697
AUUS46 KPDT 191325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST WED NOV 19 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 1-3 MPH. N 4-8 MPH.
TRANSPORT WINDS SE 3-4 MPH. NE 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU NOV 20 POOR.
OUTLOOK FOR FRI NOV 21 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 97 (POOR).
OUTLOOK FOR THU NOV 20 68 (POOR).
OUTLOOK FOR FRI NOV 21 119 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-3 MPH. E 3-7 MPH.
TRANSPORT WINDS NW 3-6 MPH. E 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU NOV 20 POOR.
OUTLOOK FOR FRI NOV 21 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 89 (POOR).
OUTLOOK FOR THU NOV 20 51 (POOR).
OUTLOOK FOR FRI NOV 21 45 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 1-3 MPH. E 2-5 MPH.
TRANSPORT WINDS N 3-5 MPH. S 8-11 MPH.
MIXING HEIGHT 4000 FT MSL. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU NOV 20 FAIR.
OUTLOOK FOR FRI NOV 21 FAIR.
VENTILATION INDEX (CATEGORY) 40 (POOR). 139 (POOR).
OUTLOOK FOR THU NOV 20 96 (POOR).
OUTLOOK FOR FRI NOV 21 89 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS E 1-4 MPH. N 3-6 MPH.
TRANSPORT WINDS SE 3-5 MPH. NE 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU NOV 20 POOR.
OUTLOOK FOR FRI NOV 21 POOR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 88 (POOR).
OUTLOOK FOR THU NOV 20 60 (POOR).
OUTLOOK FOR FRI NOV 21 151 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 418 (FAIR)
ELLENSBURG 221 (POOR)
GOLDENDALE 271 (POOR)
TRI-CITIES 97 (POOR)
WALLA WALLA 68 (POOR)
YAKIMA 86 (POOR)
BEND 183 (POOR)
PRINEVILLE 261 (POOR)
ENTERPRISE 141 (POOR)
HERMISTON 108 (POOR)
JOHN DAY 258 (POOR)
LA GRANDE 163 (POOR)
MADRAS 54 (POOR)
MEACHAM 123 (POOR)
PENDLETON 119 (POOR)
REDMOND 104 (POOR)
SENECA 340 (FAIR)
THE DALLES 314 (FAIR)
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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