Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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585
AUUS46 KPDT 211326
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
526 AM PST TUE FEB 21 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N-NW 4-9 MPH.       W 9-14 MPH.
TRANSPORT WINDS               N-NW 4-9 MPH.       W-NW 8-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED FEB 22        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          111 (POOR).
OUTLOOK FOR WED FEB 22        593 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 3-8 MPH.       W 7-10 MPH.
TRANSPORT WINDS               W-NW 3-8 MPH.       NW 7-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED FEB 22        FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          99 (POOR).
OUTLOOK FOR WED FEB 22        346 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 9-14 MPH.         SW 20-33 MPH.
TRANSPORT WINDS               S 9-14 MPH.         SW 19-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED FEB 22        FAIR.

VENTILATION INDEX (CATEGORY)  95 (POOR).          357 (FAIR).
OUTLOOK FOR WED FEB 22        526 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      106 (POOR)
ELLENSBURG     68 (POOR)
GOLDENDALE     77 (POOR)
TRI-CITIES     94 (POOR)
WALLA WALLA   149 (POOR)
YAKIMA         78 (POOR)
BEND          929 (GOOD)
PRINEVILLE   1035 (GOOD)
ENTERPRISE    557 (FAIR)
HERMISTON      63 (POOR)
JOHN DAY      747 (GOOD)
LA GRANDE     419 (FAIR)
MADRAS        864 (GOOD)
MEACHAM       668 (GOOD)
PENDLETON     222 (POOR)
REDMOND      1014 (GOOD)
SENECA        762 (GOOD)
THE DALLES    150 (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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