10:15 AM - 10:30 AM
[MIS29-06] Surface Temperature an Pressure Distributions of Wind Gust captured by High Dense Ground Observation Network 'POTEKA'
Keywords:compact weather sensor, high ground observation network, gust front, downburst, wind direction and wind speed, summer 2014
The wind gust occurred by cold front in Isesaki city around 12:30JST. The wind gust was estimated to gust front by Japan Meteorological Agency. Surface temperature dropped from 11:50JST, -0.25℃ per one minute on average and it drop captured in POTEKA network. The Maximum instantaneous wind speed has a peak after about 20 minutes from the temperature drop, was observed gust of about 19meter per second.
Downburst, accompanied with well-developed cumulonimbus, occurred and passed from Takasaki city to Maebashi city around 18:10 on 22 August 2014. A significant drop in temperature is noticed around 17:45, (-0.47 ℃ per one minute on average). The distributions and occurrence time of cold air captured by POTEKA network well coincide with field survey results of the Japan Meteorological Agency. In addition, the first temperature drop was confirmed about 25 minutes before damage occurrence time of the downburst.
In these cases, tendency of temperature and wind is in good agreement with the observed value of Maebashi local weather station, in order to capture wind gusts.