This North Atlantic satellite image shows several low pressure systems lined up in The North Atlantic. I have labelled them for you to see, A, B, C and D.
(A) label is the weather we have had today and now. This systems will be moving Eastward overnight and will have moved out of the way for most of tomorrow when there will be a slight increase in the air pressure to bring mainly a dry day. During the early hours of Monday low pressure system (B) will bring rain with a period of heavy rain during Monday slowly clearing eastwards during the afternoon. Low pressure system (C) will bring some heavy rain sometime during Tuesday. Then low pressure system (D) will bring more wet weather on Wednesday.