393
AUUS46 KPDT 071225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI AUG 7 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 4-12 MPH. W 10-17 MPH.
TRANSPORT WINDS SW 8-14 MPH. W 13-17 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT AUG 8 GOOD.
OUTLOOK FOR SUN AUG 9 FAIR.
VENTILATION INDEX (CATEGORY) 108 (POOR). 641 (GOOD).
OUTLOOK FOR SAT AUG 8 568 (FAIR).
OUTLOOK FOR SUN AUG 9 346 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 1-7 MPH. NW 2-6 MPH.
TRANSPORT WINDS NW 5-10 MPH. W 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT AUG 8 FAIR.
OUTLOOK FOR SUN AUG 9 POOR.
VENTILATION INDEX (CATEGORY) 42 (POOR). 324 (FAIR).
OUTLOOK FOR SAT AUG 8 479 (FAIR).
OUTLOOK FOR SUN AUG 9 198 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 0-2 MPH. NW 6-8 MPH.
TRANSPORT WINDS NW 3-6 MPH. W 11-14 MPH.
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT AUG 8 GOOD.
OUTLOOK FOR SUN AUG 9 GOOD.
VENTILATION INDEX (CATEGORY) 32 (POOR). 545 (FAIR).
OUTLOOK FOR SAT AUG 8 555 (FAIR).
OUTLOOK FOR SUN AUG 9 237 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 4-11 MPH. W 10-15 MPH.
TRANSPORT WINDS S 9-14 MPH. W 14-19 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT AUG 8 FAIR.
OUTLOOK FOR SUN AUG 9 FAIR.
VENTILATION INDEX (CATEGORY) 120 (POOR). 656 (GOOD).
OUTLOOK FOR SAT AUG 8 663 (GOOD).
OUTLOOK FOR SUN AUG 9 331 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 486 (FAIR)
ELLENSBURG 807 (GOOD)
GOLDENDALE 537 (FAIR)
TRI-CITIES 451 (FAIR)
WALLA WALLA 722 (GOOD)
YAKIMA 362 (FAIR)
BEND 567 (FAIR)
PRINEVILLE 529 (FAIR)
ENTERPRISE 684 (GOOD)
HERMISTON 680 (GOOD)
JOHN DAY 798 (GOOD)
LA GRANDE 624 (GOOD)
MADRAS 422 (FAIR)
MEACHAM 454 (FAIR)
PENDLETON 712 (GOOD)
REDMOND 561 (FAIR)
SENECA 959 (GOOD)
THE DALLES 535 (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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