Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 041120
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
420 AM PDT TUE AUG 4 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SW 5-9 MPH.       SW-W 13-19 MPH.
TRANSPORT WINDS               S-SW 5-9 MPH.       SW 17-19 MPH.
MIXING HEIGHT                 NEAR SURFACE.       11000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED AUG 5         GOOD.

VENTILATION INDEX (CATEGORY)  98 (POOR).          1050 (GOOD).
OUTLOOK FOR WED AUG 5         646 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 4-8 MPH.       SW-W 8-12 MPH.
TRANSPORT WINDS               W-NW 4-8 MPH.       W 9-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       11000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED AUG 5         FAIR.

VENTILATION INDEX (CATEGORY)  64 (POOR).          781 (GOOD).
OUTLOOK FOR WED AUG 5         656 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW-N 3-4 MPH.       NW 6-10 MPH.
TRANSPORT WINDS               NW-N 3-4 MPH.       W 10-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       12500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED AUG 5         GOOD.

VENTILATION INDEX (CATEGORY)  47 (POOR).          803 (GOOD).
OUTLOOK FOR WED AUG 5         679 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      512 (FAIR)
ELLENSBURG    761 (GOOD)
GOLDENDALE    750 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA        646 (GOOD)
BEND          654 (GOOD)
PRINEVILLE    646 (GOOD)
ENTERPRISE    753 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY      806 (GOOD)
LA GRANDE     793 (GOOD)
MADRAS        704 (GOOD)
MEACHAM       866 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND       690 (GOOD)
SENECA        882 (GOOD)
THE DALLES    725 (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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