Abstract
A combination of subsidence, east winds and advection of warm air produced a summer heat wave that raised maximum temperatures 35F in four days. This meteorological event was analyzed at the mesoscale, from data in reports from 15 lower elevation stations and from 90 fire-weather stations in mountainous western Oregon. The temperature analyses show the influences of major physiographic features and a stratified marine airmass. The complex temperature patterns, illustrated in cross sections and terrain surface potential temperature analyses, are related to both pressure and wind-flow patterns.
