10/12/20 01:36:42 c5hYPi5e
MEGIについて新たな情報あり
URLﾘﾝｸ(australiasevereweather.com)
Note: The highest MSW assigned by JTWC for STY Megi were 155 kts, but the
17/1800 UTC warning indicates that the storm likely reached a peak
intensity of 160-165 kts between 1200 and 1800 UTC. Following is some
information on the peak winds measured by a SFMR instrument onboard a
reconnaissance aircraft supplied by Dr. Karl Hoarau:
"The more reliable was 169 knots at 1302Z and then 165 knots at 1318Z.
The SFMR recorded 171 knots at 1113Z, 173 knots at 1203Z, 170 knots at
1303Z, 172 knots at 1317Z. But the quality code of 05 meant that the
temperature, the dew point temperature and the SFMR were questionable.
The 169 knots at 1302Z and then 165 knots at 1318Z had a good quality
data. Moreover, the 700 hPa flight wind was at 190 knots. Using 90%
of the flight wind, this gave a surface wind of 170 knots."
A dropsonde released in the eyewall reported 174 kts at the surface, but
the duration of this wind is unknown.
These observations from the SFMR are of inestimable value, recording such
high winds at the surface in a tropical cyclone. Hopefully, this will
help to dispel the notion that no typhoon since STY Tip of 1979 has had
winds exceeding 160 kts (several have had better satellite signatures).