041
AUUS46 KPDT 171325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST MON NOV 17 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SE 2-6 MPH. NW 5-7 MPH.
TRANSPORT WINDS S 3-6 MPH. SW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE NOV 18 FAIR.
OUTLOOK FOR WED NOV 19 POOR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 52 (POOR).
OUTLOOK FOR TUE NOV 18 279 (POOR).
OUTLOOK FOR WED NOV 19 69 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-3 MPH. SE 2-5 MPH.
TRANSPORT WINDS NE 2-4 MPH. SE 2-5 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE NOV 18 POOR.
OUTLOOK FOR WED NOV 19 POOR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 39 (POOR).
OUTLOOK FOR TUE NOV 18 113 (POOR).
OUTLOOK FOR WED NOV 19 71 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 2-4 MPH. S 3-4 MPH.
TRANSPORT WINDS S 6-6 MPH. S 6-8 MPH.
MIXING HEIGHT 4000 FT MSL. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE NOV 18 FAIR.
OUTLOOK FOR WED NOV 19 FAIR.
VENTILATION INDEX (CATEGORY) 65 (POOR). 175 (POOR).
OUTLOOK FOR TUE NOV 18 135 (POOR).
OUTLOOK FOR WED NOV 19 149 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 3-7 MPH. NW 3-6 MPH.
TRANSPORT WINDS S 6-8 MPH. SW 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE NOV 18 FAIR.
OUTLOOK FOR WED NOV 19 POOR.
VENTILATION INDEX (CATEGORY) 47 (POOR). 92 (POOR).
OUTLOOK FOR TUE NOV 18 284 (POOR).
OUTLOOK FOR WED NOV 19 97 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 143 (POOR)
ELLENSBURG 25 (POOR)
GOLDENDALE 147 (POOR)
TRI-CITIES 45 (POOR)
WALLA WALLA 54 (POOR)
YAKIMA 37 (POOR)
BEND 343 (FAIR)
PRINEVILLE 302 (FAIR)
ENTERPRISE 63 (POOR)
HERMISTON 40 (POOR)
JOHN DAY 285 (POOR)
LA GRANDE 154 (POOR)
MADRAS 89 (POOR)
MEACHAM 139 (POOR)
PENDLETON 47 (POOR)
REDMOND 260 (POOR)
SENECA 253 (POOR)
THE DALLES 243 (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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