574
AUUS46 KPDT 281102
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
402 AM PDT MON APR 28 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 10-18 MPH. SW 12-20 MPH.
TRANSPORT WINDS SW 12-18 MPH. SW 12-20 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR TUE APR 29 GOOD.
OUTLOOK FOR WED APR 30 POOR.
VENTILATION INDEX (CATEGORY) 140 (POOR). 510 (FAIR).
OUTLOOK FOR TUE APR 29 641 (GOOD).
OUTLOOK FOR WED APR 30 201 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 5-10 MPH. W 6-12 MPH.
TRANSPORT WINDS NW 5-10 MPH. W 6-12 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE APR 29 GOOD.
OUTLOOK FOR WED APR 30 POOR.
VENTILATION INDEX (CATEGORY) 56 (POOR). 307 (FAIR).
OUTLOOK FOR TUE APR 29 690 (GOOD).
OUTLOOK FOR WED APR 30 134 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 4-8 MPH. NW 10-18 MPH.
TRANSPORT WINDS NW 5-10 MPH. NW 8-16 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE APR 29 FAIR.
OUTLOOK FOR WED APR 30 GOOD.
VENTILATION INDEX (CATEGORY) 83 (POOR). 395 (FAIR).
OUTLOOK FOR TUE APR 29 264 (POOR).
OUTLOOK FOR WED APR 30 373 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 10-18 MPH. W 10-18 MPH.
TRANSPORT WINDS SW 12-20 MPH. W 8-16 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR TUE APR 29 GOOD.
OUTLOOK FOR WED APR 30 POOR.
VENTILATION INDEX (CATEGORY) 155 (POOR). 422 (FAIR).
OUTLOOK FOR TUE APR 29 404 (FAIR).
OUTLOOK FOR WED APR 30 211 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 403 (FAIR)
ELLENSBURG 514 (FAIR)
GOLDENDALE 383 (FAIR)
TRI-CITIES 476 (FAIR)
WALLA WALLA 433 (FAIR)
YAKIMA 369 (FAIR)
BEND 297 (POOR)
PRINEVILLE 258 (POOR)
ENTERPRISE 410 (FAIR)
HERMISTON 537 (FAIR)
JOHN DAY 281 (POOR)
LA GRANDE 425 (FAIR)
MADRAS 282 (POOR)
MEACHAM 308 (FAIR)
PENDLETON 484 (FAIR)
REDMOND 289 (POOR)
SENECA 357 (FAIR)
THE DALLES 598 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page