908
AUUS46 KPDT 061208
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
408 AM PST THU MAR 6 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 5-10 MPH.        NW 8-16 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        NW 10-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAR 7         FAIR.
OUTLOOK FOR SAT MAR 8         POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          324 (FAIR).
OUTLOOK FOR FRI MAR 7         328 (FAIR).
OUTLOOK FOR SAT MAR 8         139 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 5-10 MPH.        NW 7-14 MPH.
TRANSPORT WINDS               NW 6-12 MPH.        NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAR 7         POOR.
OUTLOOK FOR SAT MAR 8         POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          531 (FAIR).
OUTLOOK FOR FRI MAR 7         75 (POOR).
OUTLOOK FOR SAT MAR 8         77 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 10-20 MPH.       NW 20-30 MPH.
TRANSPORT WINDS               NW 10-20 MPH.       NW 25-35 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAR 7         FAIR.
OUTLOOK FOR SAT MAR 8         FAIR.

VENTILATION INDEX (CATEGORY)  44 (POOR).          589 (FAIR).
OUTLOOK FOR FRI MAR 7         202 (POOR).
OUTLOOK FOR SAT MAR 8         254 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          NW 8-14 MPH.
TRANSPORT WINDS               W 3-7 MPH.          NW 10-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAR 7         FAIR.
OUTLOOK FOR SAT MAR 8         FAIR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          258 (POOR).
OUTLOOK FOR FRI MAR 7         331 (FAIR).
OUTLOOK FOR SAT MAR 8         229 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      298 (POOR)
ELLENSBURG    396 (FAIR)
GOLDENDALE    410 (FAIR)
TRI-CITIES    406 (FAIR)
WALLA WALLA   133 (POOR)
YAKIMA        390 (FAIR)
BEND          550 (FAIR)
PRINEVILLE    714 (GOOD)
ENTERPRISE    642 (GOOD)
HERMISTON     423 (FAIR)
JOHN DAY      806 (GOOD)
LA GRANDE     534 (FAIR)
MADRAS        513 (FAIR)
MEACHAM       348 (FAIR)
PENDLETON     344 (FAIR)
REDMOND       637 (GOOD)
SENECA        804 (GOOD)
THE DALLES    253 (POOR)

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:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$