307
AUUS46 KPDT 161225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON MAR 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 S 4-9 MPH. SW 7-12 MPH.
TRANSPORT WINDS S 6-13 MPH. SW 9-16 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE MAR 17 GOOD.
OUTLOOK FOR WED MAR 18 GOOD.
VENTILATION INDEX (CATEGORY) 42 (POOR). 138 (POOR).
OUTLOOK FOR TUE MAR 17 247 (POOR).
OUTLOOK FOR WED MAR 18 403 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. SW 5-10 MPH.
TRANSPORT WINDS SW 2-8 MPH. SW 7-14 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE MAR 17 GOOD.
OUTLOOK FOR WED MAR 18 GOOD.
VENTILATION INDEX (CATEGORY) 32 (POOR). 94 (POOR).
OUTLOOK FOR TUE MAR 17 367 (FAIR).
OUTLOOK FOR WED MAR 18 343 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 7-10 MPH. S 8-11 MPH.
TRANSPORT WINDS S 9-11 MPH. SW 10-14 MPH.
MIXING HEIGHT 4000 FT MSL. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE MAR 17 GOOD.
OUTLOOK FOR WED MAR 18 GOOD.
VENTILATION INDEX (CATEGORY) 113 (POOR). 240 (POOR).
OUTLOOK FOR TUE MAR 17 291 (POOR).
OUTLOOK FOR WED MAR 18 899 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 5-10 MPH. S 8-16 MPH.
TRANSPORT WINDS S 10-18 MPH. SW 10-21 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR TUE MAR 17 GOOD.
OUTLOOK FOR WED MAR 18 GOOD.
VENTILATION INDEX (CATEGORY) 78 (POOR). 201 (POOR).
OUTLOOK FOR TUE MAR 17 308 (FAIR).
OUTLOOK FOR WED MAR 18 576 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 180 (POOR)
ELLENSBURG 73 (POOR)
GOLDENDALE 267 (POOR)
TRI-CITIES 178 (POOR)
WALLA WALLA 125 (POOR)
YAKIMA 74 (POOR)
BEND 465 (FAIR)
PRINEVILLE 308 (FAIR)
ENTERPRISE 241 (POOR)
HERMISTON 142 (POOR)
JOHN DAY 276 (POOR)
LA GRANDE 243 (POOR)
MADRAS 466 (FAIR)
MEACHAM 226 (POOR)
PENDLETON 132 (POOR)
REDMOND 302 (FAIR)
SENECA 439 (FAIR)
THE DALLES 127 (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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