813
AUUS46 KPDT 171225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED JUN 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 SW 6-14 MPH. W 6-11 MPH.
TRANSPORT WINDS SW 8-15 MPH. NW 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUN 18 FAIR.
OUTLOOK FOR FRI JUN 19 FAIR.
VENTILATION INDEX (CATEGORY) 168 (POOR). 558 (FAIR).
OUTLOOK FOR THU JUN 18 314 (FAIR).
OUTLOOK FOR FRI JUN 19 351 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 4-10 MPH. NW 5-9 MPH.
TRANSPORT WINDS NW 5-11 MPH. NW 9-13 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUN 18 POOR.
OUTLOOK FOR FRI JUN 19 FAIR.
VENTILATION INDEX (CATEGORY) 112 (POOR). 573 (FAIR).
OUTLOOK FOR THU JUN 18 332 (FAIR).
OUTLOOK FOR FRI JUN 19 255 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 1-3 MPH. NW 10-14 MPH.
TRANSPORT WINDS W 6-9 MPH. NW 14-17 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU JUN 18 FAIR.
OUTLOOK FOR FRI JUN 19 GOOD.
VENTILATION INDEX (CATEGORY) 136 (POOR). 652 (GOOD).
OUTLOOK FOR THU JUN 18 304 (FAIR).
OUTLOOK FOR FRI JUN 19 313 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 6-15 MPH. NW 8-11 MPH.
TRANSPORT WINDS SW 8-15 MPH. W 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUN 18 FAIR.
OUTLOOK FOR FRI JUN 19 FAIR.
VENTILATION INDEX (CATEGORY) 173 (POOR). 548 (FAIR).
OUTLOOK FOR THU JUN 18 313 (FAIR).
OUTLOOK FOR FRI JUN 19 354 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 643 (GOOD)
ELLENSBURG 1050 (GOOD)
GOLDENDALE 539 (FAIR)
TRI-CITIES 618 (GOOD)
WALLA WALLA 489 (FAIR)
YAKIMA 750 (GOOD)
BEND 484 (FAIR)
PRINEVILLE 528 (FAIR)
ENTERPRISE 780 (GOOD)
HERMISTON 458 (FAIR)
JOHN DAY 689 (GOOD)
LA GRANDE 688 (GOOD)
MADRAS 516 (FAIR)
MEACHAM 528 (FAIR)
PENDLETON 550 (FAIR)
REDMOND 504 (FAIR)
SENECA 794 (GOOD)
THE DALLES 545 (FAIR)
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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