954
FXUS66 KPDT 261740
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1040 AM PDT TUE MAY 26 2026
.UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- SHOWER AND THUNDERSTORM CHANCES INCREASE THURSDAY.
- SLIGHT DRIER CONDITIONS TOMORROW.
- DRIER CONDITIONS TOWARDS THE END OF THE WEEK.
DISCUSSION
RADAR SHOWS LIGHT TO MODERATE SHOWERS CONTINUING TO POUR OUT IN
THE WALLOWAS, WHICH IS EXPECTED TO CONTINUE THROUGH THE REST OF
THE OVERNIGHT HOURS. THE ASSOCIATED TROUGH THAT BROUGHT
UNSETTLED WEATHER WILL CONTINUE TO PUSH SOUTH, LEAVING THE LOW
PRESSURE SYSTEM TO BRING WRAP-AROUND THAT WILL MOSTLY EFFECT THE
SOUTHERN PORTIONS OF THE CWA (THAT INCLUDE CENTRAL OREGON
THROUGH THE JOHN DAY HIGHLANDS) THROUGH TOMORROW AND TOMORROW
NIGHT.
WEDNESDAY WILL BECOME MOSTLY CLEARER AND DRIER THANKS TO A
BUILDING RIDGE ACROSS THE PACNW, WHICH WILL ALLOW DAY TIME
HEATING TO BUILD-UP OVER THE NEXT TWO DAYS. HIGH TEMPERATURES
WILL BUILD UP TO THE MID 80S TO LOW 90S BY THURSDAY (70-80%
CHANCE). HEATRISK WITH A VALUE OF "1" (EFFECTING THE MOST
SENSITIVE TO HEAT RISKS) WILL COVER A LARGE PORTION OF THE
REGION ON WEDNESDAY AND INCREASE TO "2" IN PARTS OF THE
WASHINGTON BASIN ON THURSDAY. LATER ON THURSDAY, THE PRECLUDED
DAYTIME HEATING BUILD-UP WITH SOME LIFTING MECHANISM FROM A
SHORTWAVE WILL BRING POTENTIAL THUNDERSTORM THREATS ACROSS THE
REGION. MODELED SKEW-T'S SHOW THE POTENTIAL FOR VALUES OF 1000
J/KG+ OF CAPE TO DEVELOP. THUNDERSTORM STRENGTH POTENTIAL WILL
BE LIMITED WITH A CAP PREVENTING STORMS FOR TAKING POTENTIAL OF
THE FULL ENERGY. IF THE CAP IS BROKEN, THEN STORMS COULD
STRENGTHEN FURTHER. WILL NEED TO KEEP AN EYE ON TRENDS AS FAR AS
SHORT TERM MODELS SUGGEST.
HEADING TOWARDS THE WEEKEND, CLUSTERS GENERALLY AGREE THAT WE
WILL HEAD TOWARDS A DRIER PATTERN WITH LIGHT TO MODERATE PRECIP
AT TIMES BUT GENERALLY LESS SO THAN TODAY AND THE NEXT FEW DAYS
WILL BE.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
VFR CONDITIONS CURRENTLY ACROSS ALL SITES, WHICH WILL STAY THE
COURSE THROUGH THE PERIOD. LIGHT SHOWERS HAVE MOVED EAST OF ALL
TERMINALS, BUT WILL RETURN TO KPDT/KRDM/KBDN/KALW/KPSC BY LATE
AFTERNOON. BREEZY 15-25KT WINDS THIS AFTERNOON FOR
KDLS/KRDM/KBDN, WITH 4-6KFT CEILINGS LIFTING EARLY WEDNESDAY
MORNING. 75
PRELIMINARY POINT TEMPS/POPS
PDT 61 45 79 51 / 20 40 0 0
ALW 63 49 81 57 / 20 30 0 10
PSC 69 47 86 55 / 10 20 0 0
YKM 71 49 88 57 / 10 0 0 0
HRI 66 46 83 54 / 10 30 0 0
ELN 65 47 83 55 / 0 0 0 0
RDM 59 38 77 44 / 20 70 10 40
LGD 55 45 79 49 / 50 60 20 20
GCD 53 39 79 45 / 90 80 30 50
DLS 70 52 86 59 / 10 10 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...75
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