344
AUUS46 KPDT 121225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN APR 12 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 2-5 MPH. SW 7-12 MPH.
TRANSPORT WINDS W 2-5 MPH. SW 9-13 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON APR 13 GOOD.
OUTLOOK FOR TUE APR 14 GOOD.
VENTILATION INDEX (CATEGORY) 28 (POOR). 164 (POOR).
OUTLOOK FOR MON APR 13 898 (GOOD).
OUTLOOK FOR TUE APR 14 1050 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. SW 6-8 MPH.
TRANSPORT WINDS NW 4-8 MPH. SW 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON APR 13 GOOD.
OUTLOOK FOR TUE APR 14 GOOD.
VENTILATION INDEX (CATEGORY) 44 (POOR). 113 (POOR).
OUTLOOK FOR MON APR 13 697 (GOOD).
OUTLOOK FOR TUE APR 14 1021 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NE 1-3 MPH. SW 5-6 MPH.
TRANSPORT WINDS SE 2-5 MPH. SW 5-9 MPH.
MIXING HEIGHT 4000 FT MSL. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON APR 13 FAIR.
OUTLOOK FOR TUE APR 14 GOOD.
VENTILATION INDEX (CATEGORY) 50 (POOR). 127 (POOR).
OUTLOOK FOR MON APR 13 398 (FAIR).
OUTLOOK FOR TUE APR 14 873 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 2-5 MPH. W 6-11 MPH.
TRANSPORT WINDS SE 3-6 MPH. W 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON APR 13 GOOD.
OUTLOOK FOR TUE APR 14 GOOD.
VENTILATION INDEX (CATEGORY) 31 (POOR). 162 (POOR).
OUTLOOK FOR MON APR 13 796 (GOOD).
OUTLOOK FOR TUE APR 14 1041 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 335 (FAIR)
ELLENSBURG 292 (POOR)
GOLDENDALE 262 (POOR)
TRI-CITIES 134 (POOR)
WALLA WALLA 130 (POOR)
YAKIMA 45 (POOR)
BEND 467 (FAIR)
PRINEVILLE 292 (POOR)
ENTERPRISE 104 (POOR)
HERMISTON 112 (POOR)
JOHN DAY 532 (FAIR)
LA GRANDE 115 (POOR)
MADRAS 318 (FAIR)
MEACHAM 61 (POOR)
PENDLETON 156 (POOR)
REDMOND 338 (FAIR)
SENECA 568 (FAIR)
THE DALLES 315 (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