Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 211200
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST SUN DEC 21 2014

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 20-30 MPH.       SW-W 25-35 MPH.
TRANSPORT WINDS               SW 20-30 MPH.       SW 25-35 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON DEC 22        FAIR.

VENTILATION INDEX (CATEGORY)  62 (POOR).          517 (FAIR).
OUTLOOK FOR MON DEC 22        172 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 3-7 MPH.         W 25-35 MPH.
TRANSPORT WINDS               SW 3-7 MPH.         W 25-35 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON DEC 22        POOR.

VENTILATION INDEX (CATEGORY)  31 (POOR).          548 (FAIR).
OUTLOOK FOR MON DEC 22        70 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 12-22 MPH.       NW 10-20 MPH.
TRANSPORT WINDS               NW 12-22 MPH.       NW 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON DEC 22        FAIR.

VENTILATION INDEX (CATEGORY)  37 (POOR).          109 (POOR).
OUTLOOK FOR MON DEC 22        189 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      182 (POOR)
ELLENSBURG    428 (FAIR)
GOLDENDALE    443 (FAIR)
TRI-CITIES    759 (GOOD)
WALLA WALLA   426 (FAIR)
YAKIMA        413 (FAIR)
BEND          100 (POOR)
PRINEVILLE    165 (POOR)
ENTERPRISE     93 (POOR)
HERMISTON     501 (FAIR)
JOHN DAY      106 (POOR)
LA GRANDE     126 (POOR)
MADRAS        292 (POOR)
MEACHAM       307 (FAIR)
PENDLETON     592 (FAIR)
REDMOND       168 (POOR)
SENECA         66 (POOR)
THE DALLES    414 (FAIR)

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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