837
AUUS46 KPDT 251225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE AUG 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 S 1-5 MPH. NW 3-7 MPH.
TRANSPORT WINDS SW 3-6 MPH. W 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 26 FAIR.
OUTLOOK FOR THU AUG 27 FAIR.
VENTILATION INDEX (CATEGORY) 30 (POOR). 186 (POOR).
OUTLOOK FOR WED AUG 26 486 (FAIR).
OUTLOOK FOR THU AUG 27 568 (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 5-9 MPH. S 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED AUG 26 GOOD.
OUTLOOK FOR THU AUG 27 GOOD.
VENTILATION INDEX (CATEGORY) 46 (POOR). 167 (POOR).
OUTLOOK FOR WED AUG 26 538 (FAIR).
OUTLOOK FOR THU AUG 27 675 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 2-5 MPH. S 9-12 MPH.
TRANSPORT WINDS SE 4-7 MPH. S 15-18 MPH.
MIXING HEIGHT NEAR SURFACE. 13500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR WED AUG 26 GOOD.
OUTLOOK FOR THU AUG 27 GOOD.
VENTILATION INDEX (CATEGORY) 66 (POOR). 1050 (GOOD).
OUTLOOK FOR WED AUG 26 867 (GOOD).
OUTLOOK FOR THU AUG 27 330 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. NW 4-8 MPH.
TRANSPORT WINDS S 5-9 MPH. SW 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 26 FAIR.
OUTLOOK FOR THU AUG 27 FAIR.
VENTILATION INDEX (CATEGORY) 35 (POOR). 297 (POOR).
OUTLOOK FOR WED AUG 26 445 (FAIR).
OUTLOOK FOR THU AUG 27 405 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 600 (FAIR)
ELLENSBURG 504 (FAIR)
GOLDENDALE 230 (POOR)
TRI-CITIES 108 (POOR)
WALLA WALLA 180 (POOR)
YAKIMA 293 (POOR)
BEND 1050 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 1050 (GOOD)
HERMISTON 178 (POOR)
JOHN DAY 1050 (GOOD)
LA GRANDE 1050 (GOOD)
MADRAS 865 (GOOD)
MEACHAM 671 (GOOD)
PENDLETON 243 (POOR)
REDMOND 1050 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 134 (POOR)
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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