988
AUUS46 KPDT 151225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI MAY 15 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 12-24 MPH. W 20-26 MPH.
TRANSPORT WINDS SW 14-24 MPH. W 21-26 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR SAT MAY 16 GOOD.
OUTLOOK FOR SUN MAY 17 FAIR.
VENTILATION INDEX (CATEGORY) 377 (FAIR). 1044 (GOOD).
OUTLOOK FOR SAT MAY 16 1050 (GOOD).
OUTLOOK FOR SUN MAY 17 469 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 7-13 MPH. W 16-23 MPH.
TRANSPORT WINDS W 7-13 MPH. W 19-24 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT MAY 16 GOOD.
OUTLOOK FOR SUN MAY 17 FAIR.
VENTILATION INDEX (CATEGORY) 202 (POOR). 1007 (GOOD).
OUTLOOK FOR SAT MAY 16 1050 (GOOD).
OUTLOOK FOR SUN MAY 17 543 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SW 2-6 MPH. NW 11-13 MPH.
TRANSPORT WINDS W 7-10 MPH. W 15-19 MPH.
MIXING HEIGHT 4500 FT MSL. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT MAY 16 GOOD.
OUTLOOK FOR SUN MAY 17 GOOD.
VENTILATION INDEX (CATEGORY) 262 (POOR). 836 (GOOD).
OUTLOOK FOR SAT MAY 16 969 (GOOD).
OUTLOOK FOR SUN MAY 17 638 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 9-21 MPH. W 15-24 MPH.
TRANSPORT WINDS SW 13-21 MPH. W 19-27 MPH.
MIXING HEIGHT 2000 FT MSL. 6500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SAT MAY 16 GOOD.
OUTLOOK FOR SUN MAY 17 FAIR.
VENTILATION INDEX (CATEGORY) 374 (FAIR). 979 (GOOD).
OUTLOOK FOR SAT MAY 16 1046 (GOOD).
OUTLOOK FOR SUN MAY 17 404 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 712 (GOOD)
ELLENSBURG 640 (GOOD)
GOLDENDALE 1010 (GOOD)
TRI-CITIES 1050 (GOOD)
WALLA WALLA 1050 (GOOD)
YAKIMA 920 (GOOD)
BEND 904 (GOOD)
PRINEVILLE 828 (GOOD)
ENTERPRISE 924 (GOOD)
HERMISTON 1050 (GOOD)
JOHN DAY 977 (GOOD)
LA GRANDE 976 (GOOD)
MADRAS 969 (GOOD)
MEACHAM 808 (GOOD)
PENDLETON 984 (GOOD)
REDMOND 807 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 1045 (GOOD)
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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