At least nine people have been killed by flash floods in Rio de Janeiro.

The mayor has declared a crisis after the Brazilian city was battered by heavy rain on Monday and Tuesday.

More than 31cm of rain (13 inches) fell in some parts of the city within 24 hours, the mayor’s office said.



According to Globo TV, 245mm of rain were recorded within just a few hours in Copa Cabana, while the April precipitation average does not exceed 95mm.


The satellite images from MODIS-TERRA below show the extremely low-speed movement of the cloud zone that affected the region. This slow movement was one of the most important reasons of this natural disaster.


On the maps below showing the condition on Sunday 7/4/2019 (2100 UTC). In the first map, the shallow low pressure system causes a precipitation zone, which is collocated with the cloud zone in the satellite. In the second map, the CAPE index is fairly enhanced causing eventually a quite unstable regime, ideal for the formation of storms.



Source: MSN

We faced a really warm 3-day period in the UK. High temperatures were recorded in SW England (up to 28.C) yesterday (Thursday 26/05/2017). High temperatures will be maintain today being followed by SE light-gentle breeze, offering a pleasant feeling. On the other side of Europe, in Greece, weather looks like autumn. Large amount of precipitation were recorded (up to 80mm during the last 24 hours) especially in North Greece, where temperature remains bellow 20s.
Here, we present a comparison between greek and british weather stations around lunchtime today (Friday 26/05/2017):

greek stations


Back to British Isles, this hot wave is coming to an end on Saturday. As it usually happens, weather is going to change from SW after midnight with storms. Some places present high risk of storms following by lightning strikes. As picture is worth a thousand words, we present two storm risk maps for tomorrow: