384
AUUS46 KPDT 131225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED MAY 13 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 20-37 MPH. SW 31-38 MPH.
TRANSPORT WINDS SW 23-38 MPH. W 34-39 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU MAY 14 GOOD.
OUTLOOK FOR FRI MAY 15 GOOD.
VENTILATION INDEX (CATEGORY) 331 (FAIR). 1050 (GOOD).
OUTLOOK FOR THU MAY 14 1050 (GOOD).
OUTLOOK FOR FRI MAY 15 1050 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 14-23 MPH. W 24-30 MPH.
TRANSPORT WINDS W 14-23 MPH. W 32-39 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU MAY 14 GOOD.
OUTLOOK FOR FRI MAY 15 GOOD.
VENTILATION INDEX (CATEGORY) 291 (POOR). 1050 (GOOD).
OUTLOOK FOR THU MAY 14 968 (GOOD).
OUTLOOK FOR FRI MAY 15 1043 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 9-13 MPH. W 20-24 MPH.
TRANSPORT WINDS W 10-14 MPH. W 23-30 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU MAY 14 GOOD.
OUTLOOK FOR FRI MAY 15 GOOD.
VENTILATION INDEX (CATEGORY) 170 (POOR). 877 (GOOD).
OUTLOOK FOR THU MAY 14 933 (GOOD).
OUTLOOK FOR FRI MAY 15 995 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 17-36 MPH. W 27-39 MPH.
TRANSPORT WINDS SW 19-35 MPH. W 31-42 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR THU MAY 14 GOOD.
OUTLOOK FOR FRI MAY 15 GOOD.
VENTILATION INDEX (CATEGORY) 295 (POOR). 1046 (GOOD).
OUTLOOK FOR THU MAY 14 1050 (GOOD).
OUTLOOK FOR FRI MAY 15 1050 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 864 (GOOD)
ELLENSBURG 1050 (GOOD)
GOLDENDALE 1050 (GOOD)
TRI-CITIES 1050 (GOOD)
WALLA WALLA 1050 (GOOD)
YAKIMA 1050 (GOOD)
BEND 1050 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 933 (GOOD)
HERMISTON 1050 (GOOD)
JOHN DAY 1050 (GOOD)
LA GRANDE 1050 (GOOD)
MADRAS 1050 (GOOD)
MEACHAM 1050 (GOOD)
PENDLETON 1050 (GOOD)
REDMOND 1050 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 1050 (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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