746
AUUS46 KPDT 081225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU OCT 8 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 0-5 MPH. W 2-5 MPH.
TRANSPORT WINDS S 3-6 MPH. W 4-5 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 9 GOOD.
OUTLOOK FOR SAT OCT 10 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 70 (POOR).
OUTLOOK FOR FRI OCT 9 745 (GOOD).
OUTLOOK FOR SAT OCT 10 300 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-1 MPH. SE 2-5 MPH.
TRANSPORT WINDS NW 2-4 MPH. S 4-5 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 9 GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 71 (POOR).
OUTLOOK FOR FRI OCT 9 748 (GOOD).
OUTLOOK FOR SAT OCT 10 271 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NE 0-1 MPH. SE 1-3 MPH.
TRANSPORT WINDS N 2-4 MPH. W 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI OCT 9 GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 107 (POOR).
OUTLOOK FOR FRI OCT 9 577 (FAIR).
OUTLOOK FOR SAT OCT 10 353 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 2-6 MPH. NW 2-4 MPH.
TRANSPORT WINDS SE 3-6 MPH. W 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI OCT 9 GOOD.
OUTLOOK FOR SAT OCT 10 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 82 (POOR).
OUTLOOK FOR FRI OCT 9 823 (GOOD).
OUTLOOK FOR SAT OCT 10 328 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 248 (POOR)
ELLENSBURG 155 (POOR)
GOLDENDALE 102 (POOR)
TRI-CITIES 72 (POOR)
WALLA WALLA 70 (POOR)
YAKIMA 61 (POOR)
BEND 155 (POOR)
PRINEVILLE 108 (POOR)
ENTERPRISE 184 (POOR)
HERMISTON 47 (POOR)
JOHN DAY 328 (FAIR)
LA GRANDE 103 (POOR)
MADRAS 64 (POOR)
MEACHAM 111 (POOR)
PENDLETON 70 (POOR)
REDMOND 86 (POOR)
SENECA 640 (GOOD)
THE DALLES 32 (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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