396
FXUS66 KPDT 190537
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1037 PM PDT THU JUN 18 2026
KEY MESSAGES
- MODERATE HEATRISK FRIDAY AND AGAIN MONDAY THROUGH WEDNESDAY
- FIRE WEATHER WATCHES IN EFFECT SATURDAY
DISCUSSION
HEAT AND FIRE WEATHER RISKS ARE THE MAIN COUPLE WEATHER SETUPS
GOING FORWARD THAT MAY RESULT IN IMPACTS OVER THE NEXT WEEK OR
SO ACROSS THE PDT CWA. DEEP SUBSIDENCE CONTINUES INTO FRIDAY,
KEEPING WINDS LIGHT ACROSS THE ACROSS THE REGION. 850MB
TEMPERATURES IN THE 20 TO 22C RANGE WILL PROMOTE MIXING OF HOTTER
AFTERNOON TEMPERATURES REACHING INTO THE THE MID 90S. HEATRISK
IS MOST PRONOUNCED FRIDAY AND THEN AGAIN MONDAY AND TUESDAY.
TUESDAY IS FORECAST TO BE THE HOTTEST DAY OF THE WEEK WHERE
LOWER ELEVATION COLUMBIA BASIN AREAS CAN EASILY EXCEED 100F
WITH OVERNIGHT LOWS MONDAY NIGHT AND TUESDAY NIGHT BETWEEN 65
AND 70F. HEATRISK IN THE COLUMBIA RIVER GORGE AND SURROUNDING
VALLEYS IS APPROACHING LEVEL 3 (RED) DURING THIS TIME FRAME.
AVIATION /06Z TAFS THROUGH 06Z SATURDAY/
VFR CONDITIONS ARE FORECAST FOR THE NEXT 24 HOURS. SKIES WILL
RANGE FROM MOSTLY CLEAR TO BKN MID/HIGH CLOUD. DIURNALLY AND
TERRAIN-DRIVEN WINDS ARE FORECAST THROUGH MID-AFTERNOON FRIDAY,
FOLLOWED BY BREEZY AND GUSTY WESTERLY WINDS THROUGH THE CASCADE
GAPS LATE AFTERNOON AND EVENING. THERE IS A VERY LOW (5-10
PERCENT) CHANCE OF HIGH-BASED SHOWERS AND THUNDERSTORMS
AFFECTING BDN/RDM FRIDAY AFTERNOON AND EVENING.
FIRE WEATHER
POOR TO FAIR (30 TO 60%) RH RECOVERIES OVERNIGHT INTO EARLY
FRIDAY MORNING. HIGHER CONFIDENCE IN CRITICAL FIRE WEATHER
PROBABILITIES WELL EXCEEDING 60% ACROSS OR700, OR691 AND WA690
WOULD FAVOR A FIRE WEATHER WATCH FOR SATURDAY AFTERNOON AND
EVENING. THE EASTERN COLUMBIA RIVER GORGE WILL BE AN AREA OF
ENHANCED DRY AND BREEZY WINDS FRIDAY AFTERNOON. CRITICAL
COMBINED RH AND WIND OF 25% AND 20 MPH WINDS COME IN AT ABOUT
30-40% CONFIDENCE IN THE AFTERNOON AND EVENING.
PRELIMINARY POINT TEMPS/POPS
PDT 54 91 59 84 / 0 0 0 0
ALW 59 93 64 86 / 0 0 0 0
PSC 58 95 61 91 / 0 0 0 0
YKM 60 94 59 90 / 0 0 0 0
HRI 57 94 63 86 / 0 0 0 0
ELN 55 90 57 82 / 0 0 0 0
RDM 50 91 51 83 / 0 0 0 0
LGD 52 91 55 83 / 0 0 0 0
GCD 50 94 54 86 / 0 0 0 0
DLS 63 95 63 81 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...FIRE WEATHER WATCH FROM SATURDAY MORNING THROUGH SATURDAY
EVENING FOR WAZ690.
OR...FIRE WEATHER WATCH FROM SATURDAY MORNING THROUGH SATURDAY
EVENING FOR ORZ691-700.
DISCUSSION...71
AVIATION...86
FIRE WEATHER...71
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