335
AUUS46 KPDT 291157
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
457 AM PDT SUN SEP 29 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 15-25 MPH.       W 13-18 MPH.
TRANSPORT WINDS               SW 15-25 MPH.       W 14-19 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON SEP 30        FAIR.
OUTLOOK FOR TUE OCT 1         POOR.

VENTILATION INDEX (CATEGORY)  151 (POOR).         731 (GOOD).
OUTLOOK FOR MON SEP 30        181 (POOR).
OUTLOOK FOR TUE OCT 1         155 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 7-14 MPH.         NW 10-15 MPH.
TRANSPORT WINDS               W 10-15 MPH.        NW 12-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON SEP 30        POOR.
OUTLOOK FOR TUE OCT 1         FAIR.

VENTILATION INDEX (CATEGORY)  85 (POOR).          671 (GOOD).
OUTLOOK FOR MON SEP 30        146 (POOR).
OUTLOOK FOR TUE OCT 1         119 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 7-14 MPH.        NW 11-16 MPH.
TRANSPORT WINDS               W 7-14 MPH.         NW 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON SEP 30        FAIR.
OUTLOOK FOR TUE OCT 1         FAIR.

VENTILATION INDEX (CATEGORY)  152 (POOR).         655 (GOOD).
OUTLOOK FOR MON SEP 30        223 (POOR).
OUTLOOK FOR TUE OCT 1         282 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 15-25 MPH.       W 15-20 MPH.
TRANSPORT WINDS               SW 15-25 MPH.       W 17-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON SEP 30        POOR.
OUTLOOK FOR TUE OCT 1         FAIR.

VENTILATION INDEX (CATEGORY)  201 (POOR).         733 (GOOD).
OUTLOOK FOR MON SEP 30        163 (POOR).
OUTLOOK FOR TUE OCT 1         179 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM     1018 (GOOD)
ELLENSBURG   1039 (GOOD)
GOLDENDALE    677 (GOOD)
TRI-CITIES    834 (GOOD)
WALLA WALLA   736 (GOOD)
YAKIMA        715 (GOOD)
BEND          363 (FAIR)
PRINEVILLE    457 (FAIR)
ENTERPRISE    694 (GOOD)
HERMISTON     594 (FAIR)
JOHN DAY      575 (FAIR)
LA GRANDE     738 (GOOD)
MADRAS        494 (FAIR)
MEACHAM       586 (FAIR)
PENDLETON     682 (GOOD)
REDMOND       457 (FAIR)
SENECA        503 (FAIR)
THE DALLES    775 (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/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.
$$