902
AUUS46 KPDT 121225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON OCT 12 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 2-6 MPH. NW 2-5 MPH.
TRANSPORT WINDS W 4-8 MPH. NW 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE OCT 13 FAIR.
OUTLOOK FOR WED OCT 14 FAIR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 186 (POOR).
OUTLOOK FOR TUE OCT 13 199 (POOR).
OUTLOOK FOR WED OCT 14 184 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. SE 2-5 MPH.
TRANSPORT WINDS NW 5-9 MPH. N 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE OCT 13 POOR.
OUTLOOK FOR WED OCT 14 POOR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 183 (POOR).
OUTLOOK FOR TUE OCT 13 88 (POOR).
OUTLOOK FOR WED OCT 14 95 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 2-9 MPH. NW 5-9 MPH.
TRANSPORT WINDS NW 5-11 MPH. NW 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE OCT 13 FAIR.
OUTLOOK FOR WED OCT 14 FAIR.
VENTILATION INDEX (CATEGORY) 67 (POOR). 241 (POOR).
OUTLOOK FOR TUE OCT 13 284 (POOR).
OUTLOOK FOR WED OCT 14 225 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 2-6 MPH. W 2-4 MPH.
TRANSPORT WINDS SW 4-8 MPH. NW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE OCT 13 POOR.
OUTLOOK FOR WED OCT 14 FAIR.
VENTILATION INDEX (CATEGORY) 41 (POOR). 158 (POOR).
OUTLOOK FOR TUE OCT 13 210 (POOR).
OUTLOOK FOR WED OCT 14 250 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 250 (POOR)
ELLENSBURG 155 (POOR)
GOLDENDALE 199 (POOR)
TRI-CITIES 194 (POOR)
WALLA WALLA 118 (POOR)
YAKIMA 123 (POOR)
BEND 484 (FAIR)
PRINEVILLE 480 (FAIR)
ENTERPRISE 162 (POOR)
HERMISTON 206 (POOR)
JOHN DAY 417 (FAIR)
LA GRANDE 270 (POOR)
MADRAS 321 (FAIR)
MEACHAM 162 (POOR)
PENDLETON 196 (POOR)
REDMOND 436 (FAIR)
SENECA 475 (FAIR)
THE DALLES 153 (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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