682
AUUS46 KPDT 161325
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST SUN NOV 16 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. SW 3-6 MPH.
TRANSPORT WINDS E 3-7 MPH. SW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 2000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON NOV 17 POOR.
OUTLOOK FOR TUE NOV 18 FAIR.
VENTILATION INDEX (CATEGORY) 26 (POOR). 41 (POOR).
OUTLOOK FOR MON NOV 17 77 (POOR).
OUTLOOK FOR TUE NOV 18 336 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. SE 2-5 MPH.
TRANSPORT WINDS NW 3-6 MPH. S 2-4 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON NOV 17 POOR.
OUTLOOK FOR TUE NOV 18 FAIR.
VENTILATION INDEX (CATEGORY) 28 (POOR). 32 (POOR).
OUTLOOK FOR MON NOV 17 52 (POOR).
OUTLOOK FOR TUE NOV 18 209 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 5-10 MPH. S 4-7 MPH.
TRANSPORT WINDS S 8-14 MPH. S 13-19 MPH.
MIXING HEIGHT 4000 FT MSL. 5000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON NOV 17 FAIR.
OUTLOOK FOR TUE NOV 18 FAIR.
VENTILATION INDEX (CATEGORY) 118 (POOR). 269 (POOR).
OUTLOOK FOR MON NOV 17 259 (POOR).
OUTLOOK FOR TUE NOV 18 201 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 4-9 MPH. SW 3-6 MPH.
TRANSPORT WINDS SE 5-13 MPH. SW 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. NEAR SURFACE.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON NOV 17 POOR.
OUTLOOK FOR TUE NOV 18 FAIR.
VENTILATION INDEX (CATEGORY) 53 (POOR). 54 (POOR).
OUTLOOK FOR MON NOV 17 115 (POOR).
OUTLOOK FOR TUE NOV 18 332 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 79 (POOR)
ELLENSBURG 42 (POOR)
GOLDENDALE 93 (POOR)
TRI-CITIES 44 (POOR)
WALLA WALLA 45 (POOR)
YAKIMA 25 (POOR)
BEND 136 (POOR)
PRINEVILLE 55 (POOR)
ENTERPRISE 123 (POOR)
HERMISTON 33 (POOR)
JOHN DAY 194 (POOR)
LA GRANDE 262 (POOR)
MADRAS 65 (POOR)
MEACHAM 80 (POOR)
PENDLETON 49 (POOR)
REDMOND 43 (POOR)
SENECA 201 (POOR)
THE DALLES 70 (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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