083
AUUS46 KPDT 091215
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
515 AM PDT THU MAY 9 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 3-6 MPH.          NE 13-18 MPH.
TRANSPORT WINDS               E 3-7 MPH.          NE 15-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 10        POOR.
OUTLOOK FOR SAT MAY 11        GOOD.

VENTILATION INDEX (CATEGORY)  42 (POOR).          620 (GOOD).
OUTLOOK FOR FRI MAY 10        145 (POOR).
OUTLOOK FOR SAT MAY 11        458 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         NE 13-15 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         NE 15-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAY 10        FAIR.
OUTLOOK FOR SAT MAY 11        FAIR.

VENTILATION INDEX (CATEGORY)  48 (POOR).          730 (GOOD).
OUTLOOK FOR FRI MAY 10        324 (FAIR).
OUTLOOK FOR SAT MAY 11        346 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 5-9 MPH.          N 11-14 MPH.
TRANSPORT WINDS               N 8-12 MPH.         NE 14-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 10        POOR.
OUTLOOK FOR SAT MAY 11        GOOD.

VENTILATION INDEX (CATEGORY)  129 (POOR).         629 (GOOD).
OUTLOOK FOR FRI MAY 10        212 (POOR).
OUTLOOK FOR SAT MAY 11        555 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 1-5 MPH.          N 10-15 MPH.
TRANSPORT WINDS               E 5-11 MPH.         NE 13-19 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 10        POOR.
OUTLOOK FOR SAT MAY 11        GOOD.

VENTILATION INDEX (CATEGORY)  60 (POOR).          488 (FAIR).
OUTLOOK FOR FRI MAY 10        132 (POOR).
OUTLOOK FOR SAT MAY 11        519 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      780 (GOOD)
ELLENSBURG    833 (GOOD)
GOLDENDALE    945 (GOOD)
TRI-CITIES    725 (GOOD)
WALLA WALLA   462 (FAIR)
YAKIMA        853 (GOOD)
BEND          620 (GOOD)
PRINEVILLE    648 (GOOD)
ENTERPRISE    529 (FAIR)
HERMISTON     670 (GOOD)
JOHN DAY      506 (FAIR)
LA GRANDE     566 (FAIR)
MADRAS        897 (GOOD)
MEACHAM       456 (FAIR)
PENDLETON     501 (FAIR)
REDMOND       709 (GOOD)
SENECA        659 (GOOD)
THE DALLES    799 (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.
$$