029
AUUS46 KPDT 141225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE JUL 14 2026

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-8 MPH.          NE 3-7 MPH.
TRANSPORT WINDS               SW 6-11 MPH.        SE 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED JUL 15        POOR.
OUTLOOK FOR THU JUL 16        GOOD.

VENTILATION INDEX (CATEGORY)  55 (POOR).          191 (POOR).
OUTLOOK FOR WED JUL 15        398 (FAIR).
OUTLOOK FOR THU JUL 16        408 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 1-5 MPH.          SE 5-10 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         S 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JUL 15        GOOD.
OUTLOOK FOR THU JUL 16        FAIR.

VENTILATION INDEX (CATEGORY)  35 (POOR).          355 (FAIR).
OUTLOOK FOR WED JUL 15        345 (FAIR).
OUTLOOK FOR THU JUL 16        321 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 1-3 MPH.          SE 1-4 MPH.
TRANSPORT WINDS               S 7-9 MPH.          SW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED JUL 15        GOOD.
OUTLOOK FOR THU JUL 16        GOOD.

VENTILATION INDEX (CATEGORY)  56 (POOR).          237 (POOR).
OUTLOOK FOR WED JUL 15        527 (FAIR).
OUTLOOK FOR THU JUL 16        490 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-8 MPH.          NE 4-8 MPH.
TRANSPORT WINDS               S 7-12 MPH.         NW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED JUL 15        FAIR.
OUTLOOK FOR THU JUL 16        GOOD.

VENTILATION INDEX (CATEGORY)  71 (POOR).          146 (POOR).
OUTLOOK FOR WED JUL 15        484 (FAIR).
OUTLOOK FOR THU JUL 16        435 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      393 (FAIR)
ELLENSBURG    612 (GOOD)
GOLDENDALE    343 (FAIR)
TRI-CITIES    189 (POOR)
WALLA WALLA   228 (POOR)
YAKIMA        460 (FAIR)
BEND          460 (FAIR)
PRINEVILLE    385 (FAIR)
ENTERPRISE    150 (POOR)
HERMISTON     167 (POOR)
JOHN DAY      128 (POOR)
LA GRANDE     243 (POOR)
MADRAS        313 (FAIR)
MEACHAM       137 (POOR)
PENDLETON      26 (POOR)
REDMOND       447 (FAIR)
SENECA        270 (POOR)
THE DALLES    336 (FAIR)

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.
$$