544
AUUS46 KPDT 021325
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST SUN NOV  2 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 8-18 MPH.        SW 5-7 MPH.
TRANSPORT WINDS               SW 10-17 MPH.       SW 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON NOV 3         POOR.
OUTLOOK FOR TUE NOV 4         POOR.

VENTILATION INDEX (CATEGORY)  79 (POOR).          294 (POOR).
OUTLOOK FOR MON NOV 3         75 (POOR).
OUTLOOK FOR TUE NOV 4         69 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-11 MPH.         SE 2-5 MPH.
TRANSPORT WINDS               W 6-12 MPH.         W 4-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR MON NOV 3         POOR.
OUTLOOK FOR TUE NOV 4         POOR.

VENTILATION INDEX (CATEGORY)  49 (POOR).          186 (POOR).
OUTLOOK FOR MON NOV 3         73 (POOR).
OUTLOOK FOR TUE NOV 4         94 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-9 MPH.         NW 2-5 MPH.
TRANSPORT WINDS               W 8-11 MPH.         NW 4-7 MPH.
MIXING HEIGHT                 4500 FT MSL.        7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON NOV 3         POOR.
OUTLOOK FOR TUE NOV 4         FAIR.

VENTILATION INDEX (CATEGORY)  169 (POOR).         304 (FAIR).
OUTLOOK FOR MON NOV 3         211 (POOR).
OUTLOOK FOR TUE NOV 4         271 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 8-18 MPH.        W 4-9 MPH.
TRANSPORT WINDS               SW 12-18 MPH.       SW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON NOV 3         POOR.
OUTLOOK FOR TUE NOV 4         POOR.

VENTILATION INDEX (CATEGORY)  123 (POOR).         305 (FAIR).
OUTLOOK FOR MON NOV 3         78 (POOR).
OUTLOOK FOR TUE NOV 4         106 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      523 (FAIR)
ELLENSBURG    439 (FAIR)
GOLDENDALE    207 (POOR)
TRI-CITIES    244 (POOR)
WALLA WALLA   304 (FAIR)
YAKIMA        177 (POOR)
BEND          150 (POOR)
PRINEVILLE    103 (POOR)
ENTERPRISE    353 (FAIR)
HERMISTON     253 (POOR)
JOHN DAY      213 (POOR)
LA GRANDE     347 (FAIR)
MADRAS        157 (POOR)
MEACHAM       201 (POOR)
PENDLETON     303 (FAIR)
REDMOND       149 (POOR)
SENECA        215 (POOR)
THE DALLES    246 (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.
$$