019
AUUS46 KPDT 231225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT MAY 23 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 4-11 MPH. W 11-18 MPH.
TRANSPORT WINDS S 5-11 MPH. W 13-19 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN MAY 24 GOOD.
OUTLOOK FOR MON MAY 25 GOOD.
VENTILATION INDEX (CATEGORY) 94 (POOR). 740 (GOOD).
OUTLOOK FOR SUN MAY 24 791 (GOOD).
OUTLOOK FOR MON MAY 25 482 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-7 MPH. NW 4-8 MPH.
TRANSPORT WINDS NW 5-9 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN MAY 24 GOOD.
OUTLOOK FOR MON MAY 25 GOOD.
VENTILATION INDEX (CATEGORY) 79 (POOR). 482 (FAIR).
OUTLOOK FOR SUN MAY 24 564 (FAIR).
OUTLOOK FOR MON MAY 25 976 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. N 5-7 MPH.
TRANSPORT WINDS S 2-4 MPH. W 9-11 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN MAY 24 GOOD.
OUTLOOK FOR MON MAY 25 GOOD.
VENTILATION INDEX (CATEGORY) 33 (POOR). 494 (FAIR).
OUTLOOK FOR SUN MAY 24 544 (FAIR).
OUTLOOK FOR MON MAY 25 1037 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-10 MPH. W 9-15 MPH.
TRANSPORT WINDS S 6-11 MPH. W 11-15 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN MAY 24 FAIR.
OUTLOOK FOR MON MAY 25 FAIR.
VENTILATION INDEX (CATEGORY) 77 (POOR). 565 (FAIR).
OUTLOOK FOR SUN MAY 24 653 (GOOD).
OUTLOOK FOR MON MAY 25 436 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 536 (FAIR)
ELLENSBURG 986 (GOOD)
GOLDENDALE 662 (GOOD)
TRI-CITIES 636 (GOOD)
WALLA WALLA 456 (FAIR)
YAKIMA 466 (FAIR)
BEND 530 (FAIR)
PRINEVILLE 584 (FAIR)
ENTERPRISE 739 (GOOD)
HERMISTON 721 (GOOD)
JOHN DAY 810 (GOOD)
LA GRANDE 557 (FAIR)
MADRAS 498 (FAIR)
MEACHAM 500 (FAIR)
PENDLETON 694 (GOOD)
REDMOND 638 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 638 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page