Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 181200
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST THU DEC 18 2014

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 0-4 MPH.         SE 5-10 MPH.
TRANSPORT WINDS               SE 0-4 MPH.         S 7-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI DEC 19        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          73 (POOR).
OUTLOOK FOR FRI DEC 19        510 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 0-4 MPH.         SE 5-10 MPH.
TRANSPORT WINDS               SE 0-4 MPH.         SE 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI DEC 19        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR FRI DEC 19        354 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 10-18 MPH.        S 12-20 MPH.
TRANSPORT WINDS               S 10-18 MPH.        S 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI DEC 19        POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          73 (POOR).
OUTLOOK FOR FRI DEC 19        56 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       25 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     25 (POOR)
TRI-CITIES     25 (POOR)
WALLA WALLA   150 (POOR)
YAKIMA         25 (POOR)
BEND           39 (POOR)
PRINEVILLE     96 (POOR)
ENTERPRISE     27 (POOR)
HERMISTON      25 (POOR)
JOHN DAY       95 (POOR)
LA GRANDE      79 (POOR)
MADRAS         25 (POOR)
MEACHAM       147 (POOR)
PENDLETON     168 (POOR)
REDMOND        25 (POOR)
SENECA         65 (POOR)
THE DALLES     25 (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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