252
AUUS46 KPDT 171225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT TUE MAR 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 SW 10-18 MPH. SW 10-18 MPH.
TRANSPORT WINDS SW 10-18 MPH. SW 11-24 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR WED MAR 18 GOOD.
OUTLOOK FOR THU MAR 19 FAIR.
VENTILATION INDEX (CATEGORY) 61 (POOR). 181 (POOR).
OUTLOOK FOR WED MAR 18 425 (FAIR).
OUTLOOK FOR THU MAR 19 205 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS SW 8-16 MPH. W 9-16 MPH.
TRANSPORT WINDS SW 8-19 MPH. W 15-26 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY FAIR. GOOD.
OUTLOOK FOR WED MAR 18 GOOD.
OUTLOOK FOR THU MAR 19 GOOD.
VENTILATION INDEX (CATEGORY) 74 (POOR). 416 (FAIR).
OUTLOOK FOR WED MAR 18 473 (FAIR).
OUTLOOK FOR THU MAR 19 608 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 9-13 MPH. S 8-11 MPH.
TRANSPORT WINDS S 10-13 MPH. SW 9-13 MPH.
MIXING HEIGHT 4000 FT MSL. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR WED MAR 18 GOOD.
OUTLOOK FOR THU MAR 19 GOOD.
VENTILATION INDEX (CATEGORY) 115 (POOR). 260 (POOR).
OUTLOOK FOR WED MAR 18 704 (GOOD).
OUTLOOK FOR THU MAR 19 817 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 10-22 MPH. SW 8-19 MPH.
TRANSPORT WINDS SW 11-22 MPH. SW 10-22 MPH.
MIXING HEIGHT NEAR SURFACE. 3000 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR WED MAR 18 GOOD.
OUTLOOK FOR THU MAR 19 FAIR.
VENTILATION INDEX (CATEGORY) 90 (POOR). 202 (POOR).
OUTLOOK FOR WED MAR 18 553 (FAIR).
OUTLOOK FOR THU MAR 19 433 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 298 (POOR)
ELLENSBURG 161 (POOR)
GOLDENDALE 480 (FAIR)
TRI-CITIES 365 (FAIR)
WALLA WALLA 119 (POOR)
YAKIMA 134 (POOR)
BEND 738 (GOOD)
PRINEVILLE 579 (FAIR)
ENTERPRISE 381 (FAIR)
HERMISTON 145 (POOR)
JOHN DAY 657 (GOOD)
LA GRANDE 276 (POOR)
MADRAS 758 (GOOD)
MEACHAM 255 (POOR)
PENDLETON 137 (POOR)
REDMOND 517 (FAIR)
SENECA 859 (GOOD)
THE DALLES 303 (FAIR)
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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