556
AUUS46 KPDT 081325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST SAT NOV 8 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 2-6 MPH. N 5-9 MPH.
TRANSPORT WINDS SE 3-6 MPH. NE 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN NOV 9 POOR.
OUTLOOK FOR MON NOV 10 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 108 (POOR).
OUTLOOK FOR SUN NOV 9 45 (POOR).
OUTLOOK FOR MON NOV 10 93 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. NE 3-7 MPH.
TRANSPORT WINDS N 2-5 MPH. NE 4-9 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN NOV 9 POOR.
OUTLOOK FOR MON NOV 10 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 87 (POOR).
OUTLOOK FOR SUN NOV 9 39 (POOR).
OUTLOOK FOR MON NOV 10 55 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 2-4 MPH. S 3-7 MPH.
TRANSPORT WINDS SE 4-7 MPH. S 10-13 MPH.
MIXING HEIGHT 4000 FT MSL. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN NOV 9 GOOD.
OUTLOOK FOR MON NOV 10 FAIR.
VENTILATION INDEX (CATEGORY) 68 (POOR). 271 (POOR).
OUTLOOK FOR SUN NOV 9 377 (FAIR).
OUTLOOK FOR MON NOV 10 269 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 4-8 MPH. N 3-6 MPH.
TRANSPORT WINDS SE 6-11 MPH. NE 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN NOV 9 POOR.
OUTLOOK FOR MON NOV 10 FAIR.
VENTILATION INDEX (CATEGORY) 45 (POOR). 83 (POOR).
OUTLOOK FOR SUN NOV 9 49 (POOR).
OUTLOOK FOR MON NOV 10 140 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 303 (FAIR)
ELLENSBURG 140 (POOR)
GOLDENDALE 200 (POOR)
TRI-CITIES 126 (POOR)
WALLA WALLA 74 (POOR)
YAKIMA 84 (POOR)
BEND 107 (POOR)
PRINEVILLE 228 (POOR)
ENTERPRISE 84 (POOR)
HERMISTON 131 (POOR)
JOHN DAY 227 (POOR)
LA GRANDE 269 (POOR)
MADRAS 60 (POOR)
MEACHAM 116 (POOR)
PENDLETON 114 (POOR)
REDMOND 106 (POOR)
SENECA 196 (POOR)
THE DALLES 262 (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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