044
AUUS46 KPDT 271137
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
437 AM PDT SAT APR 27 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 12-20 MPH.       SW 15-25 MPH.
TRANSPORT WINDS               SW 12-20 MPH.       SW 20-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SUN APR 28        GOOD.
OUTLOOK FOR MON APR 29        GOOD.

VENTILATION INDEX (CATEGORY)  211 (POOR).         1026 (GOOD).
OUTLOOK FOR SUN APR 28        1017 (GOOD).
OUTLOOK FOR MON APR 29        1050 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-10 MPH.         W 12-20 MPH.
TRANSPORT WINDS               W 5-10 MPH.         W 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN APR 28        GOOD.
OUTLOOK FOR MON APR 29        GOOD.

VENTILATION INDEX (CATEGORY)  68 (POOR).          851 (GOOD).
OUTLOOK FOR SUN APR 28        956 (GOOD).
OUTLOOK FOR MON APR 29        1050 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         NW 6-12 MPH.
TRANSPORT WINDS               NW 5-9 MPH.         W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN APR 28        FAIR.
OUTLOOK FOR MON APR 29        GOOD.

VENTILATION INDEX (CATEGORY)  99 (POOR).          393 (FAIR).
OUTLOOK FOR SUN APR 28        484 (FAIR).
OUTLOOK FOR MON APR 29        1050 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 12-20 MPH.       W 12-22 MPH.
TRANSPORT WINDS               SW 12-20 MPH.       SW 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR SUN APR 28        GOOD.
OUTLOOK FOR MON APR 29        GOOD.

VENTILATION INDEX (CATEGORY)  227 (POOR).         746 (GOOD).
OUTLOOK FOR SUN APR 28        831 (GOOD).
OUTLOOK FOR MON APR 29        997 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      402 (FAIR)
ELLENSBURG    474 (FAIR)
GOLDENDALE    954 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA   868 (GOOD)
YAKIMA        581 (FAIR)
BEND          557 (FAIR)
PRINEVILLE    453 (FAIR)
ENTERPRISE    275 (POOR)
HERMISTON    1050 (GOOD)
JOHN DAY      465 (FAIR)
LA GRANDE     458 (FAIR)
MADRAS        741 (GOOD)
MEACHAM       379 (FAIR)
PENDLETON     901 (GOOD)
REDMOND       450 (FAIR)
SENECA        587 (FAIR)
THE DALLES    735 (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.
$$