This cloud system extends from the front's surface position to about 500 to 700 miles in advance
of it (Figure 3-15).
Figure 3-14 Warm Front
A warm front typically moves at a slower speed than a cold front, 15 knots on average, and
produces a more gradual frontal slope, as well as sloping forward, ahead of the surface front.
Because of this slower speed and gradual slope, warm fronts are not as well defined as cold
fronts. The winds shift across a warm front from the SE to the SW.
Figure 3-15 Warm Front Cloud Formation
Mechanics of Frontal Systems 3-15