183
AUUS46 KPDT 051325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST WED NOV 5 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 8-17 MPH. SW 17-24 MPH.
TRANSPORT WINDS W 9-17 MPH. SW 17-24 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR THU NOV 6 GOOD.
OUTLOOK FOR FRI NOV 7 GOOD.
VENTILATION INDEX (CATEGORY) 50 (POOR). 308 (FAIR).
OUTLOOK FOR THU NOV 6 688 (GOOD).
OUTLOOK FOR FRI NOV 7 773 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 3-10 MPH. SW 11-18 MPH.
TRANSPORT WINDS NW 5-10 MPH. SW 11-18 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU NOV 6 GOOD.
OUTLOOK FOR FRI NOV 7 GOOD.
VENTILATION INDEX (CATEGORY) 31 (POOR). 144 (POOR).
OUTLOOK FOR THU NOV 6 393 (FAIR).
OUTLOOK FOR FRI NOV 7 550 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 18-27 MPH. S 22-28 MPH.
TRANSPORT WINDS S 19-27 MPH. S 24-28 MPH.
MIXING HEIGHT 4000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR THU NOV 6 GOOD.
OUTLOOK FOR FRI NOV 7 GOOD.
VENTILATION INDEX (CATEGORY) 285 (POOR). 737 (GOOD).
OUTLOOK FOR THU NOV 6 648 (GOOD).
OUTLOOK FOR FRI NOV 7 774 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 14-28 MPH. SW 20-25 MPH.
TRANSPORT WINDS S 15-28 MPH. SW 21-30 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU NOV 6 GOOD.
OUTLOOK FOR FRI NOV 7 GOOD.
VENTILATION INDEX (CATEGORY) 163 (POOR). 591 (FAIR).
OUTLOOK FOR THU NOV 6 822 (GOOD).
OUTLOOK FOR FRI NOV 7 865 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 216 (POOR)
ELLENSBURG 164 (POOR)
GOLDENDALE 243 (POOR)
TRI-CITIES 148 (POOR)
WALLA WALLA 352 (FAIR)
YAKIMA 117 (POOR)
BEND 1050 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 809 (GOOD)
HERMISTON 217 (POOR)
JOHN DAY 1050 (GOOD)
LA GRANDE 796 (GOOD)
MADRAS 1050 (GOOD)
MEACHAM 737 (GOOD)
PENDLETON 561 (FAIR)
REDMOND 1050 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 147 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page