124
AUUS46 KPDT 211225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON SEP 21 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. NW 3-7 MPH.
TRANSPORT WINDS S 3-7 MPH. W 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE SEP 22 FAIR.
OUTLOOK FOR WED SEP 23 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 136 (POOR).
OUTLOOK FOR TUE SEP 22 405 (FAIR).
OUTLOOK FOR WED SEP 23 213 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-3 MPH. SE 2-6 MPH.
TRANSPORT WINDS NW 3-6 MPH. S 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE SEP 22 FAIR.
OUTLOOK FOR WED SEP 23 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 134 (POOR).
OUTLOOK FOR TUE SEP 22 281 (POOR).
OUTLOOK FOR WED SEP 23 109 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 3-11 MPH. S 8-11 MPH.
TRANSPORT WINDS S 5-10 MPH. S 10-12 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE SEP 22 FAIR.
OUTLOOK FOR WED SEP 23 FAIR.
VENTILATION INDEX (CATEGORY) 52 (POOR). 626 (GOOD).
OUTLOOK FOR TUE SEP 22 292 (POOR).
OUTLOOK FOR WED SEP 23 129 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-10 MPH. NW 4-8 MPH.
TRANSPORT WINDS S 7-13 MPH. W 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE SEP 22 FAIR.
OUTLOOK FOR WED SEP 23 FAIR.
VENTILATION INDEX (CATEGORY) 50 (POOR). 212 (POOR).
OUTLOOK FOR TUE SEP 22 408 (FAIR).
OUTLOOK FOR WED SEP 23 214 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 192 (POOR)
ELLENSBURG 159 (POOR)
GOLDENDALE 181 (POOR)
TRI-CITIES 99 (POOR)
WALLA WALLA 191 (POOR)
YAKIMA 148 (POOR)
BEND 270 (POOR)
PRINEVILLE 240 (POOR)
ENTERPRISE 362 (FAIR)
HERMISTON 103 (POOR)
JOHN DAY 327 (FAIR)
LA GRANDE 611 (GOOD)
MADRAS 96 (POOR)
MEACHAM 262 (POOR)
PENDLETON 175 (POOR)
REDMOND 170 (POOR)
SENECA 376 (FAIR)
THE DALLES 234 (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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