A slow moving cold front is expected to bring tropical downpours to parts of the Carolinas Tuesday afternoon and evening, which could lead to flash flooding.
The cold front will slide into the mountains during the afternoon hours and stall, which will allow copious amounts of moisture to stream northward into the foothills and piedmont of NC. Numerous showers and storms are expected to develop in the afternoon hours Tuesday and lasting into the overnight hours.
With the slow moving nature of the showers and storms, coupled with a tropical airmass, flash flooding could become an issue. The Weather Prediction Center has placed much of the foothills and piedmont of NC under a slight risk of excessive rain on Tuesday.
The NAM computer model shows the situation on Tuesday very nicely. From 2:00 a.m. Tuesday through 2:00 a.m. Wednesday, numerous showers and storms are expected. Nearly everyone is expected to receive between a quarter to a half of an inch of rain; however, many of these showers and storms will produce locally heavier rainfall.
Take the map above with a grain of salt; however, the general idea is that some areas could see 1-3 inches of rain where the heaviest showers and storms develop tomorrow.
Flash flooding is expected to remain an issue through the end of the week with shower and storm chances remaining high with the stalled front lingering in the Carolinas.