Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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AUUS46 KPDT 241316
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
515 AM PST WED DEC 24 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-W 11-18 MPH.     W-NW 12-16 MPH.
TRANSPORT WINDS               SW-W 11-16 MPH.     NW 14-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR THU DEC 25        POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          301 (FAIR).
OUTLOOK FOR THU DEC 25        105 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 6-10 MPH.      W-NW 14-16 MPH.
TRANSPORT WINDS               NW 6-11 MPH.        NW 15-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU DEC 25        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          306 (FAIR).
OUTLOOK FOR THU DEC 25        86 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 15-25 MPH.        NW 13-14 MPH.
TRANSPORT WINDS               S 13-15 MPH.        NW 13-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU DEC 25        FAIR.

VENTILATION INDEX (CATEGORY)  43 (POOR).          245 (POOR).
OUTLOOK FOR THU DEC 25        252 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      307 (FAIR)
ELLENSBURG    297 (POOR)
GOLDENDALE    231 (POOR)
TRI-CITIES    163 (POOR)
WALLA WALLA   296 (POOR)
YAKIMA        290 (POOR)
BEND          525 (FAIR)
PRINEVILLE    429 (FAIR)
ENTERPRISE    188 (POOR)
HERMISTON     238 (POOR)
JOHN DAY      259 (POOR)
LA GRANDE     238 (POOR)
MADRAS        418 (FAIR)
MEACHAM       258 (POOR)
PENDLETON     444 (FAIR)
REDMOND       432 (FAIR)
SENECA        384 (FAIR)
THE DALLES    237 (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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