404
AUUS46 KPDT 101222
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
522 AM PDT FRI MAY 10 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 3-7 MPH.         N 4-8 MPH.
TRANSPORT WINDS               S 3-6 MPH.          E 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT MAY 11        FAIR.
OUTLOOK FOR SUN MAY 12        GOOD.

VENTILATION INDEX (CATEGORY)  30 (POOR).          160 (POOR).
OUTLOOK FOR SAT MAY 11        388 (FAIR).
OUTLOOK FOR SUN MAY 12        885 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         SE 6-8 MPH.
TRANSPORT WINDS               NW 5-9 MPH.         E 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT MAY 11        FAIR.
OUTLOOK FOR SUN MAY 12        FAIR.

VENTILATION INDEX (CATEGORY)  53 (POOR).          403 (FAIR).
OUTLOOK FOR SAT MAY 11        321 (FAIR).
OUTLOOK FOR SUN MAY 12        483 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 1-4 MPH.         SE 3-6 MPH.
TRANSPORT WINDS               SE 2-5 MPH.         S 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT MAY 11        GOOD.
OUTLOOK FOR SUN MAY 12        GOOD.

VENTILATION INDEX (CATEGORY)  32 (POOR).          260 (POOR).
OUTLOOK FOR SAT MAY 11        357 (FAIR).
OUTLOOK FOR SUN MAY 12        729 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-8 MPH.         N 1-6 MPH.
TRANSPORT WINDS               SE 6-11 MPH.        NW 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT MAY 11        FAIR.
OUTLOOK FOR SUN MAY 12        GOOD.

VENTILATION INDEX (CATEGORY)  38 (POOR).          134 (POOR).
OUTLOOK FOR SAT MAY 11        366 (FAIR).
OUTLOOK FOR SUN MAY 12        896 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      437 (FAIR)
ELLENSBURG    399 (FAIR)
GOLDENDALE    367 (FAIR)
TRI-CITIES    211 (POOR)
WALLA WALLA    74 (POOR)
YAKIMA        489 (FAIR)
BEND          405 (FAIR)
PRINEVILLE    308 (FAIR)
ENTERPRISE    227 (POOR)
HERMISTON     167 (POOR)
JOHN DAY      338 (FAIR)
LA GRANDE     255 (POOR)
MADRAS        267 (POOR)
MEACHAM        94 (POOR)
PENDLETON     177 (POOR)
REDMOND       322 (FAIR)
SENECA        403 (FAIR)
THE DALLES    265 (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.
$$