For?better?service?of?12h?severe?weather?forecasting?in?the?flooding?seasons?in?Anhui?Province,?based?on?1'x1NCEP?FNLanalyeis?data?(four?times?day?by?day)?during?2001-2009,?some?convective?parameters,?including?K,?CAРE,?SWEAT,?PWV?etc.?wereselected?as?predictors.?The?eigenvalue,?mean?value?and?historical?distribution?of?convective?parameters?of?different?kinds?of?strongconvective?weather?in?different?months?in?the?flooding?seasons?were?obtained.?By?comparatively?analyzing?the?distributions?of?theindices,?we?obtained?the?obvious?difference?between?severe?convection?of?the?same?kind?in?different?months?and?the?differencebetween?different?kinds?of?strong?convective?weather?in?different?months.?The?historical?distribution?characteristics?can?relect?theprobability?of?different?kinds?of?strong?convective?weather.