144
AUUS46 KPDT 051225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON OCT 5 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. W 4-8 MPH.
TRANSPORT WINDS S 3-7 MPH. W 8-10 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE OCT 6 POOR.
OUTLOOK FOR WED OCT 7 POOR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 187 (POOR).
OUTLOOK FOR TUE OCT 6 125 (POOR).
OUTLOOK FOR WED OCT 7 94 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-4 MPH. SE 1-4 MPH.
TRANSPORT WINDS NW 3-6 MPH. W 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE OCT 6 POOR.
OUTLOOK FOR WED OCT 7 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 79 (POOR).
OUTLOOK FOR TUE OCT 6 66 (POOR).
OUTLOOK FOR WED OCT 7 62 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 0-2 MPH. NW 3-5 MPH.
TRANSPORT WINDS W 2-5 MPH. W 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE OCT 6 FAIR.
OUTLOOK FOR WED OCT 7 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 251 (POOR).
OUTLOOK FOR TUE OCT 6 144 (POOR).
OUTLOOK FOR WED OCT 7 95 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. W 4-8 MPH.
TRANSPORT WINDS S 5-7 MPH. W 9-13 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE OCT 6 FAIR.
OUTLOOK FOR WED OCT 7 POOR.
VENTILATION INDEX (CATEGORY) 30 (POOR). 224 (POOR).
OUTLOOK FOR TUE OCT 6 156 (POOR).
OUTLOOK FOR WED OCT 7 103 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 317 (FAIR)
ELLENSBURG 326 (FAIR)
GOLDENDALE 249 (POOR)
TRI-CITIES 140 (POOR)
WALLA WALLA 220 (POOR)
YAKIMA 81 (POOR)
BEND 370 (FAIR)
PRINEVILLE 280 (POOR)
ENTERPRISE 312 (FAIR)
HERMISTON 179 (POOR)
JOHN DAY 366 (FAIR)
LA GRANDE 307 (FAIR)
MADRAS 175 (POOR)
MEACHAM 231 (POOR)
PENDLETON 175 (POOR)
REDMOND 293 (POOR)
SENECA 561 (FAIR)
THE DALLES 282 (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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