Convective Outlook: Mon 28 Dec 2020

LOW SLGT MDT HIGH SVR

What do these risk levels mean?

Convective Outlook

VALID 06:00 UTC Mon 28 Dec 2020 - 05:59 UTC Tue 29 Dec 2020

ISSUED 08:31 UTC Mon 28 Dec 2020

ISSUED BY: Dan

Large upper trough covers the British Isles on Monday, the cold air aloft atop relatively warm SSTs generating a few hundred J/kg CAPE. Showers and longer spells of precipitation, wintry at times, will rotate around several small-scale areas of low pressure, in a very complex surface pattern - therefore the specific detail will be difficult to predict with more than a few hours lead time. In general, the greatest risk of lightning will be over seas and near coastal areas - with particular attention given to the Channel Islands on Monday morning, where a SLGT has been issued.