089
AUUS46 KPDT 251225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT JUL 25 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 9-19 MPH. W 14-19 MPH.
TRANSPORT WINDS SW 11-20 MPH. W 16-23 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SUN JUL 26 FAIR.
OUTLOOK FOR MON JUL 27 FAIR.
VENTILATION INDEX (CATEGORY) 167 (POOR). 751 (GOOD).
OUTLOOK FOR SUN JUL 26 431 (FAIR).
OUTLOOK FOR MON JUL 27 421 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-9 MPH. SW 19-26 MPH.
TRANSPORT WINDS W 4-8 MPH. SW 25-28 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN JUL 26 GOOD.
OUTLOOK FOR MON JUL 27 FAIR.
VENTILATION INDEX (CATEGORY) 104 (POOR). 1050 (GOOD).
OUTLOOK FOR SUN JUL 26 571 (FAIR).
OUTLOOK FOR MON JUL 27 407 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 1-3 MPH. NW 8-10 MPH.
TRANSPORT WINDS W 4-8 MPH. SW 15-18 MPH.
MIXING HEIGHT NEAR SURFACE. 11000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN JUL 26 GOOD.
OUTLOOK FOR MON JUL 27 GOOD.
VENTILATION INDEX (CATEGORY) 48 (POOR). 678 (GOOD).
OUTLOOK FOR SUN JUL 26 464 (FAIR).
OUTLOOK FOR MON JUL 27 354 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 5-17 MPH. W 11-16 MPH.
TRANSPORT WINDS SW 10-17 MPH. W 13-19 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SUN JUL 26 FAIR.
OUTLOOK FOR MON JUL 27 FAIR.
VENTILATION INDEX (CATEGORY) 140 (POOR). 528 (FAIR).
OUTLOOK FOR SUN JUL 26 347 (FAIR).
OUTLOOK FOR MON JUL 27 352 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 676 (GOOD)
ELLENSBURG 1050 (GOOD)
GOLDENDALE 883 (GOOD)
TRI-CITIES 1050 (GOOD)
WALLA WALLA 562 (FAIR)
YAKIMA 1050 (GOOD)
BEND 1050 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 1050 (GOOD)
HERMISTON 750 (GOOD)
JOHN DAY 1050 (GOOD)
LA GRANDE 693 (GOOD)
MADRAS 1028 (GOOD)
MEACHAM 396 (FAIR)
PENDLETON 598 (FAIR)
REDMOND 1050 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 778 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page