099
AUUS46 KPDT 201225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT JUN 20 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 14-27 MPH. SW 14-23 MPH.
TRANSPORT WINDS SW 15-26 MPH. W 16-24 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR SUN JUN 21 FAIR.
OUTLOOK FOR MON JUN 22 GOOD.
VENTILATION INDEX (CATEGORY) 299 (POOR). 910 (GOOD).
OUTLOOK FOR SUN JUN 21 541 (FAIR).
OUTLOOK FOR MON JUN 22 676 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 5-10 MPH. NW 6-11 MPH.
TRANSPORT WINDS W 6-11 MPH. W 10-15 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN JUN 21 FAIR.
OUTLOOK FOR MON JUN 22 FAIR.
VENTILATION INDEX (CATEGORY) 131 (POOR). 611 (GOOD).
OUTLOOK FOR SUN JUN 21 481 (FAIR).
OUTLOOK FOR MON JUN 22 624 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. NW 10-13 MPH.
TRANSPORT WINDS W 6-11 MPH. W 15-18 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN JUN 21 GOOD.
OUTLOOK FOR MON JUN 22 GOOD.
VENTILATION INDEX (CATEGORY) 151 (POOR). 745 (GOOD).
OUTLOOK FOR SUN JUN 21 571 (FAIR).
OUTLOOK FOR MON JUN 22 653 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 12-25 MPH. W 15-21 MPH.
TRANSPORT WINDS SW 14-23 MPH. W 18-21 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR SUN JUN 21 FAIR.
OUTLOOK FOR MON JUN 22 FAIR.
VENTILATION INDEX (CATEGORY) 315 (FAIR). 896 (GOOD).
OUTLOOK FOR SUN JUN 21 509 (FAIR).
OUTLOOK FOR MON JUN 22 646 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 649 (GOOD)
ELLENSBURG 1050 (GOOD)
GOLDENDALE 668 (GOOD)
TRI-CITIES 783 (GOOD)
WALLA WALLA 835 (GOOD)
YAKIMA 772 (GOOD)
BEND 558 (FAIR)
PRINEVILLE 780 (GOOD)
ENTERPRISE 766 (GOOD)
HERMISTON 821 (GOOD)
JOHN DAY 868 (GOOD)
LA GRANDE 849 (GOOD)
MADRAS 596 (FAIR)
MEACHAM 808 (GOOD)
PENDLETON 970 (GOOD)
REDMOND 787 (GOOD)
SENECA 970 (GOOD)
THE DALLES 707 (GOOD)
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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