熱帶風暴漢娜 - 第三十七報 - 颱風討論

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WTNT43 KNHC 060255
TCDAT3
TROPICAL STORM HANNA DISCUSSION NUMBER 37
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082008
1100 PM EDT FRI SEP 05 2008

DATA FROM A RECONNAISSACE PLANE INDICATE THAT THE SURFACE PRESSURE
HAS DROPPED TO 978 MB BUT WINDS HAVE NOT INCREASED. INITIAL
INTENSITY IS KEPT AT 60 KNOTS. THE AREA OF STRONG WINDS HAS BEEN
SHRINKING SINCE HANNA APPEARS TO BE MORE TROPICAL AND THERE IS A
PERSISTENT AND LARGE AREA OF DEEP CONVECTION NEAR THE CENTER. HANNA
COULD REACH THE COAST IN LESS THAN 12 HOURS AS A HURRICANE SINCE IT
ONLY NEEDS FIVE KNOTS TO BE ONE. HOWEVER...THERE IS NOT MUCH
DIFFERENCE BETWEEN A 60-KT TROPICAL STORM AND A 65-KT HURRICANE.

RADAR AND RECONNAISSANCE FIXES INDICATE THAT HANNA IS MOVING
NORTHWARD AT 17 KNOTS. THE CYCLONE IS ALREADY EMBEDDED IN A STRONG
SOUTHERLY AND SOUTHWESTERLY FLOW...AND SOON HANNA SHOULD BEGIN TO
TURN TO THE NORTHEAST WITH AN INCREASE IN FORWARD SPEED. AFTER
LANDFALL...AS HANNA BECOMES FULLY INVOLVED WITH THE MID-LATITUDE
FLOW...IT SHOULD BECOME EXTRATROPICAL IN ABOUT 24 TO 36 HOURS.
DURING THIS PERIOD...HANNA WILL BE MOVING VERY CLOSE TO OR OVER THE
NORTHEAST COAST OF THE UNITED STATES.

偵察機的資料指示出表面氣壓已降到九七八毫巴, 但風力尚未增加.
起始強度保持在六十節. 強風區域已縮水自從漢娜顯露出更加熱帶性並且中心附近
有減不弱和大範圍深對流. 自從她只需要五節,漢娜應該能在十二小時內以颶風身份接觸
海岸. 然而...
在六十節的熱帶風暴和六十五節的颶風之間沒啥差異

雷達和偵察機定位指示漢娜正以十七節西北移動. 氣旋幾乎嵌入強烈的南與西南流...很
快地漢娜應該開始加速轉東北. 登陸之後...當漢娜
變成和中緯度流全交纏一起... 這應該在
二十四到三十六小時內會變成溫帶(氣旋)...
DURING THIS PERIOD...漢娜將會移動非常接近
或位於美國東北岸

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Geheimer Wetter- und Seeschlüssel der Kriegsmarine
Teil 2
Watterkurzschlüssel (3 Auflage)

Oberkommando de Kriegsmarine Berlin 1942


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