804
AUUS46 KPDT 181225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT JUL 18 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 11-16 MPH.
TRANSPORT WINDS SW 8-14 MPH. W 11-15 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN JUL 19 FAIR.
OUTLOOK FOR MON JUL 20 POOR.
VENTILATION INDEX (CATEGORY) 131 (POOR). 507 (FAIR).
OUTLOOK FOR SUN JUL 19 345 (FAIR).
OUTLOOK FOR MON JUL 20 175 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 2-6 MPH. NW 4-8 MPH.
TRANSPORT WINDS NW 4-8 MPH. W 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN JUL 19 FAIR.
OUTLOOK FOR MON JUL 20 POOR.
VENTILATION INDEX (CATEGORY) 56 (POOR). 350 (FAIR).
OUTLOOK FOR SUN JUL 19 259 (POOR).
OUTLOOK FOR MON JUL 20 174 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. NW 8-11 MPH.
TRANSPORT WINDS NW 4-8 MPH. NW 10-12 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN JUL 19 GOOD.
OUTLOOK FOR MON JUL 20 FAIR.
VENTILATION INDEX (CATEGORY) 47 (POOR). 350 (FAIR).
OUTLOOK FOR SUN JUL 19 552 (FAIR).
OUTLOOK FOR MON JUL 20 180 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-13 MPH. W 9-13 MPH.
TRANSPORT WINDS SW 7-16 MPH. W 10-14 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN JUL 19 FAIR.
OUTLOOK FOR MON JUL 20 FAIR.
VENTILATION INDEX (CATEGORY) 113 (POOR). 392 (FAIR).
OUTLOOK FOR SUN JUL 19 370 (FAIR).
OUTLOOK FOR MON JUL 20 194 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 571 (FAIR)
ELLENSBURG 947 (GOOD)
GOLDENDALE 613 (GOOD)
TRI-CITIES 493 (FAIR)
WALLA WALLA 438 (FAIR)
YAKIMA 340 (FAIR)
BEND 519 (FAIR)
PRINEVILLE 505 (FAIR)
ENTERPRISE 392 (FAIR)
HERMISTON 513 (FAIR)
JOHN DAY 632 (GOOD)
LA GRANDE 392 (FAIR)
MADRAS 377 (FAIR)
MEACHAM 253 (POOR)
PENDLETON 436 (FAIR)
REDMOND 488 (FAIR)
SENECA 1046 (GOOD)
THE DALLES 596 (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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