115
AUUS46 KPDT 281225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN JUN 28 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 13-25 MPH. SW 16-24 MPH.
TRANSPORT WINDS SW 15-25 MPH. W 20-26 MPH.
MIXING HEIGHT 2000 FT MSL. 7000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON JUN 29 GOOD.
OUTLOOK FOR TUE JUN 30 FAIR.
VENTILATION INDEX (CATEGORY) 305 (FAIR). 974 (GOOD).
OUTLOOK FOR MON JUN 29 685 (GOOD).
OUTLOOK FOR TUE JUN 30 638 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 6-11 MPH. NW 10-18 MPH.
TRANSPORT WINDS W 8-14 MPH. NW 17-21 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON JUN 29 FAIR.
OUTLOOK FOR TUE JUN 30 FAIR.
VENTILATION INDEX (CATEGORY) 228 (POOR). 963 (GOOD).
OUTLOOK FOR MON JUN 29 486 (FAIR).
OUTLOOK FOR TUE JUN 30 303 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 4-7 MPH. W 4-7 MPH.
TRANSPORT WINDS W 10-13 MPH. W 13-18 MPH.
MIXING HEIGHT 4000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON JUN 29 FAIR.
OUTLOOK FOR TUE JUN 30 FAIR.
VENTILATION INDEX (CATEGORY) 241 (POOR). 476 (FAIR).
OUTLOOK FOR MON JUN 29 202 (POOR).
OUTLOOK FOR TUE JUN 30 210 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 13-22 MPH. SW 15-21 MPH.
TRANSPORT WINDS SW 16-22 MPH. W 19-23 MPH.
MIXING HEIGHT 2000 FT MSL. 6000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON JUN 29 FAIR.
OUTLOOK FOR TUE JUN 30 FAIR.
VENTILATION INDEX (CATEGORY) 324 (FAIR). 827 (GOOD).
OUTLOOK FOR MON JUN 29 550 (FAIR).
OUTLOOK FOR TUE JUN 30 433 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 673 (GOOD)
ELLENSBURG 1011 (GOOD)
GOLDENDALE 1050 (GOOD)
TRI-CITIES 995 (GOOD)
WALLA WALLA 762 (GOOD)
YAKIMA 1050 (GOOD)
BEND 719 (GOOD)
PRINEVILLE 761 (GOOD)
ENTERPRISE 445 (FAIR)
HERMISTON 1004 (GOOD)
JOHN DAY 565 (FAIR)
LA GRANDE 622 (GOOD)
MADRAS 828 (GOOD)
MEACHAM 695 (GOOD)
PENDLETON 976 (GOOD)
REDMOND 821 (GOOD)
SENECA 590 (FAIR)
THE DALLES 1050 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page