904
AUUS46 KPDT 281117
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
417 AM PDT TUE MAY 28 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 5-11 MPH.        SW 19-26 MPH.
TRANSPORT WINDS               S 6-12 MPH.         SW 21-26 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED MAY 29        GOOD.
OUTLOOK FOR THU MAY 30        POOR.

VENTILATION INDEX (CATEGORY)  70 (POOR).          735 (GOOD).
OUTLOOK FOR WED MAY 29        1049 (GOOD).
OUTLOOK FOR THU MAY 30        262 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          W 15-20 MPH.
TRANSPORT WINDS               NW 6-9 MPH.         W 18-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED MAY 29        GOOD.
OUTLOOK FOR THU MAY 30        POOR.

VENTILATION INDEX (CATEGORY)  52 (POOR).          823 (GOOD).
OUTLOOK FOR WED MAY 29        1050 (GOOD).
OUTLOOK FOR THU MAY 30        144 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 0-2 MPH.         NW 13-17 MPH.
TRANSPORT WINDS               SW 0-2 MPH.         NW 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED MAY 29        GOOD.
OUTLOOK FOR THU MAY 30        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          282 (POOR).
OUTLOOK FOR WED MAY 29        749 (GOOD).
OUTLOOK FOR THU MAY 30        192 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-7 MPH.          W 16-23 MPH.
TRANSPORT WINDS               SW 6-11 MPH.        W 17-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED MAY 29        GOOD.
OUTLOOK FOR THU MAY 30        FAIR.

VENTILATION INDEX (CATEGORY)  71 (POOR).          585 (FAIR).
OUTLOOK FOR WED MAY 29        1041 (GOOD).
OUTLOOK FOR THU MAY 30        303 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      379 (FAIR)
ELLENSBURG    646 (GOOD)
GOLDENDALE    692 (GOOD)
TRI-CITIES    747 (GOOD)
WALLA WALLA   669 (GOOD)
YAKIMA        764 (GOOD)
BEND          384 (FAIR)
PRINEVILLE    496 (FAIR)
ENTERPRISE    264 (POOR)
HERMISTON     802 (GOOD)
JOHN DAY      299 (POOR)
LA GRANDE     310 (FAIR)
MADRAS        546 (FAIR)
MEACHAM       333 (FAIR)
PENDLETON     751 (GOOD)
REDMOND       560 (FAIR)
SENECA        318 (FAIR)
THE DALLES    780 (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.
$$