Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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792
AUUS46 KPDT 211348
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
547 AM PST SAT JAN 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                 S 2-5 MPH.          E 2-5 MPH.
TRANSPORT WINDS               S 2-5 MPH.          E 2-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN JAN 22        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          35 (POOR).
OUTLOOK FOR SUN JAN 22        141 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 1-3 MPH.          E 2-3 MPH.
TRANSPORT WINDS               W 1-4 MPH.          E 2-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN JAN 22        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR SUN JAN 22        33 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-10 MPH.         S 10-20 MPH.
TRANSPORT WINDS               S 6-15 MPH.         S 12-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN JAN 22        GOOD.

VENTILATION INDEX (CATEGORY)  32 (POOR).          342 (FAIR).
OUTLOOK FOR SUN JAN 22        580 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      116 (POOR)
ELLENSBURG     76 (POOR)
GOLDENDALE     33 (POOR)
TRI-CITIES     25 (POOR)
WALLA WALLA    42 (POOR)
YAKIMA         25 (POOR)
BEND          729 (GOOD)
PRINEVILLE    440 (FAIR)
ENTERPRISE    225 (POOR)
HERMISTON      25 (POOR)
JOHN DAY      300 (POOR)
LA GRANDE     212 (POOR)
MADRAS        320 (FAIR)
MEACHAM       222 (POOR)
PENDLETON      75 (POOR)
REDMOND       361 (FAIR)
SENECA        317 (FAIR)
THE DALLES     47 (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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