928
AUUS46 KPDT 241225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED JUN 24 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 2-6 MPH. NW 5-9 MPH.
TRANSPORT WINDS SW 3-7 MPH. NW 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 11500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU JUN 25 GOOD.
OUTLOOK FOR FRI JUN 26 GOOD.
VENTILATION INDEX (CATEGORY) 47 (POOR). 551 (FAIR).
OUTLOOK FOR THU JUN 25 1038 (GOOD).
OUTLOOK FOR FRI JUN 26 792 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. W 4-8 MPH.
TRANSPORT WINDS NW 5-9 MPH. W 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 12500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU JUN 25 GOOD.
OUTLOOK FOR FRI JUN 26 GOOD.
VENTILATION INDEX (CATEGORY) 67 (POOR). 545 (FAIR).
OUTLOOK FOR THU JUN 25 748 (GOOD).
OUTLOOK FOR FRI JUN 26 893 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 1-3 MPH. NW 9-12 MPH.
TRANSPORT WINDS N 4-7 MPH. NW 10-13 MPH.
MIXING HEIGHT NEAR SURFACE. 11500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU JUN 25 GOOD.
OUTLOOK FOR FRI JUN 26 FAIR.
VENTILATION INDEX (CATEGORY) 98 (POOR). 708 (GOOD).
OUTLOOK FOR THU JUN 25 732 (GOOD).
OUTLOOK FOR FRI JUN 26 186 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. NW 6-10 MPH.
TRANSPORT WINDS S 4-6 MPH. NW 7-11 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUN 25 GOOD.
OUTLOOK FOR FRI JUN 26 GOOD.
VENTILATION INDEX (CATEGORY) 46 (POOR). 577 (FAIR).
OUTLOOK FOR THU JUN 25 917 (GOOD).
OUTLOOK FOR FRI JUN 26 491 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 612 (GOOD)
ELLENSBURG 773 (GOOD)
GOLDENDALE 1050 (GOOD)
TRI-CITIES 445 (FAIR)
WALLA WALLA 412 (FAIR)
YAKIMA 606 (GOOD)
BEND 675 (GOOD)
PRINEVILLE 923 (GOOD)
ENTERPRISE 618 (GOOD)
HERMISTON 487 (FAIR)
JOHN DAY 860 (GOOD)
LA GRANDE 723 (GOOD)
MADRAS 692 (GOOD)
MEACHAM 603 (GOOD)
PENDLETON 682 (GOOD)
REDMOND 868 (GOOD)
SENECA 957 (GOOD)
THE DALLES 796 (GOOD)
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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