200
AUUS46 KPDT 131225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI MAR 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 SW 9-17 MPH. W 11-19 MPH.
TRANSPORT WINDS SW 12-24 MPH. W 11-19 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY GOOD. FAIR.
OUTLOOK FOR SAT MAR 14 GOOD.
OUTLOOK FOR SUN MAR 15 POOR.
VENTILATION INDEX (CATEGORY) 136 (POOR). 263 (POOR).
OUTLOOK FOR SAT MAR 14 1047 (GOOD).
OUTLOOK FOR SUN MAR 15 111 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS E 4-8 MPH. NW 6-11 MPH.
TRANSPORT WINDS NE 5-10 MPH. NW 6-11 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT MAR 14 GOOD.
OUTLOOK FOR SUN MAR 15 POOR.
VENTILATION INDEX (CATEGORY) 44 (POOR). 90 (POOR).
OUTLOOK FOR SAT MAR 14 1012 (GOOD).
OUTLOOK FOR SUN MAR 15 116 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 9-12 MPH. SW 10-14 MPH.
TRANSPORT WINDS SW 11-18 MPH. W 16-26 MPH.
MIXING HEIGHT 4000 FT MSL. 7000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT MAR 14 GOOD.
OUTLOOK FOR SUN MAR 15 FAIR.
VENTILATION INDEX (CATEGORY) 209 (POOR). 717 (GOOD).
OUTLOOK FOR SAT MAR 14 1042 (GOOD).
OUTLOOK FOR SUN MAR 15 354 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SW 11-19 MPH. SW 14-20 MPH.
TRANSPORT WINDS SW 18-25 MPH. W 14-23 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY GOOD. GOOD.
OUTLOOK FOR SAT MAR 14 GOOD.
OUTLOOK FOR SUN MAR 15 POOR.
VENTILATION INDEX (CATEGORY) 209 (POOR). 444 (FAIR).
OUTLOOK FOR SAT MAR 14 1036 (GOOD).
OUTLOOK FOR SUN MAR 15 136 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 372 (FAIR)
ELLENSBURG 263 (POOR)
GOLDENDALE 648 (GOOD)
TRI-CITIES 99 (POOR)
WALLA WALLA 210 (POOR)
YAKIMA 74 (POOR)
BEND 1003 (GOOD)
PRINEVILLE 915 (GOOD)
ENTERPRISE 1050 (GOOD)
HERMISTON 237 (POOR)
JOHN DAY 1006 (GOOD)
LA GRANDE 993 (GOOD)
MADRAS 1050 (GOOD)
MEACHAM 676 (GOOD)
PENDLETON 432 (FAIR)
REDMOND 988 (GOOD)
SENECA 900 (GOOD)
THE DALLES 720 (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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