595
AUUS46 KPDT 111225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN OCT 11 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS NW 3-15 MPH. N 9-16 MPH.
TRANSPORT WINDS NW 5-17 MPH. N 12-20 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON OCT 12 POOR.
OUTLOOK FOR TUE OCT 13 POOR.
VENTILATION INDEX (CATEGORY) 81 (POOR). 588 (FAIR).
OUTLOOK FOR MON OCT 12 129 (POOR).
OUTLOOK FOR TUE OCT 13 115 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 5-13 MPH. NE 13-18 MPH.
TRANSPORT WINDS N 10-19 MPH. N 19-23 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR MON OCT 12 POOR.
OUTLOOK FOR TUE OCT 13 POOR.
VENTILATION INDEX (CATEGORY) 162 (POOR). 1049 (GOOD).
OUTLOOK FOR MON OCT 12 173 (POOR).
OUTLOOK FOR TUE OCT 13 83 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 5-17 MPH. NW 12-18 MPH.
TRANSPORT WINDS NW 7-17 MPH. N 13-17 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON OCT 12 FAIR.
OUTLOOK FOR TUE OCT 13 FAIR.
VENTILATION INDEX (CATEGORY) 95 (POOR). 455 (FAIR).
OUTLOOK FOR MON OCT 12 251 (POOR).
OUTLOOK FOR TUE OCT 13 251 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 2-6 MPH. N 5-9 MPH.
TRANSPORT WINDS SW 5-9 MPH. N 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON OCT 12 POOR.
OUTLOOK FOR TUE OCT 13 POOR.
VENTILATION INDEX (CATEGORY) 47 (POOR). 276 (POOR).
OUTLOOK FOR MON OCT 12 179 (POOR).
OUTLOOK FOR TUE OCT 13 143 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 624 (GOOD)
ELLENSBURG 834 (GOOD)
GOLDENDALE 960 (GOOD)
TRI-CITIES 978 (GOOD)
WALLA WALLA 308 (FAIR)
YAKIMA 1050 (GOOD)
BEND 579 (FAIR)
PRINEVILLE 756 (GOOD)
ENTERPRISE 253 (POOR)
HERMISTON 707 (GOOD)
JOHN DAY 554 (FAIR)
LA GRANDE 416 (FAIR)
MADRAS 834 (GOOD)
MEACHAM 199 (POOR)
PENDLETON 387 (FAIR)
REDMOND 713 (GOOD)
SENECA 520 (FAIR)
THE DALLES 688 (GOOD)
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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