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Daily Dispersion Outlook
Issued by NWS Pendleton, OR

000
AUUS46 KPDT 151130
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
430 AM PDT MON APR 15 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 18-28 MPH.       SW 22-35 MPH.
TRANSPORT WINDS               SW 20-35 MPH.       W 22-35 MPH.
MIXING HEIGHT                 1500 FT MSL.        6500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR TUE APR 16        GOOD.
OUTLOOK FOR WED APR 17        FAIR.

VENTILATION INDEX (CATEGORY)  277 (POOR).         1012 (GOOD).
OUTLOOK FOR TUE APR 16        834 (GOOD).
OUTLOOK FOR WED APR 17        601 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 9-17 MPH.        W 15-20 MPH.
TRANSPORT WINDS               NW 9-17 MPH.        W 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR TUE APR 16        GOOD.
OUTLOOK FOR WED APR 17        FAIR.

VENTILATION INDEX (CATEGORY)  158 (POOR).         676 (GOOD).
OUTLOOK FOR TUE APR 16        783 (GOOD).
OUTLOOK FOR WED APR 17        579 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 6-10 MPH.         W 14-19 MPH.
TRANSPORT WINDS               W 6-10 MPH.         W 17-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE APR 16        GOOD.
OUTLOOK FOR WED APR 17        GOOD.

VENTILATION INDEX (CATEGORY)  156 (POOR).         658 (GOOD).
OUTLOOK FOR TUE APR 16        791 (GOOD).
OUTLOOK FOR WED APR 17        763 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 15-20 MPH.       W 21-30 MPH.
TRANSPORT WINDS               SW 17-28 MPH.       W 22-28 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR TUE APR 16        GOOD.
OUTLOOK FOR WED APR 17        FAIR.

VENTILATION INDEX (CATEGORY)  281 (POOR).         924 (GOOD).
OUTLOOK FOR TUE APR 16        856 (GOOD).
OUTLOOK FOR WED APR 17        566 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      763 (GOOD)
ELLENSBURG    958 (GOOD)
GOLDENDALE   1047 (GOOD)
TRI-CITIES    953 (GOOD)
WALLA WALLA   889 (GOOD)
YAKIMA        740 (GOOD)
BEND          449 (FAIR)
PRINEVILLE    670 (GOOD)
ENTERPRISE    495 (FAIR)
HERMISTON    1020 (GOOD)
JOHN DAY      791 (GOOD)
LA GRANDE     736 (GOOD)
MADRAS        647 (GOOD)
MEACHAM       668 (GOOD)
PENDLETON    1041 (GOOD)
REDMOND       677 (GOOD)
SENECA        794 (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.

$$