Hurricane and Tropical Cyclones

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Tropical Weather Discussion

000 

abpw10 pgtw 230600
msgid/genadmin/joint typhoon wrncen Pearl Harbor hi//
subj/significant tropical weather advisory for the western and
/South Pacific oceans/230600z-240600zsep2014//
ref/a/msg/joint typhoon wrncen Pearl Harbor hi/230152zsep2014//
ref/b/msg/joint typhoon wrncen Pearl Harbor hi/221851zsep2014//
narr/ref a is a tropical cyclone warning. Ref b is a tropical
/cyclone formation alert.//
Rmks/
1. Western North Pacific area (180 to Malay Peninsula):
   a. Tropical cyclone summary:
      (1) at 230000z, tropical storm 16w (Fung-Wong) was located
near 30.4n 121.7e, approximately 439 nm west-southwestward of sasebo,
Japan, and had tracked northward at 09 knots over the past six hours.
Maximum sustained surface winds were estimated at 35 knots gusting to
45 knots. See ref a (wtpn32 pgtw 230300) for further details.
      (2) no other tropical cyclones.
   B. Tropical disturbance summary:
      (1) the area of convection previously located near 12.4n 148.1e
is now located near 15.2n 147.5e, approximately 100 nm east of 
Saipan. Animated multispectral satellite imagery (msi) depicts a 
broad, partially-exposed low-level circulation center (LLCC) with 
fragmented convective banding. Msi also shows an area of deep 
convection displaced well east of the LLCC associated with surface 
troughing and strong upper-level diffluence south of a TUTT cell 
positioned near 20n 150e. Recent ascat imagery indicates a broad 
circulation with 20 to 25 knot winds displaced over the eastern semi-
Circle. Surface observations from Guam and Saipan show sustained 
westerly to north-northwesterly winds of about 10 knots with slp 
near 1004 mb. Upper-level analysis reveals a marginally-favorable 
environment with light to moderate vertical wind shear (10 to 20 
knots) and fair diffluence associated with the small TUTT cell to 
the northeast. Maximum sustained surface winds are estimated at 18 
to 23 knots. Minimum sea level pressure is estimated to be near 1004 
mb. The potential for the development of a significant tropical 
cyclone within the next 24 hours remains high. See ref b (wtpn21 
pgtw 221900) for further details.
      (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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Dr. Jeff Masters' Blog
By Dr. Jeff Masters, 10:01 AM EDT on September 23, 2014
Director of Meteorology, Weather Underground
The tropics are unusually quiet for the first full day of fall, with only one tropical cyclone active--Tropical Depression Fung-Wong in the Western Pacific, which grazed the coast of China near Shanghai Tuesday morning, [...]

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