293
AUUS46 KPDT 301225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE JUN 30 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 13-26 MPH. SW 12-20 MPH.
TRANSPORT WINDS SW 16-27 MPH. W 14-20 MPH.
MIXING HEIGHT 2000 FT MSL. 7000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR WED JUL 1 GOOD.
OUTLOOK FOR THU JUL 2 FAIR.
VENTILATION INDEX (CATEGORY) 333 (FAIR). 804 (GOOD).
OUTLOOK FOR WED JUL 1 708 (GOOD).
OUTLOOK FOR THU JUL 2 561 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 4-9 MPH. NW 5-10 MPH.
TRANSPORT WINDS W 5-10 MPH. NW 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED JUL 1 FAIR.
OUTLOOK FOR THU JUL 2 FAIR.
VENTILATION INDEX (CATEGORY) 144 (POOR). 532 (FAIR).
OUTLOOK FOR WED JUL 1 372 (FAIR).
OUTLOOK FOR THU JUL 2 264 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 0-2 MPH. NW 3-6 MPH.
TRANSPORT WINDS W 4-8 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED JUL 1 GOOD.
OUTLOOK FOR THU JUL 2 GOOD.
VENTILATION INDEX (CATEGORY) 79 (POOR). 329 (FAIR).
OUTLOOK FOR WED JUL 1 527 (FAIR).
OUTLOOK FOR THU JUL 2 441 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 7-22 MPH. W 10-16 MPH.
TRANSPORT WINDS SW 13-22 MPH. W 15-18 MPH.
MIXING HEIGHT 2000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR WED JUL 1 FAIR.
OUTLOOK FOR THU JUL 2 FAIR.
VENTILATION INDEX (CATEGORY) 279 (POOR). 695 (GOOD).
OUTLOOK FOR WED JUL 1 589 (FAIR).
OUTLOOK FOR THU JUL 2 455 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 562 (FAIR)
ELLENSBURG 909 (GOOD)
GOLDENDALE 768 (GOOD)
TRI-CITIES 657 (GOOD)
WALLA WALLA 704 (GOOD)
YAKIMA 732 (GOOD)
BEND 574 (FAIR)
PRINEVILLE 613 (GOOD)
ENTERPRISE 147 (POOR)
HERMISTON 836 (GOOD)
JOHN DAY 561 (FAIR)
LA GRANDE 383 (FAIR)
MADRAS 603 (GOOD)
MEACHAM 538 (FAIR)
PENDLETON 812 (GOOD)
REDMOND 639 (GOOD)
SENECA 582 (FAIR)
THE DALLES 916 (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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