658
AUUS46 KPDT 251225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU JUN 25 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 7-16 MPH. W 15-21 MPH.
TRANSPORT WINDS SW 9-16 MPH. W 17-21 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR FRI JUN 26 GOOD.
OUTLOOK FOR SAT JUN 27 GOOD.
VENTILATION INDEX (CATEGORY) 168 (POOR). 923 (GOOD).
OUTLOOK FOR FRI JUN 26 996 (GOOD).
OUTLOOK FOR SAT JUN 27 1037 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-7 MPH. W 13-19 MPH.
TRANSPORT WINDS NW 5-9 MPH. W 16-19 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR FRI JUN 26 GOOD.
OUTLOOK FOR SAT JUN 27 GOOD.
VENTILATION INDEX (CATEGORY) 63 (POOR). 812 (GOOD).
OUTLOOK FOR FRI JUN 26 1024 (GOOD).
OUTLOOK FOR SAT JUN 27 799 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SW 1-3 MPH. NW 5-7 MPH.
TRANSPORT WINDS W 4-8 MPH. W 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 10500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR FRI JUN 26 FAIR.
OUTLOOK FOR SAT JUN 27 GOOD.
VENTILATION INDEX (CATEGORY) 79 (POOR). 622 (GOOD).
OUTLOOK FOR FRI JUN 26 294 (POOR).
OUTLOOK FOR SAT JUN 27 779 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 6-15 MPH. W 11-18 MPH.
TRANSPORT WINDS SW 8-14 MPH. W 13-18 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR FRI JUN 26 GOOD.
OUTLOOK FOR SAT JUN 27 GOOD.
VENTILATION INDEX (CATEGORY) 166 (POOR). 753 (GOOD).
OUTLOOK FOR FRI JUN 26 737 (GOOD).
OUTLOOK FOR SAT JUN 27 991 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 443 (FAIR)
ELLENSBURG 712 (GOOD)
GOLDENDALE 720 (GOOD)
TRI-CITIES 950 (GOOD)
WALLA WALLA 728 (GOOD)
YAKIMA 734 (GOOD)
BEND 902 (GOOD)
PRINEVILLE 767 (GOOD)
ENTERPRISE 578 (FAIR)
HERMISTON 924 (GOOD)
JOHN DAY 974 (GOOD)
LA GRANDE 755 (GOOD)
MADRAS 841 (GOOD)
MEACHAM 569 (FAIR)
PENDLETON 874 (GOOD)
REDMOND 700 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 591 (FAIR)
METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS. BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.
THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS. A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
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