Tropical Storm Karen continues move toward northern Gulf Coast

Kevin Mcgill and Stacey Plaisance in ABC News via Associated Press: Tropical Storm Karen continued chugging toward the northern Gulf Coast on Saturday, with forecasters predicting rain, potential flooding and a decrease in speed later in the day.

The National Hurricane Center reported early Saturday that Karen's maximum sustained winds had dropped to 40 mph, making it a weak tropical storm. It was moving north at 10 mph (16 kph), and center forecasters said in their advisory that they expect Karen to decrease in speed later Saturday and turn toward the northeast.

A tropical storm warning is in effect from Morgan City to the mouth of the Pearl River, which forms part of the border between Louisiana and Mississippi. A tropical storm watch covers the New Orleans area and a stretch from east of the Pearl River's mouth to Indian Pass, Fla.

Forecasters expect the storm's center to be in the warning area Saturday night or Sunday morning, and they note that an increase in speed is possible Sunday. Rain accumulations of 1 to 3 inches over the central Gulf Coast and southeastern U.S. are possible through Monday night, with isolated totals up to 6 inches.

At the hurricane center in Miami, forecasters said the storm no longer had a chance of strengthening into a hurricane. Karen began losing some of its punch late Friday, after a busy day of preparations along the Gulf Coast for the storm. Karen is a late-arriving worry in what had been a slow hurricane season in the U.S. Karen would be the second named storm to make landfall in the U.S. — the first since Tropical Storm Andrea hit Florida in June....

Tropical Storm Karen on October 3, 2013, shot by NASA