Observed low level jets associated with typhoon Higos (0221) over the Kanto plain

Abstract

An analysis of the low-level jet (LLJ) observed near the center of Typhoon Higos (0221) over the Kanto plain is presented by using upper soundings and a dual analysis of Doppler radars. The LLJ in the rear of Higos was observed near the surface in a cool airflow that flowed out of the airmass on the cold side of the frontal zone, considered to conserve high angular momentum relative to Higos moving rapidly on the warm side of the front. The LLJ was also observed in front of Higos; the wind maximum was in a warm airmass elevated over a cool surface air associated with relatively weak surface winds.