164
AUUS46 KPDT 291225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON JUN 29 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 15-28 MPH. SW 15-21 MPH.
TRANSPORT WINDS SW 18-30 MPH. SW 16-22 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR TUE JUN 30 GOOD.
OUTLOOK FOR WED JUL 1 FAIR.
VENTILATION INDEX (CATEGORY) 227 (POOR). 522 (FAIR).
OUTLOOK FOR TUE JUN 30 814 (GOOD).
OUTLOOK FOR WED JUL 1 750 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 7-13 MPH. W 6-11 MPH.
TRANSPORT WINDS W 9-15 MPH. W 9-15 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR TUE JUN 30 FAIR.
OUTLOOK FOR WED JUL 1 FAIR.
VENTILATION INDEX (CATEGORY) 114 (POOR). 438 (FAIR).
OUTLOOK FOR TUE JUN 30 447 (FAIR).
OUTLOOK FOR WED JUL 1 333 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 3-7 MPH. SE 1-3 MPH.
TRANSPORT WINDS W 9-17 MPH. W 8-11 MPH.
MIXING HEIGHT 4000 FT MSL. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE JUN 30 FAIR.
OUTLOOK FOR WED JUL 1 GOOD.
VENTILATION INDEX (CATEGORY) 155 (POOR). 267 (POOR).
OUTLOOK FOR TUE JUN 30 289 (POOR).
OUTLOOK FOR WED JUL 1 420 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 14-24 MPH. SW 10-18 MPH.
TRANSPORT WINDS SW 19-27 MPH. SW 15-21 MPH.
MIXING HEIGHT 2000 FT MSL. 4000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR TUE JUN 30 FAIR.
OUTLOOK FOR WED JUL 1 FAIR.
VENTILATION INDEX (CATEGORY) 257 (POOR). 423 (FAIR).
OUTLOOK FOR TUE JUN 30 686 (GOOD).
OUTLOOK FOR WED JUL 1 651 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 496 (FAIR)
ELLENSBURG 667 (GOOD)
GOLDENDALE 579 (FAIR)
TRI-CITIES 538 (FAIR)
WALLA WALLA 377 (FAIR)
YAKIMA 563 (FAIR)
BEND 399 (FAIR)
PRINEVILLE 481 (FAIR)
ENTERPRISE 163 (POOR)
HERMISTON 575 (FAIR)
JOHN DAY 338 (FAIR)
LA GRANDE 361 (FAIR)
MADRAS 440 (FAIR)
MEACHAM 390 (FAIR)
PENDLETON 484 (FAIR)
REDMOND 511 (FAIR)
SENECA 406 (FAIR)
THE DALLES 805 (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.
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