102
AUUS46 KPDT 151325
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST SAT NOV 15 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 7-17 MPH.         W 5-10 MPH.
TRANSPORT WINDS               SW 8-18 MPH.        SW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR SUN NOV 16        POOR.
OUTLOOK FOR MON NOV 17        POOR.

VENTILATION INDEX (CATEGORY)  64 (POOR).          181 (POOR).
OUTLOOK FOR SUN NOV 16        31 (POOR).
OUTLOOK FOR MON NOV 17        169 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-14 MPH.        SE 3-7 MPH.
TRANSPORT WINDS               SW 7-16 MPH.        SW 3-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN NOV 16        POOR.
OUTLOOK FOR MON NOV 17        POOR.

VENTILATION INDEX (CATEGORY)  51 (POOR).          88 (POOR).
OUTLOOK FOR SUN NOV 16        33 (POOR).
OUTLOOK FOR MON NOV 17        95 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-6 MPH.          S 3-6 MPH.
TRANSPORT WINDS               S 6-8 MPH.          S 10-13 MPH.
MIXING HEIGHT                 4000 FT MSL.        4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN NOV 16        GOOD.
OUTLOOK FOR MON NOV 17        FAIR.

VENTILATION INDEX (CATEGORY)  66 (POOR).          153 (POOR).
OUTLOOK FOR SUN NOV 16        306 (FAIR).
OUTLOOK FOR MON NOV 17        246 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-19 MPH.         SW 3-10 MPH.
TRANSPORT WINDS               SW 9-20 MPH.        S 6-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR SUN NOV 16        POOR.
OUTLOOK FOR MON NOV 17        POOR.

VENTILATION INDEX (CATEGORY)  80 (POOR).          197 (POOR).
OUTLOOK FOR SUN NOV 16        45 (POOR).
OUTLOOK FOR MON NOV 17        176 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      224 (POOR)
ELLENSBURG    143 (POOR)
GOLDENDALE    140 (POOR)
TRI-CITIES    283 (POOR)
WALLA WALLA   263 (POOR)
YAKIMA         57 (POOR)
BEND          124 (POOR)
PRINEVILLE    150 (POOR)
ENTERPRISE     70 (POOR)
HERMISTON     113 (POOR)
JOHN DAY      118 (POOR)
LA GRANDE     132 (POOR)
MADRAS         76 (POOR)
MEACHAM        64 (POOR)
PENDLETON      93 (POOR)
REDMOND       122 (POOR)
SENECA        160 (POOR)
THE DALLES     66 (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.
$$