398
AUUS46 KPDT 191159
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
359 AM PST SUN JAN 19 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-4 MPH.         N 5-10 MPH.
TRANSPORT WINDS               NW 2-5 MPH.         N 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR MON JAN 20        POOR.
OUTLOOK FOR TUE JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          88 (POOR).
OUTLOOK FOR MON JAN 20        59 (POOR).
OUTLOOK FOR TUE JAN 21        54 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-4 MPH.         NW 3-7 MPH.
TRANSPORT WINDS               NW 2-5 MPH.         N 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR MON JAN 20        POOR.
OUTLOOK FOR TUE JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          60 (POOR).
OUTLOOK FOR MON JAN 20        36 (POOR).
OUTLOOK FOR TUE JAN 21        32 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-3 MPH.         NW 7-12 MPH.
TRANSPORT WINDS               S 2-5 MPH.          N 7-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON JAN 20        FAIR.
OUTLOOK FOR TUE JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          122 (POOR).
OUTLOOK FOR MON JAN 20        84 (POOR).
OUTLOOK FOR TUE JAN 21        167 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 1-3 MPH.          NW 4-8 MPH.
TRANSPORT WINDS               E 2-5 MPH.          N 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR MON JAN 20        POOR.
OUTLOOK FOR TUE JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          82 (POOR).
OUTLOOK FOR MON JAN 20        60 (POOR).
OUTLOOK FOR TUE JAN 21        103 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       81 (POOR)
ELLENSBURG     33 (POOR)
GOLDENDALE     89 (POOR)
TRI-CITIES    111 (POOR)
WALLA WALLA    58 (POOR)
YAKIMA         49 (POOR)
BEND           84 (POOR)
PRINEVILLE    111 (POOR)
ENTERPRISE    106 (POOR)
HERMISTON      72 (POOR)
JOHN DAY      135 (POOR)
LA GRANDE     133 (POOR)
MADRAS        102 (POOR)
MEACHAM        99 (POOR)
PENDLETON      85 (POOR)
REDMOND       102 (POOR)
SENECA        148 (POOR)
THE DALLES     99 (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:
HTTP://WWW.WRH.NOAA.GOV/PDT/GFORECAST/GINDEX.PHP?FCST=MIXHGT,VENTCAT,TRANSWIND,VENTINDX&VT=0,72

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$