Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 281100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT SAT MAR 28 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 17-27 MPH.       SW-W 20-30 MPH.
TRANSPORT WINDS               SW 17-27 MPH.       W 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR SUN MAR 29        FAIR.

VENTILATION INDEX (CATEGORY)  145 (POOR).         1050 (GOOD).
OUTLOOK FOR SUN MAR 29        544 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 8-15 MPH.        W 15-25 MPH.
TRANSPORT WINDS               NW 8-15 MPH.        NW 15-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SUN MAR 29        FAIR.

VENTILATION INDEX (CATEGORY)  75 (POOR).          977 (GOOD).
OUTLOOK FOR SUN MAR 29        384 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 10-18 MPH.       W 15-25 MPH.
TRANSPORT WINDS               W 20-30 MPH.        NW 15-25 MPH.
MIXING HEIGHT                 5000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR SUN MAR 29        FAIR.

VENTILATION INDEX (CATEGORY)  318 (FAIR).         1027 (GOOD).
OUTLOOK FOR SUN MAR 29        267 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      624 (GOOD)
ELLENSBURG   1036 (GOOD)
GOLDENDALE    626 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA        870 (GOOD)
BEND          249 (POOR)
PRINEVILLE    305 (FAIR)
ENTERPRISE    934 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY      480 (FAIR)
LA GRANDE    1050 (GOOD)
MADRAS        356 (FAIR)
MEACHAM      1037 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND       288 (POOR)
SENECA        479 (FAIR)
THE DALLES    800 (GOOD)

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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