Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 241126
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
426 AM PDT MON APR 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                 S 4-9 MPH.          W 5-10 MPH.
TRANSPORT WINDS               S 4-8 MPH.          SW 6-12 MPH.
MIXING HEIGHT                 2500 FT MSL.        6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE APR 25        GOOD.

VENTILATION INDEX (CATEGORY)  138 (POOR).         344 (FAIR).
OUTLOOK FOR TUE APR 25        777 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 3-7 MPH.         SW 3-8 MPH.
TRANSPORT WINDS               SW 5-10 MPH.         S 5-10 MPH.
MIXING HEIGHT                 2500 FT MSL.        6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE APR 25        FAIR.

VENTILATION INDEX (CATEGORY)  123 (POOR).         234 (POOR).
OUTLOOK FOR TUE APR 25        392 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-8 MPH.          SW 5-8 MPH.
TRANSPORT WINDS               SW 4-8 MPH.         W 7-11 MPH.
MIXING HEIGHT                 5000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE APR 25        GOOD.

VENTILATION INDEX (CATEGORY)  70 (POOR).          266 (POOR).
OUTLOOK FOR TUE APR 25        247 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      149 (POOR)
ELLENSBURG    247 (POOR)
GOLDENDALE    177 (POOR)
TRI-CITIES    385 (FAIR)
WALLA WALLA   327 (FAIR)
YAKIMA        193 (POOR)
BEND         1050 (GOOD)
PRINEVILLE   1046 (GOOD)
ENTERPRISE     71 (POOR)
HERMISTON     388 (FAIR)
JOHN DAY      529 (FAIR)
LA GRANDE     282 (POOR)
MADRAS       1050 (GOOD)
MEACHAM       202 (POOR)
PENDLETON     218 (POOR)
REDMOND      1050 (GOOD)
SENECA        701 (GOOD)
THE DALLES    236 (POOR)

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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