110
AUUS46 KPDT 031225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT OCT 3 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 1-4 MPH. N 5-9 MPH.
TRANSPORT WINDS E 3-6 MPH. NE 6-11 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN OCT 4 POOR.
OUTLOOK FOR MON OCT 5 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 142 (POOR).
OUTLOOK FOR SUN OCT 4 104 (POOR).
OUTLOOK FOR MON OCT 5 229 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. NE 2-6 MPH.
TRANSPORT WINDS NW 4-7 MPH. E 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN OCT 4 POOR.
OUTLOOK FOR MON OCT 5 POOR.
VENTILATION INDEX (CATEGORY) 28 (POOR). 149 (POOR).
OUTLOOK FOR SUN OCT 4 68 (POOR).
OUTLOOK FOR MON OCT 5 95 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 0-2 MPH. SE 0-3 MPH.
TRANSPORT WINDS N 3-6 MPH. S 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN OCT 4 FAIR.
OUTLOOK FOR MON OCT 5 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 137 (POOR).
OUTLOOK FOR SUN OCT 4 248 (POOR).
OUTLOOK FOR MON OCT 5 294 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-7 MPH. N 4-8 MPH.
TRANSPORT WINDS SE 5-10 MPH. N 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN OCT 4 POOR.
OUTLOOK FOR MON OCT 5 FAIR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 100 (POOR).
OUTLOOK FOR SUN OCT 4 99 (POOR).
OUTLOOK FOR MON OCT 5 294 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 336 (FAIR)
ELLENSBURG 229 (POOR)
GOLDENDALE 251 (POOR)
TRI-CITIES 147 (POOR)
WALLA WALLA 73 (POOR)
YAKIMA 164 (POOR)
BEND 75 (POOR)
PRINEVILLE 151 (POOR)
ENTERPRISE 116 (POOR)
HERMISTON 189 (POOR)
JOHN DAY 351 (FAIR)
LA GRANDE 135 (POOR)
MADRAS 118 (POOR)
MEACHAM 96 (POOR)
PENDLETON 151 (POOR)
REDMOND 48 (POOR)
SENECA 433 (FAIR)
THE DALLES 277 (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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