NATCHEZ — Heavy rainfall and thunderstorms Monday put Adams County in a flash flood warning and Concordia Parish in a flood watch for the majority of the afternoon and evening.

A large band of showers and thunderstorms producing heavy rainfall moved into the area Monday.

National Weather Service Meteorologist and Forecaster Mark McAllister said the storm came from a low-pressure system in the gulf.

“It’s just picking up all that moisture in the gulf,” McAllister said. “We’ve been watching it for a while.”

The Monday storms caused approximately 5 inches of rain to fall.

An additional 1 to 3 inches of rain was predicted overnight.

McAllister said the continual rainfall from the past several days resulted in saturated ground conditions, which caused Monday’s extra rain to produce rising water levels in creeks and rivers.

McAllister said the result was ponding of water in low lying areas with poor drainage.

“The soil has soaked up everything it can so the water has nowhere to go and just starts to runoff anywhere it can,” McAllister said.

Adams County Emergency Management Director Stan Owens said the heavy rains have his office keeping an eye on problematic areas.

“Other than some street flooding, no real major issues have happened yet,” Owens said. “We just have to keep an eye on everything.”

The extra rainfall also extended the cresting of the Mississippi River, which was expected to crest at 45.7 feet last Tuesday.

The stage of the river was 46.45 feet at 4 p.m. Monday.

Owens said the rainfall in Natchez the past few days has made him observe the river levels more carefully, but doesn’t think it will cause major concerns.

“This rain locally really doesn’t affect the Mississippi River here,” Owens said. “Whatever falls north of us is what really worries us.”

Flood stage in Natchez is 48 feet, but no significant trouble is caused until the crest tops 50. However, the National Weather Service begins its “action stage” warning at 38 feet.

Last spring, the river broke all historical crest records, reaching 61.95 at Natchez.

The river is not expected to reach flood stage at Natchez this month.