627
AUUS46 KPDT 091225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN AUG 9 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 6-12 MPH.
TRANSPORT WINDS SW 7-13 MPH. W 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON AUG 10 FAIR.
OUTLOOK FOR TUE AUG 11 FAIR.
VENTILATION INDEX (CATEGORY) 95 (POOR). 412 (FAIR).
OUTLOOK FOR MON AUG 10 477 (FAIR).
OUTLOOK FOR TUE AUG 11 351 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-6 MPH. NW 2-6 MPH.
TRANSPORT WINDS NW 4-8 MPH. W 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON AUG 10 FAIR.
OUTLOOK FOR TUE AUG 11 FAIR.
VENTILATION INDEX (CATEGORY) 49 (POOR). 307 (FAIR).
OUTLOOK FOR MON AUG 10 350 (FAIR).
OUTLOOK FOR TUE AUG 11 238 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. NW 7-10 MPH.
TRANSPORT WINDS W 3-6 MPH. W 9-11 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON AUG 10 GOOD.
OUTLOOK FOR TUE AUG 11 GOOD.
VENTILATION INDEX (CATEGORY) 40 (POOR). 376 (FAIR).
OUTLOOK FOR MON AUG 10 456 (FAIR).
OUTLOOK FOR TUE AUG 11 332 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 5-13 MPH. W 7-10 MPH.
TRANSPORT WINDS S 8-14 MPH. W 10-13 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON AUG 10 FAIR.
OUTLOOK FOR TUE AUG 11 FAIR.
VENTILATION INDEX (CATEGORY) 108 (POOR). 433 (FAIR).
OUTLOOK FOR MON AUG 10 549 (FAIR).
OUTLOOK FOR TUE AUG 11 324 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 442 (FAIR)
ELLENSBURG 739 (GOOD)
GOLDENDALE 476 (FAIR)
TRI-CITIES 323 (FAIR)
WALLA WALLA 433 (FAIR)
YAKIMA 308 (FAIR)
BEND 494 (FAIR)
PRINEVILLE 463 (FAIR)
ENTERPRISE 440 (FAIR)
HERMISTON 405 (FAIR)
JOHN DAY 522 (FAIR)
LA GRANDE 438 (FAIR)
MADRAS 387 (FAIR)
MEACHAM 351 (FAIR)
PENDLETON 467 (FAIR)
REDMOND 476 (FAIR)
SENECA 673 (GOOD)
THE DALLES 489 (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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