A flash flood watch has been issued for southeast Louisiana with severe weather expected to impact the area overnight and into the weekend, according to the National Weather Service.
Much of South Louisiana, including New Orleans, Baton Rouge and surrounding parishes, stands at an "enhanced" risk for severe thunderstorms beginning early Saturday. Between 2 and 4 inches of rain is expected, NWS warns, with some areas seeing as much as 6 inches.
A Flash Flood Watch has issued for Southeast Louisiana & parts of Southern Mississippi. Widespread 2" to 4" are expected late tonight through Saturday night with some areas receiving more than 6". #lawx #mswx pic.twitter.com/uP2T99A8Rv— NWS New Orleans (@NWSNewOrleans) April 13, 2018
An "enhanced" risk of severe weather, according to the NWS, means numerous severe storms are possible along with tornadoes of EF-2 strength or greater, winds exceeding 70 miles per hour and hail 2 or more inches in diameter.
The NWS' storm prediction center uses "marginal," "slight," "enhanced," "moderate" and "high" to quantify severe weather risk. "Moderate" and "high" are rarely used and typically saved for particularly severe scenarios.
The main threats with these storms will be damaging wind gusts, a few tornadoes, heavy rainfall with localized flooding and frequent lightning.
Flood warnings have been issued along the Mississippi River from Red River Landing to Baton Rouge beginning Friday, the NWS said. A squall line Saturday will be capable of producing damaging wind gusts, tornadoes and heavy rainfall.
Flood warnings are expected to remain throughout the weekend.
The "robust" storm system is expected to move across the central U.S. and bring multiple hazards throughout the weekend, NWS said.
A "dryline" and cold front is expected to sweep across the south, forecasters said, causing widespread thunderstorms. Much of Louisiana is at risk for "excessive" rainfall, with flash flooding possible throughout the day Saturday.
The storms are expected to dissipate by Sunday, which is forecast for sunny weather. Colder temperatures will stick around, however, with a high in the lows 60s.