27-10-2020 18:56 | ESSL/Estofex | m.b.t. 28-10-2020 t/m 29-10-2020
Valid: Wed 28 Oct 2020 06:00 to Thu 29 Oct 2020 06:00 UTC
Issued: Tue 27 Oct 2020 18:56
A level 1 was issued across parts of BENELUX and Germany mainly for severe wind gusts and tornadoes.
A level 2 was issued across southwestern Turkey mainly for large hail, excessive rainfall, severe wind gusts and tornadoes.
A level 1 was issued across southern Greece, the Aegean Sea and the southwestern Black Sea mainly for excessive rainfall.
An active weather pattern is forecast across western Europe underneath and to the north of zonal jet-streak. Embedded in the zonal flow, a short-wave trough is forecast to cross British Isles in the afternoon hours and reach BENELUX and western Germany during the night. Synoptic-scale lift, along with mid-tropospheric lapse rates exceeding 7 K/km will contribute to marginal CAPE and isolated to scattered thunderstorms.
More widespread storms are forecast within and ahead of a deep trough over the Mediterranean that will cross Greece during the day and progress further towards Turkey.
... BENELUX and Germany ...
A low-end threat of severe wind gusts and tornadoes will develop over the area in the overnight hours in conjunction with the approach of fast-moving short-wave. Forecast soundings reveal marginal latent instability with rather warm EL (=10 till -20 deg C). Isolated to scattered low-topped storms are forecast to develop and will likely attain nature of fast-moving line segments or supercells given 0-3 km bulk shear over 15 m/s. 850 hPa flow in between of 20 and 25 m/s suggests potential for isolated severe wind gusts in stronger downdrafts. Supercells will also bear a risk of tornadoes with low LCLs and 0-1 km bulk shear between 10 - 15 m/s.
(alleen de voor NL en aangrenzende gebieden relevante tekst overgenomen, klik hier voor de volledige forecast, red.)
Tags: Tornado/hoosverschijnsel(en) | Wind/storm (-schade)