Since a maritime air mass may have trouble rising over a mountain range, the coastal area will have a maritime climate but the inland area on the leeward side of the mountain range will have a warm dry climate. this is called the rainshadow effect polar cell prevailing winds gulf stream

Rainshadow effect -

Explanation:

Rainshadow effect -

it is phenomenon when air parcel passes over  ranges of mountain, it pass down the other side of mountain and get warms and dries out. The resultant dry air produces a rain shadow.  The area on the rain shadow are typically warm and obtain very less rainfall and very less  cloud cover. while on the other side i.e windward side of range of mountain receive heavy rainfall and cloud cover

answer; is roughly two weeks;