Case Study of a Severe Storm

Potential temperature on the tropopause defined as a constant PV surface at 12GMT on February 17, 2003. High/warm tropopause is indicated by red, and low/cold tropopause by blue.
Vertical section of the storm on Feb. 17, 2003 along the line in the previous figure (35oN). Shown are a constant PV surface (blue), the potential temperature (yellow), and the meridional wind (black). Warm surface air can be inferred from the dip in the potential temperature contours.
850hPa saturation equivalent potential temperature (from red to orange to pink), and surface pressure (black) at 12GMT on February 17, 2003.
	This map summarizes our discussions. The cold (low) tropopause and warm surface air induce a surface low (L) system. Tropopause (blue) on a constant potential temperature surface, warm 850hPa saturation equivalent potential temperature (red), and surface pressure (b lack) at 12GMT on February 17, 2003.

Front page What's the Tropopause? Tropopause Variations and Cyclogenesis? Case Study of a Severe Storm? (you're here) How a Full PV Weather Map is Made?