451
AUUS46 KPDT 111225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI JUL 11 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 3-7 MPH. N 5-9 MPH.
TRANSPORT WINDS W 6-10 MPH. N 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUL 12 FAIR.
OUTLOOK FOR SUN JUL 13 FAIR.
VENTILATION INDEX (CATEGORY) 82 (POOR). 380 (FAIR).
OUTLOOK FOR SAT JUL 12 400 (FAIR).
OUTLOOK FOR SUN JUL 13 549 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 4-8 MPH. W 5-7 MPH.
TRANSPORT WINDS NW 7-13 MPH. NW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT JUL 12 POOR.
OUTLOOK FOR SUN JUL 13 GOOD.
VENTILATION INDEX (CATEGORY) 134 (POOR). 284 (POOR).
OUTLOOK FOR SAT JUL 12 245 (POOR).
OUTLOOK FOR SUN JUL 13 777 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. NW 9-12 MPH.
TRANSPORT WINDS NW 5-7 MPH. N 9-12 MPH.
MIXING HEIGHT 4000 FT MSL. 11000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT JUL 12 GOOD.
OUTLOOK FOR SUN JUL 13 GOOD.
VENTILATION INDEX (CATEGORY) 120 (POOR). 632 (GOOD).
OUTLOOK FOR SAT JUL 12 253 (POOR).
OUTLOOK FOR SUN JUL 13 495 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-8 MPH. NW 7-9 MPH.
TRANSPORT WINDS SW 6-10 MPH. N 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT JUL 12 FAIR.
OUTLOOK FOR SUN JUL 13 FAIR.
VENTILATION INDEX (CATEGORY) 82 (POOR). 394 (FAIR).
OUTLOOK FOR SAT JUL 12 372 (FAIR).
OUTLOOK FOR SUN JUL 13 528 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 434 (FAIR)
ELLENSBURG 448 (FAIR)
GOLDENDALE 321 (FAIR)
TRI-CITIES 359 (FAIR)
WALLA WALLA 319 (FAIR)
YAKIMA 238 (POOR)
BEND 268 (POOR)
PRINEVILLE 422 (FAIR)
ENTERPRISE 396 (FAIR)
HERMISTON 328 (FAIR)
JOHN DAY 352 (FAIR)
LA GRANDE 600 (FAIR)
MADRAS 423 (FAIR)
MEACHAM 300 (POOR)
PENDLETON 394 (FAIR)
REDMOND 417 (FAIR)
SENECA 370 (FAIR)
THE DALLES 275 (POOR)
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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