A yellow warning is in place from midday on 2 February until 9am the following day, with another alert from Friday until 6am on Saturday.
Forecasters warn of a small chance of homes and businesses flooding, and deep floodwater posing a danger to life.
Met Office Chief Forecaster Rebekah Hicks noted that while expected rainfall totals are not comparable to Storm Chandra, 25mm daily could still cause disruption and further flooding.
The RNLI has issued a warning for people near the coast in Devon and Cornwall due to potential 15ft waves with a long swell period, which could surge unexpectedly and sweep people into the sea.
Bookmark popover
Removed from bookmarks