説明

Low relative humidity and fuel moisture values will impose an increased risk for fire danger this afternoon. Relative humidity values are expected to drop as low as 25% during peak heating hours across southwest Pennsylvania. In addition, southerly wind gusts to 15-20 mph at times are expected this afternoon, and this will work in tandem with the low RH values to create an increased risk for fire danger. Exercise enhanced caution with activities that involve open flames or sparks as fires can easily spread in these weather conditions.

使い方