293
AUUS46 KPDT 091225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU JUL 9 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 5-13 MPH. W 6-11 MPH.
TRANSPORT WINDS SW 7-13 MPH. W 6-11 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUL 10 GOOD.
OUTLOOK FOR SAT JUL 11 FAIR.
VENTILATION INDEX (CATEGORY) 127 (POOR). 405 (FAIR).
OUTLOOK FOR FRI JUL 10 633 (GOOD).
OUTLOOK FOR SAT JUL 11 535 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. SW 4-7 MPH.
TRANSPORT WINDS NW 5-10 MPH. W 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI JUL 10 FAIR.
OUTLOOK FOR SAT JUL 11 GOOD.
VENTILATION INDEX (CATEGORY) 63 (POOR). 297 (POOR).
OUTLOOK FOR FRI JUL 10 552 (FAIR).
OUTLOOK FOR SAT JUL 11 605 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SW 1-3 MPH. NW 4-8 MPH.
TRANSPORT WINDS W 4-8 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUL 10 GOOD.
OUTLOOK FOR SAT JUL 11 GOOD.
VENTILATION INDEX (CATEGORY) 70 (POOR). 358 (FAIR).
OUTLOOK FOR FRI JUL 10 500 (FAIR).
OUTLOOK FOR SAT JUL 11 478 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 5-14 MPH. W 7-10 MPH.
TRANSPORT WINDS SW 8-15 MPH. W 8-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUL 10 FAIR.
OUTLOOK FOR SAT JUL 11 FAIR.
VENTILATION INDEX (CATEGORY) 131 (POOR). 396 (FAIR).
OUTLOOK FOR FRI JUL 10 541 (FAIR).
OUTLOOK FOR SAT JUL 11 409 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 482 (FAIR)
ELLENSBURG 934 (GOOD)
GOLDENDALE 543 (FAIR)
TRI-CITIES 322 (FAIR)
WALLA WALLA 394 (FAIR)
YAKIMA 322 (FAIR)
BEND 335 (FAIR)
PRINEVILLE 359 (FAIR)
ENTERPRISE 349 (FAIR)
HERMISTON 346 (FAIR)
JOHN DAY 409 (FAIR)
LA GRANDE 419 (FAIR)
MADRAS 297 (POOR)
MEACHAM 328 (FAIR)
PENDLETON 426 (FAIR)
REDMOND 347 (FAIR)
SENECA 595 (FAIR)
THE DALLES 504 (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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