Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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762
AUUS46 KPDT 291118
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
418 AM PDT FRI APR 29 2016

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW-W 10-17 MPH.     SW 16-19 MPH.
TRANSPORT WINDS               SW-W 10-17 MPH.     W 13-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SAT APR 30        FAIR.

VENTILATION INDEX (CATEGORY)  189 (POOR).         819 (GOOD).
OUTLOOK FOR SAT APR 30        310 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 5-9 MPH.       W 12-18 MPH.
TRANSPORT WINDS               W-NW 5-9 MPH.       NW 15-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT APR 30        FAIR.

VENTILATION INDEX (CATEGORY)  102 (POOR).         797 (GOOD).
OUTLOOK FOR SAT APR 30        586 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-10 MPH.        NW 10-16 MPH.
TRANSPORT WINDS               NW 6-9 MPH.         W 15-17 MPH.
MIXING HEIGHT                 4000 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT APR 30        FAIR.

VENTILATION INDEX (CATEGORY)  142 (POOR).         684 (GOOD).
OUTLOOK FOR SAT APR 30        473 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      492 (FAIR)
ELLENSBURG    725 (GOOD)
GOLDENDALE    661 (GOOD)
TRI-CITIES    748 (GOOD)
WALLA WALLA   832 (GOOD)
YAKIMA        895 (GOOD)
BEND          915 (GOOD)
PRINEVILLE    892 (GOOD)
ENTERPRISE    726 (GOOD)
HERMISTON     760 (GOOD)
JOHN DAY      616 (GOOD)
LA GRANDE     739 (GOOD)
MADRAS        918 (GOOD)
MEACHAM       674 (GOOD)
PENDLETON     945 (GOOD)
REDMOND       939 (GOOD)
SENECA        569 (FAIR)
THE DALLES    925 (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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