THICKNESS RIDGE CLOUDINESS - KEY PARAMETERS

• Equivalent thickness and Thermal front parameter (TFP):
  Within the ridge of the equivalent thickness (not accompanied by a TFP), the TFP zones are connected to the consecutive CF and the WF if existing.
• Equivalent potential temperature at 850 hPa:
  The thickness ridge cloud lies within a ridge or a maximum of the equivalent potential temperature at 850 hPa
• Height Contours at 1000 hPa and 500 hPa:
  The Thickness Ridge Cloudiness is situated within the ridge of the 1000 hPa and the 500 hPa height, in front of a frontal system
• Temperature advection (TA) at 700 hPa:
  A distinct maximum of WA is superimposed upon the Thickness Ridge Cloudiness.
• Showalter index:
  There is usually a stable stratification associated with Thickness Ridge Cloudiness, but during the summer season the area within the thickness ridge is often unstable.

Equivalent thickness and Thermal front parameter (TFP)

	20 June 2000/06.00 UTC - Meteosat IR image; blue: thermal front parameter (TFP) 500/850 hPa, green: equivalent thickness 500/850 hPa

Equivalent potential temperature at 850 hPa

	20 June 2000/06.00 UTC - Meteosat IR image; magenta: equivalent potential temperature 850 hPa

Height Contours at 1000 hPa and 500 hPa

	20 June 2000/06.00 UTC - Meteosat IR image; magenta: height contours 1000 hPa, cyan: height contours 500 hPa

Temperature advection (TA) at 700 hPa

	20 June 2000/06.00 UTC - Meteosat IR image; red dashed: temperature advection - CA 700 hPa, red solid: temperature advection - WA 700 hPa

Showalter index

	20 June 2000/06.00 UTC - Meteosat IR image; yellow: Showalter index 500/850 hPa