815
AUUS46 KPDT 261225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI JUN 26 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 8-20 MPH. SW 15-22 MPH.
TRANSPORT WINDS SW 9-21 MPH. W 17-24 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SAT JUN 27 GOOD.
OUTLOOK FOR SUN JUN 28 GOOD.
VENTILATION INDEX (CATEGORY) 194 (POOR). 843 (GOOD).
OUTLOOK FOR SAT JUN 27 1012 (GOOD).
OUTLOOK FOR SUN JUN 28 987 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS S 3-11 MPH. W 14-20 MPH.
TRANSPORT WINDS SW 6-13 MPH. W 18-25 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT JUN 27 FAIR.
OUTLOOK FOR SUN JUN 28 GOOD.
VENTILATION INDEX (CATEGORY) 131 (POOR). 1014 (GOOD).
OUTLOOK FOR SAT JUN 27 779 (GOOD).
OUTLOOK FOR SUN JUN 28 840 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 1-3 MPH. W 2-4 MPH.
TRANSPORT WINDS S 4-5 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUN 27 FAIR.
OUTLOOK FOR SUN JUN 28 GOOD.
VENTILATION INDEX (CATEGORY) 54 (POOR). 184 (POOR).
OUTLOOK FOR SAT JUN 27 568 (FAIR).
OUTLOOK FOR SUN JUN 28 451 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 4-14 MPH. SW 9-17 MPH.
TRANSPORT WINDS SW 5-13 MPH. W 14-20 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUN 27 GOOD.
OUTLOOK FOR SUN JUN 28 GOOD.
VENTILATION INDEX (CATEGORY) 118 (POOR). 506 (FAIR).
OUTLOOK FOR SAT JUN 27 926 (GOOD).
OUTLOOK FOR SUN JUN 28 885 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 423 (FAIR)
ELLENSBURG 633 (GOOD)
GOLDENDALE 905 (GOOD)
TRI-CITIES 1050 (GOOD)
WALLA WALLA 503 (FAIR)
YAKIMA 814 (GOOD)
BEND 922 (GOOD)
PRINEVILLE 702 (GOOD)
ENTERPRISE 201 (POOR)
HERMISTON 892 (GOOD)
JOHN DAY 412 (FAIR)
LA GRANDE 219 (POOR)
MADRAS 965 (GOOD)
MEACHAM 257 (POOR)
PENDLETON 565 (FAIR)
REDMOND 690 (GOOD)
SENECA 576 (FAIR)
THE DALLES 708 (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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