As quoted by the source on GSMArena :
The title “You may want to take an umbrella since rain is expected during this afternoon” on the first screenshot is in fact a new feature.
It intends to provide weather notifications with an easy to communicate and human touch. A trend that lot of manufacturers are embracing is the implementation of clean, flat UI elements and LG seems to have integrated their new Optimus UI with Android Kitkat very well on that end.
Are you looking forward to the G3? Also, tell us if you like LG’s approach better than Samsung’s.