101
AUUS46 KPDT 231225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI OCT 23 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 8-19 MPH. W 7-12 MPH.
TRANSPORT WINDS W 11-23 MPH. W 11-14 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SAT OCT 24 POOR.
OUTLOOK FOR SUN OCT 25 POOR.
VENTILATION INDEX (CATEGORY) 81 (POOR). 443 (FAIR).
OUTLOOK FOR SAT OCT 24 55 (POOR).
OUTLOOK FOR SUN OCT 25 64 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 6-12 MPH. NW 2-6 MPH.
TRANSPORT WINDS NW 9-17 MPH. NW 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SAT OCT 24 POOR.
OUTLOOK FOR SUN OCT 25 POOR.
VENTILATION INDEX (CATEGORY) 61 (POOR). 264 (POOR).
OUTLOOK FOR SAT OCT 24 86 (POOR).
OUTLOOK FOR SUN OCT 25 54 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 10-21 MPH. NW 10-16 MPH.
TRANSPORT WINDS NW 15-26 MPH. NW 16-20 MPH.
MIXING HEIGHT 4000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SAT OCT 24 FAIR.
OUTLOOK FOR SUN OCT 25 GOOD.
VENTILATION INDEX (CATEGORY) 245 (POOR). 541 (FAIR).
OUTLOOK FOR SAT OCT 24 269 (POOR).
OUTLOOK FOR SUN OCT 25 396 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 9-16 MPH. W 8-11 MPH.
TRANSPORT WINDS SW 14-20 MPH. W 13-19 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SAT OCT 24 POOR.
OUTLOOK FOR SUN OCT 25 POOR.
VENTILATION INDEX (CATEGORY) 113 (POOR). 474 (FAIR).
OUTLOOK FOR SAT OCT 24 63 (POOR).
OUTLOOK FOR SUN OCT 25 93 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 319 (FAIR)
ELLENSBURG 512 (FAIR)
GOLDENDALE 274 (POOR)
TRI-CITIES 494 (FAIR)
WALLA WALLA 481 (FAIR)
YAKIMA 347 (FAIR)
BEND 300 (POOR)
PRINEVILLE 283 (POOR)
ENTERPRISE 546 (FAIR)
HERMISTON 364 (FAIR)
JOHN DAY 470 (FAIR)
LA GRANDE 566 (FAIR)
MADRAS 222 (POOR)
MEACHAM 473 (FAIR)
PENDLETON 442 (FAIR)
REDMOND 266 (POOR)
SENECA 482 (FAIR)
THE DALLES 423 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page