Stationary Occlusion Front 10 Aug 2005/00 UTC - 11 Aug 2005/18 UTC: Isentropes
10 Aug 2005/00 UTC
In this image sequence the location of the occlusion front can be seen clearly throughout the time period between 10 and 11 August 2005. The isentropic trough (represents warmer and moister air at upper levels) shows the location of the occlusion. Also the potentially unstable stratification of air in the northern part of the cross section can clearly be seen.
10 Aug 2005/06 UTC
The occlusion process continues. The tilt of the isentropic trough is has changed during the past 6 hours, clearly indicating a process of the onward occlusion of this system.
10 Aug 2005/12 UTC
The occlusion process continues, and occlusion moves slowly northwards. Still quite unstable at higher layers of troposphere on the northern part of the cross section.
10 Aug 2005/18 UTC
The occlusion process continues, and occlusion moves slowly northwards.
11 Aug 2005/00 UTC
The occlusion process continues, and occlusion is at its northernmost location now.
11 Aug 2005/06 UTC
Isentropic trough is still very clearly seen, a pocket of relatively warm air located as low as at 600-800 hPa layer.
11 Aug 2005/12 UTC
The pocket of warm air is detached from the warm air above.
