381
AUUS46 KPDT 021325
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST MON NOV  2 2026

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-7 MPH.         N 4-9 MPH.
TRANSPORT WINDS               SE 4-8 MPH.         NE 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE NOV 3         POOR.
OUTLOOK FOR WED NOV 4         POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          79 (POOR).
OUTLOOK FOR TUE NOV 3         73 (POOR).
OUTLOOK FOR WED NOV 4         57 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 0-1 MPH.         E 1-4 MPH.
TRANSPORT WINDS               N 2-4 MPH.          E 3-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE NOV 3         POOR.
OUTLOOK FOR WED NOV 4         POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          61 (POOR).
OUTLOOK FOR TUE NOV 3         66 (POOR).
OUTLOOK FOR WED NOV 4         54 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 1-3 MPH.          NE 0-1 MPH.
TRANSPORT WINDS               N 3-5 MPH.          SE 5-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE NOV 3         FAIR.
OUTLOOK FOR WED NOV 4         FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          73 (POOR).
OUTLOOK FOR TUE NOV 3         230 (POOR).
OUTLOOK FOR WED NOV 4         37 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 5-11 MPH.        N 3-8 MPH.
TRANSPORT WINDS               SE 6-11 MPH.        NE 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE NOV 3         POOR.
OUTLOOK FOR WED NOV 4         POOR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          75 (POOR).
OUTLOOK FOR TUE NOV 3         46 (POOR).
OUTLOOK FOR WED NOV 4         69 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      159 (POOR)
ELLENSBURG    116 (POOR)
GOLDENDALE    137 (POOR)
TRI-CITIES     66 (POOR)
WALLA WALLA    68 (POOR)
YAKIMA         60 (POOR)
BEND          168 (POOR)
PRINEVILLE    270 (POOR)
ENTERPRISE     81 (POOR)
HERMISTON      79 (POOR)
JOHN DAY      125 (POOR)
LA GRANDE      87 (POOR)
MADRAS         88 (POOR)
MEACHAM       100 (POOR)
PENDLETON      87 (POOR)
REDMOND       217 (POOR)
SENECA        174 (POOR)
THE DALLES    137 (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.
$$