195
AUUS46 KPDT 191325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST MON JAN 19 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 NE 1-3 MPH. NE 2-5 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE JAN 20 POOR.
OUTLOOK FOR WED JAN 21 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 49 (POOR).
OUTLOOK FOR TUE JAN 20 72 (POOR).
OUTLOOK FOR WED JAN 21 55 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-3 MPH. SE 2-2 MPH.
TRANSPORT WINDS SE 1-3 MPH. SE 1-3 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE JAN 20 POOR.
OUTLOOK FOR WED JAN 21 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 33 (POOR).
OUTLOOK FOR TUE JAN 20 58 (POOR).
OUTLOOK FOR WED JAN 21 40 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 1-3 MPH. S 4-8 MPH.
TRANSPORT WINDS N 4-9 MPH. S 5-9 MPH.
MIXING HEIGHT 4000 FT MSL. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE JAN 20 POOR.
OUTLOOK FOR WED JAN 21 FAIR.
VENTILATION INDEX (CATEGORY) 39 (POOR). 80 (POOR).
OUTLOOK FOR TUE JAN 20 86 (POOR).
OUTLOOK FOR WED JAN 21 128 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS N 1-3 MPH. NW 1-3 MPH.
TRANSPORT WINDS NE 2-5 MPH. N 2-4 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE JAN 20 POOR.
OUTLOOK FOR WED JAN 21 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 35 (POOR).
OUTLOOK FOR TUE JAN 20 35 (POOR).
OUTLOOK FOR WED JAN 21 37 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 103 (POOR)
ELLENSBURG 40 (POOR)
GOLDENDALE 73 (POOR)
TRI-CITIES 46 (POOR)
WALLA WALLA 37 (POOR)
YAKIMA 32 (POOR)
BEND 27 (POOR)
PRINEVILLE 34 (POOR)
ENTERPRISE 25 (POOR)
HERMISTON 47 (POOR)
JOHN DAY 95 (POOR)
LA GRANDE 86 (POOR)
MADRAS 25 (POOR)
MEACHAM 27 (POOR)
PENDLETON 56 (POOR)
REDMOND 30 (POOR)
SENECA 89 (POOR)
THE DALLES 198 (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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