384
AUUS46 KPDT 291143
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
443 AM PDT MON APR 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 13-22 MPH.       W 22-32 MPH.
TRANSPORT WINDS               SW 13-22 MPH.       W 25-33 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR TUE APR 30        GOOD.
OUTLOOK FOR WED MAY 1         GOOD.

VENTILATION INDEX (CATEGORY)  338 (FAIR).         1050 (GOOD).
OUTLOOK FOR TUE APR 30        992 (GOOD).
OUTLOOK FOR WED MAY 1         710 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 7-16 MPH.        W 18-22 MPH.
TRANSPORT WINDS               SW 7-16 MPH.        W 23-26 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE APR 30        GOOD.
OUTLOOK FOR WED MAY 1         FAIR.

VENTILATION INDEX (CATEGORY)  271 (POOR).         1050 (GOOD).
OUTLOOK FOR TUE APR 30        610 (GOOD).
OUTLOOK FOR WED MAY 1         450 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 6-8 MPH.          W 17-20 MPH.
TRANSPORT WINDS               W 9-12 MPH.         W 25-28 MPH.
MIXING HEIGHT                 4500 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE APR 30        GOOD.
OUTLOOK FOR WED MAY 1         GOOD.

VENTILATION INDEX (CATEGORY)  311 (FAIR).         1041 (GOOD).
OUTLOOK FOR TUE APR 30        851 (GOOD).
OUTLOOK FOR WED MAY 1         586 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 10-18 MPH.       W 20-28 MPH.
TRANSPORT WINDS               SW 12-21 MPH.       W 26-30 MPH.
MIXING HEIGHT                 2000 FT MSL.        7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR TUE APR 30        GOOD.
OUTLOOK FOR WED MAY 1         FAIR.

VENTILATION INDEX (CATEGORY)  333 (FAIR).         1048 (GOOD).
OUTLOOK FOR TUE APR 30        977 (GOOD).
OUTLOOK FOR WED MAY 1         691 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      960 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA       1050 (GOOD)
BEND         1050 (GOOD)
PRINEVILLE   1050 (GOOD)
ENTERPRISE   1050 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY     1050 (GOOD)
LA GRANDE    1050 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM      1050 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND      1050 (GOOD)
SENECA       1050 (GOOD)
THE DALLES   1050 (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.
$$