Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 270942
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
242 AM PDT TUE JUN 27 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW-W 12-18 MPH.     SW-W 12-20 MPH.
TRANSPORT WINDS               SW-W 12-18 MPH.     W 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR WED JUN 28        GOOD.

VENTILATION INDEX (CATEGORY)  234 (POOR).         581 (FAIR).
OUTLOOK FOR WED JUN 28        846 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 7-13 MPH.        NW 5-10 MPH.
TRANSPORT WINDS               NW 7-13 MPH.        W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JUN 28        GOOD.

VENTILATION INDEX (CATEGORY)  76 (POOR).          336 (FAIR).
OUTLOOK FOR WED JUN 28        773 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         W 5-10 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         W 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED JUN 28        GOOD.

VENTILATION INDEX (CATEGORY)  61 (POOR).          371 (FAIR).
OUTLOOK FOR WED JUN 28        605 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      286 (POOR)
ELLENSBURG    405 (FAIR)
GOLDENDALE    282 (POOR)
TRI-CITIES    522 (FAIR)
WALLA WALLA   586 (FAIR)
YAKIMA        365 (FAIR)
BEND          491 (FAIR)
PRINEVILLE    488 (FAIR)
ENTERPRISE    517 (FAIR)
HERMISTON     549 (FAIR)
JOHN DAY      533 (FAIR)
LA GRANDE     391 (FAIR)
MADRAS        412 (FAIR)
MEACHAM       431 (FAIR)
PENDLETON     593 (FAIR)
REDMOND       458 (FAIR)
SENECA        641 (GOOD)
THE DALLES    472 (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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