The easterly wind was very strong in the Exeter area yesterday so the sea would have been surging directly towards the railway line. As a result of this I suspect NR» would have implemented Single Line Working (SLW) between DWW and TGM▸ (West) and would have cancelled these station calls to avoid making the resulting capacity issue even worse.
Ah yes - that makes some sense. Not that an
IET▸ would get drowned at Teignmouth as it might have at Dawlish, but rather these stops were left out because they had become stations on a highly limiting (capacity wise) single line section for the duration of the storm.