540
AUUS46 KPDT 301149
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
449 AM PDT THU MAY 30 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 6-12 MPH.        W 5-9 MPH.
TRANSPORT WINDS               SW 7-12 MPH.        W 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 31        POOR.
OUTLOOK FOR SAT JUN 1         GOOD.

VENTILATION INDEX (CATEGORY)  112 (POOR).         435 (FAIR).
OUTLOOK FOR FRI MAY 31        166 (POOR).
OUTLOOK FOR SAT JUN 1         676 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-5 MPH.          NW 3-6 MPH.
TRANSPORT WINDS               W 5-9 MPH.          NW 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 31        POOR.
OUTLOOK FOR SAT JUN 1         GOOD.

VENTILATION INDEX (CATEGORY)  65 (POOR).          432 (FAIR).
OUTLOOK FOR FRI MAY 31        191 (POOR).
OUTLOOK FOR SAT JUN 1         649 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-3 MPH.          NW 7-10 MPH.
TRANSPORT WINDS               W 6-8 MPH.          NW 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAY 31        FAIR.
OUTLOOK FOR SAT JUN 1         GOOD.

VENTILATION INDEX (CATEGORY)  126 (POOR).         525 (FAIR).
OUTLOOK FOR FRI MAY 31        205 (POOR).
OUTLOOK FOR SAT JUN 1         517 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        W 7-10 MPH.
TRANSPORT WINDS               SW 8-14 MPH.        W 8-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 31        FAIR.
OUTLOOK FOR SAT JUN 1         GOOD.

VENTILATION INDEX (CATEGORY)  146 (POOR).         438 (FAIR).
OUTLOOK FOR FRI MAY 31        221 (POOR).
OUTLOOK FOR SAT JUN 1         647 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      665 (GOOD)
ELLENSBURG    820 (GOOD)
GOLDENDALE    488 (FAIR)
TRI-CITIES    421 (FAIR)
WALLA WALLA   392 (FAIR)
YAKIMA        449 (FAIR)
BEND          409 (FAIR)
PRINEVILLE    431 (FAIR)
ENTERPRISE    551 (FAIR)
HERMISTON     347 (FAIR)
JOHN DAY      580 (FAIR)
LA GRANDE     592 (FAIR)
MADRAS        364 (FAIR)
MEACHAM       437 (FAIR)
PENDLETON     429 (FAIR)
REDMOND       396 (FAIR)
SENECA        635 (GOOD)
THE DALLES    511 (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.
$$