617
AUUS46 KPDT 231057
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
357 AM PDT MON SEP 23 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-11 MPH.         SW 5-9 MPH.
TRANSPORT WINDS               S 7-12 MPH.         W 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE SEP 24        FAIR.
OUTLOOK FOR WED SEP 25        GOOD.

VENTILATION INDEX (CATEGORY)  64 (POOR).          263 (POOR).
OUTLOOK FOR TUE SEP 24        131 (POOR).
OUTLOOK FOR WED SEP 25        501 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          SE 3-7 MPH.
TRANSPORT WINDS               W 4-8 MPH.          NW 3-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE SEP 24        FAIR.
OUTLOOK FOR WED SEP 25        GOOD.

VENTILATION INDEX (CATEGORY)  41 (POOR).          163 (POOR).
OUTLOOK FOR TUE SEP 24        186 (POOR).
OUTLOOK FOR WED SEP 25        962 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-4 MPH.         NW 4-8 MPH.
TRANSPORT WINDS               SW 3-7 MPH.         NW 5-9 MPH.
MIXING HEIGHT                 4000 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE SEP 24        GOOD.
OUTLOOK FOR WED SEP 25        GOOD.

VENTILATION INDEX (CATEGORY)  46 (POOR).          297 (POOR).
OUTLOOK FOR TUE SEP 24        630 (GOOD).
OUTLOOK FOR WED SEP 25        890 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-11 MPH.         W 4-9 MPH.
TRANSPORT WINDS               S 9-13 MPH.         W 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE SEP 24        FAIR.
OUTLOOK FOR WED SEP 25        GOOD.

VENTILATION INDEX (CATEGORY)  99 (POOR).          285 (POOR).
OUTLOOK FOR TUE SEP 24        233 (POOR).
OUTLOOK FOR WED SEP 25        783 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      477 (FAIR)
ELLENSBURG    494 (FAIR)
GOLDENDALE    203 (POOR)
TRI-CITIES    313 (FAIR)
WALLA WALLA   292 (POOR)
YAKIMA        175 (POOR)
BEND          237 (POOR)
PRINEVILLE    157 (POOR)
ENTERPRISE    328 (FAIR)
HERMISTON     195 (POOR)
JOHN DAY      277 (POOR)
LA GRANDE     360 (FAIR)
MADRAS         42 (POOR)
MEACHAM       224 (POOR)
PENDLETON     253 (POOR)
REDMOND       182 (POOR)
SENECA        249 (POOR)
THE DALLES    191 (POOR)

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.
$$