394
AUUS46 KPDT 261225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT SEP 26 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 3-10 MPH. N 3-6 MPH.
TRANSPORT WINDS SW 7-13 MPH. N 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 27 POOR.
OUTLOOK FOR MON SEP 28 FAIR.
VENTILATION INDEX (CATEGORY) 71 (POOR). 116 (POOR).
OUTLOOK FOR SUN SEP 27 172 (POOR).
OUTLOOK FOR MON SEP 28 203 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-5 MPH. E 2-6 MPH.
TRANSPORT WINDS W 3-7 MPH. E 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 27 POOR.
OUTLOOK FOR MON SEP 28 POOR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 126 (POOR).
OUTLOOK FOR SUN SEP 27 185 (POOR).
OUTLOOK FOR MON SEP 28 98 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. N 1-4 MPH.
TRANSPORT WINDS W 3-6 MPH. NW 3-5 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 27 FAIR.
OUTLOOK FOR MON SEP 28 FAIR.
VENTILATION INDEX (CATEGORY) 40 (POOR). 138 (POOR).
OUTLOOK FOR SUN SEP 27 114 (POOR).
OUTLOOK FOR MON SEP 28 208 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 4-12 MPH. NW 3-5 MPH.
TRANSPORT WINDS SW 8-15 MPH. NW 4-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 27 POOR.
OUTLOOK FOR MON SEP 28 FAIR.
VENTILATION INDEX (CATEGORY) 92 (POOR). 142 (POOR).
OUTLOOK FOR SUN SEP 27 126 (POOR).
OUTLOOK FOR MON SEP 28 193 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 191 (POOR)
ELLENSBURG 200 (POOR)
GOLDENDALE 162 (POOR)
TRI-CITIES 38 (POOR)
WALLA WALLA 181 (POOR)
YAKIMA 119 (POOR)
BEND 211 (POOR)
PRINEVILLE 173 (POOR)
ENTERPRISE 108 (POOR)
HERMISTON 128 (POOR)
JOHN DAY 201 (POOR)
LA GRANDE 121 (POOR)
MADRAS 228 (POOR)
MEACHAM 112 (POOR)
PENDLETON 108 (POOR)
REDMOND 216 (POOR)
SENECA 276 (POOR)
THE DALLES 115 (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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