News 12 Storm Watch Team Meteorologist Julian Seawright says Monday will become cloudy before some evening showers arrive on Long Island. NEW: Slight risk for flash flooding overnight Monday for Nassau and parts of Suffolk County. Thunderstorms that could bring some isolated heavy downpours are expected late Monday.

NOW: A warm summer day with a night to compliment it. NEXT: Some sun to start -- then, cloudy on Monday with rain overnight into Tuesday. FORECAST: OVERNIGHT: Partly cloudy and mild. Low temperatures will be in the upper-60s near 70 degrees.

MONDAY: Some sun to start, then becoming cloudy. Dry for most of the day, then storms arrive after sunset. Highs in the mid-80s. Lows near 70.

TUESDAY -- WEATHER TO WATCH: Mostly cloudy with on and off storms. Highs in the low-80s. Lows in the mid-60s.

WEDNESDAY -- PICK OF THE WEEK: Mostly sunny and less humid. Highs near 80. Lows in the mid-60s. THURSDAY: Mostly sunny and pleasant to start. A stray shower or storm later in the day. Highs in the 80s. Lows in the mid-60s. FRIDAY: Rain expected early, then clearing out for the weekend. Highs in the 80s. NEXT WEEKEND: It looks dry so far. Saturday will have mostly sunny skies. Temperatures could soar into the 90s for the start of next week.