111
AUUS46 KPDT 151225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU OCT 15 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 1-5 MPH. N 4-8 MPH.
TRANSPORT WINDS NE 3-6 MPH. NE 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 16 POOR.
OUTLOOK FOR SAT OCT 17 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 91 (POOR).
OUTLOOK FOR FRI OCT 16 72 (POOR).
OUTLOOK FOR SAT OCT 17 539 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. E 3-7 MPH.
TRANSPORT WINDS N 3-6 MPH. E 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 16 POOR.
OUTLOOK FOR SAT OCT 17 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 139 (POOR).
OUTLOOK FOR FRI OCT 16 81 (POOR).
OUTLOOK FOR SAT OCT 17 497 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 0-2 MPH. S 0-6 MPH.
TRANSPORT WINDS NE 3-7 MPH. S 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI OCT 16 GOOD.
OUTLOOK FOR SAT OCT 17 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 138 (POOR).
OUTLOOK FOR FRI OCT 16 568 (FAIR).
OUTLOOK FOR SAT OCT 17 299 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-7 MPH. N 2-6 MPH.
TRANSPORT WINDS SE 5-10 MPH. E 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 16 POOR.
OUTLOOK FOR SAT OCT 17 GOOD.
VENTILATION INDEX (CATEGORY) 28 (POOR). 75 (POOR).
OUTLOOK FOR FRI OCT 16 142 (POOR).
OUTLOOK FOR SAT OCT 17 599 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 379 (FAIR)
ELLENSBURG 260 (POOR)
GOLDENDALE 312 (FAIR)
TRI-CITIES 109 (POOR)
WALLA WALLA 33 (POOR)
YAKIMA 148 (POOR)
BEND 370 (FAIR)
PRINEVILLE 457 (FAIR)
ENTERPRISE 116 (POOR)
HERMISTON 113 (POOR)
JOHN DAY 212 (POOR)
LA GRANDE 150 (POOR)
MADRAS 163 (POOR)
MEACHAM 166 (POOR)
PENDLETON 85 (POOR)
REDMOND 458 (FAIR)
SENECA 277 (POOR)
THE DALLES 372 (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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