604
AUUS46 KPDT 081225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN MAR 8 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 14-28 MPH. SW 25-37 MPH.
TRANSPORT WINDS SW 17-29 MPH. W 33-42 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON MAR 9 GOOD.
OUTLOOK FOR TUE MAR 10 GOOD.
VENTILATION INDEX (CATEGORY) 255 (POOR). 1038 (GOOD).
OUTLOOK FOR MON MAR 9 915 (GOOD).
OUTLOOK FOR TUE MAR 10 794 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS SW 8-18 MPH. W 18-26 MPH.
TRANSPORT WINDS SW 12-21 MPH. W 28-34 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR MON MAR 9 GOOD.
OUTLOOK FOR TUE MAR 10 GOOD.
VENTILATION INDEX (CATEGORY) 142 (POOR). 1035 (GOOD).
OUTLOOK FOR MON MAR 9 1045 (GOOD).
OUTLOOK FOR TUE MAR 10 760 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 5-9 MPH. W 16-21 MPH.
TRANSPORT WINDS S 8-14 MPH. W 20-26 MPH.
MIXING HEIGHT 4000 FT MSL. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON MAR 9 GOOD.
OUTLOOK FOR TUE MAR 10 GOOD.
VENTILATION INDEX (CATEGORY) 136 (POOR). 943 (GOOD).
OUTLOOK FOR MON MAR 9 1050 (GOOD).
OUTLOOK FOR TUE MAR 10 948 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 9-31 MPH. W 23-40 MPH.
TRANSPORT WINDS SW 14-31 MPH. W 27-40 MPH.
MIXING HEIGHT 2000 FT MSL. 5500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON MAR 9 GOOD.
OUTLOOK FOR TUE MAR 10 GOOD.
VENTILATION INDEX (CATEGORY) 252 (POOR). 1036 (GOOD).
OUTLOOK FOR MON MAR 9 1009 (GOOD).
OUTLOOK FOR TUE MAR 10 841 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 1050 (GOOD)
ELLENSBURG 1050 (GOOD)
GOLDENDALE 985 (GOOD)
TRI-CITIES 1040 (GOOD)
WALLA WALLA 964 (GOOD)
YAKIMA 949 (GOOD)
BEND 509 (FAIR)
PRINEVILLE 487 (FAIR)
ENTERPRISE 1050 (GOOD)
HERMISTON 1050 (GOOD)
JOHN DAY 756 (GOOD)
LA GRANDE 1050 (GOOD)
MADRAS 593 (FAIR)
MEACHAM 980 (GOOD)
PENDLETON 1050 (GOOD)
REDMOND 463 (FAIR)
SENECA 904 (GOOD)
THE DALLES 725 (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:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
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