Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 171221
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
417 AM PST WED DEC 17 2014

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 3-7 MPH.          VRB 3-6 MPH.
TRANSPORT WINDS               N 3-7 MPH.          VRB 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 18        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          63 (POOR).
OUTLOOK FOR THU DEC 18        87 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-6 MPH.          NE 2-5 MPH.
TRANSPORT WINDS               W 3-6 MPH.          NE 2-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 18        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          41 (POOR).
OUTLOOK FOR THU DEC 18        28 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 10-20 MPH.        S 10-20 MPH.
TRANSPORT WINDS               S 10-20 MPH.        S 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 18        POOR.

VENTILATION INDEX (CATEGORY)  29 (POOR).          126 (POOR).
OUTLOOK FOR THU DEC 18        94 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       47 (POOR)
ELLENSBURG     40 (POOR)
GOLDENDALE     48 (POOR)
TRI-CITIES     48 (POOR)
WALLA WALLA   100 (POOR)
YAKIMA         37 (POOR)
BEND          107 (POOR)
PRINEVILLE    133 (POOR)
ENTERPRISE     95 (POOR)
HERMISTON      25 (POOR)
JOHN DAY      139 (POOR)
LA GRANDE     147 (POOR)
MADRAS         28 (POOR)
MEACHAM       140 (POOR)
PENDLETON      73 (POOR)
REDMOND        50 (POOR)
SENECA        130 (POOR)
THE DALLES     53 (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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