093
AUUS46 KPDT 201225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN SEP 20 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SE 0-6 MPH. N 3-7 MPH.
TRANSPORT WINDS SE 3-7 MPH. N 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON SEP 21 FAIR.
OUTLOOK FOR TUE SEP 22 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 118 (POOR).
OUTLOOK FOR MON SEP 21 154 (POOR).
OUTLOOK FOR TUE SEP 22 312 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. E 2-6 MPH.
TRANSPORT WINDS NW 2-5 MPH. SE 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON SEP 21 FAIR.
OUTLOOK FOR TUE SEP 22 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 133 (POOR).
OUTLOOK FOR MON SEP 21 155 (POOR).
OUTLOOK FOR TUE SEP 22 169 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 0-2 MPH. SE 1-4 MPH.
TRANSPORT WINDS SE 2-4 MPH. S 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON SEP 21 GOOD.
OUTLOOK FOR TUE SEP 22 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 184 (POOR).
OUTLOOK FOR MON SEP 21 397 (FAIR).
OUTLOOK FOR TUE SEP 22 225 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-8 MPH. N 4-8 MPH.
TRANSPORT WINDS SE 6-11 MPH. N 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON SEP 21 FAIR.
OUTLOOK FOR TUE SEP 22 FAIR.
VENTILATION INDEX (CATEGORY) 36 (POOR). 99 (POOR).
OUTLOOK FOR MON SEP 21 201 (POOR).
OUTLOOK FOR TUE SEP 22 295 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 219 (POOR)
ELLENSBURG 169 (POOR)
GOLDENDALE 183 (POOR)
TRI-CITIES 84 (POOR)
WALLA WALLA 104 (POOR)
YAKIMA 152 (POOR)
BEND 396 (FAIR)
PRINEVILLE 433 (FAIR)
ENTERPRISE 211 (POOR)
HERMISTON 97 (POOR)
JOHN DAY 295 (POOR)
LA GRANDE 227 (POOR)
MADRAS 199 (POOR)
MEACHAM 177 (POOR)
PENDLETON 171 (POOR)
REDMOND 394 (FAIR)
SENECA 398 (FAIR)
THE DALLES 160 (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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