Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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AUUS46 KPDT 151456 CCA
DDOPDT

DAILY DISPERSION OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE PENDLETON OR
529 AM PST FRI DEC 15 2017

CORRECTED TO ADD AIR STAGNATION ADVISORY HEADLINE

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
THIS MORNING...

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE-S 1-4 MPH.       SW 3-6 MPH.
TRANSPORT WINDS               SE-S 1-4 MPH.       SW 6-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT DEC 16        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          40 (POOR).
OUTLOOK FOR SAT DEC 16        124 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE-E 1-4 MPH.       S 2-6 MPH.
TRANSPORT WINDS               SE-E 1-4 MPH.       S 3-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT DEC 16        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          27 (POOR).
OUTLOOK FOR SAT DEC 16        63 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 12-20 MPH.        S 11-16 MPH.
TRANSPORT WINDS               S 9-14 MPH.         S 9-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT DEC 16        FAIR.

VENTILATION INDEX (CATEGORY)  55 (POOR).          87 (POOR).
OUTLOOK FOR SAT DEC 16        261 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      125 (POOR)
ELLENSBURG     90 (POOR)
GOLDENDALE     74 (POOR)
TRI-CITIES     26 (POOR)
WALLA WALLA    29 (POOR)
YAKIMA         25 (POOR)
BEND           64 (POOR)
PRINEVILLE     28 (POOR)
ENTERPRISE     44 (POOR)
HERMISTON      26 (POOR)
JOHN DAY       25 (POOR)
LA GRANDE      92 (POOR)
MADRAS         39 (POOR)
MEACHAM       110 (POOR)
PENDLETON      38 (POOR)
REDMOND        36 (POOR)
SENECA         25 (POOR)
THE DALLES     71 (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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