167
AUUS46 KPDT 271225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON JUL 27 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 6-11 MPH.
TRANSPORT WINDS SW 7-13 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE JUL 28 GOOD.
OUTLOOK FOR WED JUL 29 FAIR.
VENTILATION INDEX (CATEGORY) 103 (POOR). 365 (FAIR).
OUTLOOK FOR TUE JUL 28 678 (GOOD).
OUTLOOK FOR WED JUL 29 320 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-6 MPH. SW 5-13 MPH.
TRANSPORT WINDS NW 4-8 MPH. SW 9-15 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE JUL 28 FAIR.
OUTLOOK FOR WED JUL 29 FAIR.
VENTILATION INDEX (CATEGORY) 54 (POOR). 536 (FAIR).
OUTLOOK FOR TUE JUL 28 579 (FAIR).
OUTLOOK FOR WED JUL 29 226 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 2-6 MPH. NW 7-9 MPH.
TRANSPORT WINDS NW 4-8 MPH. W 9-11 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE JUL 28 FAIR.
OUTLOOK FOR WED JUL 29 FAIR.
VENTILATION INDEX (CATEGORY) 59 (POOR). 357 (FAIR).
OUTLOOK FOR TUE JUL 28 421 (FAIR).
OUTLOOK FOR WED JUL 29 255 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-10 MPH. NW 7-10 MPH.
TRANSPORT WINDS SW 7-12 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE JUL 28 FAIR.
OUTLOOK FOR WED JUL 29 FAIR.
VENTILATION INDEX (CATEGORY) 96 (POOR). 308 (FAIR).
OUTLOOK FOR TUE JUL 28 527 (FAIR).
OUTLOOK FOR WED JUL 29 270 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 459 (FAIR)
ELLENSBURG 516 (FAIR)
GOLDENDALE 641 (GOOD)
TRI-CITIES 411 (FAIR)
WALLA WALLA 304 (FAIR)
YAKIMA 557 (FAIR)
BEND 726 (GOOD)
PRINEVILLE 581 (FAIR)
ENTERPRISE 315 (FAIR)
HERMISTON 379 (FAIR)
JOHN DAY 637 (GOOD)
LA GRANDE 405 (FAIR)
MADRAS 432 (FAIR)
MEACHAM 260 (POOR)
PENDLETON 310 (FAIR)
REDMOND 547 (FAIR)
SENECA 750 (GOOD)
THE DALLES 547 (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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