944
AUUS46 KPDT 261153
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
453 AM PDT FRI JUL 26 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         N 4-7 MPH.
TRANSPORT WINDS               SW 3-6 MPH.         NW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT JUL 27        FAIR.
OUTLOOK FOR SUN JUL 28        GOOD.

VENTILATION INDEX (CATEGORY)  39 (POOR).          229 (POOR).
OUTLOOK FOR SAT JUL 27        453 (FAIR).
OUTLOOK FOR SUN JUL 28        801 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-4 MPH.         SE 3-7 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         SW 2-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT JUL 27        POOR.
OUTLOOK FOR SUN JUL 28        FAIR.

VENTILATION INDEX (CATEGORY)  59 (POOR).          135 (POOR).
OUTLOOK FOR SAT JUL 27        274 (POOR).
OUTLOOK FOR SUN JUL 28        360 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 1-3 MPH.          N 4-7 MPH.
TRANSPORT WINDS               N 3-5 MPH.          W 8-11 MPH.
MIXING HEIGHT                 4000 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT JUL 27        GOOD.
OUTLOOK FOR SUN JUL 28        GOOD.

VENTILATION INDEX (CATEGORY)  58 (POOR).          301 (FAIR).
OUTLOOK FOR SAT JUL 27        530 (FAIR).
OUTLOOK FOR SUN JUL 28        629 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-6 MPH.          NW 6-8 MPH.
TRANSPORT WINDS               S 5-9 MPH.          NW 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT JUL 27        FAIR.
OUTLOOK FOR SUN JUL 28        GOOD.

VENTILATION INDEX (CATEGORY)  46 (POOR).          265 (POOR).
OUTLOOK FOR SAT JUL 27        447 (FAIR).
OUTLOOK FOR SUN JUL 28        782 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      378 (FAIR)
ELLENSBURG    225 (POOR)
GOLDENDALE    209 (POOR)
TRI-CITIES    187 (POOR)
WALLA WALLA   213 (POOR)
YAKIMA        176 (POOR)
BEND          377 (FAIR)
PRINEVILLE    335 (FAIR)
ENTERPRISE    446 (FAIR)
HERMISTON     177 (POOR)
JOHN DAY      709 (GOOD)
LA GRANDE     352 (FAIR)
MADRAS        289 (POOR)
MEACHAM       236 (POOR)
PENDLETON     272 (POOR)
REDMOND       337 (FAIR)
SENECA       1039 (GOOD)
THE DALLES     98 (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.
$$