617
AUUS46 KPDT 031159
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
459 AM PDT FRI MAY 3 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 4-7 MPH.          E 6-12 MPH.
TRANSPORT WINDS               S 5-10 MPH.         SE 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 4         GOOD.
OUTLOOK FOR SUN MAY 5         GOOD.

VENTILATION INDEX (CATEGORY)  64 (POOR).          656 (GOOD).
OUTLOOK FOR SAT MAY 4         677 (GOOD).
OUTLOOK FOR SUN MAY 5         568 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 2-5 MPH.         SE 7-13 MPH.
TRANSPORT WINDS               S 2-7 MPH.          SE 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 4         GOOD.
OUTLOOK FOR SUN MAY 5         GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          999 (GOOD).
OUTLOOK FOR SAT MAY 4         684 (GOOD).
OUTLOOK FOR SUN MAY 5         417 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 1-4 MPH.          SE 8-12 MPH.
TRANSPORT WINDS               NW 1-4 MPH.         S 10-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 4         GOOD.
OUTLOOK FOR SUN MAY 5         GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          623 (GOOD).
OUTLOOK FOR SAT MAY 4         1001 (GOOD).
OUTLOOK FOR SUN MAY 5         411 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-8 MPH.          E 7-14 MPH.
TRANSPORT WINDS               S 6-11 MPH.         SE 10-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT MAY 4         GOOD.
OUTLOOK FOR SUN MAY 5         GOOD.

VENTILATION INDEX (CATEGORY)  63 (POOR).          587 (FAIR).
OUTLOOK FOR SAT MAY 4         720 (GOOD).
OUTLOOK FOR SUN MAY 5         530 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM     1050 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE    701 (GOOD)
TRI-CITIES    691 (GOOD)
WALLA WALLA   428 (FAIR)
YAKIMA       1050 (GOOD)
BEND          854 (GOOD)
PRINEVILLE   1050 (GOOD)
ENTERPRISE    419 (FAIR)
HERMISTON     697 (GOOD)
JOHN DAY      837 (GOOD)
LA GRANDE     688 (GOOD)
MADRAS       1050 (GOOD)
MEACHAM       823 (GOOD)
PENDLETON     663 (GOOD)
REDMOND      1047 (GOOD)
SENECA        872 (GOOD)
THE DALLES    755 (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.
$$