Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 251149
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
449 AM PDT MON MAY 25 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 9-13 MPH.        SW-W 9-13 MPH.
TRANSPORT WINDS               SW 10-13 MPH.       W 7-9 MPH.
MIXING HEIGHT                 2000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR TUE MAY 26        POOR.

VENTILATION INDEX (CATEGORY)  83 (POOR).          501 (FAIR).
OUTLOOK FOR TUE MAY 26        258 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 5-11 MPH.      W 3-6 MPH.
TRANSPORT WINDS               W-NW 5-10 MPH.      W 6-8 MPH.
MIXING HEIGHT                 2000 FT MSL.        9500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE MAY 26        POOR.

VENTILATION INDEX (CATEGORY)  50 (POOR).          366 (FAIR).
OUTLOOK FOR TUE MAY 26        245 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 3-7 MPH.       W-NW 4-8 MPH.
TRANSPORT WINDS               W-NW 3-6 MPH.       W 6-8 MPH.
MIXING HEIGHT                 4000 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          338 (FAIR).
OUTLOOK FOR TUE MAY 26        242 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      384 (FAIR)
ELLENSBURG    545 (FAIR)
GOLDENDALE    294 (POOR)
TRI-CITIES    505 (FAIR)
WALLA WALLA   490 (FAIR)
YAKIMA        366 (FAIR)
BEND          396 (FAIR)
PRINEVILLE    407 (FAIR)
ENTERPRISE    487 (FAIR)
HERMISTON     514 (FAIR)
JOHN DAY      438 (FAIR)
LA GRANDE     352 (FAIR)
MADRAS        431 (FAIR)
MEACHAM       342 (FAIR)
PENDLETON     434 (FAIR)
REDMOND       391 (FAIR)
SENECA        593 (FAIR)
THE DALLES    481 (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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