655
AUUS46 KPDT 141225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON JUL 14 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 6-12 MPH.         W 15-21 MPH.
TRANSPORT WINDS               SW 7-12 MPH.        W 18-26 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUL 15        GOOD.
OUTLOOK FOR WED JUL 16        FAIR.

VENTILATION INDEX (CATEGORY)  165 (POOR).         1017 (GOOD).
OUTLOOK FOR TUE JUL 15        834 (GOOD).
OUTLOOK FOR WED JUL 16        310 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 4-8 MPH.          NW 12-16 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        W 14-19 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUL 15        GOOD.
OUTLOOK FOR WED JUL 16        FAIR.

VENTILATION INDEX (CATEGORY)  101 (POOR).         829 (GOOD).
OUTLOOK FOR TUE JUL 15        1043 (GOOD).
OUTLOOK FOR WED JUL 16        261 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 2-4 MPH.         NW 13-13 MPH.
TRANSPORT WINDS               W 4-8 MPH.          W 18-21 MPH.
MIXING HEIGHT                 4000 FT MSL.        11500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUL 15        GOOD.
OUTLOOK FOR WED JUL 16        GOOD.

VENTILATION INDEX (CATEGORY)  125 (POOR).         1045 (GOOD).
OUTLOOK FOR TUE JUL 15        811 (GOOD).
OUTLOOK FOR WED JUL 16        257 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-13 MPH.         W 16-20 MPH.
TRANSPORT WINDS               SW 8-14 MPH.        W 21-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUL 15        GOOD.
OUTLOOK FOR WED JUL 16        FAIR.

VENTILATION INDEX (CATEGORY)  180 (POOR).         1043 (GOOD).
OUTLOOK FOR TUE JUL 15        623 (GOOD).
OUTLOOK FOR WED JUL 16        294 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      965 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE    818 (GOOD)
TRI-CITIES   1014 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA        714 (GOOD)
BEND          750 (GOOD)
PRINEVILLE    822 (GOOD)
ENTERPRISE   1050 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY     1050 (GOOD)
LA GRANDE    1050 (GOOD)
MADRAS        792 (GOOD)
MEACHAM      1015 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND       828 (GOOD)
SENECA       1050 (GOOD)
THE DALLES    985 (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.
$$