433
AUUS46 KPDT 081225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON JUN  8 2026

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         SW 7-12 MPH.
TRANSPORT WINDS               S 3-7 MPH.          SW 12-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE JUN 9         GOOD.
OUTLOOK FOR WED JUN 10        GOOD.

VENTILATION INDEX (CATEGORY)  45 (POOR).          461 (FAIR).
OUTLOOK FOR TUE JUN 9         1049 (GOOD).
OUTLOOK FOR WED JUN 10        1025 (GOOD).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 0-2 MPH.          S 8-11 MPH.
TRANSPORT WINDS               NW 2-5 MPH.         S 13-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE JUN 9         GOOD.
OUTLOOK FOR WED JUN 10        FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          564 (FAIR).
OUTLOOK FOR TUE JUN 9         1050 (GOOD).
OUTLOOK FOR WED JUN 10        767 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 4-9 MPH.          S 13-18 MPH.
TRANSPORT WINDS               SE 6-11 MPH.        S 20-24 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUN 9         GOOD.
OUTLOOK FOR WED JUN 10        GOOD.

VENTILATION INDEX (CATEGORY)  179 (POOR).         1050 (GOOD).
OUTLOOK FOR TUE JUN 9         782 (GOOD).
OUTLOOK FOR WED JUN 10        587 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-7 MPH.         SW 6-11 MPH.
TRANSPORT WINDS               SE 6-11 MPH.        SW 13-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE JUN 9         GOOD.
OUTLOOK FOR WED JUN 10        GOOD.

VENTILATION INDEX (CATEGORY)  103 (POOR).         669 (GOOD).
OUTLOOK FOR TUE JUN 9         948 (GOOD).
OUTLOOK FOR WED JUN 10        926 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      683 (GOOD)
ELLENSBURG    708 (GOOD)
GOLDENDALE    228 (POOR)
TRI-CITIES    542 (FAIR)
WALLA WALLA   479 (FAIR)
YAKIMA        536 (FAIR)
BEND          859 (GOOD)
PRINEVILLE    597 (FAIR)
ENTERPRISE   1050 (GOOD)
HERMISTON     335 (FAIR)
JOHN DAY     1050 (GOOD)
LA GRANDE    1050 (GOOD)
MADRAS        585 (FAIR)
MEACHAM      1050 (GOOD)
PENDLETON     499 (FAIR)
REDMOND       738 (GOOD)
SENECA       1050 (GOOD)
THE DALLES    220 (POOR)

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.
$$