362
AUUS46 KPDT 121225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED AUG 12 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 6-15 MPH. W 6-12 MPH.
TRANSPORT WINDS SW 8-15 MPH. W 7-13 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU AUG 13 FAIR.
OUTLOOK FOR FRI AUG 14 FAIR.
VENTILATION INDEX (CATEGORY) 123 (POOR). 456 (FAIR).
OUTLOOK FOR THU AUG 13 367 (FAIR).
OUTLOOK FOR FRI AUG 14 321 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-8 MPH. W 3-6 MPH.
TRANSPORT WINDS NW 5-10 MPH. NW 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU AUG 13 POOR.
OUTLOOK FOR FRI AUG 14 POOR.
VENTILATION INDEX (CATEGORY) 66 (POOR). 301 (FAIR).
OUTLOOK FOR THU AUG 13 395 (FAIR).
OUTLOOK FOR FRI AUG 14 195 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 2-6 MPH. NW 9-12 MPH.
TRANSPORT WINDS NW 4-8 MPH. NW 10-13 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU AUG 13 GOOD.
OUTLOOK FOR FRI AUG 14 GOOD.
VENTILATION INDEX (CATEGORY) 56 (POOR). 439 (FAIR).
OUTLOOK FOR THU AUG 13 484 (FAIR).
OUTLOOK FOR FRI AUG 14 316 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 5-14 MPH. W 7-10 MPH.
TRANSPORT WINDS SW 9-16 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR THU AUG 13 FAIR.
OUTLOOK FOR FRI AUG 14 FAIR.
VENTILATION INDEX (CATEGORY) 126 (POOR). 437 (FAIR).
OUTLOOK FOR THU AUG 13 343 (FAIR).
OUTLOOK FOR FRI AUG 14 378 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 344 (FAIR)
ELLENSBURG 775 (GOOD)
GOLDENDALE 541 (FAIR)
TRI-CITIES 334 (FAIR)
WALLA WALLA 461 (FAIR)
YAKIMA 359 (FAIR)
BEND 500 (FAIR)
PRINEVILLE 581 (FAIR)
ENTERPRISE 445 (FAIR)
HERMISTON 454 (FAIR)
JOHN DAY 604 (GOOD)
LA GRANDE 462 (FAIR)
MADRAS 495 (FAIR)
MEACHAM 332 (FAIR)
PENDLETON 503 (FAIR)
REDMOND 578 (FAIR)
SENECA 833 (GOOD)
THE DALLES 609 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page