Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 191230
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
530 AM PDT TUE SEP 19 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-12 MPH.       SW 20-26 MPH.
TRANSPORT WINDS               SW 13-19 MPH.       W 24-30 MPH.
MIXING HEIGHT                 3000 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR WED SEP 20        GOOD.

VENTILATION INDEX (CATEGORY)  503 (FAIR).         1050 (GOOD).
OUTLOOK FOR WED SEP 20        636 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-19 MPH.        SW 12-18 MPH.
TRANSPORT WINDS               SW 5-19 MPH.        W 25-32 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR WED SEP 20        FAIR.

VENTILATION INDEX (CATEGORY)  207 (POOR).         1044 (GOOD).
OUTLOOK FOR WED SEP 20        452 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-6 MPH.         W 14-16 MPH.
TRANSPORT WINDS               S 6-8 MPH.          W 17-24 MPH.
MIXING HEIGHT                 4500 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED SEP 20        FAIR.

VENTILATION INDEX (CATEGORY)  159 (POOR).         793 (GOOD).
OUTLOOK FOR WED SEP 20        635 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      762 (GOOD)
ELLENSBURG   1046 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA        990 (GOOD)
BEND         1050 (GOOD)
PRINEVILLE   1050 (GOOD)
ENTERPRISE    846 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY     1050 (GOOD)
LA GRANDE     996 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM      1050 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND      1050 (GOOD)
SENECA       1050 (GOOD)
THE DALLES   1050 (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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