|Convective Outlook: Thu 04 Jan 2018|
|What do these risk levels mean?|
VALID 06:00 UTC Thu 04 Jan 2018 - 05:59 UTC Fri 05 Jan 2018
ISSUED 09:48 UTC Thu 04 Jan 2018br> br>
ISSUED BY: Dan
Several small-scale areas of low pressure will drift across the British Isles at times during this forecast period, providing the focus for organised areas of showers or longer spells of rain (and hill snow in the north). Lapse rates will steepen later in the day and overnight as an upper trough approaches from the Atlantic. A strongly-sheared environment over southern Britain associated with an area of showery precipitation and marginal instability this evening and tonight might allow some strong gusts of wind and sporadic lightning (though convective depth limited somewhat) - the risk also of an isolated tornado.