Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 051143
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
443 AM PDT TUE MAY 5 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 5-10 MPH.        W 10-20 MPH.
TRANSPORT WINDS               W 6-12 MPH.         W 15-25 MPH.
MIXING HEIGHT                 4500 FT MSL.        10000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR WED MAY 6         GOOD.

VENTILATION INDEX (CATEGORY)  368 (FAIR).         1049 (GOOD).
OUTLOOK FOR WED MAY 6         827 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-5 MPH.          W 10-17 MPH.
TRANSPORT WINDS               SW 5-9 MPH.         W 13-23 MPH.
MIXING HEIGHT                 5500 FT MSL.        12000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR WED MAY 6         GOOD.

VENTILATION INDEX (CATEGORY)  281 (POOR).         1050 (GOOD).
OUTLOOK FOR WED MAY 6         1027 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         NW 10-18 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        NW 14-22 MPH.
MIXING HEIGHT                 5500 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR WED MAY 6         GOOD.

VENTILATION INDEX (CATEGORY)  139 (POOR).         581 (FAIR).
OUTLOOK FOR WED MAY 6         872 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM     1050 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1049 (GOOD)
YAKIMA       1050 (GOOD)
BEND          597 (FAIR)
PRINEVILLE    737 (GOOD)
ENTERPRISE    542 (FAIR)
HERMISTON    1050 (GOOD)
JOHN DAY      614 (GOOD)
LA GRANDE     642 (GOOD)
MADRAS        751 (GOOD)
MEACHAM       802 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND       691 (GOOD)
SENECA        586 (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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