WARM FRONT BAND - KEY PARAMETERS
by ZAMG
- Equivalent thickness:
The cloud band of the Warm Front Band is within the crowding zone of the equivalent thickness. - Thermal front parameter (TFP):
The TFP can be found close to and parallel to the rear edge of the Warm Front cloud band. This is in contrast to the Ana Cold Front where the TFP accompanies the leading edge of the cloud band. - Warm advection (WA):
The whole frontal cloudiness is within a WA maximum, which increases towards the occlusion point. Consequently the maximum is in front of the frontal line. - Shear vorticity at 300 hPa:
The zero line coincides with the leading edge of the Warm Front cloud band. - Isotachs at 300 hPa:
The leading edge of the Warm Front is superimposed by a jet streak with intensities varying from case to case.
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10 January 1995/06.00 UTC - Meteosat IR image; thermal front parameter (TFP) 500/850 hPa, green: equivalent thickness
500/850 hPa
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10 January 1995/06.00 UTC - Meteosat IR image;red: temperature advection 500/1000 hPa, green: equivalent thickness
500/850 hPa
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10 January 1995/06.00 UTC - Meteosat IR image; yellow: isotachs 300 hPa, black: zero line of shear vorticity 300 hPa
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