Isolated to scattered thunderstorms are possible this afternoon and this evening. Some storms may be severe with a primary threat of damaging winds.

Additional thunderstorms, some strong to severe, are possible Monday afternoon and evening.

Heavy rainfall is also possible from Monday night into Tuesday night as Tropical Storm Isaias approaches. This may result in flash flooding and potentially river and stream flooding.

The forecast:

Today: Showers and possibly a thunderstorm, mainly before 11 a.m., then a chance of showers and thunderstorms after 11 a.m. Some of the storms could produce gusty winds and heavy rain. High near 86. Southeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight: A chance of showers and thunderstorms, mainly before midnight. Some of the storms could produce gusty winds. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday: A chance of showers and thunderstorms after 3 p.m. Partly sunny, with a high near 82. West wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 9 p.m. Some of the storms could produce heavy rain. Low around 67. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Tuesday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 75. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

Tuesday Night: Showers and possibly a thunderstorm before 9 p.m., then a chance of showers and thunderstorms after 9 p.m. Some of the storms could produce heavy rain. Low around 65. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Wednesday: A chance of showers and thunderstorms before 9 a.m. Mostly sunny, with a high near 80. Chance of precipitation is 40%.

Wednesday Night: Mostly clear, with a low around 58.

Thursday: Sunny, with a high near 80.

Thursday Night: Partly cloudy, with a low around 61.

Friday: Mostly sunny, with a high near 81.

Friday Night: Partly cloudy, with a low around 63.

Saturday: A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.