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Showers and thunderstorms developing this afternoon with periods of heavy rain possible

/ July 18, 2021 at 8:11 AM

We’re starting today with partly cloudy skies and muggy temperatures in the mid-70s. This will give way to 90s ahead of the seabreeze this afternoon; heat indices will push 100° with low 70s surface dewpoints in place. Showers and thunderstorms will fire on the seabreeze possibly as soon as noon-1pm, which could portend some rainfall or lightning concerns at area beaches early this afternoon. The seabreeze will then make its usual daily inland trek, bringing the risk for showers and thunderstorms more inland with time. This will happen as a mid-level disturbance moves into the area, which will enhance the coverage of showers and thunderstorms today into tonight. Some areas of heavy rain are certainly possible, with the high-resolution model ensemble painting a 10% chance of 3″ of rain in 3 hours across the entire coastal plain. This could lead to isolated bouts of flooding, so we’ll want to watch this closely throughout the day.

Rain chances will continue overnight into Monday, with the risk for heavy rain continuing throughout the day Monday. More on that later today as we get the daytime guidance package in.