100
AUUS46 KPDT 171225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT OCT 17 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 6-16 MPH. W 9-17 MPH.
TRANSPORT WINDS SW 10-18 MPH. W 11-18 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SUN OCT 18 FAIR.
OUTLOOK FOR MON OCT 19 POOR.
VENTILATION INDEX (CATEGORY) 89 (POOR). 436 (FAIR).
OUTLOOK FOR SUN OCT 18 158 (POOR).
OUTLOOK FOR MON OCT 19 77 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-6 MPH. NW 5-10 MPH.
TRANSPORT WINDS W 3-10 MPH. W 10-13 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN OCT 18 POOR.
OUTLOOK FOR MON OCT 19 POOR.
VENTILATION INDEX (CATEGORY) 30 (POOR). 444 (FAIR).
OUTLOOK FOR SUN OCT 18 93 (POOR).
OUTLOOK FOR MON OCT 19 82 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 13-23 MPH. NW 6-8 MPH.
TRANSPORT WINDS S 16-26 MPH. W 11-15 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SUN OCT 18 FAIR.
OUTLOOK FOR MON OCT 19 FAIR.
VENTILATION INDEX (CATEGORY) 90 (POOR). 325 (FAIR).
OUTLOOK FOR SUN OCT 18 66 (POOR).
OUTLOOK FOR MON OCT 19 154 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 6-15 MPH. W 10-14 MPH.
TRANSPORT WINDS SW 10-19 MPH. W 14-17 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SUN OCT 18 POOR.
OUTLOOK FOR MON OCT 19 POOR.
VENTILATION INDEX (CATEGORY) 110 (POOR). 505 (FAIR).
OUTLOOK FOR SUN OCT 18 151 (POOR).
OUTLOOK FOR MON OCT 19 80 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 641 (GOOD)
ELLENSBURG 811 (GOOD)
GOLDENDALE 543 (FAIR)
TRI-CITIES 229 (POOR)
WALLA WALLA 509 (FAIR)
YAKIMA 549 (FAIR)
BEND 204 (POOR)
PRINEVILLE 234 (POOR)
ENTERPRISE 312 (FAIR)
HERMISTON 421 (FAIR)
JOHN DAY 308 (FAIR)
LA GRANDE 375 (FAIR)
MADRAS 245 (POOR)
MEACHAM 408 (FAIR)
PENDLETON 560 (FAIR)
REDMOND 272 (POOR)
SENECA 338 (FAIR)
THE DALLES 624 (GOOD)
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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