708
AUUS46 KPDT 231058
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
358 AM PDT THU MAY 23 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 8-16 MPH.        SW 9-13 MPH.
TRANSPORT WINDS               SW 8-16 MPH.        SW 9-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR FRI MAY 24        FAIR.
OUTLOOK FOR SAT MAY 25        GOOD.

VENTILATION INDEX (CATEGORY)  154 (POOR).         536 (FAIR).
OUTLOOK FOR FRI MAY 24        372 (FAIR).
OUTLOOK FOR SAT MAY 25        902 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          S 5-9 MPH.
TRANSPORT WINDS               W 3-7 MPH.          SW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 24        FAIR.
OUTLOOK FOR SAT MAY 25        GOOD.

VENTILATION INDEX (CATEGORY)  89 (POOR).          385 (FAIR).
OUTLOOK FOR FRI MAY 24        315 (FAIR).
OUTLOOK FOR SAT MAY 25        674 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         W 3-6 MPH.
TRANSPORT WINDS               W 8-11 MPH.         W 5-6 MPH.
MIXING HEIGHT                 4500 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 24        GOOD.
OUTLOOK FOR SAT MAY 25        GOOD.

VENTILATION INDEX (CATEGORY)  197 (POOR).         251 (POOR).
OUTLOOK FOR FRI MAY 24        408 (FAIR).
OUTLOOK FOR SAT MAY 25        573 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 7-12 MPH.        SW 5-10 MPH.
TRANSPORT WINDS               SW 7-12 MPH.        SW 7-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR FRI MAY 24        FAIR.
OUTLOOK FOR SAT MAY 25        GOOD.

VENTILATION INDEX (CATEGORY)  187 (POOR).         386 (FAIR).
OUTLOOK FOR FRI MAY 24        313 (FAIR).
OUTLOOK FOR SAT MAY 25        813 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      617 (GOOD)
ELLENSBURG    685 (GOOD)
GOLDENDALE    570 (FAIR)
TRI-CITIES    547 (FAIR)
WALLA WALLA   442 (FAIR)
YAKIMA        401 (FAIR)
BEND          281 (POOR)
PRINEVILLE    233 (POOR)
ENTERPRISE    268 (POOR)
HERMISTON     516 (FAIR)
JOHN DAY      240 (POOR)
LA GRANDE     282 (POOR)
MADRAS        216 (POOR)
MEACHAM       188 (POOR)
PENDLETON     423 (FAIR)
REDMOND       236 (POOR)
SENECA        335 (FAIR)
THE DALLES    635 (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.
$$