017
AUUS46 KPDT 211142
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
442 AM PDT SAT SEP 21 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 3-7 MPH.          N 4-7 MPH.
TRANSPORT WINDS               SW 3-6 MPH.         N 4-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN SEP 22        FAIR.
OUTLOOK FOR MON SEP 23        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          171 (POOR).
OUTLOOK FOR SUN SEP 22        331 (FAIR).
OUTLOOK FOR MON SEP 23        287 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         E 2-5 MPH.
TRANSPORT WINDS               NW 5-7 MPH.         SE 4-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN SEP 22        FAIR.
OUTLOOK FOR MON SEP 23        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          143 (POOR).
OUTLOOK FOR SUN SEP 22        200 (POOR).
OUTLOOK FOR MON SEP 23        192 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 5-10 MPH.        NW 5-10 MPH.
TRANSPORT WINDS               N 5-10 MPH.         N 8-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN SEP 22        FAIR.
OUTLOOK FOR MON SEP 23        FAIR.

VENTILATION INDEX (CATEGORY)  39 (POOR).          490 (FAIR).
OUTLOOK FOR SUN SEP 22        278 (POOR).
OUTLOOK FOR MON SEP 23        321 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         N 4-7 MPH.
TRANSPORT WINDS               S 3-6 MPH.          N 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN SEP 22        FAIR.
OUTLOOK FOR MON SEP 23        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          221 (POOR).
OUTLOOK FOR SUN SEP 22        297 (POOR).
OUTLOOK FOR MON SEP 23        323 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      152 (POOR)
ELLENSBURG    136 (POOR)
GOLDENDALE    162 (POOR)
TRI-CITIES    145 (POOR)
WALLA WALLA   185 (POOR)
YAKIMA        146 (POOR)
BEND          190 (POOR)
PRINEVILLE    233 (POOR)
ENTERPRISE    338 (FAIR)
HERMISTON     148 (POOR)
JOHN DAY      246 (POOR)
LA GRANDE     502 (FAIR)
MADRAS        266 (POOR)
MEACHAM       233 (POOR)
PENDLETON     214 (POOR)
REDMOND       227 (POOR)
SENECA        239 (POOR)
THE DALLES    169 (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.
$$