Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 261216
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
516 AM PDT WED APR 26 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 5-17 MPH.        SW 16-26 MPH.
TRANSPORT WINDS               SW 10-24 MPH.       W 22-27 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU APR 27        GOOD.

VENTILATION INDEX (CATEGORY)  251 (POOR).         1002 (GOOD).
OUTLOOK FOR THU APR 27        1046 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-12 MPH.         W 15-23 MPH.
TRANSPORT WINDS               SW 4-16 MPH.        W 18-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU APR 27        GOOD.

VENTILATION INDEX (CATEGORY)  135 (POOR).         1029 (GOOD).
OUTLOOK FOR THU APR 27        1050 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 0-5 MPH.         W 14-16 MPH.
TRANSPORT WINDS               SW 6-10 MPH.        W 11-15 MPH.
MIXING HEIGHT                 4500 FT MSL.        7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU APR 27        GOOD.

VENTILATION INDEX (CATEGORY)  120 (POOR).         321 (FAIR).
OUTLOOK FOR THU APR 27        1050 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      956 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA   844 (GOOD)
YAKIMA        957 (GOOD)
BEND          973 (GOOD)
PRINEVILLE    842 (GOOD)
ENTERPRISE    275 (POOR)
HERMISTON    1050 (GOOD)
JOHN DAY      299 (POOR)
LA GRANDE     342 (FAIR)
MADRAS        892 (GOOD)
MEACHAM       528 (FAIR)
PENDLETON    1022 (GOOD)
REDMOND       964 (GOOD)
SENECA        355 (FAIR)
THE DALLES    909 (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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