開啟輔助訪問
 找回密碼
 立即加入

01L.Ana 北大首旋

簽到天數: 483 天

[LV.9]以壇為家II

dom|2021-5-24 10:51 | 顯示全部樓層
NHC03Z判定成為後熱帶氣旋
660
WTNT41 KNHC 240242
TCDAT1

Post-Tropical Cyclone Ana Discussion Number   8
NWS National Hurricane Center Miami FL       AL012021
1100 PM AST Sun May 23 2021

Ana has mainly remained devoid of deep and organized convection
today, with only a couple of short-lived bursts noted in satellite
imagery earlier this morning. The cyclone has been an exposed cloud
swirl through the afternoon and evening hours, and Ana continues
moving into a hostile environment characterized by cool sea-surface
temperatures, dry mid-level air, and increasing vertical wind shear.
Thus, Ana has become a post-tropical cyclone, and this will be the
final NHC advisory on the system.

Although a recent ASCAT-B pass missed the center of post-tropical
Ana, it still shows an area of 30-35 kt winds in the southeast
quadrant of the low near the edge of the swath. Therefore, the
initial intensity is set at 35 kt, with the slightly stronger winds
likely just a product of the accelerating forward speed of the
system. The post-tropical cyclone is embedded in deep-layer
southwesterly flow and will continue to accelerate northeastward
until it opens up into a trough and becomes absorbed by a strong
baroclinic zone approaching from the northwest on Monday.

Additional information on post-tropical Ana can be found in High
Seas Forecasts issued by the National Weather Service, under AWIPS
header NFDHSFAT1, WMO header FZNT01 KWBC, and online at
ocean.weather.gov/shtml/NFDHSFAT1.php


FORECAST POSITIONS AND MAX WINDS

INIT  24/0300Z 38.3N  55.2W   35 KT  40 MPH...POST-TROPICAL
12H  24/1200Z 41.0N  50.5W   30 KT  35 MPH...POST-TROP/REMNT LOW
24H  25/0000Z...DISSIPATED

$$
Forecaster Reinhart/Brown
024015_5day_cone_no_line_and_wind.png
回復

使用道具 舉報

簽到天數: 483 天

[LV.9]以壇為家II

dom|2021-5-24 19:01 | 顯示全部樓層
NHC撤銷評級
ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 AM EDT Mon May 24 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center has issued the last advisory on
Post-Tropical Cyclone Ana, located several hundred miles northeast
of Bermuda.

Tropical cyclone formation is not expected during the next 5 days.

$$
Forecaster Cangialosi
NNNN
ED2E1981-EF57-42BB-B205-92EBD467E810.png
回復

使用道具 舉報

123
快速回覆
您需要登錄後才可以回帖 登錄 | 立即加入

本版積分規則

本平台僅供學術討論之用,預報應以氣象局為準

威普網站虛擬主機贊助公司

臺灣第一個天氣類型社群平台 即時天氣資訊、精準颱風動態

線上客服
FB傳送訊息
廣告行銷
精準行銷 物超所值
官方粉專
發佈 快速回復 返回頂部 返回列表