050
AUUS46 KPDT 091225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI OCT 9 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 7-20 MPH. W 18-26 MPH.
TRANSPORT WINDS SW 10-21 MPH. W 22-27 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
OUTLOOK FOR SUN OCT 11 FAIR.
VENTILATION INDEX (CATEGORY) 131 (POOR). 754 (GOOD).
OUTLOOK FOR SAT OCT 10 321 (FAIR).
OUTLOOK FOR SUN OCT 11 501 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 1-11 MPH. W 15-21 MPH.
TRANSPORT WINDS W 5-10 MPH. W 21-23 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
OUTLOOK FOR SUN OCT 11 GOOD.
VENTILATION INDEX (CATEGORY) 56 (POOR). 786 (GOOD).
OUTLOOK FOR SAT OCT 10 306 (FAIR).
OUTLOOK FOR SUN OCT 11 886 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 2-5 MPH. NW 12-15 MPH.
TRANSPORT WINDS SW 5-9 MPH. W 17-20 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
OUTLOOK FOR SUN OCT 11 FAIR.
VENTILATION INDEX (CATEGORY) 48 (POOR). 587 (FAIR).
OUTLOOK FOR SAT OCT 10 412 (FAIR).
OUTLOOK FOR SUN OCT 11 324 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 8-18 MPH. W 18-25 MPH.
TRANSPORT WINDS SW 12-21 MPH. W 23-26 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
OUTLOOK FOR SUN OCT 11 FAIR.
VENTILATION INDEX (CATEGORY) 157 (POOR). 841 (GOOD).
OUTLOOK FOR SAT OCT 10 358 (FAIR).
OUTLOOK FOR SUN OCT 11 258 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 704 (GOOD)
ELLENSBURG 842 (GOOD)
GOLDENDALE 714 (GOOD)
TRI-CITIES 679 (GOOD)
WALLA WALLA 891 (GOOD)
YAKIMA 740 (GOOD)
BEND 415 (FAIR)
PRINEVILLE 551 (FAIR)
ENTERPRISE 617 (GOOD)
HERMISTON 796 (GOOD)
JOHN DAY 634 (GOOD)
LA GRANDE 630 (GOOD)
MADRAS 479 (FAIR)
MEACHAM 642 (GOOD)
PENDLETON 870 (GOOD)
REDMOND 526 (FAIR)
SENECA 808 (GOOD)
THE DALLES 792 (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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