509
AUUS46 KPDT 221116
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
416 AM PDT SUN SEP 22 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 5-10 MPH.
TRANSPORT WINDS               S 5-10 MPH.         W 5-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON SEP 23        FAIR.
OUTLOOK FOR TUE SEP 24        FAIR.

VENTILATION INDEX (CATEGORY)  36 (POOR).          275 (POOR).
OUTLOOK FOR MON SEP 23        285 (POOR).
OUTLOOK FOR TUE SEP 24        141 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 1-4 MPH.          S 3-7 MPH.
TRANSPORT WINDS               W 2-5 MPH.          W 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON SEP 23        FAIR.
OUTLOOK FOR TUE SEP 24        FAIR.

VENTILATION INDEX (CATEGORY)  29 (POOR).          185 (POOR).
OUTLOOK FOR MON SEP 23        162 (POOR).
OUTLOOK FOR TUE SEP 24        208 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 1-3 MPH.          NW 3-5 MPH.
TRANSPORT WINDS               NW 3-5 MPH.         W 5-11 MPH.
MIXING HEIGHT                 4000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON SEP 23        FAIR.
OUTLOOK FOR TUE SEP 24        GOOD.

VENTILATION INDEX (CATEGORY)  33 (POOR).          280 (POOR).
OUTLOOK FOR MON SEP 23        286 (POOR).
OUTLOOK FOR TUE SEP 24        411 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-8 MPH.         W 5-10 MPH.
TRANSPORT WINDS               S 5-9 MPH.          W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON SEP 23        FAIR.
OUTLOOK FOR TUE SEP 24        FAIR.

VENTILATION INDEX (CATEGORY)  45 (POOR).          271 (POOR).
OUTLOOK FOR MON SEP 23        326 (FAIR).
OUTLOOK FOR TUE SEP 24        237 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      646 (GOOD)
ELLENSBURG    548 (FAIR)
GOLDENDALE    411 (FAIR)
TRI-CITIES    348 (FAIR)
WALLA WALLA   258 (POOR)
YAKIMA        158 (POOR)
BEND          288 (POOR)
PRINEVILLE    242 (POOR)
ENTERPRISE    346 (FAIR)
HERMISTON     255 (POOR)
JOHN DAY      278 (POOR)
LA GRANDE     334 (FAIR)
MADRAS        225 (POOR)
MEACHAM       224 (POOR)
PENDLETON     261 (POOR)
REDMOND       243 (POOR)
SENECA        305 (FAIR)
THE DALLES    438 (FAIR)

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.
$$