Case Study: 02 - 03 August 1997

• I. Introduction and SatRep Diagnosis for 02 August 1997/06.00 UTC
  • Introduction
  • Overview of satellite imagery for 02 August 06.00 UTC
  • Key parameters on isobaric surfaces for 02 August 06.00 UTC
  • Relative streams and conveyor belts for 02 August 06.00 UTC
• II. Development of Upper Level Low and Rapid Cyclogenesis
  • Introduction for Upper Level Low and Rapid Cyclogenesis
  • Very Short Range Forecast from 02 August 06.00 UTC - 18.00 UTC
  • Development of cloud configurations during Very Short Range Forecast
• III. Diagnosis for 03 August 1997/00.00 UTC
  • Overview of satellite imagery for 03 August 00.00 UTC
  • Key parameters on isobaric surfaces for 03 August 00.00 UTC
  • Relative streams and conveyor belts for 03 August 00.00 UTC
  • Summary
• IV. Diagnosis for 03 August 1997/06.00 UTC
  • Overview of satellite imagery for 03 August 06.00 UTC
  • Key parameters on isobaric surfaces for 03 August 06.00 UTC
• V. Very Short Range Forecast from 03 August 1997/06.00 UTC - 18.00 UTC
  • Introduction for Very Short Range Forecast
  • Development of cloud configurations during Very Short Range Forecast for 03 August 06.00 UTC - 18.00 UTC
  • Diagnosis for 03 August 18.00 UTC with parameters on isentropic surfaces

02 - 03 August 1997 - Development Of Cloud Configurations During Very Short Range Forecast For 03 August 06.00 UTC - 18.00 UTC

02 August 1997/12.00 UTC - Meteosat IR image	02 August 1997/18.00 UTC - Meteosat IR image
02 August 1997/12.00 UTC - Meteosat WV image	02 August 1997/18.00 UTC - Meteosat WV image

As can be seen from the IR (left and right image top) and WV images (left and right image bottom) a very intensive Rapid Cyclogenesis develops between 12.00 and 18.00 UTC. The most pronounced features are the intensive broadening of the WV Dark Stripe and the lowering of the cloud tops there; this happens in an area immediately to the south of Ireland. On the other hand there is a dramatic intensification of the cloudiness mostly in cellular convective form over and north-west of Ireland.

The latter fact will be emphasised with the help of relevant key parameters on isentropic surfaces (compare Diagnosis for 03 August 18.00 UTC with parameters on isentropic surfaces).