231
AUUS46 KPDT 111207
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
507 AM PDT SAT MAY 11 2024

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-9 MPH.         SW 9-12 MPH.
TRANSPORT WINDS               S 5-9 MPH.          W 9-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN MAY 12        GOOD.
OUTLOOK FOR MON MAY 13        GOOD.

VENTILATION INDEX (CATEGORY)  43 (POOR).          457 (FAIR).
OUTLOOK FOR SUN MAY 12        813 (GOOD).
OUTLOOK FOR MON MAY 13        856 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-7 MPH.         W 8-10 MPH.
TRANSPORT WINDS               W 3-7 MPH.          W 8-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN MAY 12        FAIR.
OUTLOOK FOR MON MAY 13        GOOD.

VENTILATION INDEX (CATEGORY)  38 (POOR).          478 (FAIR).
OUTLOOK FOR SUN MAY 12        372 (FAIR).
OUTLOOK FOR MON MAY 13        662 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 1-4 MPH.          NW 7-9 MPH.
TRANSPORT WINDS               S 3-6 MPH.          NW 8-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 12        GOOD.
OUTLOOK FOR MON MAY 13        GOOD.

VENTILATION INDEX (CATEGORY)  39 (POOR).          399 (FAIR).
OUTLOOK FOR SUN MAY 12        656 (GOOD).
OUTLOOK FOR MON MAY 13        836 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-8 MPH.         W 7-9 MPH.
TRANSPORT WINDS               S 5-10 MPH.         W 7-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN MAY 12        GOOD.
OUTLOOK FOR MON MAY 13        GOOD.

VENTILATION INDEX (CATEGORY)  48 (POOR).          347 (FAIR).
OUTLOOK FOR SUN MAY 12        814 (GOOD).
OUTLOOK FOR MON MAY 13        919 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      739 (GOOD)
ELLENSBURG    911 (GOOD)
GOLDENDALE    768 (GOOD)
TRI-CITIES    554 (FAIR)
WALLA WALLA   340 (FAIR)
YAKIMA        533 (FAIR)
BEND          601 (GOOD)
PRINEVILLE    722 (GOOD)
ENTERPRISE    504 (FAIR)
HERMISTON     450 (FAIR)
JOHN DAY      668 (GOOD)
LA GRANDE     444 (FAIR)
MADRAS        623 (GOOD)
MEACHAM       362 (FAIR)
PENDLETON     406 (FAIR)
REDMOND       728 (GOOD)
SENECA        746 (GOOD)
THE DALLES    644 (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.
$$