435
AUUS46 KPDT 271129
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
429 AM PDT MON MAY 27 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 3-7 MPH.          N 4-8 MPH.
TRANSPORT WINDS               S 4-8 MPH.          NE 1-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE MAY 28        GOOD.
OUTLOOK FOR WED MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  39 (POOR).          72 (POOR).
OUTLOOK FOR TUE MAY 28        592 (FAIR).
OUTLOOK FOR WED MAY 29        1050 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-3 MPH.         SE 1-5 MPH.
TRANSPORT WINDS               NW 1-5 MPH.         S 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE MAY 28        GOOD.
OUTLOOK FOR WED MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          229 (POOR).
OUTLOOK FOR TUE MAY 28        514 (FAIR).
OUTLOOK FOR WED MAY 29        1050 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 1-3 MPH.          SE 5-10 MPH.
TRANSPORT WINDS               SE 1-3 MPH.         S 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE MAY 28        FAIR.
OUTLOOK FOR WED MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          489 (FAIR).
OUTLOOK FOR TUE MAY 28        191 (POOR).
OUTLOOK FOR WED MAY 29        804 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-7 MPH.          N 5-10 MPH.
TRANSPORT WINDS               S 5-10 MPH.         NE 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE MAY 28        FAIR.
OUTLOOK FOR WED MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  36 (POOR).          95 (POOR).
OUTLOOK FOR TUE MAY 28        448 (FAIR).
OUTLOOK FOR WED MAY 29        1050 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      185 (POOR)
ELLENSBURG    346 (FAIR)
GOLDENDALE    195 (POOR)
TRI-CITIES     63 (POOR)
WALLA WALLA   104 (POOR)
YAKIMA        313 (FAIR)
BEND          187 (POOR)
PRINEVILLE    159 (POOR)
ENTERPRISE    191 (POOR)
HERMISTON      65 (POOR)
JOHN DAY      678 (GOOD)
LA GRANDE     562 (FAIR)
MADRAS         36 (POOR)
MEACHAM       208 (POOR)
PENDLETON     142 (POOR)
REDMOND       122 (POOR)
SENECA        708 (GOOD)
THE DALLES    139 (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.
$$