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All of England and Wales
Channel Islands
THREATS
Tornadoes; wind gusts to 70mph; hail to 15mm diameter; CG lightning (hail/lightning post-cold front)
SYNOPSIS
Strong cold front will move east/south-east across the area tonight. Whilst deep convection is not expected along the front, strongly-forced shallow convection is simulated, with a good chance of LEWP/bowing segments, and misocyclone development. Such development brings the risk of wind gusts of 60-70mph, and short-lived tornadoes. There is a chance of a number of tornadoes overnight.
Tomorrow morning, one or more post-frontal short-wave troughs is expected to race eastwards, especially (but not exclusively) across southern parts. If convection fires on these, hail/thunder/strong winds and (perhaps) tornadoes will be possible - indeed, a stronger tornado (T4) is possible should this convection develop.
The major driving trough is expected to move across late morning into the afternoon. The watch may need to be extended/re-issued at 1200GMT tomorrow.
Dozens of homes in Derbyshire have been damaged by what is believed to have been a tornado.