The watch, which went into effect 4 a.m. Tuesday, lasts through 4 p.m.
Heavy rain that started in the pre-dawn hours could cause urban flooding along streets and low-lying areas, the weather service said.
The showers and thunderstorms in the area could bring rainfall amounts of 1 to 2 inches, with some areas getting as much as 3 inches.
Hourly rain rates could be up to 2 inches per hour, the weather service said.
High temperatures will approach 77 degrees with a 100 percent chance of rain on Tuesday.
Showers are likely with a possible thunderstorm before midnight Tuesday night, then a slight chance of showers between midnight and 3 a.m.
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