Mesoscale Discussion
Valid: Tue 29 May 2018 14:00 to Tue 29 May 2018 20:00 UTC
Issued: Tue 29 May 2018 14:45
Forecaster: GROENEMEIJER

Netherlands, Northwest Germany, North Belgium...

Scattered convection is quickly expanding in coverage Within an area of surface wind convergence and low pressure, across which the ingredients for flash floods are in place. These include ample instability (1500 - 2500 J/kg CAPE), high precipitatable water content around or above 30 mm, and very slow storm motion. In addition to flash floods, isolated severe winds gusts and large hail with diameters of 2-4 cm are possible, before the storms will likely merge into larger clusters. Very heavy rainfall will likely remain a threat throughout the evening in some areas.