Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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261
AUUS46 KPDT 171113
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
413 AM PDT TUE OCT 17 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 7-12 MPH.         SW 20-35 MPH.
TRANSPORT WINDS               S 10-13 MPH.        SW 25-40 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED OCT 18        GOOD.

VENTILATION INDEX (CATEGORY)  36 (POOR).          917 (GOOD).
OUTLOOK FOR WED OCT 18        703 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        SW 20-30 MPH.
TRANSPORT WINDS               W 7-12 MPH.         W 30-45 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED OCT 18        GOOD.

VENTILATION INDEX (CATEGORY)  33 (POOR).          943 (GOOD).
OUTLOOK FOR WED OCT 18        589 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 9-12 MPH.         SW 10-15 MPH.
TRANSPORT WINDS               S 10-16 MPH.        SW 22-32 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED OCT 18        GOOD.

VENTILATION INDEX (CATEGORY)  85 (POOR).          894 (GOOD).
OUTLOOK FOR WED OCT 18        608 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      519 (FAIR)
ELLENSBURG    807 (GOOD)
GOLDENDALE    470 (FAIR)
TRI-CITIES    798 (GOOD)
WALLA WALLA  1035 (GOOD)
YAKIMA        869 (GOOD)
BEND          955 (GOOD)
PRINEVILLE    985 (GOOD)
ENTERPRISE   1025 (GOOD)
HERMISTON     896 (GOOD)
JOHN DAY      788 (GOOD)
LA GRANDE     977 (GOOD)
MADRAS       1046 (GOOD)
MEACHAM      1021 (GOOD)
PENDLETON     901 (GOOD)
REDMOND      1049 (GOOD)
SENECA        732 (GOOD)
THE DALLES    456 (FAIR)

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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