859
AUUS46 KPDT 121225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT SEP 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 S 1-5 MPH. N 6-10 MPH.
TRANSPORT WINDS SW 3-6 MPH. N 6-10 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN SEP 13 GOOD.
OUTLOOK FOR MON SEP 14 FAIR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 192 (POOR).
OUTLOOK FOR SUN SEP 13 610 (GOOD).
OUTLOOK FOR MON SEP 14 405 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. NE 5-9 MPH.
TRANSPORT WINDS NW 4-8 MPH. E 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN SEP 13 FAIR.
OUTLOOK FOR MON SEP 14 POOR.
VENTILATION INDEX (CATEGORY) 37 (POOR). 282 (POOR).
OUTLOOK FOR SUN SEP 13 188 (POOR).
OUTLOOK FOR MON SEP 14 101 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. SE 4-9 MPH.
TRANSPORT WINDS SE 2-4 MPH. S 12-16 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN SEP 13 GOOD.
OUTLOOK FOR MON SEP 14 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 571 (FAIR).
OUTLOOK FOR SUN SEP 13 652 (GOOD).
OUTLOOK FOR MON SEP 14 298 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. N 7-9 MPH.
TRANSPORT WINDS S 3-6 MPH. N 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN SEP 13 GOOD.
OUTLOOK FOR MON SEP 14 FAIR.
VENTILATION INDEX (CATEGORY) 28 (POOR). 133 (POOR).
OUTLOOK FOR SUN SEP 13 659 (GOOD).
OUTLOOK FOR MON SEP 14 408 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 762 (GOOD)
ELLENSBURG 676 (GOOD)
GOLDENDALE 278 (POOR)
TRI-CITIES 175 (POOR)
WALLA WALLA 136 (POOR)
YAKIMA 420 (FAIR)
BEND 578 (FAIR)
PRINEVILLE 434 (FAIR)
ENTERPRISE 497 (FAIR)
HERMISTON 221 (POOR)
JOHN DAY 1050 (GOOD)
LA GRANDE 528 (FAIR)
MADRAS 259 (POOR)
MEACHAM 181 (POOR)
PENDLETON 221 (POOR)
REDMOND 383 (FAIR)
SENECA 1050 (GOOD)
THE DALLES 87 (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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