Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 261239
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
439 AM PST FRI DEC 26 2014

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-W 3-7 MPH.        SW-W 3-6 MPH.
TRANSPORT WINDS               S-W 3-7 MPH.        SW-W 5-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT DEC 27        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          86 (POOR).
OUTLOOK FOR SAT DEC 27        95 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          E-SE 2-4 MPH.
TRANSPORT WINDS               W 2-6 MPH.          E-SE 2-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT DEC 27        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          31 (POOR).
OUTLOOK FOR SAT DEC 27        114 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         NW 5-8 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         NW 8-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT DEC 27        POOR.

VENTILATION INDEX (CATEGORY)  48 (POOR).          239 (POOR).
OUTLOOK FOR SAT DEC 27        124 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       66 (POOR)
ELLENSBURG     65 (POOR)
GOLDENDALE     47 (POOR)
TRI-CITIES     51 (POOR)
WALLA WALLA   115 (POOR)
YAKIMA         26 (POOR)
BEND           58 (POOR)
PRINEVILLE     86 (POOR)
ENTERPRISE    140 (POOR)
HERMISTON      81 (POOR)
JOHN DAY      160 (POOR)
LA GRANDE     239 (POOR)
MADRAS         53 (POOR)
MEACHAM       108 (POOR)
PENDLETON     104 (POOR)
REDMOND        72 (POOR)
SENECA        227 (POOR)
THE DALLES     56 (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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