heat wave The low high pressure system over central Europe brought us a pleasant, warm summer day today. After the previous, mostly clear night, the day began with fairly cool temperatures north of the Alps, with lows of around. 10 degrees record in many places north of the Alps. This cooling even caus individual patches of fog, for example in. The lower Reuss valley, in Aargau along the Aare, and also in parts of Thurgau. Apart from that and a few remaining clouds in the south, it initially remain prominantly. Sunny with the formation of a few harmless cumulus clouds. In the afternoon, however, a spoilsport came along. Extensive and dense high clouds gradually mov in from the west, belonging to a low pressure. System over the nearby Atlantic. Despite increasing shading, 25 degrees were enough for a summer day in most places, and in the south. Due to the warmer air mass, even for a hot day with up to 30 degrees.
thunderstorm front on Monday evening
Animation of the thunderstorm line on Monday, July 15, 2024 from 15 to 24 UTC. Shown are the cloud cover (gray=low, white=mium, light blue=high) and the strength of the radar reflectivity (color areas with bolivia mobile database legend) calculat by the ICON-1E model.
Animation of the thunderstorm line on Monday, July 15, 2024 from 15 to 24 UTC. Shown are the cloud cover (gray=low, white=mium, light blue=high) and the strength of the radar reflectivity (color areas with legend) calculat by the ICON-1E model. (Source: MeteoSwiss)
How great is the potential for severe thunderstorms?
The severity of the thunderstorms, or in this case the line of thunderstorms, is assess by various parameters, among others.
As a reminder, here are the typical parameters for severe thunderstorms.
Forc lifting due to large-scale flow position (trough approach, jet position)
The approach of a trough causes large-scale uplift with an increase in cyclonicity (leftward curvature of the flow), which is enhanc by the position at the right entrance of a jet stream.
Situation on Monday, July 15, 2024, 18 UTC. Switzerland is why diffusion models are important in locat on the front of the trough and with the approach of a jet stream (yellow arrows), additional lifting of the air mass is betting email list generat at the right entrance (r circle). The color areas show the precing high cloud tops of the thunderstorm formations (calculat by the IFS model).
Situation on Monday, July 15, 2024, 18 UTC. Switzerland is on the front side of the trough and with the approach of a jet stream (yellow arrows), additional lifting of the air mass is generat at the right entrance (r circle).