|Convective Outlook: Sun 20 May 2018|
|What do these risk levels mean?|
VALID 06:00 UTC Sun 20 May 2018 - 05:59 UTC Mon 21 May 2018
ISSUED 15:56 UTC Sun 20 May 2018br> br>
ISSUED BY: Dan
A zone of slightly higher 850mb WBPT will drift westwards across SE England during the latter part of Sunday night and into Monday morning, along the northern edge of the main upper low situated over France. This may coincide with slight cooling aloft (particularly around 700mb) as a subtle shortwave drifts across the area, resulting in some elevated instability. Most model guidance remains dry, but there is a chance of a few high-based showers developing from elevated convection, with a low risk of some sporadic lightning. Confidence is rather low in this aspect.