The picture below is a simplified map of the surface weather in a certain area at a certain time. Read the picture and answer questions 2-3. 2． The wind direction at M in the picture is ( ) 3. Weather that produces precipitation in the area shown

It can be seen from the numerical changes of the isobaric line in the figure that the precipitation area is located near the low-pressure trough. Find a point on the most curved convex part of each isobars near the precipitation area, and connect the points with a dotted line to find the location of the low-pressure trough. The low-pressure trough is the location where the front forms. It can be seen from the relatively dense isobars in the precipitation area and the proximity to the anticyclone center in the figure that the cold air mass is strong and the front formed is a cold front.