580
AUUS46 KPDT 171325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST SAT JAN 17 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS N 1-3 MPH. N 2-5 MPH.
TRANSPORT WINDS N 2-5 MPH. N 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN JAN 18 POOR.
OUTLOOK FOR MON JAN 19 POOR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 54 (POOR).
OUTLOOK FOR SUN JAN 18 51 (POOR).
OUTLOOK FOR MON JAN 19 44 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS N 1-3 MPH. SE 1-3 MPH.
TRANSPORT WINDS NE 2-5 MPH. N 1-3 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN JAN 18 POOR.
OUTLOOK FOR MON JAN 19 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 35 (POOR).
OUTLOOK FOR SUN JAN 18 38 (POOR).
OUTLOOK FOR MON JAN 19 31 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 1-3 MPH. S 4-9 MPH.
TRANSPORT WINDS SE 2-5 MPH. S 8-14 MPH.
MIXING HEIGHT 4000 FT MSL. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN JAN 18 POOR.
OUTLOOK FOR MON JAN 19 POOR.
VENTILATION INDEX (CATEGORY) 43 (POOR). 118 (POOR).
OUTLOOK FOR SUN JAN 18 28 (POOR).
OUTLOOK FOR MON JAN 19 101 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS N 1-3 MPH. N 1-4 MPH.
TRANSPORT WINDS NE 2-5 MPH. N 2-5 MPH.
MIXING HEIGHT NEAR SURFACE. NEAR SURFACE.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN JAN 18 POOR.
OUTLOOK FOR MON JAN 19 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 34 (POOR).
OUTLOOK FOR SUN JAN 18 33 (POOR).
OUTLOOK FOR MON JAN 19 33 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 140 (POOR)
ELLENSBURG 31 (POOR)
GOLDENDALE 91 (POOR)
TRI-CITIES 66 (POOR)
WALLA WALLA 28 (POOR)
YAKIMA 25 (POOR)
BEND 31 (POOR)
PRINEVILLE 75 (POOR)
ENTERPRISE 25 (POOR)
HERMISTON 63 (POOR)
JOHN DAY 113 (POOR)
LA GRANDE 131 (POOR)
MADRAS 29 (POOR)
MEACHAM 32 (POOR)
PENDLETON 53 (POOR)
REDMOND 41 (POOR)
SENECA 120 (POOR)
THE DALLES 210 (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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