000
AUUS46 KPDT 231325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST FRI JAN 23 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. N 4-8 MPH.
TRANSPORT WINDS NW 2-5 MPH. N 4-9 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT JAN 24 POOR.
OUTLOOK FOR SUN JAN 25 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 116 (POOR).
OUTLOOK FOR SAT JAN 24 41 (POOR).
OUTLOOK FOR SUN JAN 25 38 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 3-6 MPH. NE 3-7 MPH.
TRANSPORT WINDS NW 4-8 MPH. NE 6-12 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT JAN 24 POOR.
OUTLOOK FOR SUN JAN 25 POOR.
VENTILATION INDEX (CATEGORY) 40 (POOR). 177 (POOR).
OUTLOOK FOR SAT JAN 24 26 (POOR).
OUTLOOK FOR SUN JAN 25 30 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 3-6 MPH. N 10-17 MPH.
TRANSPORT WINDS NW 6-8 MPH. N 13-17 MPH.
MIXING HEIGHT 4000 FT MSL. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JAN 24 FAIR.
OUTLOOK FOR SUN JAN 25 FAIR.
VENTILATION INDEX (CATEGORY) 99 (POOR). 359 (FAIR).
OUTLOOK FOR SAT JAN 24 109 (POOR).
OUTLOOK FOR SUN JAN 25 144 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. N 3-6 MPH.
TRANSPORT WINDS NW 2-5 MPH. N 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT JAN 24 POOR.
OUTLOOK FOR SUN JAN 25 POOR.
VENTILATION INDEX (CATEGORY) 31 (POOR). 96 (POOR).
OUTLOOK FOR SAT JAN 24 55 (POOR).
OUTLOOK FOR SUN JAN 25 39 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 171 (POOR)
ELLENSBURG 57 (POOR)
GOLDENDALE 214 (POOR)
TRI-CITIES 206 (POOR)
WALLA WALLA 58 (POOR)
YAKIMA 151 (POOR)
BEND 161 (POOR)
PRINEVILLE 173 (POOR)
ENTERPRISE 164 (POOR)
HERMISTON 111 (POOR)
JOHN DAY 200 (POOR)
LA GRANDE 360 (FAIR)
MADRAS 273 (POOR)
MEACHAM 97 (POOR)
PENDLETON 105 (POOR)
REDMOND 207 (POOR)
SENECA 258 (POOR)
THE DALLES 191 (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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