Overview

• The National Weather Service has issued a flood watch until 1 a.m. Thursday for Philadelphia and nearby Pennsylvania, New Jersey and Delaware counties.
• The Storm Prediction Center has placed the region under a marginal risk for severe storms while the Weather Prediction Center warns of excessive rainfall.
• Dew points are expected to climb into the low to mid 70s, making it feel like the upper 90s despite the absence of a heat advisory.
• The approaching cold front is forecast to trigger slow-moving afternoon and evening storms with heavy downpours and frequent lightning before stalling on Thursday.
• Forecasters are monitoring Tropical Storm Erin, which models project could become a major hurricane and shift toward the Bahamas and Bermuda over the weekend, with possible U.S. weather impacts next week.