473
AUUS46 KPDT 191225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI JUN 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 2-6 MPH. N 5-9 MPH.
TRANSPORT WINDS NE 3-7 MPH. N 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUN 20 GOOD.
OUTLOOK FOR SUN JUN 21 FAIR.
VENTILATION INDEX (CATEGORY) 45 (POOR). 342 (FAIR).
OUTLOOK FOR SAT JUN 20 908 (GOOD).
OUTLOOK FOR SUN JUN 21 450 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. SE 3-7 MPH.
TRANSPORT WINDS NW 4-8 MPH. SW 4-9 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT JUN 20 FAIR.
OUTLOOK FOR SUN JUN 21 FAIR.
VENTILATION INDEX (CATEGORY) 65 (POOR). 233 (POOR).
OUTLOOK FOR SAT JUN 20 583 (FAIR).
OUTLOOK FOR SUN JUN 21 397 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 0-1 MPH. N 4-7 MPH.
TRANSPORT WINDS N 3-6 MPH. NW 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUN 20 GOOD.
OUTLOOK FOR SUN JUN 21 GOOD.
VENTILATION INDEX (CATEGORY) 34 (POOR). 251 (POOR).
OUTLOOK FOR SAT JUN 20 852 (GOOD).
OUTLOOK FOR SUN JUN 21 472 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 2-6 MPH. N 5-9 MPH.
TRANSPORT WINDS SE 5-9 MPH. NW 6-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUN 20 GOOD.
OUTLOOK FOR SUN JUN 21 FAIR.
VENTILATION INDEX (CATEGORY) 44 (POOR). 280 (POOR).
OUTLOOK FOR SAT JUN 20 923 (GOOD).
OUTLOOK FOR SUN JUN 21 425 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 343 (FAIR)
ELLENSBURG 449 (FAIR)
GOLDENDALE 229 (POOR)
TRI-CITIES 383 (FAIR)
WALLA WALLA 195 (POOR)
YAKIMA 324 (FAIR)
BEND 613 (GOOD)
PRINEVILLE 536 (FAIR)
ENTERPRISE 316 (FAIR)
HERMISTON 304 (FAIR)
JOHN DAY 765 (GOOD)
LA GRANDE 296 (POOR)
MADRAS 396 (FAIR)
MEACHAM 285 (POOR)
PENDLETON 343 (FAIR)
REDMOND 551 (FAIR)
SENECA 1050 (GOOD)
THE DALLES 208 (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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