186
AUUS46 KPDT 221240
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
440 AM PST WED JAN 22 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-3 MPH.         N 3-6 MPH.
TRANSPORT WINDS               SW 0-6 MPH.         NE 1-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU JAN 23        POOR.
OUTLOOK FOR FRI JAN 24        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR THU JAN 23        25 (POOR).
OUTLOOK FOR FRI JAN 24        61 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-3 MPH.         E 1-4 MPH.
TRANSPORT WINDS               NW 0-6 MPH.         E 1-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU JAN 23        POOR.
OUTLOOK FOR FRI JAN 24        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR THU JAN 23        25 (POOR).
OUTLOOK FOR FRI JAN 24        44 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 1-3 MPH.         W 1-4 MPH.
TRANSPORT WINDS               S 1-3 MPH.          NW 1-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU JAN 23        FAIR.
OUTLOOK FOR FRI JAN 24        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR THU JAN 23        116 (POOR).
OUTLOOK FOR FRI JAN 24        225 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-5 MPH.         N 2-5 MPH.
TRANSPORT WINDS               S 4-7 MPH.          N 1-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU JAN 23        POOR.
OUTLOOK FOR FRI JAN 24        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          26 (POOR).
OUTLOOK FOR THU JAN 23        37 (POOR).
OUTLOOK FOR FRI JAN 24        95 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       25 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     28 (POOR)
TRI-CITIES     25 (POOR)
WALLA WALLA    25 (POOR)
YAKIMA         25 (POOR)
BEND           25 (POOR)
PRINEVILLE     37 (POOR)
ENTERPRISE     33 (POOR)
HERMISTON      25 (POOR)
JOHN DAY       25 (POOR)
LA GRANDE      25 (POOR)
MADRAS         25 (POOR)
MEACHAM        25 (POOR)
PENDLETON      25 (POOR)
REDMOND        28 (POOR)
SENECA         25 (POOR)
THE DALLES     53 (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.
$$