翻了一下The Naval War in the Baltic 1939–1945一书
作者有提到几个点
1.芬兰不想打列宁格勒
The Finnish forces had a superiority of two to one and they were able to
advance, while the Soviet forces were on a fast and chaotic retreat. The
German command wanted the Finnish forces to move quickly towards Leningrad,
so that they could meet the German forces as they advanced towards the city
from the south and west. Mannerheim declined. The Finnish government had no
desire to participate in an attack on Leningrad, and Finland also lacked the
necessary dive-bombers and heavy artillery to carry out such an operation. If
Finland had agreed, Leningrad would undoubtedly have fallen around the middle
of September.
德国指挥部希望芬兰迅速向列宁格勒发起进攻，以同时夹击该城市，但是Mannerheim(芬兰总司令)拒绝，芬兰无意参与，同时也缺乏必要的俯冲轰炸机及重型火炮来执行这样的行动。
作者认为，如果芬兰同意，列宁格勒会在9月中旬左右沦陷。
Mannerheim knew that Finland’s fate would be sealed if Germany lost the war
and he had helped them take Leningrad. At the time around the American entry
into the Second World War, diplomatic pressure, among other things, was put
on Finland by the United States, with the message that if Finland actively
participated in the capture of Leningrad or of the railway line between
Murmansk and Leningrad, then Finnish wishes would not be taken into account
after the war. Unlike Great Britain, the United States did not declare war on
Finland.
Mannerheim知道，如果芬兰攻击列宁格勒，就坐实了德国支持者的角色，一旦德国战败，芬兰就惨了，特别是美国在不断对芬兰施加外交压力。
(芬兰:美国，怕。)
2.苏联波罗的海舰队的火炮支援贯穿整个列宁格勒围城战，没有停过。
3.随着莫斯科的战斗陷入胶着，部分部队被调离列宁格勒战场。包括德国空军的VIII. Fliegerkorps
(事实上我一直认为德国空军比起德国陆军数量更不足以支撑东线战场的需求，特别是空军长时间承受西面盟军很巨大的空中压力，人手根本不够，但是还没有深入研究过)
作者在书中也非常重视、一直提及德国空中优势持续弱化的问题。
The Baltic Fleet air force had been gradually expanded. The aircraft were,
technologically speaking, not very sophisticated, and the pilots were not as
skilled as their German counterparts, but German air superiority was
gradually reduced in line with the German command being in need of offensive
and defensive aircraft on the other sections of the front. The air defences
in Leningrad had already in 1941 subjected the Luftwaffe to unacceptably high
losses.
4.德国东线战场北部的军事行动就算没有列宁格勒，也持续有由海上进行补给，甚至整个北半部战场的燃料供应几乎是由瑞典油轮运输来的。
Fuel supplies to the northern half of the Eastern Front were almost
exclusively transported by Swedish tankers – the Swedish government had
given its tacit approval to this traffic. The shipowners did incredibly well
out of it, and payment often came in oil, petrol and coal. There was also an
opportunity here to increase revenue, but the shipping transports cost the
lives of many Swedish sailors. Germany paid war reparations if the ships were
sunk because of acts of war; the standard marine insurance was no longer
valid, but the Germans were good payers, solely because of their need for
shipping tonnage.
我认为在整体战事来看，拿下通往内陆的铁路以使资源能从波罗的海送往莫斯科等内陆战场应该比列宁格勒的后勤价值要来的高，暴风行动的核心补给问题还是苏联内陆烂爆的地形。
列宁格勒的核心价值应该在苏联波罗的海舰队的完全消灭，不过单论此时对补给的影响，尽管波罗的海的海上运输时而受到苏联潜艇的攻击，但是数量不多，1942年，苏联潜艇约击沉45,000顿，共18艘船。
水面舰队基本上被水雷关厕所，最大的作用就是支援围城作战。
感觉最好还是别围列宁格勒，有海军支持的城市本来就比较难啃，德国又不是没有塔林来运送物资，只是路还是太烂阿。
总的来说将部队集中至更重要的战场对于大局我想会更有效益。