Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 311200
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT FRI JUL 31 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRBL 2-5 MPH.       W-NW 4-8 MPH.
TRANSPORT WINDS               VRBL 2-5 MPH.       W 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       13500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT AUG 1         FAIR.

VENTILATION INDEX (CATEGORY)  31 (POOR).          412 (FAIR).
OUTLOOK FOR SAT AUG 1         393 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 3-7 MPH.       SE-S 2-6 MPH.
TRANSPORT WINDS               W-NW 3-7 MPH.       SW-W 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       12000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT AUG 1         FAIR.

VENTILATION INDEX (CATEGORY)  35 (POOR).          446 (FAIR).
OUTLOOK FOR SAT AUG 1         407 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRBL 1-3 MPH.       N 2-6 MPH.
TRANSPORT WINDS               VRBL 1-3 MPH.       W 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       17000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT AUG 1         GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          587 (FAIR).
OUTLOOK FOR SAT AUG 1         846 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      540 (FAIR)
ELLENSBURG    817 (GOOD)
GOLDENDALE    534 (FAIR)
TRI-CITIES    406 (FAIR)
WALLA WALLA   505 (FAIR)
YAKIMA        363 (FAIR)
BEND          206 (POOR)
PRINEVILLE    400 (FAIR)
ENTERPRISE    681 (GOOD)
HERMISTON     407 (FAIR)
JOHN DAY      676 (GOOD)
LA GRANDE     587 (FAIR)
MADRAS        111 (POOR)
MEACHAM       349 (FAIR)
PENDLETON     316 (FAIR)
REDMOND       223 (POOR)
SENECA        563 (FAIR)
THE DALLES    367 (FAIR)

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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