983
AUUS46 KPDT 221225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT AUG 22 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 7-17 MPH. W 14-21 MPH.
TRANSPORT WINDS SW 7-16 MPH. W 17-23 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN AUG 23 FAIR.
OUTLOOK FOR MON AUG 24 FAIR.
VENTILATION INDEX (CATEGORY) 96 (POOR). 573 (FAIR).
OUTLOOK FOR SUN AUG 23 538 (FAIR).
OUTLOOK FOR MON AUG 24 209 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 1-7 MPH. SW 14-20 MPH.
TRANSPORT WINDS NW 4-8 MPH. SW 18-22 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN AUG 23 FAIR.
OUTLOOK FOR MON AUG 24 POOR.
VENTILATION INDEX (CATEGORY) 42 (POOR). 802 (GOOD).
OUTLOOK FOR SUN AUG 23 316 (FAIR).
OUTLOOK FOR MON AUG 24 145 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. W 6-9 MPH.
TRANSPORT WINDS N 3-6 MPH. SW 13-18 MPH.
MIXING HEIGHT NEAR SURFACE. 10500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN AUG 23 GOOD.
OUTLOOK FOR MON AUG 24 FAIR.
VENTILATION INDEX (CATEGORY) 30 (POOR). 840 (GOOD).
OUTLOOK FOR SUN AUG 23 532 (FAIR).
OUTLOOK FOR MON AUG 24 185 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-11 MPH. W 9-15 MPH.
TRANSPORT WINDS S 6-11 MPH. W 12-17 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN AUG 23 FAIR.
OUTLOOK FOR MON AUG 24 FAIR.
VENTILATION INDEX (CATEGORY) 61 (POOR). 410 (FAIR).
OUTLOOK FOR SUN AUG 23 522 (FAIR).
OUTLOOK FOR MON AUG 24 209 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 288 (POOR)
ELLENSBURG 560 (FAIR)
GOLDENDALE 671 (GOOD)
TRI-CITIES 683 (GOOD)
WALLA WALLA 470 (FAIR)
YAKIMA 741 (GOOD)
BEND 1050 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 1050 (GOOD)
HERMISTON 678 (GOOD)
JOHN DAY 1050 (GOOD)
LA GRANDE 649 (GOOD)
MADRAS 876 (GOOD)
MEACHAM 304 (FAIR)
PENDLETON 498 (FAIR)
REDMOND 1050 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 565 (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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