143
AUUS46 KPDT 131225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN SEP 13 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 14-27 MPH. SW 17-21 MPH.
TRANSPORT WINDS SW 17-32 MPH. SW 22-25 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON SEP 14 FAIR.
OUTLOOK FOR TUE SEP 15 FAIR.
VENTILATION INDEX (CATEGORY) 312 (FAIR). 835 (GOOD).
OUTLOOK FOR MON SEP 14 372 (FAIR).
OUTLOOK FOR TUE SEP 15 134 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 8-15 MPH. SW 8-15 MPH.
TRANSPORT WINDS W 11-18 MPH. W 12-21 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR MON SEP 14 FAIR.
OUTLOOK FOR TUE SEP 15 POOR.
VENTILATION INDEX (CATEGORY) 124 (POOR). 314 (FAIR).
OUTLOOK FOR MON SEP 14 121 (POOR).
OUTLOOK FOR TUE SEP 15 127 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 8-15 MPH. W 9-13 MPH.
TRANSPORT WINDS W 10-19 MPH. W 16-19 MPH.
MIXING HEIGHT 4000 FT MSL. 8000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON SEP 14 FAIR.
OUTLOOK FOR TUE SEP 15 FAIR.
VENTILATION INDEX (CATEGORY) 255 (POOR). 736 (GOOD).
OUTLOOK FOR MON SEP 14 227 (POOR).
OUTLOOK FOR TUE SEP 15 215 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 13-22 MPH. SW 15-20 MPH.
TRANSPORT WINDS SW 18-26 MPH. SW 18-25 MPH.
MIXING HEIGHT 2000 FT MSL. 5000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON SEP 14 FAIR.
OUTLOOK FOR TUE SEP 15 FAIR.
VENTILATION INDEX (CATEGORY) 343 (FAIR). 825 (GOOD).
OUTLOOK FOR MON SEP 14 364 (FAIR).
OUTLOOK FOR TUE SEP 15 166 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 325 (FAIR)
ELLENSBURG 349 (FAIR)
GOLDENDALE 527 (FAIR)
TRI-CITIES 662 (GOOD)
WALLA WALLA 849 (GOOD)
YAKIMA 113 (POOR)
BEND 748 (GOOD)
PRINEVILLE 712 (GOOD)
ENTERPRISE 708 (GOOD)
HERMISTON 750 (GOOD)
JOHN DAY 781 (GOOD)
LA GRANDE 859 (GOOD)
MADRAS 770 (GOOD)
MEACHAM 545 (FAIR)
PENDLETON 873 (GOOD)
REDMOND 704 (GOOD)
SENECA 851 (GOOD)
THE DALLES 602 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page