334
AUUS46 KPDT 061225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU AUG 6 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 2-9 MPH. W 5-10 MPH.
TRANSPORT WINDS S 6-11 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI AUG 7 GOOD.
OUTLOOK FOR SAT AUG 8 FAIR.
VENTILATION INDEX (CATEGORY) 60 (POOR). 364 (FAIR).
OUTLOOK FOR FRI AUG 7 665 (GOOD).
OUTLOOK FOR SAT AUG 8 430 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-5 MPH. SE 2-6 MPH.
TRANSPORT WINDS NW 4-8 MPH. SW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI AUG 7 FAIR.
OUTLOOK FOR SAT AUG 8 FAIR.
VENTILATION INDEX (CATEGORY) 31 (POOR). 204 (POOR).
OUTLOOK FOR FRI AUG 7 401 (FAIR).
OUTLOOK FOR SAT AUG 8 314 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 0-1 MPH. NW 4-8 MPH.
TRANSPORT WINDS W 2-5 MPH. W 10-13 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR FRI AUG 7 GOOD.
OUTLOOK FOR SAT AUG 8 GOOD.
VENTILATION INDEX (CATEGORY) 26 (POOR). 490 (FAIR).
OUTLOOK FOR FRI AUG 7 599 (FAIR).
OUTLOOK FOR SAT AUG 8 361 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 4-9 MPH. W 6-8 MPH.
TRANSPORT WINDS S 8-12 MPH. W 9-11 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI AUG 7 FAIR.
OUTLOOK FOR SAT AUG 8 FAIR.
VENTILATION INDEX (CATEGORY) 76 (POOR). 424 (FAIR).
OUTLOOK FOR FRI AUG 7 695 (GOOD).
OUTLOOK FOR SAT AUG 8 478 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 388 (FAIR)
ELLENSBURG 370 (FAIR)
GOLDENDALE 412 (FAIR)
TRI-CITIES 228 (POOR)
WALLA WALLA 422 (FAIR)
YAKIMA 217 (POOR)
BEND 758 (GOOD)
PRINEVILLE 618 (GOOD)
ENTERPRISE 708 (GOOD)
HERMISTON 355 (FAIR)
JOHN DAY 900 (GOOD)
LA GRANDE 591 (FAIR)
MADRAS 468 (FAIR)
MEACHAM 381 (FAIR)
PENDLETON 370 (FAIR)
REDMOND 595 (FAIR)
SENECA 952 (GOOD)
THE DALLES 410 (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.
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