815
AUUS46 KPDT 111225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE AUG 11 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 4-11 MPH. W 6-12 MPH.
TRANSPORT WINDS SW 7-12 MPH. W 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 12 FAIR.
OUTLOOK FOR THU AUG 13 FAIR.
VENTILATION INDEX (CATEGORY) 84 (POOR). 392 (FAIR).
OUTLOOK FOR WED AUG 12 475 (FAIR).
OUTLOOK FOR THU AUG 13 284 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 1-5 MPH. NW 2-6 MPH.
TRANSPORT WINDS NW 4-9 MPH. W 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 12 FAIR.
OUTLOOK FOR THU AUG 13 POOR.
VENTILATION INDEX (CATEGORY) 47 (POOR). 297 (POOR).
OUTLOOK FOR WED AUG 12 383 (FAIR).
OUTLOOK FOR THU AUG 13 315 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 0-2 MPH. NW 8-11 MPH.
TRANSPORT WINDS W 3-6 MPH. W 10-12 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR WED AUG 12 GOOD.
OUTLOOK FOR THU AUG 13 GOOD.
VENTILATION INDEX (CATEGORY) 35 (POOR). 426 (FAIR).
OUTLOOK FOR WED AUG 12 461 (FAIR).
OUTLOOK FOR THU AUG 13 399 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-10 MPH. W 8-10 MPH.
TRANSPORT WINDS S 7-13 MPH. W 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 12 FAIR.
OUTLOOK FOR THU AUG 13 FAIR.
VENTILATION INDEX (CATEGORY) 89 (POOR). 398 (FAIR).
OUTLOOK FOR WED AUG 12 483 (FAIR).
OUTLOOK FOR THU AUG 13 283 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 474 (FAIR)
ELLENSBURG 898 (GOOD)
GOLDENDALE 541 (FAIR)
TRI-CITIES 269 (POOR)
WALLA WALLA 367 (FAIR)
YAKIMA 318 (FAIR)
BEND 478 (FAIR)
PRINEVILLE 505 (FAIR)
ENTERPRISE 538 (FAIR)
HERMISTON 359 (FAIR)
JOHN DAY 535 (FAIR)
LA GRANDE 439 (FAIR)
MADRAS 469 (FAIR)
MEACHAM 352 (FAIR)
PENDLETON 416 (FAIR)
REDMOND 486 (FAIR)
SENECA 686 (GOOD)
THE DALLES 574 (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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