419
AUUS46 KPDT 161225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED SEP 16 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 1-5 MPH. N 7-11 MPH.
TRANSPORT WINDS NW 3-8 MPH. N 11-15 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU SEP 17 POOR.
OUTLOOK FOR FRI SEP 18 FAIR.
VENTILATION INDEX (CATEGORY) 32 (POOR). 328 (FAIR).
OUTLOOK FOR THU SEP 17 132 (POOR).
OUTLOOK FOR FRI SEP 18 269 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. NE 6-11 MPH.
TRANSPORT WINDS NW 6-11 MPH. NE 11-16 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU SEP 17 POOR.
OUTLOOK FOR FRI SEP 18 POOR.
VENTILATION INDEX (CATEGORY) 56 (POOR). 470 (FAIR).
OUTLOOK FOR THU SEP 17 161 (POOR).
OUTLOOK FOR FRI SEP 18 108 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 7-14 MPH. N 12-16 MPH.
TRANSPORT WINDS N 10-16 MPH. N 14-16 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU SEP 17 FAIR.
OUTLOOK FOR FRI SEP 18 FAIR.
VENTILATION INDEX (CATEGORY) 92 (POOR). 463 (FAIR).
OUTLOOK FOR THU SEP 17 65 (POOR).
OUTLOOK FOR FRI SEP 18 69 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 0-3 MPH. N 7-10 MPH.
TRANSPORT WINDS S 2-5 MPH. NE 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU SEP 17 POOR.
OUTLOOK FOR FRI SEP 18 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 236 (POOR).
OUTLOOK FOR THU SEP 17 121 (POOR).
OUTLOOK FOR FRI SEP 18 287 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 401 (FAIR)
ELLENSBURG 345 (FAIR)
GOLDENDALE 639 (GOOD)
TRI-CITIES 462 (FAIR)
WALLA WALLA 199 (POOR)
YAKIMA 544 (FAIR)
BEND 568 (FAIR)
PRINEVILLE 478 (FAIR)
ENTERPRISE 310 (FAIR)
HERMISTON 350 (FAIR)
JOHN DAY 499 (FAIR)
LA GRANDE 447 (FAIR)
MADRAS 710 (GOOD)
MEACHAM 231 (POOR)
PENDLETON 313 (FAIR)
REDMOND 590 (FAIR)
SENECA 664 (GOOD)
THE DALLES 530 (FAIR)
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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