Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 161329
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
529 AM PST SAT DEC 16 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 5-9 MPH.         SW 4-7 MPH.
TRANSPORT WINDS               SW 9-24 MPH.        SW 6-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR SUN DEC 17        FAIR.

VENTILATION INDEX (CATEGORY)  99 (POOR).          124 (POOR).
OUTLOOK FOR SUN DEC 17        82 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-6 MPH.          S 1-3 MPH.
TRANSPORT WINDS               W 6-10 MPH.         SW 2-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN DEC 17        POOR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          63 (POOR).
OUTLOOK FOR SUN DEC 17        45 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-6 MPH.          NW 6-8 MPH.
TRANSPORT WINDS               W 7-10 MPH.         NW 7-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN DEC 17        POOR.

VENTILATION INDEX (CATEGORY)  171 (POOR).         261 (POOR).
OUTLOOK FOR SUN DEC 17        61 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      145 (POOR)
ELLENSBURG    175 (POOR)
GOLDENDALE    137 (POOR)
TRI-CITIES     26 (POOR)
WALLA WALLA   168 (POOR)
YAKIMA         45 (POOR)
BEND          279 (POOR)
PRINEVILLE    277 (POOR)
ENTERPRISE    301 (FAIR)
HERMISTON      85 (POOR)
JOHN DAY      349 (FAIR)
LA GRANDE     292 (POOR)
MADRAS        163 (POOR)
MEACHAM       236 (POOR)
PENDLETON     217 (POOR)
REDMOND       246 (POOR)
SENECA        449 (FAIR)
THE DALLES    172 (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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