Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 271201
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
501 AM PDT MON JUL 27 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-W 8-14 MPH.      SW-W 8-14 MPH.
TRANSPORT WINDS               SW-W 8-14 MPH.      W 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUL 28        POOR.

VENTILATION INDEX (CATEGORY)  156 (POOR).         787 (GOOD).
OUTLOOK FOR TUE JUL 28        264 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 3-7 MPH.       W-NW 7-12 MPH.
TRANSPORT WINDS               W-NW 3-7 MPH.       NW 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE JUL 28        POOR.

VENTILATION INDEX (CATEGORY)  104 (POOR).         722 (GOOD).
OUTLOOK FOR TUE JUL 28        192 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 5-10 MPH.      NW 9-12 MPH.
TRANSPORT WINDS               W-NW 4-8 MPH.       NW 12-15 MPH.
MIXING HEIGHT                 4000 FT MSL.        11000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE JUL 28        FAIR.

VENTILATION INDEX (CATEGORY)  144 (POOR).         845 (GOOD).
OUTLOOK FOR TUE JUL 28        196 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      501 (FAIR)
ELLENSBURG    705 (GOOD)
GOLDENDALE    546 (FAIR)
TRI-CITIES    784 (GOOD)
WALLA WALLA   807 (GOOD)
YAKIMA        830 (GOOD)
BEND          510 (FAIR)
PRINEVILLE    604 (GOOD)
ENTERPRISE    917 (GOOD)
HERMISTON     751 (GOOD)
JOHN DAY      852 (GOOD)
LA GRANDE     893 (GOOD)
MADRAS        576 (FAIR)
MEACHAM       773 (GOOD)
PENDLETON     830 (GOOD)
REDMOND       582 (FAIR)
SENECA        888 (GOOD)
THE DALLES    679 (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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