141
AUUS46 KPDT 201206
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
506 AM PDT MON MAY 20 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 5-10 MPH.        W 6-12 MPH.
TRANSPORT WINDS               W 5-10 MPH.         W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE MAY 21        GOOD.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  99 (POOR).          612 (GOOD).
OUTLOOK FOR TUE MAY 21        828 (GOOD).
OUTLOOK FOR WED MAY 22        1013 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         NW 6-12 MPH.
TRANSPORT WINDS               NW 6-12 MPH.        NW 7-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE MAY 21        FAIR.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  88 (POOR).          575 (FAIR).
OUTLOOK FOR TUE MAY 21        404 (FAIR).
OUTLOOK FOR WED MAY 22        917 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 6-12 MPH.        NW 12-20 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        NW 14-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE MAY 21        GOOD.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  105 (POOR).         820 (GOOD).
OUTLOOK FOR TUE MAY 21        699 (GOOD).
OUTLOOK FOR WED MAY 22        664 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        NW 6-12 MPH.
TRANSPORT WINDS               SW 6-12 MPH.        NW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE MAY 21        GOOD.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  122 (POOR).         555 (FAIR).
OUTLOOK FOR TUE MAY 21        845 (GOOD).
OUTLOOK FOR WED MAY 22        902 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      566 (FAIR)
ELLENSBURG    868 (GOOD)
GOLDENDALE    544 (FAIR)
TRI-CITIES    705 (GOOD)
WALLA WALLA   510 (FAIR)
YAKIMA        637 (GOOD)
BEND          521 (FAIR)
PRINEVILLE    522 (FAIR)
ENTERPRISE    686 (GOOD)
HERMISTON     556 (FAIR)
JOHN DAY      831 (GOOD)
LA GRANDE     814 (GOOD)
MADRAS        384 (FAIR)
MEACHAM       580 (FAIR)
PENDLETON     559 (FAIR)
REDMOND       482 (FAIR)
SENECA        917 (GOOD)
THE DALLES    562 (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.
$$