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038
AUUS46 KPDT 201100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT SUN APR 20 2014

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        SW 6-12 MPH.
TRANSPORT WINDS               SW 6-12 MPH.        SW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON APR 21        POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          402 (FAIR).
OUTLOOK FOR MON APR 21        101 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         S 5-10 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         SW 12-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON APR 21        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          298 (POOR).
OUTLOOK FOR MON APR 21        339 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         W 5-10 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         SW 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON APR 21        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          312 (FAIR).
OUTLOOK FOR MON APR 21        162 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      316 (FAIR)
ELLENSBURG    280 (POOR)
GOLDENDALE    204 (POOR)
TRI-CITIES    472 (FAIR)
WALLA WALLA   276 (POOR)
YAKIMA        222 (POOR)
BEND          545 (FAIR)
ENTERPRISE    380 (FAIR)
HERMISTON     337 (FAIR)
JOHN DAY      456 (FAIR)
LA GRANDE     313 (FAIR)
MADRAS        439 (FAIR)
MEACHAM       372 (FAIR)
PENDLETON     258 (POOR)
REDMOND       430 (FAIR)
SENECA        442 (FAIR)
THE DALLES    152 (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/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$





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