947
AUUS46 KPDT 191132
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
432 AM PDT THU SEP 19 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        SW 10-15 MPH.
TRANSPORT WINDS               SW 5-10 MPH.        W 12-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI SEP 20        FAIR.
OUTLOOK FOR SAT SEP 21        POOR.

VENTILATION INDEX (CATEGORY)  39 (POOR).          495 (FAIR).
OUTLOOK FOR FRI SEP 20        391 (FAIR).
OUTLOOK FOR SAT SEP 21        154 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               NW 3-6 MPH.         NW 7-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI SEP 20        FAIR.
OUTLOOK FOR SAT SEP 21        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          193 (POOR).
OUTLOOK FOR FRI SEP 20        269 (POOR).
OUTLOOK FOR SAT SEP 21        132 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-4 MPH.          NW 4-8 MPH.
TRANSPORT WINDS               S 2-4 MPH.          W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI SEP 20        FAIR.
OUTLOOK FOR SAT SEP 21        FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          611 (GOOD).
OUTLOOK FOR FRI SEP 20        424 (FAIR).
OUTLOOK FOR SAT SEP 21        336 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        SW 7-14 MPH.
TRANSPORT WINDS               SW 5-10 MPH.        W 12-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI SEP 20        FAIR.
OUTLOOK FOR SAT SEP 21        POOR.

VENTILATION INDEX (CATEGORY)  46 (POOR).          482 (FAIR).
OUTLOOK FOR FRI SEP 20        431 (FAIR).
OUTLOOK FOR SAT SEP 21        180 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      357 (FAIR)
ELLENSBURG    444 (FAIR)
GOLDENDALE    345 (FAIR)
TRI-CITIES    448 (FAIR)
WALLA WALLA   477 (FAIR)
YAKIMA        184 (POOR)
BEND          386 (FAIR)
PRINEVILLE    415 (FAIR)
ENTERPRISE    502 (FAIR)
HERMISTON     530 (FAIR)
JOHN DAY      535 (FAIR)
LA GRANDE     625 (GOOD)
MADRAS        365 (FAIR)
MEACHAM       478 (FAIR)
PENDLETON     417 (FAIR)
REDMOND       403 (FAIR)
SENECA        452 (FAIR)
THE DALLES    517 (FAIR)

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.
$$