907
AUUS46 KPDT 161225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU JUL 16 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 4-9 MPH. W 7-13 MPH.
TRANSPORT WINDS W 6-11 MPH. SW 9-16 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUL 17 FAIR.
OUTLOOK FOR SAT JUL 18 FAIR.
VENTILATION INDEX (CATEGORY) 63 (POOR). 308 (FAIR).
OUTLOOK FOR FRI JUL 17 404 (FAIR).
OUTLOOK FOR SAT JUL 18 434 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-7 MPH. SW 5-10 MPH.
TRANSPORT WINDS NW 9-13 MPH. S 7-13 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUL 17 FAIR.
OUTLOOK FOR SAT JUL 18 FAIR.
VENTILATION INDEX (CATEGORY) 87 (POOR). 253 (POOR).
OUTLOOK FOR FRI JUL 17 378 (FAIR).
OUTLOOK FOR SAT JUL 18 278 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 0-2 MPH. NW 7-12 MPH.
TRANSPORT WINDS NW 4-6 MPH. SW 10-18 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR FRI JUL 17 FAIR.
OUTLOOK FOR SAT JUL 18 GOOD.
VENTILATION INDEX (CATEGORY) 26 (POOR). 619 (GOOD).
OUTLOOK FOR FRI JUL 17 285 (POOR).
OUTLOOK FOR SAT JUL 18 327 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-8 MPH. NW 6-11 MPH.
TRANSPORT WINDS SW 5-10 MPH. W 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUL 17 FAIR.
OUTLOOK FOR SAT JUL 18 FAIR.
VENTILATION INDEX (CATEGORY) 43 (POOR). 251 (POOR).
OUTLOOK FOR FRI JUL 17 311 (FAIR).
OUTLOOK FOR SAT JUL 18 359 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 267 (POOR)
ELLENSBURG 743 (GOOD)
GOLDENDALE 576 (FAIR)
TRI-CITIES 144 (POOR)
WALLA WALLA 232 (POOR)
YAKIMA 436 (FAIR)
BEND 561 (FAIR)
PRINEVILLE 596 (FAIR)
ENTERPRISE 1050 (GOOD)
HERMISTON 406 (FAIR)
JOHN DAY 1050 (GOOD)
LA GRANDE 508 (FAIR)
MADRAS 504 (FAIR)
MEACHAM 112 (POOR)
PENDLETON 371 (FAIR)
REDMOND 610 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 538 (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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