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Daily Dispersion Outlook
Issued by NWS Pendleton, OR

000
AUUS46 KPDT 111219
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
519 AM PDT MON OCT 11 2021

*** 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.        NW 6-12 MPH.
TRANSPORT WINDS               W 8-16 MPH.         NW 10-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE OCT 12        POOR.

VENTILATION INDEX (CATEGORY)  79 (POOR).          507 (FAIR).
OUTLOOK FOR TUE OCT 12        78 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-9 MPH.          N 5-10 MPH.
TRANSPORT WINDS               NW 9-19 MPH.        N 7-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR TUE OCT 12        POOR.

VENTILATION INDEX (CATEGORY)  96 (POOR).          435 (FAIR).
OUTLOOK FOR TUE OCT 12        76 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         NW 10-17 MPH.
TRANSPORT WINDS               NW 9-19 MPH.        N 12-22 MPH.
MIXING HEIGHT                 4000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE OCT 12        GOOD.

VENTILATION INDEX (CATEGORY)  147 (POOR).         956 (GOOD).
OUTLOOK FOR TUE OCT 12        715 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      405 (FAIR)
ELLENSBURG    627 (GOOD)
GOLDENDALE    305 (FAIR)
TRI-CITIES    422 (FAIR)
WALLA WALLA   320 (FAIR)
YAKIMA        218 (POOR)
BEND          927 (GOOD)
PRINEVILLE    873 (GOOD)
ENTERPRISE    438 (FAIR)
HERMISTON     788 (GOOD)
JOHN DAY      987 (GOOD)
LA GRANDE     914 (GOOD)
MADRAS        801 (GOOD)
MEACHAM       699 (GOOD)
PENDLETON     695 (GOOD)
REDMOND       870 (GOOD)
SENECA        878 (GOOD)
THE DALLES    579 (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/GFORECAST/GINDEX.PHP?FCST=MIXHGT,VENTCAT,TRANSWIND,VENTINDX&VT=0,72

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$