTHOUGH IT LOOKS LIKE THE AERIAL COVERAGE NOW INCLUDES THE
FOOTHILLS OF THE BLUES, I'M UNCERTAIN HOW WIDESPREAD
THUNDERSTORMS WILL DEVELOP DUE TO ABUNDANT CLOUD COVERAGE OVER
THE AREA. AREAS WITH MORE BREAKS IN THE CLOUDS (OR HAVE MORE
TIME TO HEAT FROM THE SUN) WILL SEE GREATER CHANCES OF
WIDESPREAD THUNDERSTORMS TO DEVELOP. IT CAN'T BE RULED OUT THAT
SOME OF THESE STORMS CAN PRODUCE PEA TO PENNY SIZE HAIL IN THE
STRONGEST DEVELOPING CELLS WITH SOME EMBEDDED GUSTY WINDS.
BY MONDAY, THINGS BEGIN TO CALM DOWN WITH DRIER CONDITIONS
ENTERING THE PICTURE AS THE TROUGH PROGRESSES TO THE EAST WITH A
MORE ZONAL PATTERN MOVING INTO THE REGION. OUR COOLING TREND
WILL CONTINUE THROUGH MID-NEXT WEEK (75-95% CHANCE) AS A SECOND
LOW PRESSURE SYSTEM DROPS THROUGH THE GULF OF ALASKA/BRITISH
COLUMBIA AREA BY THE WEDNESDAY TIMEFRAME THAT WILL RESET
ANOTHER VALLEY RAIN/MOUNTAIN SNOW EVENT.
AVIATION /18Z TAFS THROUGH 18Z SATURDAY/
PREDOMINANTLY VFR CONDITIONS ARE ANTICIPATED FOR THE NEXT 24
HOURS. HOWEVER, CHANCES OF SUB-VFR VSBYS AND/OR CIGS IN SHOWERS
AND/OR THUNDERSTORMS INCREASE THIS AFTERNOON AND EVENING TO
30-50 PERCENT FOR BDN/RDM WITH LOWER 10-30 PERCENT CHANCES OF
SUB-VFR CONDITIONS FOR ALL OTHER SITES OVERNIGHT INTO SATURDAY
MORNING. WINDS OF 10 KTS OR LESS ARE FORECAST, THOUGH GUSTY
OUTFLOW WINDS IN THE VICINITY OF SHOWERS AND THUNDERSTORMS WILL
LIKELY (80 PERCENT CONFIDENCE) DISRUPT THE BACKGROUND WIND FIELD
SUCH THAT CONFIDENCE IN DETAILS OF THE WIND FORECAST IS LOW-
MEDIUM (30-60 PERCENT) FOR ANY GIVEN SITE.
PRELIMINARY POINT TEMPS/POPS
PDT 67 46 65 43 / 40 40 70 20
ALW 68 49 66 46 / 30 40 70 30
PSC 73 49 71 44 / 10 30 50 10
YKM 72 47 66 41 / 0 30 50 10
HRI 70 47 69 44 / 20 30 50 10
ELN 69 45 60 39 / 0 30 50 10
RDM 66 39 60 37 / 60 80 70 60
LGD 69 45 62 41 / 50 50 80 60
GCD 64 43 61 39 / 80 60 70 70
DLS 72 50 68 47 / 10 50 60 20
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...86
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page