142
AUUS46 KPDT 151225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED JUL 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 SE 3-8 MPH. N 5-10 MPH.
TRANSPORT WINDS SW 6-11 MPH. NE 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUL 16 FAIR.
OUTLOOK FOR FRI JUL 17 FAIR.
VENTILATION INDEX (CATEGORY) 67 (POOR). 390 (FAIR).
OUTLOOK FOR THU JUL 16 401 (FAIR).
OUTLOOK FOR FRI JUL 17 389 (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 4-8 MPH.
TRANSPORT WINDS NW 4-8 MPH. SE 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUL 16 FAIR.
OUTLOOK FOR FRI JUL 17 FAIR.
VENTILATION INDEX (CATEGORY) 47 (POOR). 366 (FAIR).
OUTLOOK FOR THU JUL 16 279 (POOR).
OUTLOOK FOR FRI JUL 17 276 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. N 4-5 MPH.
TRANSPORT WINDS NW 4-7 MPH. NE 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 12000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU JUL 16 GOOD.
OUTLOOK FOR FRI JUL 17 FAIR.
VENTILATION INDEX (CATEGORY) 45 (POOR). 461 (FAIR).
OUTLOOK FOR THU JUL 16 745 (GOOD).
OUTLOOK FOR FRI JUL 17 237 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-8 MPH. N 6-11 MPH.
TRANSPORT WINDS S 7-13 MPH. NE 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUL 16 FAIR.
OUTLOOK FOR FRI JUL 17 FAIR.
VENTILATION INDEX (CATEGORY) 75 (POOR). 525 (FAIR).
OUTLOOK FOR THU JUL 16 353 (FAIR).
OUTLOOK FOR FRI JUL 17 285 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 295 (POOR)
ELLENSBURG 554 (FAIR)
GOLDENDALE 333 (FAIR)
TRI-CITIES 222 (POOR)
WALLA WALLA 403 (FAIR)
YAKIMA 433 (FAIR)
BEND 456 (FAIR)
PRINEVILLE 398 (FAIR)
ENTERPRISE 438 (FAIR)
HERMISTON 339 (FAIR)
JOHN DAY 421 (FAIR)
LA GRANDE 451 (FAIR)
MADRAS 292 (POOR)
MEACHAM 476 (FAIR)
PENDLETON 526 (FAIR)
REDMOND 337 (FAIR)
SENECA 708 (GOOD)
THE DALLES 215 (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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