Tropical Weather Discussion


abpw10 pgtw 240600
msgid/genadmin/joint typhoon wrncen Pearl Harbor hi//
subj/significant tropical weather advisory for the western and
/South Pacific oceans/240600z-250600zsep2017//
ref/a/msg/joint typhoon wrncen Pearl Harbor hi/240151zsep2017//
ampn/ref a is a tropical cyclone warning.//
1. Western North Pacific area (180 to Malay Peninsula):
   a. Tropical cyclone summary:
      (1) at 240000z, tropical depression 22w (twentytwo) was
located near 18.2n 113.0e, approximately 255 nm south-southwest of
Hong Kong, and had tracked westward at 14 knots over the past six
hours. Maximum sustained surface winds were estimated at 30 knots
gusting to 40 knots. See ref a (wtpn31 pgtw 240300) for further
      (2) no other tropical cyclones.
   B. Tropical disturbance summary:
      (1) the area of convection (invest 92w) previously located
near 4.7n 135.5e, is now located near 4.8n 130.8e, approximately 540
nm east-southeast of zamboanga, Philippines. Animated multispectral
satellite imagery and a 240053z AMSU metop-b 89ghz image show an
elongated and disorganized low level circulation center (LLCC) with
scattered convection throughout the northern periphery. Upper level
analysis indicates the system is located in an area of low (5-10
knots) vertical wind shear and moderate upper level divergence, with
warm (30-32 celsius) sea surface temperatures. Global models
indicate the system will remain weak and track to the west-northwest
over the next 72 hours. Maximum sustained surface winds are
estimated at 10 to 15 knots. Minimum sea level pressure is estimated
to be near 1007 mb. The potential for the development of a
significant tropical cyclone within the next 24 hours remains low.
      (2) no other suspect areas.
2. South Pacific area (west coast of South America to 135 east):
   a. Tropical cyclone summary: none.
   B. Tropical disturbance summary: none.//

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