199
AUUS46 KPDT 221225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE SEP 22 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 6-16 MPH. SW 9-17 MPH.
TRANSPORT WINDS SW 9-16 MPH. W 11-19 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR WED SEP 23 FAIR.
OUTLOOK FOR THU SEP 24 POOR.
VENTILATION INDEX (CATEGORY) 98 (POOR). 387 (FAIR).
OUTLOOK FOR WED SEP 23 253 (POOR).
OUTLOOK FOR THU SEP 24 108 (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 2-6 MPH.
TRANSPORT WINDS NW 6-12 MPH. W 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED SEP 23 POOR.
OUTLOOK FOR THU SEP 24 POOR.
VENTILATION INDEX (CATEGORY) 47 (POOR). 234 (POOR).
OUTLOOK FOR WED SEP 23 157 (POOR).
OUTLOOK FOR THU SEP 24 63 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SW 0-3 MPH. NW 7-10 MPH.
TRANSPORT WINDS W 4-8 MPH. NW 9-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED SEP 23 FAIR.
OUTLOOK FOR THU SEP 24 GOOD.
VENTILATION INDEX (CATEGORY) 37 (POOR). 267 (POOR).
OUTLOOK FOR WED SEP 23 158 (POOR).
OUTLOOK FOR THU SEP 24 542 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 4-13 MPH. W 8-13 MPH.
TRANSPORT WINDS SW 9-16 MPH. W 12-17 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR WED SEP 23 FAIR.
OUTLOOK FOR THU SEP 24 POOR.
VENTILATION INDEX (CATEGORY) 102 (POOR). 373 (FAIR).
OUTLOOK FOR WED SEP 23 226 (POOR).
OUTLOOK FOR THU SEP 24 106 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 462 (FAIR)
ELLENSBURG 574 (FAIR)
GOLDENDALE 440 (FAIR)
TRI-CITIES 325 (FAIR)
WALLA WALLA 410 (FAIR)
YAKIMA 353 (FAIR)
BEND 282 (POOR)
PRINEVILLE 306 (FAIR)
ENTERPRISE 288 (POOR)
HERMISTON 429 (FAIR)
JOHN DAY 387 (FAIR)
LA GRANDE 303 (FAIR)
MADRAS 253 (POOR)
MEACHAM 241 (POOR)
PENDLETON 449 (FAIR)
REDMOND 341 (FAIR)
SENECA 543 (FAIR)
THE DALLES 578 (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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