System brings thunderstorms, flooding threat to LI

The slow-moving storm moved in as part of a thin squall line. The system moved into western Long Island around 3 p.m., and hit the East End shortly after.
Rain fell heavily across Long Island, but lightened up not long after. Some areas around the South Shore faced flooding threats, with about an inch of rain falling.
Overnight lows will be in the low-60s with clearer skies.
PHOTOS: Track the storms at different parts of the day