482
AUUS46 KPDT 031225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON AUG 3 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 3-8 MPH. N 5-10 MPH.
TRANSPORT WINDS SW 5-9 MPH. NE 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE AUG 4 FAIR.
OUTLOOK FOR WED AUG 5 FAIR.
VENTILATION INDEX (CATEGORY) 57 (POOR). 329 (FAIR).
OUTLOOK FOR TUE AUG 4 484 (FAIR).
OUTLOOK FOR WED AUG 5 258 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 1-4 MPH. E 2-6 MPH.
TRANSPORT WINDS NW 5-10 MPH. NE 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE AUG 4 FAIR.
OUTLOOK FOR WED AUG 5 FAIR.
VENTILATION INDEX (CATEGORY) 53 (POOR). 298 (POOR).
OUTLOOK FOR TUE AUG 4 399 (FAIR).
OUTLOOK FOR WED AUG 5 315 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. N 7-12 MPH.
TRANSPORT WINDS NW 4-8 MPH. N 9-13 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE AUG 4 GOOD.
OUTLOOK FOR WED AUG 5 FAIR.
VENTILATION INDEX (CATEGORY) 64 (POOR). 477 (FAIR).
OUTLOOK FOR TUE AUG 4 410 (FAIR).
OUTLOOK FOR WED AUG 5 67 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-8 MPH. N 6-10 MPH.
TRANSPORT WINDS S 6-11 MPH. N 6-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE AUG 4 FAIR.
OUTLOOK FOR WED AUG 5 FAIR.
VENTILATION INDEX (CATEGORY) 68 (POOR). 340 (FAIR).
OUTLOOK FOR TUE AUG 4 469 (FAIR).
OUTLOOK FOR WED AUG 5 266 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 184 (POOR)
ELLENSBURG 202 (POOR)
GOLDENDALE 448 (FAIR)
TRI-CITIES 322 (FAIR)
WALLA WALLA 277 (POOR)
YAKIMA 265 (POOR)
BEND 275 (POOR)
PRINEVILLE 261 (POOR)
ENTERPRISE 382 (FAIR)
HERMISTON 302 (FAIR)
JOHN DAY 233 (POOR)
LA GRANDE 449 (FAIR)
MADRAS 409 (FAIR)
MEACHAM 293 (POOR)
PENDLETON 343 (FAIR)
REDMOND 341 (FAIR)
SENECA 273 (POOR)
THE DALLES 477 (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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