701
AUUS46 KPDT 311114
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
414 AM PDT MON MAR 31 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 6-11 MPH. W 15-20 MPH.
TRANSPORT WINDS S 7-12 MPH. W 17-22 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE APR 1 GOOD.
OUTLOOK FOR WED APR 2 GOOD.
VENTILATION INDEX (CATEGORY) 63 (POOR). 879 (GOOD).
OUTLOOK FOR TUE APR 1 561 (FAIR).
OUTLOOK FOR WED APR 2 837 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS S 4-8 MPH. SW 14-20 MPH.
TRANSPORT WINDS S 5-10 MPH. W 17-23 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE APR 1 GOOD.
OUTLOOK FOR WED APR 2 FAIR.
VENTILATION INDEX (CATEGORY) 44 (POOR). 782 (GOOD).
OUTLOOK FOR TUE APR 1 459 (FAIR).
OUTLOOK FOR WED APR 2 499 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 5-10 MPH. W 8-13 MPH.
TRANSPORT WINDS SW 7-12 MPH. W 12-17 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE APR 1 GOOD.
OUTLOOK FOR WED APR 2 FAIR.
VENTILATION INDEX (CATEGORY) 101 (POOR). 307 (FAIR).
OUTLOOK FOR TUE APR 1 390 (FAIR).
OUTLOOK FOR WED APR 2 550 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 7-12 MPH. SW 12-18 MPH.
TRANSPORT WINDS SW 7-12 MPH. W 15-20 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE APR 1 FAIR.
OUTLOOK FOR WED APR 2 GOOD.
VENTILATION INDEX (CATEGORY) 84 (POOR). 673 (GOOD).
OUTLOOK FOR TUE APR 1 582 (FAIR).
OUTLOOK FOR WED APR 2 787 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 417 (FAIR)
ELLENSBURG 487 (FAIR)
GOLDENDALE 641 (GOOD)
TRI-CITIES 893 (GOOD)
WALLA WALLA 658 (GOOD)
YAKIMA 572 (FAIR)
BEND 1039 (GOOD)
PRINEVILLE 1044 (GOOD)
ENTERPRISE 327 (FAIR)
HERMISTON 959 (GOOD)
JOHN DAY 1046 (GOOD)
LA GRANDE 377 (FAIR)
MADRAS 1050 (GOOD)
MEACHAM 427 (FAIR)
PENDLETON 823 (GOOD)
REDMOND 973 (GOOD)
SENECA 1046 (GOOD)
THE DALLES 367 (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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