991
AUUS46 KPDT 241018
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
318 AM PDT FRI MAY 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 5-11 MPH.         W 12-17 MPH.
TRANSPORT WINDS               S 5-11 MPH.         W 14-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 25        GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  113 (POOR).         677 (GOOD).
OUTLOOK FOR SAT MAY 25        1048 (GOOD).
OUTLOOK FOR SUN MAY 26        561 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          W 7-10 MPH.
TRANSPORT WINDS               W 2-6 MPH.          W 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT MAY 25        GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  65 (POOR).          558 (FAIR).
OUTLOOK FOR SAT MAY 25        902 (GOOD).
OUTLOOK FOR SUN MAY 26        286 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-7 MPH.         W 6-8 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         SW 5-9 MPH.
MIXING HEIGHT                 4000 FT MSL.        6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT MAY 25        GOOD.
OUTLOOK FOR SUN MAY 26        GOOD.

VENTILATION INDEX (CATEGORY)  146 (POOR).         378 (FAIR).
OUTLOOK FOR SAT MAY 25        913 (GOOD).
OUTLOOK FOR SUN MAY 26        466 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-9 MPH.          W 8-14 MPH.
TRANSPORT WINDS               S 4-9 MPH.          W 11-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT MAY 25        GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  105 (POOR).         463 (FAIR).
OUTLOOK FOR SAT MAY 25        1048 (GOOD).
OUTLOOK FOR SUN MAY 26        485 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      555 (FAIR)
ELLENSBURG    625 (GOOD)
GOLDENDALE    758 (GOOD)
TRI-CITIES    780 (GOOD)
WALLA WALLA   508 (FAIR)
YAKIMA        469 (FAIR)
BEND          713 (GOOD)
PRINEVILLE    849 (GOOD)
ENTERPRISE    450 (FAIR)
HERMISTON     779 (GOOD)
JOHN DAY      727 (GOOD)
LA GRANDE     329 (FAIR)
MADRAS        624 (GOOD)
MEACHAM       227 (POOR)
PENDLETON     537 (FAIR)
REDMOND       871 (GOOD)
SENECA        962 (GOOD)
THE DALLES    929 (GOOD)

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.
$$