Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 241100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT FRI APR 24 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SW 6-12 MPH.      SW-W 10-20 MPH.
TRANSPORT WINDS               SW 17-23 MPH.       SW 20-30 MPH.
MIXING HEIGHT                 3500 FT MSL.        11000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR SAT APR 25        GOOD.

VENTILATION INDEX (CATEGORY)  344 (FAIR).         1050 (GOOD).
OUTLOOK FOR SAT APR 25        597 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         SW 10-15 MPH.
TRANSPORT WINDS               SW 20-25 MPH.       SW 30-40 MPH.
MIXING HEIGHT                 3000 FT MSL.        11000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR SAT APR 25        FAIR.

VENTILATION INDEX (CATEGORY)  80 (POOR).          1050 (GOOD).
OUTLOOK FOR SAT APR 25        472 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 7-13 MPH.        NW 10-15 MPH.
TRANSPORT WINDS               SW 20-25 MPH.       SW 20-30 MPH.
MIXING HEIGHT                 6500 FT MSL.        11000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR SAT APR 25        GOOD.

VENTILATION INDEX (CATEGORY)  214 (POOR).         674 (GOOD).
OUTLOOK FOR SAT APR 25        432 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM     1050 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA       1050 (GOOD)
BEND          626 (GOOD)
PRINEVILLE    839 (GOOD)
ENTERPRISE    695 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY      582 (FAIR)
LA GRANDE     717 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM       805 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND       975 (GOOD)
SENECA        568 (FAIR)
THE DALLES   1050 (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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