Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 241155
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
455 AM PDT WED MAY 24 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-SW 10-22 MPH.     W 14-23 MPH.
TRANSPORT WINDS               W 17-27 MPH.        W 16-24 MPH.
MIXING HEIGHT                 2500 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU MAY 25        POOR.

VENTILATION INDEX (CATEGORY)  425 (FAIR).         1021 (GOOD).
OUTLOOK FOR THU MAY 25        130 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 10-16 MPH.     NW 13-18 MPH.
TRANSPORT WINDS               NW 16-23 MPH.       NW 17-22 MPH.
MIXING HEIGHT                 2000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU MAY 25        FAIR.

VENTILATION INDEX (CATEGORY)  333 (FAIR).         1036 (GOOD).
OUTLOOK FOR THU MAY 25        355 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N-NW 9-15 MPH.      NW 13-18 MPH.
TRANSPORT WINDS               W-NW 12-16 MPH.     W-NW 19-23 MPH.
MIXING HEIGHT                 4500 FT MSL.        10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 25        FAIR.

VENTILATION INDEX (CATEGORY)  290 (POOR).         956 (GOOD).
OUTLOOK FOR THU MAY 25        261 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      895 (GOOD)
ELLENSBURG   1024 (GOOD)
GOLDENDALE    694 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA       1050 (GOOD)
BEND          902 (GOOD)
PRINEVILLE    893 (GOOD)
ENTERPRISE   1050 (GOOD)
HERMISTON     987 (GOOD)
JOHN DAY     1050 (GOOD)
LA GRANDE    1024 (GOOD)
MADRAS        815 (GOOD)
MEACHAM       896 (GOOD)
PENDLETON     936 (GOOD)
REDMOND       915 (GOOD)
SENECA       1050 (GOOD)
THE DALLES    842 (GOOD)

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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