295
AUUS46 KPDT 091225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED SEP 9 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SE 1-7 MPH. NW 2-5 MPH.
TRANSPORT WINDS SE 3-7 MPH. W 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU SEP 10 GOOD.
OUTLOOK FOR FRI SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 141 (POOR).
OUTLOOK FOR THU SEP 10 736 (GOOD).
OUTLOOK FOR FRI SEP 11 297 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-3 MPH. SE 3-6 MPH.
TRANSPORT WINDS NW 3-5 MPH. S 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU SEP 10 FAIR.
OUTLOOK FOR FRI SEP 11 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 149 (POOR).
OUTLOOK FOR THU SEP 10 554 (FAIR).
OUTLOOK FOR FRI SEP 11 152 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 1-4 MPH. S 3-5 MPH.
TRANSPORT WINDS S 3-5 MPH. SW 8-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU SEP 10 GOOD.
OUTLOOK FOR FRI SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 28 (POOR). 310 (FAIR).
OUTLOOK FOR THU SEP 10 764 (GOOD).
OUTLOOK FOR FRI SEP 11 249 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 4-9 MPH. NW 2-4 MPH.
TRANSPORT WINDS SE 5-9 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU SEP 10 GOOD.
OUTLOOK FOR FRI SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 37 (POOR). 211 (POOR).
OUTLOOK FOR THU SEP 10 847 (GOOD).
OUTLOOK FOR FRI SEP 11 293 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 222 (POOR)
ELLENSBURG 148 (POOR)
GOLDENDALE 115 (POOR)
TRI-CITIES 118 (POOR)
WALLA WALLA 190 (POOR)
YAKIMA 141 (POOR)
BEND 286 (POOR)
PRINEVILLE 240 (POOR)
ENTERPRISE 243 (POOR)
HERMISTON 116 (POOR)
JOHN DAY 395 (FAIR)
LA GRANDE 281 (POOR)
MADRAS 132 (POOR)
MEACHAM 276 (POOR)
PENDLETON 158 (POOR)
REDMOND 157 (POOR)
SENECA 445 (FAIR)
THE DALLES 31 (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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