944
AUUS46 KPDT 211225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED OCT 21 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 1-5 MPH. N 2-5 MPH.
TRANSPORT WINDS S 2-5 MPH. N 3-5 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU OCT 22 POOR.
OUTLOOK FOR FRI OCT 23 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 50 (POOR).
OUTLOOK FOR THU OCT 22 56 (POOR).
OUTLOOK FOR FRI OCT 23 404 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-1 MPH. E 2-5 MPH.
TRANSPORT WINDS NW 2-5 MPH. SE 2-4 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU OCT 22 POOR.
OUTLOOK FOR FRI OCT 23 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 52 (POOR).
OUTLOOK FOR THU OCT 22 46 (POOR).
OUTLOOK FOR FRI OCT 23 244 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 2-5 MPH. S 8-12 MPH.
TRANSPORT WINDS S 2-5 MPH. S 13-14 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU OCT 22 FAIR.
OUTLOOK FOR FRI OCT 23 FAIR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 372 (FAIR).
OUTLOOK FOR THU OCT 22 114 (POOR).
OUTLOOK FOR FRI OCT 23 442 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 1-4 MPH. N 2-4 MPH.
TRANSPORT WINDS S 4-6 MPH. N 3-5 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU OCT 22 POOR.
OUTLOOK FOR FRI OCT 23 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 44 (POOR).
OUTLOOK FOR THU OCT 22 46 (POOR).
OUTLOOK FOR FRI OCT 23 414 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 91 (POOR)
ELLENSBURG 69 (POOR)
GOLDENDALE 62 (POOR)
TRI-CITIES 37 (POOR)
WALLA WALLA 52 (POOR)
YAKIMA 61 (POOR)
BEND 134 (POOR)
PRINEVILLE 140 (POOR)
ENTERPRISE 224 (POOR)
HERMISTON 38 (POOR)
JOHN DAY 308 (FAIR)
LA GRANDE 336 (FAIR)
MADRAS 29 (POOR)
MEACHAM 140 (POOR)
PENDLETON 67 (POOR)
REDMOND 116 (POOR)
SENECA 389 (FAIR)
THE DALLES 81 (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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