East Asia and Western Pacific METEOROLOGY AND CLIMATE

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0500 LST the next morning, the temperature in the entire north, west and south coast area
has dropped to 2-3K cooler than it started 24 hours ago.
Sea breeze started at 1100 LST and lasted until 2000 LST. Fig. 8 shows the
airflow pattern associated with the sea breeze at 1400 LST. A strong sea breeze occurred
over the entire west coast and the central part of the east coast of Taiwan. The sea-land
circulation on the north and south coastal areas is greatly skewed by the terrain and the
mean wind. Moderate precipitation (Fig. 9) occurred at this time over the western slope of
the mountain in the south and over the eastern slope of the mountain in the north-central
areas. During the next 6 hours, the sea breeze pattern was modified by the Coriolis force
and both the intensity and the area coverage of precipitation have increased. Fig. 10
shows the sea breeze pattern at 2000 LST, 2 hours after sunset. A distinct cyclonic
circulation pattern was generated over southeast Taiwan where the heating was a
maximum. This airflow pattern created an area of low level convergence and precipitation
extending from the west side of the mountain in southern Taiwan, across the central
mountain range, and to the northeast coast of Taiwan (Fig. 11) This precipitation pattern
matches the satellite cloud distribution at the same time (Fig. 12).
Land breeze first started at 2300 LST over the southwestern Taiwan near
Kaohsiung and gradually spread over other parts of the coastal areas during the next 6
hours. The wind speed of the land breeze is about half as large as the sea breeze. As the
land breeze started, the precipitation intensity weakened gradually.
i r t v i i i r 1
H
.00
.827 ''
Fig. 9 The 3-hour accumulated
precipitation ending at 1400 LST, June
20. The contour is 05 cm.
Fig. 10 Same as Fig. 8 except for the
period between 2000 LST and 0500 LST,
June 20. The maximum wind vector is
6.3 mis.