827
AUUS46 KPDT 221140
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
440 AM PDT WED MAY 22 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 19-31 MPH.       SW 16-25 MPH.
TRANSPORT WINDS               W 22-33 MPH.        W 18-27 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR THU MAY 23        FAIR.
OUTLOOK FOR FRI MAY 24        GOOD.

VENTILATION INDEX (CATEGORY)  622 (GOOD).         936 (GOOD).
OUTLOOK FOR THU MAY 23        496 (FAIR).
OUTLOOK FOR FRI MAY 24        745 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 12-20 MPH.        NW 14-19 MPH.
TRANSPORT WINDS               W 14-22 MPH.        NW 17-24 MPH.
MIXING HEIGHT                 2000 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR THU MAY 23        FAIR.
OUTLOOK FOR FRI MAY 24        GOOD.

VENTILATION INDEX (CATEGORY)  649 (GOOD).         1023 (GOOD).
OUTLOOK FOR THU MAY 23        366 (FAIR).
OUTLOOK FOR FRI MAY 24        568 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 9-12 MPH.        W 15-21 MPH.
TRANSPORT WINDS               W 11-18 MPH.        W 17-20 MPH.
MIXING HEIGHT                 5000 FT MSL.        7000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU MAY 23        FAIR.
OUTLOOK FOR FRI MAY 24        GOOD.

VENTILATION INDEX (CATEGORY)  482 (FAIR).         866 (GOOD).
OUTLOOK FOR THU MAY 23        241 (POOR).
OUTLOOK FOR FRI MAY 24        565 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 18-27 MPH.       SW 16-23 MPH.
TRANSPORT WINDS               W 20-29 MPH.        W 15-24 MPH.
MIXING HEIGHT                 2500 FT MSL.        4500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR THU MAY 23        FAIR.
OUTLOOK FOR FRI MAY 24        FAIR.

VENTILATION INDEX (CATEGORY)  613 (GOOD).         892 (GOOD).
OUTLOOK FOR THU MAY 23        354 (FAIR).
OUTLOOK FOR FRI MAY 24        647 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      954 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES    861 (GOOD)
WALLA WALLA   883 (GOOD)
YAKIMA       1050 (GOOD)
BEND         1050 (GOOD)
PRINEVILLE   1050 (GOOD)
ENTERPRISE    995 (GOOD)
HERMISTON    1048 (GOOD)
JOHN DAY     1050 (GOOD)
LA GRANDE     965 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM       548 (FAIR)
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.
$$