SPLIT FRONT - WEATHER EVENTS

by ZAMG


Weather events are highly variable and have to be split into two parts: area concerning the upper level front and the shallow moist area.

Upper Front

Parameter Description
Precipitation
  • Moderate to heavy showery precipitation
  • Quite often thunderstorms are observed.
Temperature
  • No signicant change
Wind (incl. gusts)
  • Around embedded Cb's strong gusts are possible.
Other relevant information
  • The upper front at the transition between high and low cloud part
  • Hail and thunderstorms possible during whole year
  • Risk of moderate to severe icing and turbulence

Shallow moist area, included surface front

Parameter Description
Precipitation
  • Slight to moderate rain or drizzle
Temperature
  • Falls after the passage of the surface front
Wind (incl. gusts)
  • Veering of the wind at the front passage
Other relevant information
  • Precipitation in area of shallow moist zone behind upper front
  • Risk of moderate icing
  • With superimposed PVA-max showers and thunderstorms are possible.
  • With showers moderate to severe icing and turbulence

SUB-MENU OF SPLIT FRONT
TYPICAL APPEARANCE IN VERTICAL CROSS SECTIONS
REFERENCES