570
AUUS46 KPDT 221225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON JUN 22 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS NW 3-8 MPH. N 5-10 MPH.
TRANSPORT WINDS W 4-9 MPH. N 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE JUN 23 FAIR.
OUTLOOK FOR WED JUN 24 GOOD.
VENTILATION INDEX (CATEGORY) 61 (POOR). 606 (GOOD).
OUTLOOK FOR TUE JUN 23 787 (GOOD).
OUTLOOK FOR WED JUN 24 534 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 3-7 MPH. E 3-6 MPH.
TRANSPORT WINDS NW 6-11 MPH. NE 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE JUN 23 FAIR.
OUTLOOK FOR WED JUN 24 GOOD.
VENTILATION INDEX (CATEGORY) 144 (POOR). 537 (FAIR).
OUTLOOK FOR TUE JUN 23 582 (FAIR).
OUTLOOK FOR WED JUN 24 647 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 0-1 MPH. N 6-11 MPH.
TRANSPORT WINDS N 5-6 MPH. N 8-12 MPH.
MIXING HEIGHT NEAR SURFACE. 10500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE JUN 23 GOOD.
OUTLOOK FOR WED JUN 24 GOOD.
VENTILATION INDEX (CATEGORY) 93 (POOR). 621 (GOOD).
OUTLOOK FOR TUE JUN 23 555 (FAIR).
OUTLOOK FOR WED JUN 24 597 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 2-6 MPH. N 6-11 MPH.
TRANSPORT WINDS S 4-8 MPH. N 7-11 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE JUN 23 FAIR.
OUTLOOK FOR WED JUN 24 FAIR.
VENTILATION INDEX (CATEGORY) 37 (POOR). 549 (FAIR).
OUTLOOK FOR TUE JUN 23 647 (GOOD).
OUTLOOK FOR WED JUN 24 561 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 245 (POOR)
ELLENSBURG 308 (FAIR)
GOLDENDALE 639 (GOOD)
TRI-CITIES 660 (GOOD)
WALLA WALLA 482 (FAIR)
YAKIMA 442 (FAIR)
BEND 353 (FAIR)
PRINEVILLE 456 (FAIR)
ENTERPRISE 546 (FAIR)
HERMISTON 573 (FAIR)
JOHN DAY 380 (FAIR)
LA GRANDE 579 (FAIR)
MADRAS 593 (FAIR)
MEACHAM 479 (FAIR)
PENDLETON 604 (GOOD)
REDMOND 522 (FAIR)
SENECA 496 (FAIR)
THE DALLES 666 (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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