476
AUUS46 KPDT 011225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU OCT 1 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SE 1-5 MPH. N 4-9 MPH.
TRANSPORT WINDS NE 2-5 MPH. N 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 2 FAIR.
OUTLOOK FOR SAT OCT 3 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 142 (POOR).
OUTLOOK FOR FRI OCT 2 261 (POOR).
OUTLOOK FOR SAT OCT 3 129 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. E 2-6 MPH.
TRANSPORT WINDS NW 3-5 MPH. SE 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 2 POOR.
OUTLOOK FOR SAT OCT 3 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 120 (POOR).
OUTLOOK FOR FRI OCT 2 123 (POOR).
OUTLOOK FOR SAT OCT 3 127 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NE 0-1 MPH. N 1-3 MPH.
TRANSPORT WINDS N 2-4 MPH. NW 4-5 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 2 FAIR.
OUTLOOK FOR SAT OCT 3 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 99 (POOR).
OUTLOOK FOR FRI OCT 2 287 (POOR).
OUTLOOK FOR SAT OCT 3 116 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 1-4 MPH. N 3-7 MPH.
TRANSPORT WINDS SE 3-5 MPH. N 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 2 FAIR.
OUTLOOK FOR SAT OCT 3 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 117 (POOR).
OUTLOOK FOR FRI OCT 2 286 (POOR).
OUTLOOK FOR SAT OCT 3 121 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 127 (POOR)
ELLENSBURG 149 (POOR)
GOLDENDALE 152 (POOR)
TRI-CITIES 115 (POOR)
WALLA WALLA 96 (POOR)
YAKIMA 134 (POOR)
BEND 99 (POOR)
PRINEVILLE 70 (POOR)
ENTERPRISE 155 (POOR)
HERMISTON 168 (POOR)
JOHN DAY 179 (POOR)
LA GRANDE 112 (POOR)
MADRAS 151 (POOR)
MEACHAM 100 (POOR)
PENDLETON 142 (POOR)
REDMOND 119 (POOR)
SENECA 252 (POOR)
THE DALLES 162 (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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