942
AUUS46 KPDT 161225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON JUN 16 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-9 MPH.          W 9-15 MPH.
TRANSPORT WINDS               SW 6-11 MPH.        W 9-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUN 17        GOOD.
OUTLOOK FOR WED JUN 18        GOOD.

VENTILATION INDEX (CATEGORY)  84 (POOR).          559 (FAIR).
OUTLOOK FOR TUE JUN 17        786 (GOOD).
OUTLOOK FOR WED JUN 18        913 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         W 9-12 MPH.
TRANSPORT WINDS               NW 5-7 MPH.         W 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       11000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUN 17        FAIR.
OUTLOOK FOR WED JUN 18        GOOD.

VENTILATION INDEX (CATEGORY)  72 (POOR).          647 (GOOD).
OUTLOOK FOR TUE JUN 17        391 (FAIR).
OUTLOOK FOR WED JUN 18        759 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-3 MPH.         NW 9-11 MPH.
TRANSPORT WINDS               N 3-6 MPH.          NW 9-11 MPH.
MIXING HEIGHT                 4000 FT MSL.        10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUN 17        GOOD.
OUTLOOK FOR WED JUN 18        GOOD.

VENTILATION INDEX (CATEGORY)  74 (POOR).          491 (FAIR).
OUTLOOK FOR TUE JUN 17        425 (FAIR).
OUTLOOK FOR WED JUN 18        490 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-7 MPH.          W 9-12 MPH.
TRANSPORT WINDS               S 4-8 MPH.          W 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE JUN 17        GOOD.
OUTLOOK FOR WED JUN 18        FAIR.

VENTILATION INDEX (CATEGORY)  70 (POOR).          435 (FAIR).
OUTLOOK FOR TUE JUN 17        615 (GOOD).
OUTLOOK FOR WED JUN 18        716 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      618 (GOOD)
ELLENSBURG    840 (GOOD)
GOLDENDALE    781 (GOOD)
TRI-CITIES    518 (FAIR)
WALLA WALLA   349 (FAIR)
YAKIMA        610 (GOOD)
BEND          517 (FAIR)
PRINEVILLE    686 (GOOD)
ENTERPRISE    421 (FAIR)
HERMISTON     595 (FAIR)
JOHN DAY      902 (GOOD)
LA GRANDE     486 (FAIR)
MADRAS        569 (FAIR)
MEACHAM       306 (FAIR)
PENDLETON     563 (FAIR)
REDMOND       653 (GOOD)
SENECA        792 (GOOD)
THE DALLES    814 (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.
$$