During the afternoon a broad line of thunderstorms (squallline) came out of France and divided into two above Belgium. Near Dordrecht left and right of me the severe weather passed. Tens of miles east of me I saw the charactaristic updraft of a supercell. This thunderstorm brought lots of rain, lightning and hail. I tried to follow the storm; and ended via the A 15 near Nijmegen. Underway back to Rotterdam I passed a line of turbulent cumuli on the cold front.
The Estofex forecast:
"
With 0-6 km shear vectors around 25-30 m/s, 1-8 km vectors of 15-20 m/s, 0-1 km vectors of 12-17 m/s and veering winds with height yielding more than 200 m2/s2 0-3 km SREH (even over 400 m2/s2 along the warm front north of the instability), supercells are very likely and will have a good probability to produce tornadoes (lowest LCLs, strongest LL shear over Benelux), as well as large hail and severe gusts in the level 2 area."
