747
AUUS46 KPDT 191132
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
432 AM PDT SUN MAY 19 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 12-18 MPH.       W 8-14 MPH.
TRANSPORT WINDS               SW 10-20 MPH.       W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON MAY 20        FAIR.
OUTLOOK FOR TUE MAY 21        GOOD.

VENTILATION INDEX (CATEGORY)  206 (POOR).         735 (GOOD).
OUTLOOK FOR MON MAY 20        559 (FAIR).
OUTLOOK FOR TUE MAY 21        812 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 6-12 MPH.        NW 7-12 MPH.
TRANSPORT WINDS               NW 7-14 MPH.        NW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON MAY 20        FAIR.
OUTLOOK FOR TUE MAY 21        FAIR.

VENTILATION INDEX (CATEGORY)  156 (POOR).         675 (GOOD).
OUTLOOK FOR MON MAY 20        449 (FAIR).
OUTLOOK FOR TUE MAY 21        409 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 6-12 MPH.        NW 10-15 MPH.
TRANSPORT WINDS               NW 8-12 MPH.        NW 8-12 MPH.
MIXING HEIGHT                 4000 FT MSL.        10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAY 20        GOOD.
OUTLOOK FOR TUE MAY 21        GOOD.

VENTILATION INDEX (CATEGORY)  230 (POOR).         595 (FAIR).
OUTLOOK FOR MON MAY 20        912 (GOOD).
OUTLOOK FOR TUE MAY 21        693 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 12-18 MPH.       W 8-12 MPH.
TRANSPORT WINDS               SW 15-20 MPH.       W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           GOOD.               FAIR.
OUTLOOK FOR MON MAY 20        FAIR.
OUTLOOK FOR TUE MAY 21        GOOD.

VENTILATION INDEX (CATEGORY)  247 (POOR).         664 (GOOD).
OUTLOOK FOR MON MAY 20        521 (FAIR).
OUTLOOK FOR TUE MAY 21        831 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      687 (GOOD)
ELLENSBURG    937 (GOOD)
GOLDENDALE    816 (GOOD)
TRI-CITIES    745 (GOOD)
WALLA WALLA   651 (GOOD)
YAKIMA        773 (GOOD)
BEND          644 (GOOD)
PRINEVILLE    718 (GOOD)
ENTERPRISE    615 (GOOD)
HERMISTON     698 (GOOD)
JOHN DAY      634 (GOOD)
LA GRANDE     627 (GOOD)
MADRAS        837 (GOOD)
MEACHAM       561 (FAIR)
PENDLETON     743 (GOOD)
REDMOND       702 (GOOD)
SENECA        679 (GOOD)
THE DALLES   1048 (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.
$$