928
AUUS46 KPDT 081158
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
458 AM PDT WED MAY 8 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 8-15 MPH.        W 7-11 MPH.
TRANSPORT WINDS               SW 8-15 MPH.        N 7-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU MAY 9         FAIR.
OUTLOOK FOR FRI MAY 10        POOR.

VENTILATION INDEX (CATEGORY)  114 (POOR).         355 (FAIR).
OUTLOOK FOR THU MAY 9         444 (FAIR).
OUTLOOK FOR FRI MAY 10        151 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 7-13 MPH.         N 9-11 MPH.
TRANSPORT WINDS               W 7-13 MPH.         N 11-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 9         GOOD.
OUTLOOK FOR FRI MAY 10        FAIR.

VENTILATION INDEX (CATEGORY)  106 (POOR).         680 (GOOD).
OUTLOOK FOR THU MAY 9         538 (FAIR).
OUTLOOK FOR FRI MAY 10        307 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 7-13 MPH.         NW 13-19 MPH.
TRANSPORT WINDS               W 7-13 MPH.         N 17-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 9         FAIR.
OUTLOOK FOR FRI MAY 10        GOOD.

VENTILATION INDEX (CATEGORY)  136 (POOR).         623 (GOOD).
OUTLOOK FOR THU MAY 9         441 (FAIR).
OUTLOOK FOR FRI MAY 10        129 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 9-15 MPH.        NW 4-11 MPH.
TRANSPORT WINDS               SW 9-15 MPH.        NW 6-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR THU MAY 9         FAIR.
OUTLOOK FOR FRI MAY 10        FAIR.

VENTILATION INDEX (CATEGORY)  121 (POOR).         285 (POOR).
OUTLOOK FOR THU MAY 9         375 (FAIR).
OUTLOOK FOR FRI MAY 10        198 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      435 (FAIR)
ELLENSBURG    696 (GOOD)
GOLDENDALE    402 (FAIR)
TRI-CITIES    473 (FAIR)
WALLA WALLA   200 (POOR)
YAKIMA        640 (GOOD)
BEND          720 (GOOD)
PRINEVILLE    769 (GOOD)
ENTERPRISE    589 (FAIR)
HERMISTON     370 (FAIR)
JOHN DAY      667 (GOOD)
LA GRANDE     584 (FAIR)
MADRAS        567 (FAIR)
MEACHAM       371 (FAIR)
PENDLETON     344 (FAIR)
REDMOND       705 (GOOD)
SENECA        734 (GOOD)
THE DALLES    337 (FAIR)

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.

$$