Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 291100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT FRI MAY 29 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-7 MPH.         N 4-9 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         SW 17-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       12500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 30        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          580 (FAIR).
OUTLOOK FOR SAT MAY 30        981 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         SE 3-7 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         SW 17-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       11500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 30        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          820 (GOOD).
OUTLOOK FOR SAT MAY 30        688 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 0-4 MPH.         S 3-7 MPH.
TRANSPORT WINDS               NW 0-4 MPH.         SW 17-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       12000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 30        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          719 (GOOD).
OUTLOOK FOR SAT MAY 30        465 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      655 (GOOD)
ELLENSBURG   1024 (GOOD)
GOLDENDALE    681 (GOOD)
TRI-CITIES    622 (GOOD)
WALLA WALLA   529 (FAIR)
YAKIMA        995 (GOOD)
BEND          381 (FAIR)
PRINEVILLE    573 (FAIR)
ENTERPRISE    398 (FAIR)
HERMISTON     474 (FAIR)
JOHN DAY     1041 (GOOD)
LA GRANDE     768 (GOOD)
MADRAS        314 (FAIR)
MEACHAM       581 (FAIR)
PENDLETON     479 (FAIR)
REDMOND       369 (FAIR)
SENECA       1050 (GOOD)
THE DALLES    488 (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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