211
AUUS46 KPDT 041117
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
317 AM PST WED DEC 4 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 1-3 MPH.         N 3-6 MPH.
TRANSPORT WINDS               NE 2-4 MPH.         N 3-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 5         POOR.
OUTLOOK FOR FRI DEC 6         POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          52 (POOR).
OUTLOOK FOR THU DEC 5         37 (POOR).
OUTLOOK FOR FRI DEC 6         37 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 1-3 MPH.          SW 1-4 MPH.
TRANSPORT WINDS               W 1-3 MPH.          NE 1-3 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 5         POOR.
OUTLOOK FOR FRI DEC 6         POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          33 (POOR).
OUTLOOK FOR THU DEC 5         29 (POOR).
OUTLOOK FOR FRI DEC 6         40 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-5 MPH.         S 4-8 MPH.
TRANSPORT WINDS               S 3-6 MPH.          S 7-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 5         POOR.
OUTLOOK FOR FRI DEC 6         POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          69 (POOR).
OUTLOOK FOR THU DEC 5         65 (POOR).
OUTLOOK FOR FRI DEC 6         89 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 1-3 MPH.          N 2-4 MPH.
TRANSPORT WINDS               NE 2-5 MPH.         N 2-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 5         POOR.
OUTLOOK FOR FRI DEC 6         POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          28 (POOR).
OUTLOOK FOR THU DEC 5         27 (POOR).
OUTLOOK FOR FRI DEC 6         37 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       63 (POOR)
ELLENSBURG     49 (POOR)
GOLDENDALE     75 (POOR)
TRI-CITIES     62 (POOR)
WALLA WALLA    37 (POOR)
YAKIMA         26 (POOR)
BEND           36 (POOR)
PRINEVILLE     64 (POOR)
ENTERPRISE     25 (POOR)
HERMISTON      60 (POOR)
JOHN DAY       53 (POOR)
LA GRANDE      66 (POOR)
MADRAS         25 (POOR)
MEACHAM        25 (POOR)
PENDLETON      35 (POOR)
REDMOND        29 (POOR)
SENECA         37 (POOR)
THE DALLES    144 (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.
$$