Abstract: Based on the measured data of Lishui automatic weather observation station and MICAPS general information,the weather conditions of frequent occurrence of forest fires in Lishui city from February to March in 2008 were analyzed from the factors of the weather situation,precipitation,air temperature,relative humidity,wind speed,the main source of fire.It showed that the main reasons for frequency forest fires with a wide range was that the pre-precipitation was less than normal,high altitude to the ground were conducive to good weather continued control over the situation in circulation and which with the temperatures increasing,the relative humidity decreasing,the air was very dry,rapid fire rating soared to 5,lots of forest dead and combustible dramatic increased in the forest after rarely seen freezing cold rain and snow disaster trauma in Lishui.

Key words: Lishui city, Forest fire, Weather conditions