373
AUUS46 KPDT 141225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN SEP 14 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 9-20 MPH. SW 14-19 MPH.
TRANSPORT WINDS SW 15-21 MPH. W 18-22 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR MON SEP 15 POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 143 (POOR). 676 (GOOD).
OUTLOOK FOR MON SEP 15 155 (POOR).
OUTLOOK FOR TUE SEP 16 128 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS S 4-11 MPH. W 10-15 MPH.
TRANSPORT WINDS SW 6-12 MPH. W 13-18 MPH.
MIXING HEIGHT NEAR SURFACE. 5000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON SEP 15 POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 77 (POOR). 510 (FAIR).
OUTLOOK FOR MON SEP 15 83 (POOR).
OUTLOOK FOR TUE SEP 16 286 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 4-8 MPH. NW 5-6 MPH.
TRANSPORT WINDS W 7-13 MPH. W 7-10 MPH.
MIXING HEIGHT 4000 FT MSL. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON SEP 15 POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 113 (POOR). 166 (POOR).
OUTLOOK FOR MON SEP 15 116 (POOR).
OUTLOOK FOR TUE SEP 16 394 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 7-17 MPH. SW 11-16 MPH.
TRANSPORT WINDS SW 13-21 MPH. W 16-19 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR MON SEP 15 POOR.
OUTLOOK FOR TUE SEP 16 FAIR.
VENTILATION INDEX (CATEGORY) 159 (POOR). 549 (FAIR).
OUTLOOK FOR MON SEP 15 136 (POOR).
OUTLOOK FOR TUE SEP 16 193 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 549 (FAIR)
ELLENSBURG 521 (FAIR)
GOLDENDALE 645 (GOOD)
TRI-CITIES 668 (GOOD)
WALLA WALLA 581 (FAIR)
YAKIMA 354 (FAIR)
BEND 651 (GOOD)
PRINEVILLE 723 (GOOD)
ENTERPRISE 171 (POOR)
HERMISTON 707 (GOOD)
JOHN DAY 482 (FAIR)
LA GRANDE 196 (POOR)
MADRAS 711 (GOOD)
MEACHAM 326 (FAIR)
PENDLETON 718 (GOOD)
REDMOND 732 (GOOD)
SENECA 591 (FAIR)
THE DALLES 809 (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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