The National Weather Service is tracking a severe thunderstorm along a line extending from 11 miles east of Poplarville to near Pearlington, moving east at 50 mph.
Dime-sized hail and winds in excess of 30 mph are accompanying the storm, which is affecting Harrison and Hancock counties.
Residents are advised to take shelter.
Also a tornado watch remains in effect for most of the state until 6 p.m.
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At 9:30 a.m., this watch was issued for 45 of the state's 82 counties, including Hancock, Harrison, Jackson, George, Stone and Pearl River counties.
The watch is part of a storm system moving through Louisiana and Mississippi, bringing thunderstorms into the area. South Mississippi has a 90 percent chance of rain, easing off tonight.