973
AUUS46 KPDT 251135
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
435 AM PDT SAT MAY 25 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 15-25 MPH.       SW 20-30 MPH.
TRANSPORT WINDS               SW 10-20 MPH.       SW 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.
OUTLOOK FOR MON MAY 27        POOR.

VENTILATION INDEX (CATEGORY)  312 (FAIR).         1050 (GOOD).
OUTLOOK FOR SUN MAY 26        434 (FAIR).
OUTLOOK FOR MON MAY 27        123 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 6-12 MPH.         W 15-20 MPH.
TRANSPORT WINDS               W 5-10 MPH.         W 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.
OUTLOOK FOR MON MAY 27        FAIR.

VENTILATION INDEX (CATEGORY)  183 (POOR).         869 (GOOD).
OUTLOOK FOR SUN MAY 26        232 (POOR).
OUTLOOK FOR MON MAY 27        274 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-6 MPH.         W 15-20 MPH.
TRANSPORT WINDS               W 3-7 MPH.          W 15-20 MPH.
MIXING HEIGHT                 4000 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 26        GOOD.
OUTLOOK FOR MON MAY 27        GOOD.

VENTILATION INDEX (CATEGORY)  95 (POOR).          612 (GOOD).
OUTLOOK FOR SUN MAY 26        297 (POOR).
OUTLOOK FOR MON MAY 27        482 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 10-20 MPH.       SW 20-25 MPH.
TRANSPORT WINDS               SW 10-20 MPH.       W 20-25 MPH.
MIXING HEIGHT                 2000 FT MSL.        7000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.
OUTLOOK FOR MON MAY 27        POOR.

VENTILATION INDEX (CATEGORY)  304 (FAIR).         1048 (GOOD).
OUTLOOK FOR SUN MAY 26        403 (FAIR).
OUTLOOK FOR MON MAY 27        83 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      551 (FAIR)
ELLENSBURG    936 (GOOD)
GOLDENDALE    939 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA        761 (GOOD)
BEND          515 (FAIR)
PRINEVILLE    678 (GOOD)
ENTERPRISE    599 (FAIR)
HERMISTON    1050 (GOOD)
JOHN DAY      426 (FAIR)
LA GRANDE     656 (GOOD)
MADRAS        793 (GOOD)
MEACHAM       819 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND       718 (GOOD)
SENECA        393 (FAIR)
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.
$$