652
AUUS46 KPDT 281117
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
417 AM PDT SUN APR 28 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 8-18 MPH.        W 18-25 MPH.
TRANSPORT WINDS               SW 8-18 MPH.        W 22-28 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR MON APR 29        GOOD.
OUTLOOK FOR TUE APR 30        GOOD.

VENTILATION INDEX (CATEGORY)  204 (POOR).         1039 (GOOD).
OUTLOOK FOR MON APR 29        1050 (GOOD).
OUTLOOK FOR TUE APR 30        1013 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 7-14 MPH.        SW 19-27 MPH.
TRANSPORT WINDS               SW 7-14 MPH.        W 22-28 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON APR 29        GOOD.
OUTLOOK FOR TUE APR 30        GOOD.

VENTILATION INDEX (CATEGORY)  204 (POOR).         1045 (GOOD).
OUTLOOK FOR MON APR 29        1050 (GOOD).
OUTLOOK FOR TUE APR 30        689 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-8 MPH.          SW 8-10 MPH.
TRANSPORT WINDS               S 4-8 MPH.          SW 10-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON APR 29        GOOD.
OUTLOOK FOR TUE APR 30        GOOD.

VENTILATION INDEX (CATEGORY)  136 (POOR).         525 (FAIR).
OUTLOOK FOR MON APR 29        772 (GOOD).
OUTLOOK FOR TUE APR 30        855 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 9-17 MPH.        W 15-22 MPH.
TRANSPORT WINDS               SW 9-17 MPH.        W 18-27 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR MON APR 29        GOOD.
OUTLOOK FOR TUE APR 30        GOOD.

VENTILATION INDEX (CATEGORY)  209 (POOR).         847 (GOOD).
OUTLOOK FOR MON APR 29        1011 (GOOD).
OUTLOOK FOR TUE APR 30        977 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      557 (FAIR)
ELLENSBURG    760 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1014 (GOOD)
YAKIMA       1009 (GOOD)
BEND          870 (GOOD)
PRINEVILLE    754 (GOOD)
ENTERPRISE    528 (FAIR)
HERMISTON    1050 (GOOD)
JOHN DAY     1013 (GOOD)
LA GRANDE     644 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM       454 (FAIR)
PENDLETON     949 (GOOD)
REDMOND       772 (GOOD)
SENECA        988 (GOOD)
THE DALLES   1049 (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.
$$