052
AUUS46 KPDT 071225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED OCT 7 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 1-4 MPH. N 3-7 MPH.
TRANSPORT WINDS E 2-5 MPH. N 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU OCT 8 POOR.
OUTLOOK FOR FRI OCT 9 GOOD.
VENTILATION INDEX (CATEGORY) 25 (POOR). 94 (POOR).
OUTLOOK FOR THU OCT 8 102 (POOR).
OUTLOOK FOR FRI OCT 9 775 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. E 1-5 MPH.
TRANSPORT WINDS NW 3-5 MPH. E 2-5 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU OCT 8 POOR.
OUTLOOK FOR FRI OCT 9 GOOD.
VENTILATION INDEX (CATEGORY) 25 (POOR). 60 (POOR).
OUTLOOK FOR THU OCT 8 85 (POOR).
OUTLOOK FOR FRI OCT 9 636 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 0-1 MPH. NW 0-2 MPH.
TRANSPORT WINDS E 2-4 MPH. W 4-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU OCT 8 FAIR.
OUTLOOK FOR FRI OCT 9 GOOD.
VENTILATION INDEX (CATEGORY) 25 (POOR). 92 (POOR).
OUTLOOK FOR THU OCT 8 118 (POOR).
OUTLOOK FOR FRI OCT 9 598 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 1-4 MPH. NW 3-6 MPH.
TRANSPORT WINDS SE 3-6 MPH. NW 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU OCT 8 POOR.
OUTLOOK FOR FRI OCT 9 GOOD.
VENTILATION INDEX (CATEGORY) 25 (POOR). 84 (POOR).
OUTLOOK FOR THU OCT 8 115 (POOR).
OUTLOOK FOR FRI OCT 9 844 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 50 (POOR)
ELLENSBURG 47 (POOR)
GOLDENDALE 97 (POOR)
TRI-CITIES 89 (POOR)
WALLA WALLA 60 (POOR)
YAKIMA 51 (POOR)
BEND 114 (POOR)
PRINEVILLE 108 (POOR)
ENTERPRISE 160 (POOR)
HERMISTON 83 (POOR)
JOHN DAY 379 (FAIR)
LA GRANDE 56 (POOR)
MADRAS 104 (POOR)
MEACHAM 85 (POOR)
PENDLETON 108 (POOR)
REDMOND 101 (POOR)
SENECA 601 (GOOD)
THE DALLES 103 (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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