What are Fronts and its type ?

 

A cold front is cold air displacing warm air.

Steep leading edge — friction slows surface advance, moves quickly–25 knts up to 40 knts faster=steeper

General weather characteristics of a Cold Front Weather Feature                                          Before Frontal  Passage           Region of Front         After Frontal Passage                                Winds            S-SW                                 gusty                  W-NW                                                                  Temperature    Warm                   Sudden decrease        Steady Cooling                                          Dew Point      high; remains steady      Steady                 Decreases                                                Pressure       Falling steadily       Minimum; rapid rise    steady rise                                          Visibility     Fair to Poor               Poor then improving    good                                                        Clouds         Ci, Cs Cb                      Cb                                    Cu                                                    Precipitation  showers                heavy precip.                   clearing

 warm front is warm air displacing cool air diagram. Shallow leading edge warm air must “overrun” cold air–cold air recedes moves slow 10-15 knts.

There are two kinds of occluded fronts

Cold occlusion-cold front catches up with warm front. Ns, Tcu, Cb warm very cold .

Warm occlusion mostly in NW. Warm cool mP off ocean cold cP warm occlusion.-+

Precipitation is similar to the cold occlusion.