SPLIT FRONT - KEY PARAMETERS
- Temperature advection (WA):
The ridge of WA is superimposed on the high level cloudiness representing the warm air rising on the upper level frontal surface.
- Jet streak and positive vorticity advection (PVA):
A jet streak approaches the cloud band at a large acute angle accompanied by a PVA maximum in the left exit region.
Very dry values in the upper and middle troposphere above the low level cloud band and a strong gradient between the two cloud bands at different heights can be observed.
- Relative streams and isentropic potential vorticity (IPV):
Typical configuration of relative streams as described in Meteorological physical background, IPV anomaly on relevant isentropic surfaces indicating stratospheric air.