Updated 20JUL2004
 |
| Feature | Movement | Changes Pressure | Dew Pt |
Pre-Frontal Wind |
Wind at FROPA |
Post-Frontal Wind |
Arriving Air Mass |
| Cold Front | Direction of triangles |
 |
S - SW | W | W-NW-N | cP cA mP |
| Warm Front | Direction of semi-circles |
 |
E-SE | SE-S | S-SW | cT mT |
| Stationary Front | Quasi-stationary |  |
North side E-NE South side W-SW |
NA | NA | North cP cA mP South cT mT |
| Occluded Front | Direction of triangles and semi-circles |
 |
SE-S-SW DEPENDS ON POSITION RELATIVE TO SFC LOW |
W DEPENDS ON POSITION RELATIVE TO SFC LOW |
SW-W-NW DEPENDS ON POSITION RELATIVE TO SFC LOW |
North cP cA mP South cT mT |
| Dryline | Direction of semi-circles |
 |
S-SE | W | SW-W | cT or superior replacing mT return flow |