673
AUUS46 KPDT 071325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST WED JAN 7 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 13-25 MPH. SW 12-18 MPH.
TRANSPORT WINDS SW 17-25 MPH. SW 17-25 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU JAN 8 GOOD.
OUTLOOK FOR FRI JAN 9 FAIR.
VENTILATION INDEX (CATEGORY) 86 (POOR). 455 (FAIR).
OUTLOOK FOR THU JAN 8 659 (GOOD).
OUTLOOK FOR FRI JAN 9 272 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS SW 6-12 MPH. SW 9-15 MPH.
TRANSPORT WINDS SW 7-16 MPH. SW 13-22 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JAN 8 GOOD.
OUTLOOK FOR FRI JAN 9 POOR.
VENTILATION INDEX (CATEGORY) 65 (POOR). 328 (FAIR).
OUTLOOK FOR THU JAN 8 414 (FAIR).
OUTLOOK FOR FRI JAN 9 54 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 9-12 MPH. S 7-9 MPH.
TRANSPORT WINDS W 16-21 MPH. SW 13-19 MPH.
MIXING HEIGHT 5000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU JAN 8 GOOD.
OUTLOOK FOR FRI JAN 9 FAIR.
VENTILATION INDEX (CATEGORY) 194 (POOR). 511 (FAIR).
OUTLOOK FOR THU JAN 8 951 (GOOD).
OUTLOOK FOR FRI JAN 9 181 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 15-30 MPH. SW 10-18 MPH.
TRANSPORT WINDS SW 19-28 MPH. SW 16-22 MPH.
MIXING HEIGHT 2000 FT MSL. 4500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU JAN 8 GOOD.
OUTLOOK FOR FRI JAN 9 FAIR.
VENTILATION INDEX (CATEGORY) 136 (POOR). 521 (FAIR).
OUTLOOK FOR THU JAN 8 744 (GOOD).
OUTLOOK FOR FRI JAN 9 321 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 230 (POOR)
ELLENSBURG 77 (POOR)
GOLDENDALE 272 (POOR)
TRI-CITIES 411 (FAIR)
WALLA WALLA 356 (FAIR)
YAKIMA 148 (POOR)
BEND 928 (GOOD)
PRINEVILLE 881 (GOOD)
ENTERPRISE 301 (FAIR)
HERMISTON 467 (FAIR)
JOHN DAY 671 (GOOD)
LA GRANDE 667 (GOOD)
MADRAS 861 (GOOD)
MEACHAM 533 (FAIR)
PENDLETON 436 (FAIR)
REDMOND 786 (GOOD)
SENECA 944 (GOOD)
THE DALLES 152 (POOR)
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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