May 2005 at Reading
This event was centred over Brittany and in relatively small spatial extent. It coincided with some unusual warm surface temperatures over the UK (many places reported the warmest or 2nd warmest day of the year up to then). Mid-troposphere warming was particularly pronounced with south-westerly bringing warm air into the South-East and Northern-France. This lifted the tropopause giving rise to the event. This anomaly then moved slowly eastwards before dissipating over Poland on the 31st of May.
This event was centred over Brittany and in relatively small spatial extent. It coincided with some unusual warm surface temperatures over the UK (many places reported the warmest or 2nd warmest day of the year up to then). Mid-troposphere warming was particularly pronounced with south-westerly bringing warm air into the South-East and Northern-France. This lifted the tropopause giving rise to the event. This anomaly then moved slowly eastwards before dissipating over Poland on the 31st of May.