561
AUUS46 KPDT 171225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI JUL 17 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 8-13 MPH.
TRANSPORT WINDS SW 11-19 MPH. W 8-13 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SAT JUL 18 FAIR.
OUTLOOK FOR SUN JUL 19 FAIR.
VENTILATION INDEX (CATEGORY) 172 (POOR). 387 (FAIR).
OUTLOOK FOR SAT JUL 18 530 (FAIR).
OUTLOOK FOR SUN JUL 19 348 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 3-8 MPH. SW 6-12 MPH.
TRANSPORT WINDS W 4-9 MPH. SW 8-15 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUL 18 FAIR.
OUTLOOK FOR SUN JUL 19 FAIR.
VENTILATION INDEX (CATEGORY) 53 (POOR). 373 (FAIR).
OUTLOOK FOR SAT JUL 18 414 (FAIR).
OUTLOOK FOR SUN JUL 19 214 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 2-6 MPH. NW 6-8 MPH.
TRANSPORT WINDS NW 5-9 MPH. W 8-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUL 18 GOOD.
OUTLOOK FOR SUN JUL 19 GOOD.
VENTILATION INDEX (CATEGORY) 55 (POOR). 213 (POOR).
OUTLOOK FOR SAT JUL 18 469 (FAIR).
OUTLOOK FOR SUN JUL 19 413 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-14 MPH. NW 7-10 MPH.
TRANSPORT WINDS SW 8-18 MPH. W 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SAT JUL 18 FAIR.
OUTLOOK FOR SUN JUL 19 FAIR.
VENTILATION INDEX (CATEGORY) 119 (POOR). 280 (POOR).
OUTLOOK FOR SAT JUL 18 440 (FAIR).
OUTLOOK FOR SUN JUL 19 347 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 354 (FAIR)
ELLENSBURG 465 (FAIR)
GOLDENDALE 520 (FAIR)
TRI-CITIES 361 (FAIR)
WALLA WALLA 319 (FAIR)
YAKIMA 464 (FAIR)
BEND 479 (FAIR)
PRINEVILLE 462 (FAIR)
ENTERPRISE 298 (POOR)
HERMISTON 403 (FAIR)
JOHN DAY 576 (FAIR)
LA GRANDE 234 (POOR)
MADRAS 292 (POOR)
MEACHAM 206 (POOR)
PENDLETON 315 (FAIR)
REDMOND 403 (FAIR)
SENECA 1024 (GOOD)
THE DALLES 482 (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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