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12E.Kay 緩慢北上 路徑迂迴

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[LV.9]以壇為家II

2016-8-17 10:05 | 顯示全部樓層
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[LV.Master]伴壇終老

t02436|2016-8-18 10:49 | 顯示全部樓層
NHC提升兩日展望到40%
1. An area of low pressure located about 330 miles southwest of
Manzanillo, Mexico, is producing disorganized showers and
thunderstorms.  Upper-level winds are forecast to be marginally
conducive for gradual development of this system during the next
few days while it moves northwestward.  Environmental conditions
are expected to become less conducive for development by late in
the weekend.
* Formation chance through 48 hours...medium...40 percent
* Formation chance through 5 days...medium...60 percent

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[LV.Master]伴壇終老

t02436|2016-8-18 20:49 | 顯示全部樓層
NHC提升評級到High
Showers and thunderstorms gradually continue to become better
organized in association with a low pressure system located about
350 miles west-southwest of Manzanillo, Mexico.  Upper-level winds
are expected to become more conducive for a tropical depression to
form tonight or tomorrow while this system moves generally
northwestward.

1. * Formation chance through 48 hours...high...70 percent
* Formation chance through 5 days...high...70 percent

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美國海軍亦發布TCFA
ep972016.20160818115243.gif

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劉瑞益@FB|2016-8-19 10:43 | 顯示全部樓層
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[LV.Master]伴壇終老

t02436|2016-8-19 18:24 | 顯示全部樓層
09Z命名Kay,預測發展時間只有短短的1.5天。
000
WTPZ42 KNHC 190845
TCDEP2

TROPICAL STORM KAY DISCUSSION NUMBER   3
NWS NATIONAL HURRICANE CENTER MIAMI FL       EP122016
300 AM MDT FRI AUG 19 2016

The center continues to be on the edge or very near a large area of
developing convection. Dvorak T-number estimates remain below
tropical storm strength, but a recent ASCAT-B pass around 0500 UTC
showed a few wind vectors of 35 kt in the southeastern quadrant. On
this basis, the depression has been upgraded to tropical storm
status. Kay continues to be affected by northeasterly shear, but
conditions are still favorable for slight strengthening during the
next 24 hours before the cyclone encounters a more stable
environment.
After that time, gradual weakening should begin.

The best estimate of the initial motion is 315/06. Kay is embedded
within light steering currents around a weak ridge over Mexico, and
this pattern is forecast to change little. Most of the track models
keep Kay moving northwestward with a gradual bend to the west as the
cyclones weakens. The exception is the GFS which brings a very weak
system close to Baja California. This GFS solution does not appear
to be realistic at this time. The NHC forecast follows the bulk of
the guidance, shifting a little bit to the left from the previous
NHC forecast and following the multimodel consensus TVCN.


FORECAST POSITIONS AND MAX WINDS

INIT  19/0900Z 18.4N 110.9W   35 KT  40 MPH
12H  19/1800Z 19.1N 111.4W   35 KT  40 MPH
24H  20/0600Z 20.0N 111.9W   40 KT  45 MPH
36H  20/1800Z 20.6N 112.2W   35 KT  40 MPH
48H  21/0600Z 21.0N 112.5W   30 KT  35 MPH
72H  22/0600Z 21.7N 113.2W   25 KT  30 MPH...POST-TROP/REMNT LOW
96H  23/0600Z 22.5N 114.5W   25 KT  30 MPH...POST-TROP/REMNT LOW
120H  24/0600Z 23.0N 117.0W   20 KT  25 MPH...POST-TROP/REMNT LOW

$$
Forecaster Avila

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