863
AUUS46 KPDT 201155
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
455 AM PDT FRI SEP 20 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 7-14 MPH.        W 6-10 MPH.
TRANSPORT WINDS               SW 8-14 MPH.        NW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT SEP 21        FAIR.
OUTLOOK FOR SUN SEP 22        FAIR.

VENTILATION INDEX (CATEGORY)  77 (POOR).          362 (FAIR).
OUTLOOK FOR SAT SEP 21        193 (POOR).
OUTLOOK FOR SUN SEP 22        316 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          NW 4-7 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         NW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT SEP 21        POOR.
OUTLOOK FOR SUN SEP 22        POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          409 (FAIR).
OUTLOOK FOR SAT SEP 21        151 (POOR).
OUTLOOK FOR SUN SEP 22        225 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         NW 6-10 MPH.
TRANSPORT WINDS               W 3-6 MPH.          NW 8-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT SEP 21        FAIR.
OUTLOOK FOR SUN SEP 22        FAIR.

VENTILATION INDEX (CATEGORY)  43 (POOR).          380 (FAIR).
OUTLOOK FOR SAT SEP 21        477 (FAIR).
OUTLOOK FOR SUN SEP 22        272 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        W 6-12 MPH.
TRANSPORT WINDS               SW 9-16 MPH.        NW 8-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR SAT SEP 21        FAIR.
OUTLOOK FOR SUN SEP 22        FAIR.

VENTILATION INDEX (CATEGORY)  107 (POOR).         402 (FAIR).
OUTLOOK FOR SAT SEP 21        221 (POOR).
OUTLOOK FOR SUN SEP 22        276 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      373 (FAIR)
ELLENSBURG    499 (FAIR)
GOLDENDALE    238 (POOR)
TRI-CITIES    353 (FAIR)
WALLA WALLA   381 (FAIR)
YAKIMA        513 (FAIR)
BEND          527 (FAIR)
PRINEVILLE    442 (FAIR)
ENTERPRISE    504 (FAIR)
HERMISTON     326 (FAIR)
JOHN DAY      534 (FAIR)
LA GRANDE     414 (FAIR)
MADRAS        400 (FAIR)
MEACHAM       289 (POOR)
PENDLETON     362 (FAIR)
REDMOND       498 (FAIR)
SENECA        539 (FAIR)
THE DALLES    490 (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.
$$