Hurricane Irma Discussion Number 48 - 颱風討論

By Liam
at 2017-09-11T11:40

Table of Contents

Hurricane Irma Discussion Number 48
NWS National Hurricane Center Miami FL AL112017
1100 PM EDT Sun Sep 10 2017

Irma's center has moved northward across the western Florida
peninsula since it made landfall earlier this afternoon, and it is
now located over west-central Florida. NOAA WSR-88D radar data from
Tampa Bay are showing 95-100 kt winds at an elevation of about 3500
ft, so the hurricane's intensity is estimated to be 85 kt. Irma
continues to have a large wind field, and exceptional hurricane-
force wind gusts are still occurring well to the east of the center
along the Florida east coast.

自從今日午後稍早登陸後,Irma的中心已經向北移動穿過西佛羅里達半島
並這現在位於佛州中西部. 來自坦帕灣區的NOAA WSR-88D雷達資料顯示有
3500呎高度有95到100節風力, 因此颶風強度估計有85節
Irma持續擁有廣大的風場,並且良好的颶風風力陣風仍正在
佛州東海岸中部以東出現

Irma appears to be making some progress to the west of due north,
and the longer-term initial motion is 350/12 kt. The cyclone is
expected to swing around the eastern side of a mid-level disturbance
currently located along the U.S. Gulf Coast, which should impart a
north-northwestward to northwestward motion during the next 48
hours. Due to its recent more inland push, Irma's center is now
forecast to remain over Florida and then move over the southeastern
United States for the duration of its existence. Due to continued
land interaction and strong shear of over 30 kt, Irma should
continue to lose strength and fall below hurricane intensity
on Monday. The cyclone is then expected to become a remnant low
over western Tennessee by day 3 and dissipate by day 4.

Irma似乎正在西北向北行進取得進展,現行長期運動為350度12節
預計此氣旋將在位於美國墨西哥灣沿岸一個中度的擾動的東部周圍左右擺動
這應該在接下來四十八小時轉為北北西向西北運動
由於現在內陸的推動,Irma的中心預計在它存在期間內將維持在佛州上空,
隨後往美國東南部移動
由於持續在陸地的交互作用與超過30節強烈風切的影響, Irma應該繼續失去強度
並在周一降到颶風強度以下
之後預料這氣旋在第三日於田納西州成為殘餘低壓,在第四日時消散

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當日下午在那不勒斯(Naples)一個NOAA潮汐測站測得變化
https://tidesandcurrents.noaa.gov/stationhome.html?id=8725110

https://i.imgur.com/rfV2uvi.png