874
AUUS46 KPDT 151225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN JUN 15 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        W 5-9 MPH.
TRANSPORT WINDS               SW 7-13 MPH.        W 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON JUN 16        FAIR.
OUTLOOK FOR TUE JUN 17        GOOD.

VENTILATION INDEX (CATEGORY)  101 (POOR).         294 (POOR).
OUTLOOK FOR MON JUN 16        391 (FAIR).
OUTLOOK FOR TUE JUN 17        754 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          SE 3-6 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        SW 5-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR MON JUN 16        FAIR.
OUTLOOK FOR TUE JUN 17        FAIR.

VENTILATION INDEX (CATEGORY)  80 (POOR).          267 (POOR).
OUTLOOK FOR MON JUN 16        460 (FAIR).
OUTLOOK FOR TUE JUN 17        380 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         NW 8-11 MPH.
TRANSPORT WINDS               NW 6-10 MPH.        NW 8-11 MPH.
MIXING HEIGHT                 4000 FT MSL.        9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON JUN 16        GOOD.
OUTLOOK FOR TUE JUN 17        GOOD.

VENTILATION INDEX (CATEGORY)  126 (POOR).         460 (FAIR).
OUTLOOK FOR MON JUN 16        299 (POOR).
OUTLOOK FOR TUE JUN 17        439 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-8 MPH.          NW 6-8 MPH.
TRANSPORT WINDS               SW 6-11 MPH.        NW 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON JUN 16        FAIR.
OUTLOOK FOR TUE JUN 17        GOOD.

VENTILATION INDEX (CATEGORY)  86 (POOR).          261 (POOR).
OUTLOOK FOR MON JUN 16        312 (FAIR).
OUTLOOK FOR TUE JUN 17        618 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      341 (FAIR)
ELLENSBURG    352 (FAIR)
GOLDENDALE    419 (FAIR)
TRI-CITIES    256 (POOR)
WALLA WALLA   212 (POOR)
YAKIMA        268 (POOR)
BEND          366 (FAIR)
PRINEVILLE    405 (FAIR)
ENTERPRISE    335 (FAIR)
HERMISTON     264 (POOR)
JOHN DAY      594 (FAIR)
LA GRANDE     431 (FAIR)
MADRAS        265 (POOR)
MEACHAM       221 (POOR)
PENDLETON     292 (POOR)
REDMOND       371 (FAIR)
SENECA        612 (GOOD)
THE DALLES    408 (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.
$$