043
AUUS46 KPDT 081225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED JUL 8 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 9-19 MPH. W 8-14 MPH.
TRANSPORT WINDS SW 11-20 MPH. W 10-14 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR THU JUL 9 GOOD.
OUTLOOK FOR FRI JUL 10 GOOD.
VENTILATION INDEX (CATEGORY) 188 (POOR). 545 (FAIR).
OUTLOOK FOR THU JUL 9 573 (FAIR).
OUTLOOK FOR FRI JUL 10 634 (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 5-10 MPH.
TRANSPORT WINDS NW 6-12 MPH. W 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUL 9 FAIR.
OUTLOOK FOR FRI JUL 10 FAIR.
VENTILATION INDEX (CATEGORY) 108 (POOR). 476 (FAIR).
OUTLOOK FOR THU JUL 9 422 (FAIR).
OUTLOOK FOR FRI JUL 10 428 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. NW 10-14 MPH.
TRANSPORT WINDS W 6-11 MPH. NW 11-14 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUL 9 GOOD.
OUTLOOK FOR FRI JUL 10 GOOD.
VENTILATION INDEX (CATEGORY) 91 (POOR). 462 (FAIR).
OUTLOOK FOR THU JUL 9 614 (GOOD).
OUTLOOK FOR FRI JUL 10 434 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 7-20 MPH. W 10-13 MPH.
TRANSPORT WINDS SW 10-18 MPH. W 11-14 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR THU JUL 9 FAIR.
OUTLOOK FOR FRI JUL 10 FAIR.
VENTILATION INDEX (CATEGORY) 190 (POOR). 520 (FAIR).
OUTLOOK FOR THU JUL 9 642 (GOOD).
OUTLOOK FOR FRI JUL 10 548 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 554 (FAIR)
ELLENSBURG 944 (GOOD)
GOLDENDALE 646 (GOOD)
TRI-CITIES 490 (FAIR)
WALLA WALLA 487 (FAIR)
YAKIMA 651 (GOOD)
BEND 467 (FAIR)
PRINEVILLE 571 (FAIR)
ENTERPRISE 437 (FAIR)
HERMISTON 496 (FAIR)
JOHN DAY 518 (FAIR)
LA GRANDE 508 (FAIR)
MADRAS 500 (FAIR)
MEACHAM 412 (FAIR)
PENDLETON 566 (FAIR)
REDMOND 551 (FAIR)
SENECA 635 (GOOD)
THE DALLES 616 (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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