010
AUUS46 KPDT 011115
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
415 AM PDT WED MAY 1 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 9-20 MPH.        SW 12-16 MPH.
TRANSPORT WINDS               SW 9-20 MPH.        W 13-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU MAY 2         FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.

VENTILATION INDEX (CATEGORY)  189 (POOR).         866 (GOOD).
OUTLOOK FOR THU MAY 2         323 (FAIR).
OUTLOOK FOR FRI MAY 3         557 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 6-11 MPH.         W 7-10 MPH.
TRANSPORT WINDS               W 6-11 MPH.         W 7-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU MAY 2         FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.

VENTILATION INDEX (CATEGORY)  110 (POOR).         565 (FAIR).
OUTLOOK FOR THU MAY 2         308 (FAIR).
OUTLOOK FOR FRI MAY 3         674 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 5-10 MPH.        NW 8-11 MPH.
TRANSPORT WINDS               W 5-10 MPH.         W 11-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 2         FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.

VENTILATION INDEX (CATEGORY)  157 (POOR).         564 (FAIR).
OUTLOOK FOR THU MAY 2         282 (POOR).
OUTLOOK FOR FRI MAY 3         637 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 11-18 MPH.       W 11-15 MPH.
TRANSPORT WINDS               SW 11-18 MPH.       W 11-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU MAY 2         FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.

VENTILATION INDEX (CATEGORY)  223 (POOR).         727 (GOOD).
OUTLOOK FOR THU MAY 2         292 (POOR).
OUTLOOK FOR FRI MAY 3         579 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      662 (GOOD)
ELLENSBURG   1038 (GOOD)
GOLDENDALE    773 (GOOD)
TRI-CITIES    810 (GOOD)
WALLA WALLA   779 (GOOD)
YAKIMA        674 (GOOD)
BEND          435 (FAIR)
PRINEVILLE    408 (FAIR)
ENTERPRISE    862 (GOOD)
HERMISTON     842 (GOOD)
JOHN DAY      482 (FAIR)
LA GRANDE     612 (GOOD)
MADRAS        365 (FAIR)
MEACHAM       515 (FAIR)
PENDLETON     776 (GOOD)
REDMOND       425 (FAIR)
SENECA        726 (GOOD)
THE DALLES    688 (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.
$$