886
AUUS46 KPDT 101325
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST MON NOV 10 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 3-10 MPH.         SW 5-9 MPH.
TRANSPORT WINDS               S 5-11 MPH.         W 10-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE NOV 11        POOR.
OUTLOOK FOR WED NOV 12        POOR.

VENTILATION INDEX (CATEGORY)  32 (POOR).          109 (POOR).
OUTLOOK FOR TUE NOV 11        52 (POOR).
OUTLOOK FOR WED NOV 12        60 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          W 3-6 MPH.
TRANSPORT WINDS               SW 3-8 MPH.         W 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE NOV 11        POOR.
OUTLOOK FOR WED NOV 12        POOR.

VENTILATION INDEX (CATEGORY)  29 (POOR).          46 (POOR).
OUTLOOK FOR TUE NOV 11        33 (POOR).
OUTLOOK FOR WED NOV 12        46 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 15-24 MPH.        S 6-8 MPH.
TRANSPORT WINDS               S 16-23 MPH.        S 10-13 MPH.
MIXING HEIGHT                 4000 FT MSL.        5000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR TUE NOV 11        FAIR.
OUTLOOK FOR WED NOV 12        GOOD.

VENTILATION INDEX (CATEGORY)  194 (POOR).         256 (POOR).
OUTLOOK FOR TUE NOV 11        256 (POOR).
OUTLOOK FOR WED NOV 12        449 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-15 MPH.         SW 4-12 MPH.
TRANSPORT WINDS               S 8-16 MPH.         SW 9-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR TUE NOV 11        POOR.
OUTLOOK FOR WED NOV 12        POOR.

VENTILATION INDEX (CATEGORY)  53 (POOR).          149 (POOR).
OUTLOOK FOR TUE NOV 11        86 (POOR).
OUTLOOK FOR WED NOV 12        92 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      313 (FAIR)
ELLENSBURG    196 (POOR)
GOLDENDALE    191 (POOR)
TRI-CITIES     86 (POOR)
WALLA WALLA   123 (POOR)
YAKIMA         43 (POOR)
BEND          225 (POOR)
PRINEVILLE    104 (POOR)
ENTERPRISE    109 (POOR)
HERMISTON      74 (POOR)
JOHN DAY      202 (POOR)
LA GRANDE     177 (POOR)
MADRAS        195 (POOR)
MEACHAM       115 (POOR)
PENDLETON      89 (POOR)
REDMOND       100 (POOR)
SENECA        231 (POOR)
THE DALLES    180 (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.
$$