083
AUUS46 KPDT 261225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED AUG 26 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 4-12 MPH. W 11-16 MPH.
TRANSPORT WINDS SW 7-13 MPH. W 14-18 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU AUG 27 FAIR.
OUTLOOK FOR FRI AUG 28 FAIR.
VENTILATION INDEX (CATEGORY) 85 (POOR). 525 (FAIR).
OUTLOOK FOR THU AUG 27 583 (FAIR).
OUTLOOK FOR FRI AUG 28 355 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-5 MPH. SW 7-17 MPH.
TRANSPORT WINDS W 4-8 MPH. SW 11-18 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU AUG 27 GOOD.
OUTLOOK FOR FRI AUG 28 FAIR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 585 (FAIR).
OUTLOOK FOR THU AUG 27 772 (GOOD).
OUTLOOK FOR FRI AUG 28 203 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 1-3 MPH. SW 8-14 MPH.
TRANSPORT WINDS S 4-5 MPH. SW 17-21 MPH.
MIXING HEIGHT NEAR SURFACE. 13000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU AUG 27 GOOD.
OUTLOOK FOR FRI AUG 28 FAIR.
VENTILATION INDEX (CATEGORY) 35 (POOR). 1048 (GOOD).
OUTLOOK FOR THU AUG 27 443 (FAIR).
OUTLOOK FOR FRI AUG 28 257 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-8 MPH. W 8-11 MPH.
TRANSPORT WINDS S 6-11 MPH. W 10-16 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU AUG 27 FAIR.
OUTLOOK FOR FRI AUG 28 FAIR.
VENTILATION INDEX (CATEGORY) 72 (POOR). 432 (FAIR).
OUTLOOK FOR THU AUG 27 417 (FAIR).
OUTLOOK FOR FRI AUG 28 304 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 323 (FAIR)
ELLENSBURG 454 (FAIR)
GOLDENDALE 606 (GOOD)
TRI-CITIES 570 (FAIR)
WALLA WALLA 435 (FAIR)
YAKIMA 638 (GOOD)
BEND 1050 (GOOD)
PRINEVILLE 864 (GOOD)
ENTERPRISE 1050 (GOOD)
HERMISTON 609 (GOOD)
JOHN DAY 1050 (GOOD)
LA GRANDE 1050 (GOOD)
MADRAS 572 (FAIR)
MEACHAM 504 (FAIR)
PENDLETON 461 (FAIR)
REDMOND 786 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 476 (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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