334
AUUS46 KPDT 071117
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
417 AM PDT TUE MAY 7 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 18-31 MPH.       W 19-27 MPH.
TRANSPORT WINDS               SW 17-29 MPH.       W 20-26 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR WED MAY 8         FAIR.
OUTLOOK FOR THU MAY 9         FAIR.

VENTILATION INDEX (CATEGORY)  319 (FAIR).         1049 (GOOD).
OUTLOOK FOR WED MAY 8         369 (FAIR).
OUTLOOK FOR THU MAY 9         422 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 9-15 MPH.         NW 15-23 MPH.
TRANSPORT WINDS               W 9-16 MPH.         NW 22-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR WED MAY 8         FAIR.
OUTLOOK FOR THU MAY 9         GOOD.

VENTILATION INDEX (CATEGORY)  350 (FAIR).         1050 (GOOD).
OUTLOOK FOR WED MAY 8         494 (FAIR).
OUTLOOK FOR THU MAY 9         511 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 12-18 MPH.        NW 14-20 MPH.
TRANSPORT WINDS               W 16-19 MPH.        NW 18-21 MPH.
MIXING HEIGHT                 4500 FT MSL.        7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR WED MAY 8         GOOD.
OUTLOOK FOR THU MAY 9         FAIR.

VENTILATION INDEX (CATEGORY)  390 (FAIR).         847 (GOOD).
OUTLOOK FOR WED MAY 8         598 (FAIR).
OUTLOOK FOR THU MAY 9         401 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 19-27 MPH.       W 17-24 MPH.
TRANSPORT WINDS               SW 19-26 MPH.       W 20-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR WED MAY 8         FAIR.
OUTLOOK FOR THU MAY 9         FAIR.

VENTILATION INDEX (CATEGORY)  360 (FAIR).         997 (GOOD).
OUTLOOK FOR WED MAY 8         328 (FAIR).
OUTLOOK FOR THU MAY 9         355 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM     1049 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1048 (GOOD)
YAKIMA       1050 (GOOD)
BEND         1038 (GOOD)
PRINEVILLE   1050 (GOOD)
ENTERPRISE    868 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY      927 (GOOD)
LA GRANDE     860 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM       745 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND      1050 (GOOD)
SENECA       1017 (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.

$$