602
AUUS46 KPDT 151225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON SEP 15 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 6-15 MPH. NW 5-6 MPH.
TRANSPORT WINDS SW 9-16 MPH. E 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. POOR.
OUTLOOK FOR TUE SEP 16 POOR.
OUTLOOK FOR WED SEP 17 POOR.
VENTILATION INDEX (CATEGORY) 96 (POOR). 124 (POOR).
OUTLOOK FOR TUE SEP 16 115 (POOR).
OUTLOOK FOR WED SEP 17 86 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-7 MPH. SE 3-7 MPH.
TRANSPORT WINDS W 4-8 MPH. E 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
OUTLOOK FOR WED SEP 17 POOR.
VENTILATION INDEX (CATEGORY) 54 (POOR). 130 (POOR).
OUTLOOK FOR TUE SEP 16 248 (POOR).
OUTLOOK FOR WED SEP 17 116 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 1-3 MPH. N 3-5 MPH.
TRANSPORT WINDS W 3-6 MPH. N 4-5 MPH.
MIXING HEIGHT 4000 FT MSL. 8000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
OUTLOOK FOR WED SEP 17 GOOD.
VENTILATION INDEX (CATEGORY) 60 (POOR). 162 (POOR).
OUTLOOK FOR TUE SEP 16 326 (FAIR).
OUTLOOK FOR WED SEP 17 349 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 5-15 MPH. NW 5-7 MPH.
TRANSPORT WINDS SW 9-17 MPH. N 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
OUTLOOK FOR WED SEP 17 POOR.
VENTILATION INDEX (CATEGORY) 112 (POOR). 98 (POOR).
OUTLOOK FOR TUE SEP 16 167 (POOR).
OUTLOOK FOR WED SEP 17 109 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 217 (POOR)
ELLENSBURG 222 (POOR)
GOLDENDALE 165 (POOR)
TRI-CITIES 151 (POOR)
WALLA WALLA 65 (POOR)
YAKIMA 161 (POOR)
BEND 136 (POOR)
PRINEVILLE 117 (POOR)
ENTERPRISE 172 (POOR)
HERMISTON 59 (POOR)
JOHN DAY 142 (POOR)
LA GRANDE 168 (POOR)
MADRAS 118 (POOR)
MEACHAM 93 (POOR)
PENDLETON 93 (POOR)
REDMOND 132 (POOR)
SENECA 199 (POOR)
THE DALLES 117 (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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