032
AUUS46 KPDT 251225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN OCT 25 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 2-6 MPH. N 4-8 MPH.
TRANSPORT WINDS SE 4-9 MPH. NE 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON OCT 26 FAIR.
OUTLOOK FOR TUE OCT 27 GOOD.
VENTILATION INDEX (CATEGORY) 26 (POOR). 53 (POOR).
OUTLOOK FOR MON OCT 26 296 (POOR).
OUTLOOK FOR TUE OCT 27 650 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. E 2-5 MPH.
TRANSPORT WINDS NW 4-5 MPH. E 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON OCT 26 FAIR.
OUTLOOK FOR TUE OCT 27 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 73 (POOR).
OUTLOOK FOR MON OCT 26 168 (POOR).
OUTLOOK FOR TUE OCT 27 223 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 13-26 MPH. S 19-25 MPH.
TRANSPORT WINDS S 14-27 MPH. S 21-25 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR MON OCT 26 FAIR.
OUTLOOK FOR TUE OCT 27 FAIR.
VENTILATION INDEX (CATEGORY) 124 (POOR). 546 (FAIR).
OUTLOOK FOR MON OCT 26 156 (POOR).
OUTLOOK FOR TUE OCT 27 303 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 4-16 MPH. N 3-7 MPH.
TRANSPORT WINDS SE 9-19 MPH. S 5-14 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY FAIR. POOR.
OUTLOOK FOR MON OCT 26 FAIR.
OUTLOOK FOR TUE OCT 27 GOOD.
VENTILATION INDEX (CATEGORY) 55 (POOR). 137 (POOR).
OUTLOOK FOR MON OCT 26 291 (POOR).
OUTLOOK FOR TUE OCT 27 624 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 290 (POOR)
ELLENSBURG 155 (POOR)
GOLDENDALE 123 (POOR)
TRI-CITIES 63 (POOR)
WALLA WALLA 71 (POOR)
YAKIMA 82 (POOR)
BEND 825 (GOOD)
PRINEVILLE 561 (FAIR)
ENTERPRISE 127 (POOR)
HERMISTON 60 (POOR)
JOHN DAY 352 (FAIR)
LA GRANDE 476 (FAIR)
MADRAS 402 (FAIR)
MEACHAM 268 (POOR)
PENDLETON 25 (POOR)
REDMOND 691 (GOOD)
SENECA 320 (FAIR)
THE DALLES 91 (POOR)
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