622
AUUS46 KPDT 261117
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
417 AM PDT SUN MAY 26 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-SW 9-17 MPH.      SW 10-14 MPH.
TRANSPORT WINDS               S-SW 9-17 MPH.      W 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON MAY 27        POOR.
OUTLOOK FOR TUE MAY 28        GOOD.

VENTILATION INDEX (CATEGORY)  213 (POOR).         526 (FAIR).
OUTLOOK FOR MON MAY 27        129 (POOR).
OUTLOOK FOR TUE MAY 28        676 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          SW 5-9 MPH.
TRANSPORT WINDS               W 2-6 MPH.          W 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON MAY 27        FAIR.
OUTLOOK FOR TUE MAY 28        GOOD.

VENTILATION INDEX (CATEGORY)  55 (POOR).          382 (FAIR).
OUTLOOK FOR MON MAY 27        255 (POOR).
OUTLOOK FOR TUE MAY 28        684 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-4 MPH.         NW 6-8 MPH.
TRANSPORT WINDS               SW 4-9 MPH.         W 9-11 MPH.
MIXING HEIGHT                 4500 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAY 27        GOOD.
OUTLOOK FOR TUE MAY 28        FAIR.

VENTILATION INDEX (CATEGORY)  150 (POOR).         501 (FAIR).
OUTLOOK FOR MON MAY 27        545 (FAIR).
OUTLOOK FOR TUE MAY 28        324 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 7-17 MPH.         W 7-12 MPH.
TRANSPORT WINDS               SW 10-18 MPH.       W 10-13 MPH.
MIXING HEIGHT                 2000 FT MSL.        6000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON MAY 27        POOR.
OUTLOOK FOR TUE MAY 28        FAIR.

VENTILATION INDEX (CATEGORY)  233 (POOR).         478 (FAIR).
OUTLOOK FOR MON MAY 27        134 (POOR).
OUTLOOK FOR TUE MAY 28        494 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      422 (FAIR)
ELLENSBURG    500 (FAIR)
GOLDENDALE    630 (GOOD)
TRI-CITIES    529 (FAIR)
WALLA WALLA   517 (FAIR)
YAKIMA        352 (FAIR)
BEND          419 (FAIR)
PRINEVILLE    391 (FAIR)
ENTERPRISE    571 (FAIR)
HERMISTON     557 (FAIR)
JOHN DAY      529 (FAIR)
LA GRANDE     579 (FAIR)
MADRAS        336 (FAIR)
MEACHAM       371 (FAIR)
PENDLETON     500 (FAIR)
REDMOND       397 (FAIR)
SENECA        619 (GOOD)
THE DALLES    608 (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.
$$