JPATS Weather - NETC

JPATS AVIATION WEATHER BOOKLET
Clouds and precipitation do not accompany inactive fronts. Sometimes the warm air mass is too
dry for clouds to form even after the air is lifted and cooled. Inactive fronts may also be referred
to as dry fronts.
The reason for showing an inactive front on the weather chart is to indicate the boundary of the
opposing air masses. Additionally, it displays the location of potentially unfavorable flying
weather. The warm air mass may gradually become more moist and lead to the formation of
clouds and precipitation in the frontal zone. In many cases the inactive front only has a shift in
the wind direction and a change in the temperature and pressure.
3-16 Version 3.2/Dec 08