754
AUUS46 KPDT 151225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT AUG 15 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 1-5 MPH. N 4-7 MPH.
TRANSPORT WINDS W 4-8 MPH. E 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN AUG 16 FAIR.
OUTLOOK FOR MON AUG 17 FAIR.
VENTILATION INDEX (CATEGORY) 37 (POOR). 186 (POOR).
OUTLOOK FOR SUN AUG 16 312 (FAIR).
OUTLOOK FOR MON AUG 17 309 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-5 MPH. E 3-6 MPH.
TRANSPORT WINDS NW 5-9 MPH. SE 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN AUG 16 FAIR.
OUTLOOK FOR MON AUG 17 FAIR.
VENTILATION INDEX (CATEGORY) 48 (POOR). 303 (FAIR).
OUTLOOK FOR SUN AUG 16 420 (FAIR).
OUTLOOK FOR MON AUG 17 229 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. NW 3-5 MPH.
TRANSPORT WINDS NE 3-6 MPH. SW 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN AUG 16 GOOD.
OUTLOOK FOR MON AUG 17 GOOD.
VENTILATION INDEX (CATEGORY) 29 (POOR). 286 (POOR).
OUTLOOK FOR SUN AUG 16 322 (FAIR).
OUTLOOK FOR MON AUG 17 212 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. NE 4-8 MPH.
TRANSPORT WINDS S 6-9 MPH. E 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN AUG 16 FAIR.
OUTLOOK FOR MON AUG 17 FAIR.
VENTILATION INDEX (CATEGORY) 36 (POOR). 165 (POOR).
OUTLOOK FOR SUN AUG 16 339 (FAIR).
OUTLOOK FOR MON AUG 17 276 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 243 (POOR)
ELLENSBURG 265 (POOR)
GOLDENDALE 234 (POOR)
TRI-CITIES 280 (POOR)
WALLA WALLA 41 (POOR)
YAKIMA 337 (FAIR)
BEND 342 (FAIR)
PRINEVILLE 514 (FAIR)
ENTERPRISE 333 (FAIR)
HERMISTON 152 (POOR)
JOHN DAY 1050 (GOOD)
LA GRANDE 223 (POOR)
MADRAS 339 (FAIR)
MEACHAM 330 (FAIR)
PENDLETON 201 (POOR)
REDMOND 474 (FAIR)
SENECA 1050 (GOOD)
THE DALLES 356 (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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