888
AUUS46 KPDT 031225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE JUN  3 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 8-11 MPH.
TRANSPORT WINDS               SW 5-9 MPH.         W 8-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JUN 4         FAIR.
OUTLOOK FOR THU JUN 5         FAIR.

VENTILATION INDEX (CATEGORY)  103 (POOR).         585 (FAIR).
OUTLOOK FOR WED JUN 4         365 (FAIR).
OUTLOOK FOR THU JUN 5         227 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 4-8 MPH.          NW 6-8 MPH.
TRANSPORT WINDS               NW 6-11 MPH.        NW 8-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JUN 4         POOR.
OUTLOOK FOR THU JUN 5         POOR.

VENTILATION INDEX (CATEGORY)  114 (POOR).         571 (FAIR).
OUTLOOK FOR WED JUN 4         207 (POOR).
OUTLOOK FOR THU JUN 5         196 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 1-3 MPH.          NW 10-14 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         NW 10-14 MPH.
MIXING HEIGHT                 4000 FT MSL.        12000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED JUN 4         GOOD.
OUTLOOK FOR THU JUN 5         GOOD.

VENTILATION INDEX (CATEGORY)  138 (POOR).         858 (GOOD).
OUTLOOK FOR WED JUN 4         406 (FAIR).
OUTLOOK FOR THU JUN 5         542 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-9 MPH.          NW 8-11 MPH.
TRANSPORT WINDS               SW 6-10 MPH.        W 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JUN 4         FAIR.
OUTLOOK FOR THU JUN 5         FAIR.

VENTILATION INDEX (CATEGORY)  118 (POOR).         609 (GOOD).
OUTLOOK FOR WED JUN 4         279 (POOR).
OUTLOOK FOR THU JUN 5         344 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      768 (GOOD)
ELLENSBURG    714 (GOOD)
GOLDENDALE    692 (GOOD)
TRI-CITIES    569 (FAIR)
WALLA WALLA   490 (FAIR)
YAKIMA        719 (GOOD)
BEND          792 (GOOD)
PRINEVILLE    724 (GOOD)
ENTERPRISE    854 (GOOD)
HERMISTON     525 (FAIR)
JOHN DAY      790 (GOOD)
LA GRANDE     846 (GOOD)
MADRAS        728 (GOOD)
MEACHAM       543 (FAIR)
PENDLETON     603 (GOOD)
REDMOND       745 (GOOD)
SENECA        786 (GOOD)
THE DALLES    817 (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.
$$