700
AUUS46 KPDT 131225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE OCT 13 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 2-9 MPH. W 2-5 MPH.
TRANSPORT WINDS S 5-9 MPH. W 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED OCT 14 POOR.
OUTLOOK FOR THU OCT 15 POOR.
VENTILATION INDEX (CATEGORY) 31 (POOR). 131 (POOR).
OUTLOOK FOR WED OCT 14 151 (POOR).
OUTLOOK FOR THU OCT 15 102 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-1 MPH. SE 2-5 MPH.
TRANSPORT WINDS W 2-5 MPH. S 4-5 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED OCT 14 POOR.
OUTLOOK FOR THU OCT 15 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 79 (POOR).
OUTLOOK FOR WED OCT 14 91 (POOR).
OUTLOOK FOR THU OCT 15 125 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 3-8 MPH. NW 5-11 MPH.
TRANSPORT WINDS NW 4-8 MPH. N 8-14 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED OCT 14 FAIR.
OUTLOOK FOR THU OCT 15 FAIR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 293 (POOR).
OUTLOOK FOR WED OCT 14 276 (POOR).
OUTLOOK FOR THU OCT 15 168 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 4-9 MPH. NW 2-4 MPH.
TRANSPORT WINDS S 7-10 MPH. NW 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR WED OCT 14 FAIR.
OUTLOOK FOR THU OCT 15 POOR.
VENTILATION INDEX (CATEGORY) 43 (POOR). 126 (POOR).
OUTLOOK FOR WED OCT 14 208 (POOR).
OUTLOOK FOR THU OCT 15 79 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 202 (POOR)
ELLENSBURG 116 (POOR)
GOLDENDALE 149 (POOR)
TRI-CITIES 135 (POOR)
WALLA WALLA 112 (POOR)
YAKIMA 72 (POOR)
BEND 170 (POOR)
PRINEVILLE 143 (POOR)
ENTERPRISE 204 (POOR)
HERMISTON 122 (POOR)
JOHN DAY 266 (POOR)
LA GRANDE 297 (POOR)
MADRAS 114 (POOR)
MEACHAM 178 (POOR)
PENDLETON 130 (POOR)
REDMOND 126 (POOR)
SENECA 360 (FAIR)
THE DALLES 165 (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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