AUUS46 KPDT 241312
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
512 AM PST TUE DEC 24 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 4-12 MPH.         SW 9-13 MPH.
TRANSPORT WINDS               S 4-12 MPH.         W 12-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED DEC 25        POOR.               
OUTLOOK FOR THU DEC 26        GOOD.               

VENTILATION INDEX (CATEGORY)  28 (POOR).          111 (POOR).
OUTLOOK FOR WED DEC 25        45 (POOR).          
OUTLOOK FOR THU DEC 26        446 (FAIR).         

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRB 1-4 MPH.        W 3-7 MPH.
TRANSPORT WINDS               VRB 1-4 MPH.        W 4-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED DEC 25        POOR.               
OUTLOOK FOR THU DEC 26        GOOD.               

VENTILATION INDEX (CATEGORY)  25 (POOR).          40 (POOR).
OUTLOOK FOR WED DEC 25        42 (POOR).          
OUTLOOK FOR THU DEC 26        137 (POOR).         

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 20-32 MPH.        W 5-7 MPH.
TRANSPORT WINDS               S 25-32 MPH.        SW 10-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR WED DEC 25        POOR.               
OUTLOOK FOR THU DEC 26        POOR.               

VENTILATION INDEX (CATEGORY)  139 (POOR).         112 (POOR).
OUTLOOK FOR WED DEC 25        133 (POOR).         
OUTLOOK FOR THU DEC 26        196 (POOR).         

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 10-22 MPH.        SW 8-14 MPH.
TRANSPORT WINDS               S 10-22 MPH.        W 14-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR WED DEC 25        POOR.               
OUTLOOK FOR THU DEC 26        GOOD.               

VENTILATION INDEX (CATEGORY)  45 (POOR).          131 (POOR).
OUTLOOK FOR WED DEC 25        90 (POOR).          
OUTLOOK FOR THU DEC 26        328 (FAIR).         

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      136 (POOR)
ELLENSBURG     66 (POOR)
GOLDENDALE    224 (POOR)
TRI-CITIES     73 (POOR)
WALLA WALLA    90 (POOR)
YAKIMA         25 (POOR)
BEND          140 (POOR)
PRINEVILLE    202 (POOR)
ENTERPRISE     39 (POOR)
HERMISTON     105 (POOR)
JOHN DAY      151 (POOR)
LA GRANDE      94 (POOR)
MADRAS        155 (POOR)
MEACHAM        94 (POOR)
PENDLETON     169 (POOR)
REDMOND       224 (POOR)
SENECA         62 (POOR)
THE DALLES    180 (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.
$$