Update 3:50 p.m. The National Weather Service expects the Conroe area to have showers and thunderstorms this afternoon and tonight. The majority of the storms are expected to occur before 7 p.m. with the possibility of heavy rain. Posted 1:35 p.m. Harris and Montgomery counties under thunderstorm warning The National Weather Service has issued a warning that severe thunderstorms capable of producing tornadoes, sever winds, and hail are expected in Harris and Montgomery counties today. A tornado watch is in effect until 6 p.m. for Montgomery county.