299
AUUS46 KPDT 071301
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
501 AM PST FRI FEB 7 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 9-23 MPH.        SW 7-12 MPH.
TRANSPORT WINDS               NW 7-16 MPH.        SW 8-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT FEB 8         POOR.
OUTLOOK FOR SUN FEB 9         POOR.

VENTILATION INDEX (CATEGORY)  82 (POOR).          197 (POOR).
OUTLOOK FOR SAT FEB 8         68 (POOR).
OUTLOOK FOR SUN FEB 9         84 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 5-14 MPH.        S 5-9 MPH.
TRANSPORT WINDS               NW 8-18 MPH.        SW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR SAT FEB 8         POOR.
OUTLOOK FOR SUN FEB 9         POOR.

VENTILATION INDEX (CATEGORY)  54 (POOR).          100 (POOR).
OUTLOOK FOR SAT FEB 8         48 (POOR).
OUTLOOK FOR SUN FEB 9         44 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 18-29 MPH.       NW 8-14 MPH.
TRANSPORT WINDS               NW 11-14 MPH.       W 11-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 8         FAIR.
OUTLOOK FOR SUN FEB 9         FAIR.

VENTILATION INDEX (CATEGORY)  104 (POOR).         331 (FAIR).
OUTLOOK FOR SAT FEB 8         221 (POOR).
OUTLOOK FOR SUN FEB 9         223 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 8-15 MPH.         SW 6-16 MPH.
TRANSPORT WINDS               W 5-11 MPH.         SW 9-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 8         POOR.
OUTLOOK FOR SUN FEB 9         POOR.

VENTILATION INDEX (CATEGORY)  64 (POOR).          233 (POOR).
OUTLOOK FOR SAT FEB 8         136 (POOR).
OUTLOOK FOR SUN FEB 9         144 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      201 (POOR)
ELLENSBURG     60 (POOR)
GOLDENDALE    149 (POOR)
TRI-CITIES    158 (POOR)
WALLA WALLA   263 (POOR)
YAKIMA         86 (POOR)
BEND          506 (FAIR)
PRINEVILLE    381 (FAIR)
ENTERPRISE    401 (FAIR)
HERMISTON     208 (POOR)
JOHN DAY      355 (FAIR)
LA GRANDE     412 (FAIR)
MADRAS        277 (POOR)
MEACHAM       198 (POOR)
PENDLETON     206 (POOR)
REDMOND       403 (FAIR)
SENECA        508 (FAIR)
THE DALLES    110 (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:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$