484
AUUS46 KPDT 221225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU OCT 22 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 0-3 MPH. SW 3-6 MPH.
TRANSPORT WINDS W 2-5 MPH. SW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 23 FAIR.
OUTLOOK FOR SAT OCT 24 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 47 (POOR).
OUTLOOK FOR FRI OCT 23 447 (FAIR).
OUTLOOK FOR SAT OCT 24 57 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. SE 1-4 MPH.
TRANSPORT WINDS NW 2-5 MPH. SE 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 23 FAIR.
OUTLOOK FOR SAT OCT 24 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 43 (POOR).
OUTLOOK FOR FRI OCT 23 223 (POOR).
OUTLOOK FOR SAT OCT 24 66 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 3-7 MPH. W 2-5 MPH.
TRANSPORT WINDS SE 3-6 MPH. SW 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 23 GOOD.
OUTLOOK FOR SAT OCT 24 FAIR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 112 (POOR).
OUTLOOK FOR FRI OCT 23 527 (FAIR).
OUTLOOK FOR SAT OCT 24 178 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 0-3 MPH. W 2-4 MPH.
TRANSPORT WINDS S 3-6 MPH. W 4-9 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 23 FAIR.
OUTLOOK FOR SAT OCT 24 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 52 (POOR).
OUTLOOK FOR FRI OCT 23 469 (FAIR).
OUTLOOK FOR SAT OCT 24 79 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 216 (POOR)
ELLENSBURG 178 (POOR)
GOLDENDALE 133 (POOR)
TRI-CITIES 44 (POOR)
WALLA WALLA 48 (POOR)
YAKIMA 32 (POOR)
BEND 125 (POOR)
PRINEVILLE 95 (POOR)
ENTERPRISE 71 (POOR)
HERMISTON 31 (POOR)
JOHN DAY 79 (POOR)
LA GRANDE 109 (POOR)
MADRAS 79 (POOR)
MEACHAM 51 (POOR)
PENDLETON 46 (POOR)
REDMOND 84 (POOR)
SENECA 37 (POOR)
THE DALLES 176 (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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