710
AUUS46 KPDT 291225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN MAR 29 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 5-10 MPH. W 12-20 MPH.
TRANSPORT WINDS SW 6-11 MPH. W 16-26 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON MAR 30 FAIR.
OUTLOOK FOR TUE MAR 31 POOR.
VENTILATION INDEX (CATEGORY) 55 (POOR). 488 (FAIR).
OUTLOOK FOR MON MAR 30 320 (FAIR).
OUTLOOK FOR TUE MAR 31 113 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. W 12-17 MPH.
TRANSPORT WINDS NW 3-6 MPH. W 18-25 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON MAR 30 POOR.
OUTLOOK FOR TUE MAR 31 POOR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 637 (GOOD).
OUTLOOK FOR MON MAR 30 305 (FAIR).
OUTLOOK FOR TUE MAR 31 113 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 2-2 MPH. W 9-13 MPH.
TRANSPORT WINDS S 3-6 MPH. W 18-22 MPH.
MIXING HEIGHT 4000 FT MSL. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON MAR 30 GOOD.
OUTLOOK FOR TUE MAR 31 FAIR.
VENTILATION INDEX (CATEGORY) 67 (POOR). 767 (GOOD).
OUTLOOK FOR MON MAR 30 505 (FAIR).
OUTLOOK FOR TUE MAR 31 399 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-10 MPH. W 10-19 MPH.
TRANSPORT WINDS S 7-13 MPH. W 11-23 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON MAR 30 FAIR.
OUTLOOK FOR TUE MAR 31 FAIR.
VENTILATION INDEX (CATEGORY) 74 (POOR). 357 (FAIR).
OUTLOOK FOR MON MAR 30 369 (FAIR).
OUTLOOK FOR TUE MAR 31 127 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 539 (FAIR)
ELLENSBURG 504 (FAIR)
GOLDENDALE 740 (GOOD)
TRI-CITIES 657 (GOOD)
WALLA WALLA 373 (FAIR)
YAKIMA 505 (FAIR)
BEND 1050 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 823 (GOOD)
HERMISTON 527 (FAIR)
JOHN DAY 1050 (GOOD)
LA GRANDE 937 (GOOD)
MADRAS 1050 (GOOD)
MEACHAM 272 (POOR)
PENDLETON 381 (FAIR)
REDMOND 1050 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 663 (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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