By Llarisa Abreu

PHILADELPHIA (CBS) — All eyes are on the south Thursday, as a tropical low tries to develop. The area of tropical moisture is expected to ride up the East Coast and approach the Delaware Valley Friday morning.

A flash flood watch has been issued for Southeastern Pennsylvania, South Jersey and Delaware from 12 a.m. Friday through 4 p.m.

The system was declared Tropical Storm Fay by the National Hurricane Center Thursday afternoon.

But regardless of intensity, impacts with this system will be felt across all neighborhoods; from the Shore Points to inland areas of the Lehigh Valley.

The rain is expected to start down south and spread north as early as late tonight. Becoming steadier and heavier, as well as more widespread throughout Friday morning. The heaviest rain will fall in the afternoon through Friday night. As much as 1-3 inches — locally up to 4 inches — of rain could fall from Friday morning through late Friday night.

The flood threat is high at this time for any location that is prone to flooding. Creeks and rivers may become swollen aiding to the potential for flooding.

Tidal flooding will be held to a minimum on Friday and over the weekend even with overall poor beach conditions. It will be a windy day along the Jersey Shore points.

While there is no tornado or severe weather threat on Friday, we could see severe weather on Saturday. There is a marginal risk — level 1 of 5 — for severe weather in the region Saturday.

There could be strong wind gusts and locally heavy rain.

In addition, seas will be rough along the coast. Dangerous and life-threatening rip currents will develop Friday, a high risk for rip currents will remain possible through the weekend.

A cold front will be moving into the area Saturday prompting storms and some local downpours. Sunday looks to be quieter but thunderstorms aren’t out of the question through Monday.