538
AUUS46 KPDT 051225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT SEP 5 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. N 3-6 MPH.
TRANSPORT WINDS S 4-8 MPH. N 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 6 FAIR.
OUTLOOK FOR MON SEP 7 GOOD.
VENTILATION INDEX (CATEGORY) 35 (POOR). 166 (POOR).
OUTLOOK FOR SUN SEP 6 227 (POOR).
OUTLOOK FOR MON SEP 7 685 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-5 MPH. E 3-6 MPH.
TRANSPORT WINDS NW 3-6 MPH. SE 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 6 POOR.
OUTLOOK FOR MON SEP 7 FAIR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 220 (POOR).
OUTLOOK FOR SUN SEP 6 215 (POOR).
OUTLOOK FOR MON SEP 7 505 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 0-1 MPH. W 2-5 MPH.
TRANSPORT WINDS N 2-4 MPH. SW 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN SEP 6 FAIR.
OUTLOOK FOR MON SEP 7 GOOD.
VENTILATION INDEX (CATEGORY) 26 (POOR). 284 (POOR).
OUTLOOK FOR SUN SEP 6 297 (POOR).
OUTLOOK FOR MON SEP 7 489 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-6 MPH. N 2-5 MPH.
TRANSPORT WINDS S 4-7 MPH. NE 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SUN SEP 6 FAIR.
OUTLOOK FOR MON SEP 7 FAIR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 149 (POOR).
OUTLOOK FOR SUN SEP 6 261 (POOR).
OUTLOOK FOR MON SEP 7 626 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 366 (FAIR)
ELLENSBURG 335 (FAIR)
GOLDENDALE 214 (POOR)
TRI-CITIES 187 (POOR)
WALLA WALLA 131 (POOR)
YAKIMA 272 (POOR)
BEND 333 (FAIR)
PRINEVILLE 312 (FAIR)
ENTERPRISE 416 (FAIR)
HERMISTON 145 (POOR)
JOHN DAY 445 (FAIR)
LA GRANDE 195 (POOR)
MADRAS 194 (POOR)
MEACHAM 132 (POOR)
PENDLETON 143 (POOR)
REDMOND 293 (POOR)
SENECA 745 (GOOD)
THE DALLES 161 (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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