Long Island Severe Weather Update

Sunday will not be a beach day on Long Island.

In fact, you may just want to stay inside all day. Rain is expected throughout the day and the potential for strong to severe thunderstorms has led the National Weather Service to issue a hazardous weather outlook for the region.

The threat of severe weather will be at its highest in the afternoon and evening, the NWS says. Thunderstorms will have the potential to produce heavy rain (approaching an inch an hour), damaging wind gusts of at least 58 mph and small hail.

Before the rain arrives, a coastal flood advisory will be in effect from 7 p.m. to 10 p.m. for southern Nassau. Flooding of the most vulnerable shore roads and basements will be possible.

According to AccuWeather, afternoon showers and thunderstorms are typical during this time of the year, but the storms that are expected to fire during the afternoon and evening on Sunday will be rather volatile.

• Sign up here for weather and breaking news email alerts from Patch

"We are actually entering the peak of the severe weather season for the Northeast, which typically runs from the beginning of May through the end of June," AccuWeather Senior Meteorologist Dave Dombek said.

Here's the full forecast:

Saturday Afternoon- Partly sunny, with a high near 74. South wind around 9 mph.

Saturday Night- A chance of showers, mainly after 2am. Mostly cloudy, with a low around 64. South wind 6 to 9 mph. Chance of precipitation is 40%.

Sunday- Showers likely, then showers and possibly a thunderstorm after noon. Some of the storms could produce small hail, gusty winds, and heavy rain. High near 71. Southeast wind 9 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night- Showers and possibly a thunderstorm, mainly before midnight, then a chance of showers and thunderstorms after midnight. Some of the storms could produce small hail, gusty winds, and heavy rain. Low around 65. South wind 13 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Monday- A slight chance of showers before noon. Mostly sunny, with a high near 76. Southwest wind around 15 mph. Chance of precipitation is 20%.