844
AUUS46 KPDT 071225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT JUN  7 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 5-10 MPH.         NW 5-9 MPH.
TRANSPORT WINDS               SW 6-11 MPH.        NW 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN JUN 8         FAIR.
OUTLOOK FOR MON JUN 9         FAIR.

VENTILATION INDEX (CATEGORY)  100 (POOR).         340 (FAIR).
OUTLOOK FOR SUN JUN 8         278 (POOR).
OUTLOOK FOR MON JUN 9         439 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-6 MPH.          SE 3-6 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         N 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN JUN 8         POOR.
OUTLOOK FOR MON JUN 9         FAIR.

VENTILATION INDEX (CATEGORY)  60 (POOR).          188 (POOR).
OUTLOOK FOR SUN JUN 8         274 (POOR).
OUTLOOK FOR MON JUN 9         348 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-3 MPH.         N 6-8 MPH.
TRANSPORT WINDS               SW 3-6 MPH.         NW 6-7 MPH.
MIXING HEIGHT                 4000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN JUN 8         GOOD.
OUTLOOK FOR MON JUN 9         GOOD.

VENTILATION INDEX (CATEGORY)  63 (POOR).          314 (FAIR).
OUTLOOK FOR SUN JUN 8         435 (FAIR).
OUTLOOK FOR MON JUN 9         248 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-12 MPH.         NW 7-10 MPH.
TRANSPORT WINDS               S 7-13 MPH.         NW 7-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN JUN 8         FAIR.
OUTLOOK FOR MON JUN 9         FAIR.

VENTILATION INDEX (CATEGORY)  118 (POOR).         325 (FAIR).
OUTLOOK FOR SUN JUN 8         262 (POOR).
OUTLOOK FOR MON JUN 9         393 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      108 (POOR)
ELLENSBURG    193 (POOR)
GOLDENDALE    116 (POOR)
TRI-CITIES    262 (POOR)
WALLA WALLA   275 (POOR)
YAKIMA        112 (POOR)
BEND          280 (POOR)
PRINEVILLE    248 (POOR)
ENTERPRISE    427 (FAIR)
HERMISTON     311 (FAIR)
JOHN DAY      365 (FAIR)
LA GRANDE     352 (FAIR)
MADRAS        201 (POOR)
MEACHAM       226 (POOR)
PENDLETON     320 (FAIR)
REDMOND       244 (POOR)
SENECA        447 (FAIR)
THE DALLES    249 (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.
$$