479
AUUS46 KPDT 291325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST SAT NOV 29 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS NE 2-6 MPH. NW 4-8 MPH.
TRANSPORT WINDS NE 3-7 MPH. N 4-9 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN NOV 30 POOR.
OUTLOOK FOR MON DEC 1 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 59 (POOR).
OUTLOOK FOR SUN NOV 30 72 (POOR).
OUTLOOK FOR MON DEC 1 32 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS N 2-5 MPH. N 3-7 MPH.
TRANSPORT WINDS N 3-7 MPH. N 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN NOV 30 POOR.
OUTLOOK FOR MON DEC 1 POOR.
VENTILATION INDEX (CATEGORY) 30 (POOR). 91 (POOR).
OUTLOOK FOR SUN NOV 30 42 (POOR).
OUTLOOK FOR MON DEC 1 38 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 1-3 MPH. S 7-12 MPH.
TRANSPORT WINDS SE 3-6 MPH. S 16-23 MPH.
MIXING HEIGHT 4000 FT MSL. 5000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN NOV 30 FAIR.
OUTLOOK FOR MON DEC 1 POOR.
VENTILATION INDEX (CATEGORY) 59 (POOR). 301 (FAIR).
OUTLOOK FOR SUN NOV 30 160 (POOR).
OUTLOOK FOR MON DEC 1 120 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS E 3-7 MPH. NW 2-5 MPH.
TRANSPORT WINDS SE 4-8 MPH. E 3-7 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN NOV 30 POOR.
OUTLOOK FOR MON DEC 1 POOR.
VENTILATION INDEX (CATEGORY) 31 (POOR). 40 (POOR).
OUTLOOK FOR SUN NOV 30 86 (POOR).
OUTLOOK FOR MON DEC 1 51 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 210 (POOR)
ELLENSBURG 80 (POOR)
GOLDENDALE 118 (POOR)
TRI-CITIES 103 (POOR)
WALLA WALLA 27 (POOR)
YAKIMA 108 (POOR)
BEND 103 (POOR)
PRINEVILLE 68 (POOR)
ENTERPRISE 59 (POOR)
HERMISTON 55 (POOR)
JOHN DAY 228 (POOR)
LA GRANDE 366 (FAIR)
MADRAS 40 (POOR)
MEACHAM 97 (POOR)
PENDLETON 50 (POOR)
REDMOND 26 (POOR)
SENECA 271 (POOR)
THE DALLES 146 (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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