349
AUUS46 KPDT 191225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE AUG 19 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 5-11 MPH. NW 7-10 MPH.
TRANSPORT WINDS SW 7-12 MPH. W 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 20 FAIR.
OUTLOOK FOR THU AUG 21 FAIR.
VENTILATION INDEX (CATEGORY) 96 (POOR). 288 (POOR).
OUTLOOK FOR WED AUG 20 387 (FAIR).
OUTLOOK FOR THU AUG 21 222 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-7 MPH. SE 4-8 MPH.
TRANSPORT WINDS NW 5-9 MPH. SW 6-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 20 POOR.
OUTLOOK FOR THU AUG 21 POOR.
VENTILATION INDEX (CATEGORY) 64 (POOR). 340 (FAIR).
OUTLOOK FOR WED AUG 20 288 (POOR).
OUTLOOK FOR THU AUG 21 218 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. NW 7-9 MPH.
TRANSPORT WINDS NW 4-8 MPH. W 7-9 MPH.
MIXING HEIGHT 4000 FT MSL. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR WED AUG 20 GOOD.
OUTLOOK FOR THU AUG 21 GOOD.
VENTILATION INDEX (CATEGORY) 71 (POOR). 264 (POOR).
OUTLOOK FOR WED AUG 20 411 (FAIR).
OUTLOOK FOR THU AUG 21 289 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-10 MPH. NW 7-9 MPH.
TRANSPORT WINDS S 7-12 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED AUG 20 FAIR.
OUTLOOK FOR THU AUG 21 FAIR.
VENTILATION INDEX (CATEGORY) 91 (POOR). 251 (POOR).
OUTLOOK FOR WED AUG 20 407 (FAIR).
OUTLOOK FOR THU AUG 21 286 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 524 (FAIR)
ELLENSBURG 549 (FAIR)
GOLDENDALE 502 (FAIR)
TRI-CITIES 252 (POOR)
WALLA WALLA 210 (POOR)
YAKIMA 380 (FAIR)
BEND 380 (FAIR)
PRINEVILLE 334 (FAIR)
ENTERPRISE 358 (FAIR)
HERMISTON 221 (POOR)
JOHN DAY 595 (FAIR)
LA GRANDE 296 (POOR)
MADRAS 269 (POOR)
MEACHAM 181 (POOR)
PENDLETON 277 (POOR)
REDMOND 347 (FAIR)
SENECA 893 (GOOD)
THE DALLES 539 (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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