862
AUUS46 KPDT 071225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON SEP 7 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 10-22 MPH. SW 10-14 MPH.
TRANSPORT WINDS SW 12-22 MPH. W 13-15 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR TUE SEP 8 POOR.
OUTLOOK FOR WED SEP 9 FAIR.
VENTILATION INDEX (CATEGORY) 166 (POOR). 727 (GOOD).
OUTLOOK FOR TUE SEP 8 113 (POOR).
OUTLOOK FOR WED SEP 9 117 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-9 MPH. NW 3-7 MPH.
TRANSPORT WINDS W 6-12 MPH. W 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE SEP 8 POOR.
OUTLOOK FOR WED SEP 9 FAIR.
VENTILATION INDEX (CATEGORY) 64 (POOR). 471 (FAIR).
OUTLOOK FOR TUE SEP 8 177 (POOR).
OUTLOOK FOR WED SEP 9 135 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 3-8 MPH. SW 1-4 MPH.
TRANSPORT WINDS SW 6-11 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE SEP 8 FAIR.
OUTLOOK FOR WED SEP 9 FAIR.
VENTILATION INDEX (CATEGORY) 106 (POOR). 464 (FAIR).
OUTLOOK FOR TUE SEP 8 154 (POOR).
OUTLOOK FOR WED SEP 9 267 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 10-19 MPH. W 8-13 MPH.
TRANSPORT WINDS SW 14-20 MPH. W 12-16 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR TUE SEP 8 POOR.
OUTLOOK FOR WED SEP 9 FAIR.
VENTILATION INDEX (CATEGORY) 200 (POOR). 723 (GOOD).
OUTLOOK FOR TUE SEP 8 141 (POOR).
OUTLOOK FOR WED SEP 9 207 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 509 (FAIR)
ELLENSBURG 750 (GOOD)
GOLDENDALE 435 (FAIR)
TRI-CITIES 710 (GOOD)
WALLA WALLA 834 (GOOD)
YAKIMA 578 (FAIR)
BEND 238 (POOR)
PRINEVILLE 203 (POOR)
ENTERPRISE 532 (FAIR)
HERMISTON 669 (GOOD)
JOHN DAY 321 (FAIR)
LA GRANDE 533 (FAIR)
MADRAS 219 (POOR)
MEACHAM 560 (FAIR)
PENDLETON 744 (GOOD)
REDMOND 172 (POOR)
SENECA 397 (FAIR)
THE DALLES 541 (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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