438
AUUS46 KPDT 161225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI OCT 16 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 0-6 MPH. N 3-7 MPH.
TRANSPORT WINDS SE 3-7 MPH. NE 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT OCT 17 FAIR.
OUTLOOK FOR SUN OCT 18 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 63 (POOR).
OUTLOOK FOR SAT OCT 17 542 (FAIR).
OUTLOOK FOR SUN OCT 18 123 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS N 0-1 MPH. E 2-5 MPH.
TRANSPORT WINDS N 2-5 MPH. SE 4-5 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT OCT 17 FAIR.
OUTLOOK FOR SUN OCT 18 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 70 (POOR).
OUTLOOK FOR SAT OCT 17 488 (FAIR).
OUTLOOK FOR SUN OCT 18 78 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 12-27 MPH. S 22-26 MPH.
TRANSPORT WINDS S 14-27 MPH. S 24-26 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SAT OCT 17 FAIR.
OUTLOOK FOR SUN OCT 18 FAIR.
VENTILATION INDEX (CATEGORY) 137 (POOR). 588 (FAIR).
OUTLOOK FOR SAT OCT 17 305 (FAIR).
OUTLOOK FOR SUN OCT 18 66 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-14 MPH. SE 3-8 MPH.
TRANSPORT WINDS SE 8-19 MPH. S 8-18 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SAT OCT 17 FAIR.
OUTLOOK FOR SUN OCT 18 FAIR.
VENTILATION INDEX (CATEGORY) 51 (POOR). 197 (POOR).
OUTLOOK FOR SAT OCT 17 616 (GOOD).
OUTLOOK FOR SUN OCT 18 129 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 151 (POOR)
ELLENSBURG 112 (POOR)
GOLDENDALE 106 (POOR)
TRI-CITIES 55 (POOR)
WALLA WALLA 106 (POOR)
YAKIMA 73 (POOR)
BEND 373 (FAIR)
PRINEVILLE 454 (FAIR)
ENTERPRISE 160 (POOR)
HERMISTON 48 (POOR)
JOHN DAY 315 (FAIR)
LA GRANDE 496 (FAIR)
MADRAS 394 (FAIR)
MEACHAM 307 (FAIR)
PENDLETON 70 (POOR)
REDMOND 412 (FAIR)
SENECA 338 (FAIR)
THE DALLES 130 (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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