551
AUUS46 KPDT 061155
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
455 AM PDT MON MAY 6 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 10-20 MPH.       W 20-30 MPH.
TRANSPORT WINDS               SW 15-25 MPH.       W 25-35 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR TUE MAY 7         GOOD.
OUTLOOK FOR WED MAY 8         FAIR.

VENTILATION INDEX (CATEGORY)  176 (POOR).         1048 (GOOD).
OUTLOOK FOR TUE MAY 7         1050 (GOOD).
OUTLOOK FOR WED MAY 8         492 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-10 MPH.         W 15-25 MPH.
TRANSPORT WINDS               SW 8-15 MPH.        W 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE MAY 7         GOOD.
OUTLOOK FOR WED MAY 8         FAIR.

VENTILATION INDEX (CATEGORY)  242 (POOR).         1050 (GOOD).
OUTLOOK FOR TUE MAY 7         1050 (GOOD).
OUTLOOK FOR WED MAY 8         483 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-10 MPH.         W 10-15 MPH.
TRANSPORT WINDS               W 8-14 MPH.         W 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE MAY 7         GOOD.
OUTLOOK FOR WED MAY 8         FAIR.

VENTILATION INDEX (CATEGORY)  130 (POOR).         663 (GOOD).
OUTLOOK FOR TUE MAY 7         1050 (GOOD).
OUTLOOK FOR WED MAY 8         654 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 10-20 MPH.       SW 15-25 MPH.
TRANSPORT WINDS               SW 15-25 MPH.       W 20-35 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR TUE MAY 7         GOOD.
OUTLOOK FOR WED MAY 8         FAIR.

VENTILATION INDEX (CATEGORY)  168 (POOR).         942 (GOOD).
OUTLOOK FOR TUE MAY 7         1050 (GOOD).
OUTLOOK FOR WED MAY 8         479 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      994 (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    887 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY      562 (FAIR)
LA GRANDE     783 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM       597 (FAIR)
PENDLETON     964 (GOOD)
REDMOND      1050 (GOOD)
SENECA        685 (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.
$$