400
AUUS46 KPDT 121225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN JUL 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 SW 7-16 MPH. NW 3-6 MPH.
TRANSPORT WINDS SW 11-19 MPH. W 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY FAIR. POOR.
OUTLOOK FOR MON JUL 13 POOR.
OUTLOOK FOR TUE JUL 14 FAIR.
VENTILATION INDEX (CATEGORY) 165 (POOR). 193 (POOR).
OUTLOOK FOR MON JUL 13 187 (POOR).
OUTLOOK FOR TUE JUL 14 307 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 5-11 MPH. SE 4-8 MPH.
TRANSPORT WINDS NW 7-13 MPH. SW 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON JUL 13 FAIR.
OUTLOOK FOR TUE JUL 14 FAIR.
VENTILATION INDEX (CATEGORY) 107 (POOR). 250 (POOR).
OUTLOOK FOR MON JUL 13 445 (FAIR).
OUTLOOK FOR TUE JUL 14 254 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 4-12 MPH. N 2-5 MPH.
TRANSPORT WINDS NW 7-13 MPH. SW 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON JUL 13 GOOD.
OUTLOOK FOR TUE JUL 14 FAIR.
VENTILATION INDEX (CATEGORY) 97 (POOR). 127 (POOR).
OUTLOOK FOR MON JUL 13 205 (POOR).
OUTLOOK FOR TUE JUL 14 316 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 3-14 MPH. NW 3-6 MPH.
TRANSPORT WINDS SW 8-18 MPH. NW 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY FAIR. POOR.
OUTLOOK FOR MON JUL 13 FAIR.
OUTLOOK FOR TUE JUL 14 FAIR.
VENTILATION INDEX (CATEGORY) 132 (POOR). 167 (POOR).
OUTLOOK FOR MON JUL 13 207 (POOR).
OUTLOOK FOR TUE JUL 14 287 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 408 (FAIR)
ELLENSBURG 497 (FAIR)
GOLDENDALE 276 (POOR)
TRI-CITIES 170 (POOR)
WALLA WALLA 176 (POOR)
YAKIMA 270 (POOR)
BEND 395 (FAIR)
PRINEVILLE 283 (POOR)
ENTERPRISE 218 (POOR)
HERMISTON 174 (POOR)
JOHN DAY 594 (FAIR)
LA GRANDE 165 (POOR)
MADRAS 173 (POOR)
MEACHAM 114 (POOR)
PENDLETON 172 (POOR)
REDMOND 167 (POOR)
SENECA 1050 (GOOD)
THE DALLES 297 (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.
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