393
AUUS46 KPDT 091225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE SEP 9 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 3-10 MPH. NW 6-8 MPH.
TRANSPORT WINDS SW 6-11 MPH. N 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED SEP 10 FAIR.
OUTLOOK FOR THU SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 63 (POOR). 296 (POOR).
OUTLOOK FOR WED SEP 10 212 (POOR).
OUTLOOK FOR THU SEP 11 278 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 4-8 MPH. W 3-6 MPH.
TRANSPORT WINDS NW 6-11 MPH. N 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED SEP 10 POOR.
OUTLOOK FOR THU SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 65 (POOR). 248 (POOR).
OUTLOOK FOR WED SEP 10 223 (POOR).
OUTLOOK FOR THU SEP 11 187 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. NW 5-7 MPH.
TRANSPORT WINDS NW 4-7 MPH. N 9-11 MPH.
MIXING HEIGHT 4000 FT MSL. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR WED SEP 10 GOOD.
OUTLOOK FOR THU SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 83 (POOR). 419 (FAIR).
OUTLOOK FOR WED SEP 10 471 (FAIR).
OUTLOOK FOR THU SEP 11 232 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-8 MPH. NW 6-8 MPH.
TRANSPORT WINDS SW 6-8 MPH. NW 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED SEP 10 FAIR.
OUTLOOK FOR THU SEP 11 FAIR.
VENTILATION INDEX (CATEGORY) 64 (POOR). 271 (POOR).
OUTLOOK FOR WED SEP 10 204 (POOR).
OUTLOOK FOR THU SEP 11 260 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 276 (POOR)
ELLENSBURG 233 (POOR)
GOLDENDALE 373 (FAIR)
TRI-CITIES 291 (POOR)
WALLA WALLA 221 (POOR)
YAKIMA 238 (POOR)
BEND 188 (POOR)
PRINEVILLE 297 (POOR)
ENTERPRISE 398 (FAIR)
HERMISTON 300 (POOR)
JOHN DAY 366 (FAIR)
LA GRANDE 390 (FAIR)
MADRAS 260 (POOR)
MEACHAM 211 (POOR)
PENDLETON 325 (FAIR)
REDMOND 280 (POOR)
SENECA 285 (POOR)
THE DALLES 392 (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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