121
AUUS46 KPDT 141225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON SEP 14 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 7-17 MPH. SW 5-9 MPH.
TRANSPORT WINDS SW 11-19 MPH. SW 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR TUE SEP 15 FAIR.
OUTLOOK FOR WED SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 151 (POOR). 420 (FAIR).
OUTLOOK FOR TUE SEP 15 123 (POOR).
OUTLOOK FOR WED SEP 16 247 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-7 MPH. SE 3-8 MPH.
TRANSPORT WINDS W 4-9 MPH. S 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE SEP 15 POOR.
OUTLOOK FOR WED SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 34 (POOR). 122 (POOR).
OUTLOOK FOR TUE SEP 15 154 (POOR).
OUTLOOK FOR WED SEP 16 410 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 3-6 MPH. S 1-4 MPH.
TRANSPORT WINDS W 6-11 MPH. W 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE SEP 15 FAIR.
OUTLOOK FOR WED SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 90 (POOR). 237 (POOR).
OUTLOOK FOR TUE SEP 15 186 (POOR).
OUTLOOK FOR WED SEP 16 413 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 7-16 MPH. W 4-8 MPH.
TRANSPORT WINDS SW 12-20 MPH. SW 8-14 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR TUE SEP 15 FAIR.
OUTLOOK FOR WED SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 180 (POOR). 406 (FAIR).
OUTLOOK FOR TUE SEP 15 138 (POOR).
OUTLOOK FOR WED SEP 16 219 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 328 (FAIR)
ELLENSBURG 331 (FAIR)
GOLDENDALE 319 (FAIR)
TRI-CITIES 328 (FAIR)
WALLA WALLA 486 (FAIR)
YAKIMA 116 (POOR)
BEND 145 (POOR)
PRINEVILLE 136 (POOR)
ENTERPRISE 281 (POOR)
HERMISTON 476 (FAIR)
JOHN DAY 252 (POOR)
LA GRANDE 275 (POOR)
MADRAS 148 (POOR)
MEACHAM 273 (POOR)
PENDLETON 410 (FAIR)
REDMOND 132 (POOR)
SENECA 293 (POOR)
THE DALLES 439 (FAIR)
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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