794
AUUS46 KPDT 271153
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
453 AM PDT FRI SEP 27 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-12 MPH.         NW 4-8 MPH.
TRANSPORT WINDS               SW 9-15 MPH.        W 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT SEP 28        FAIR.
OUTLOOK FOR SUN SEP 29        GOOD.

VENTILATION INDEX (CATEGORY)  43 (POOR).          246 (POOR).
OUTLOOK FOR SAT SEP 28        140 (POOR).
OUTLOOK FOR SUN SEP 29        676 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         N 3-7 MPH.
TRANSPORT WINDS               W 4-9 MPH.          NW 3-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT SEP 28        POOR.
OUTLOOK FOR SUN SEP 29        GOOD.

VENTILATION INDEX (CATEGORY)  29 (POOR).          165 (POOR).
OUTLOOK FOR SAT SEP 28        104 (POOR).
OUTLOOK FOR SUN SEP 29        562 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         N 2-5 MPH.
TRANSPORT WINDS               SW 2-6 MPH.         NW 4-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT SEP 28        GOOD.
OUTLOOK FOR SUN SEP 29        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          177 (POOR).
OUTLOOK FOR SAT SEP 28        629 (GOOD).
OUTLOOK FOR SUN SEP 29        617 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-12 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               S 7-14 MPH.         W 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT SEP 28        POOR.
OUTLOOK FOR SUN SEP 29        GOOD.

VENTILATION INDEX (CATEGORY)  43 (POOR).          222 (POOR).
OUTLOOK FOR SAT SEP 28        121 (POOR).
OUTLOOK FOR SUN SEP 29        731 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      401 (FAIR)
ELLENSBURG    447 (FAIR)
GOLDENDALE    307 (FAIR)
TRI-CITIES    216 (POOR)
WALLA WALLA   226 (POOR)
YAKIMA        167 (POOR)
BEND           78 (POOR)
PRINEVILLE    104 (POOR)
ENTERPRISE    246 (POOR)
HERMISTON     240 (POOR)
JOHN DAY      221 (POOR)
LA GRANDE     165 (POOR)
MADRAS        166 (POOR)
MEACHAM       153 (POOR)
PENDLETON     189 (POOR)
REDMOND       128 (POOR)
SENECA        299 (POOR)
THE DALLES    326 (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.
$$