937
AUUS46 KPDT 041225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT JUL 4 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 6-15 MPH. W 10-17 MPH.
TRANSPORT WINDS SW 9-16 MPH. W 14-18 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR SUN JUL 5 FAIR.
OUTLOOK FOR MON JUL 6 FAIR.
VENTILATION INDEX (CATEGORY) 172 (POOR). 718 (GOOD).
OUTLOOK FOR SUN JUL 5 333 (FAIR).
OUTLOOK FOR MON JUL 6 219 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-5 MPH. W 4-8 MPH.
TRANSPORT WINDS NW 4-8 MPH. W 10-14 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN JUL 5 POOR.
OUTLOOK FOR MON JUL 6 FAIR.
VENTILATION INDEX (CATEGORY) 55 (POOR). 482 (FAIR).
OUTLOOK FOR SUN JUL 5 232 (POOR).
OUTLOOK FOR MON JUL 6 321 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NE 0-2 MPH. NW 7-10 MPH.
TRANSPORT WINDS W 4-8 MPH. W 11-14 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN JUL 5 GOOD.
OUTLOOK FOR MON JUL 6 GOOD.
VENTILATION INDEX (CATEGORY) 53 (POOR). 523 (FAIR).
OUTLOOK FOR SUN JUL 5 466 (FAIR).
OUTLOOK FOR MON JUL 6 289 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 4-16 MPH. W 9-15 MPH.
TRANSPORT WINDS SW 9-16 MPH. W 13-18 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SUN JUL 5 FAIR.
OUTLOOK FOR MON JUL 6 FAIR.
VENTILATION INDEX (CATEGORY) 164 (POOR). 621 (GOOD).
OUTLOOK FOR SUN JUL 5 356 (FAIR).
OUTLOOK FOR MON JUL 6 192 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 618 (GOOD)
ELLENSBURG 876 (GOOD)
GOLDENDALE 665 (GOOD)
TRI-CITIES 626 (GOOD)
WALLA WALLA 647 (GOOD)
YAKIMA 542 (FAIR)
BEND 445 (FAIR)
PRINEVILLE 459 (FAIR)
ENTERPRISE 579 (FAIR)
HERMISTON 799 (GOOD)
JOHN DAY 803 (GOOD)
LA GRANDE 568 (FAIR)
MADRAS 392 (FAIR)
MEACHAM 466 (FAIR)
PENDLETON 690 (GOOD)
REDMOND 452 (FAIR)
SENECA 1050 (GOOD)
THE DALLES 621 (GOOD)
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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