429
AUUS46 KPDT 031225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU SEP 3 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 3-10 MPH. W 3-6 MPH.
TRANSPORT WINDS SW 7-12 MPH. SW 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI SEP 4 POOR.
OUTLOOK FOR SAT SEP 5 POOR.
VENTILATION INDEX (CATEGORY) 123 (POOR). 529 (FAIR).
OUTLOOK FOR FRI SEP 4 312 (FAIR).
OUTLOOK FOR SAT SEP 5 199 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS SE 0-6 MPH. SW 5-10 MPH.
TRANSPORT WINDS SW 5-11 MPH. SW 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI SEP 4 POOR.
OUTLOOK FOR SAT SEP 5 POOR.
VENTILATION INDEX (CATEGORY) 95 (POOR). 570 (FAIR).
OUTLOOK FOR FRI SEP 4 291 (POOR).
OUTLOOK FOR SAT SEP 5 247 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SW 2-5 MPH. S 4-6 MPH.
TRANSPORT WINDS SW 6-8 MPH. S 9-12 MPH.
MIXING HEIGHT 4000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI SEP 4 FAIR.
OUTLOOK FOR SAT SEP 5 FAIR.
VENTILATION INDEX (CATEGORY) 99 (POOR). 378 (FAIR).
OUTLOOK FOR FRI SEP 4 315 (FAIR).
OUTLOOK FOR SAT SEP 5 244 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-8 MPH. NW 2-5 MPH.
TRANSPORT WINDS SW 7-14 MPH. SW 7-10 MPH.
MIXING HEIGHT 2000 FT MSL. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI SEP 4 FAIR.
OUTLOOK FOR SAT SEP 5 FAIR.
VENTILATION INDEX (CATEGORY) 155 (POOR). 415 (FAIR).
OUTLOOK FOR FRI SEP 4 299 (POOR).
OUTLOOK FOR SAT SEP 5 211 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 172 (POOR)
ELLENSBURG 330 (FAIR)
GOLDENDALE 446 (FAIR)
TRI-CITIES 753 (GOOD)
WALLA WALLA 382 (FAIR)
YAKIMA 518 (FAIR)
BEND 939 (GOOD)
PRINEVILLE 868 (GOOD)
ENTERPRISE 197 (POOR)
HERMISTON 552 (FAIR)
JOHN DAY 342 (FAIR)
LA GRANDE 304 (FAIR)
MADRAS 607 (GOOD)
MEACHAM 492 (FAIR)
PENDLETON 417 (FAIR)
REDMOND 734 (GOOD)
SENECA 315 (FAIR)
THE DALLES 326 (FAIR)
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