392
AUUS46 KPDT 081225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE SEP 8 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 1-7 MPH. N 2-6 MPH.
TRANSPORT WINDS S 4-8 MPH. E 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED SEP 9 FAIR.
OUTLOOK FOR THU SEP 10 GOOD.
VENTILATION INDEX (CATEGORY) 34 (POOR). 94 (POOR).
OUTLOOK FOR WED SEP 9 171 (POOR).
OUTLOOK FOR THU SEP 10 710 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. SE 3-8 MPH.
TRANSPORT WINDS NW 3-6 MPH. SE 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED SEP 9 FAIR.
OUTLOOK FOR THU SEP 10 FAIR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 145 (POOR).
OUTLOOK FOR WED SEP 9 179 (POOR).
OUTLOOK FOR THU SEP 10 518 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 0-1 MPH. N 1-4 MPH.
TRANSPORT WINDS W 2-4 MPH. NW 3-5 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED SEP 9 FAIR.
OUTLOOK FOR THU SEP 10 GOOD.
VENTILATION INDEX (CATEGORY) 25 (POOR). 115 (POOR).
OUTLOOK FOR WED SEP 9 322 (FAIR).
OUTLOOK FOR THU SEP 10 705 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-7 MPH. N 3-5 MPH.
TRANSPORT WINDS S 6-9 MPH. N 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED SEP 9 FAIR.
OUTLOOK FOR THU SEP 10 GOOD.
VENTILATION INDEX (CATEGORY) 45 (POOR). 152 (POOR).
OUTLOOK FOR WED SEP 9 253 (POOR).
OUTLOOK FOR THU SEP 10 829 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 151 (POOR)
ELLENSBURG 204 (POOR)
GOLDENDALE 151 (POOR)
TRI-CITIES 81 (POOR)
WALLA WALLA 83 (POOR)
YAKIMA 155 (POOR)
BEND 242 (POOR)
PRINEVILLE 165 (POOR)
ENTERPRISE 252 (POOR)
HERMISTON 97 (POOR)
JOHN DAY 192 (POOR)
LA GRANDE 120 (POOR)
MADRAS 174 (POOR)
MEACHAM 141 (POOR)
PENDLETON 149 (POOR)
REDMOND 188 (POOR)
SENECA 252 (POOR)
THE DALLES 178 (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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