282
AUUS46 KPDT 211334
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
534 AM PST THU NOV 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                 E 3-7 MPH.          NW 4-7 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         SW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI NOV 22        POOR.
OUTLOOK FOR SAT NOV 23        FAIR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          50 (POOR).
OUTLOOK FOR FRI NOV 22        61 (POOR).
OUTLOOK FOR SAT NOV 23        282 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-4 MPH.         NW 2-5 MPH.
TRANSPORT WINDS               N 2-4 MPH.          SW 2-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI NOV 22        POOR.
OUTLOOK FOR SAT NOV 23        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          31 (POOR).
OUTLOOK FOR FRI NOV 22        44 (POOR).
OUTLOOK FOR SAT NOV 23        127 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 15-24 MPH.        S 16-19 MPH.
TRANSPORT WINDS               S 16-23 MPH.        S 16-19 MPH.
MIXING HEIGHT                 4000 FT MSL.        4500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR FRI NOV 22        GOOD.
OUTLOOK FOR SAT NOV 23        FAIR.

VENTILATION INDEX (CATEGORY)  210 (POOR).         287 (POOR).
OUTLOOK FOR FRI NOV 22        481 (FAIR).
OUTLOOK FOR SAT NOV 23        254 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 7-14 MPH.        S 5-9 MPH.
TRANSPORT WINDS               S 7-14 MPH.         S 8-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI NOV 22        GOOD.
OUTLOOK FOR SAT NOV 23        FAIR.

VENTILATION INDEX (CATEGORY)  59 (POOR).          96 (POOR).
OUTLOOK FOR FRI NOV 22        221 (POOR).
OUTLOOK FOR SAT NOV 23        308 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      165 (POOR)
ELLENSBURG     59 (POOR)
GOLDENDALE     75 (POOR)
TRI-CITIES     60 (POOR)
WALLA WALLA    67 (POOR)
YAKIMA         27 (POOR)
BEND          302 (FAIR)
PRINEVILLE    356 (FAIR)
ENTERPRISE    170 (POOR)
HERMISTON      51 (POOR)
JOHN DAY      184 (POOR)
LA GRANDE     260 (POOR)
MADRAS        247 (POOR)
MEACHAM        89 (POOR)
PENDLETON      45 (POOR)
REDMOND       358 (FAIR)
SENECA        336 (FAIR)
THE DALLES     63 (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.
$$