036
AUUS46 KPDT 271056
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
356 AM PDT SUN APR 27 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 8-16 MPH. W 12-18 MPH.
TRANSPORT WINDS SW 10-18 MPH. W 12-18 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR MON APR 28 FAIR.
OUTLOOK FOR TUE APR 29 GOOD.
VENTILATION INDEX (CATEGORY) 116 (POOR). 515 (FAIR).
OUTLOOK FOR MON APR 28 447 (FAIR).
OUTLOOK FOR TUE APR 29 857 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 7-13 MPH. NW 12-18 MPH.
TRANSPORT WINDS NW 7-13 MPH. NW 12-18 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON APR 28 FAIR.
OUTLOOK FOR TUE APR 29 GOOD.
VENTILATION INDEX (CATEGORY) 80 (POOR). 662 (GOOD).
OUTLOOK FOR MON APR 28 243 (POOR).
OUTLOOK FOR TUE APR 29 802 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 5-10 MPH. NW 15-25 MPH.
TRANSPORT WINDS NW 5-10 MPH. NW 15-25 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON APR 28 GOOD.
OUTLOOK FOR TUE APR 29 FAIR.
VENTILATION INDEX (CATEGORY) 71 (POOR). 560 (FAIR).
OUTLOOK FOR MON APR 28 380 (FAIR).
OUTLOOK FOR TUE APR 29 276 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS W 7-14 MPH. W 12-18 MPH.
TRANSPORT WINDS SW 8-16 MPH. W 12-18 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR MON APR 28 FAIR.
OUTLOOK FOR TUE APR 29 GOOD.
VENTILATION INDEX (CATEGORY) 112 (POOR). 439 (FAIR).
OUTLOOK FOR MON APR 28 372 (FAIR).
OUTLOOK FOR TUE APR 29 727 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 453 (FAIR)
ELLENSBURG 557 (FAIR)
GOLDENDALE 442 (FAIR)
TRI-CITIES 515 (FAIR)
WALLA WALLA 403 (FAIR)
YAKIMA 814 (GOOD)
BEND 544 (FAIR)
PRINEVILLE 585 (FAIR)
ENTERPRISE 457 (FAIR)
HERMISTON 524 (FAIR)
JOHN DAY 775 (GOOD)
LA GRANDE 578 (FAIR)
MADRAS 550 (FAIR)
MEACHAM 421 (FAIR)
PENDLETON 513 (FAIR)
REDMOND 574 (FAIR)
SENECA 832 (GOOD)
THE DALLES 619 (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