Weather Tracker: Spain and Brazil Face Unseasonal Heatwaves This Week
Over the course of this week, temperatures in Spain are expected to soar significantly above the seasonal average, marking a notable weather anomaly. Daytime temperatures could reach approximately 30 degrees Celsius in Madrid on Tuesday, which is about 10 degrees Celsius above the norm for late April. Meanwhile, Seville may experience highs of 34 degrees Celsius, around 9 degrees Celsius above its typical late April average.
Atmospheric Conditions Driving the Heat
An area of low pressure situated out in the Atlantic Ocean will facilitate a south-westerly airflow, introducing warm air masses originating from north Africa. In addition to this intense heat, a significant dust plume is anticipated to travel northwards from the Sahara Desert. This dust is expected to cover the skies above Iberia and south-western France, potentially leading to strikingly orange or red hues at sunrise and sunset, creating dramatic atmospheric effects.
Brazil's Escalating Temperatures
In Brazil, high temperatures are forecast for several states, including São Paulo, Paraná, Mato Grosso do Sul, and Santa Catarina over the next few days. The heat is projected to eventually spread into Minas Gerais. Here, daytime maximum temperatures are expected to climb into the high 30s Celsius later in the week, representing an increase of about 5 to 10 degrees Celsius above the seasonal average, posing challenges for residents and infrastructure.
Severe Thunderstorms in Southern Africa
Conversely, Botswana and South Africa are expected to encounter some severe thunderstorms on Tuesday. In the heaviest downpours, rainfall rates could reach 20 to 30 millimeters per hour, bringing a substantial risk of localised flooding. Additionally, these storms may feature frequent lightning and hail, necessitating caution and preparedness in affected regions.
North America's Weather Shift
In North America, a recent cold plunge that brought snow to western parts of the United States will be replaced by exceptional mid-spring warmth this week. The core of this heat will likely be concentrated across north-western states such as Montana and Nebraska, as well as North and South Dakota, where temperatures could soar above 30 degrees Celsius. This represents an anomaly of about 15 degrees Celsius above the seasonal norm. The unusual warmth is forecast to spread eastwards, with parts of the midwest and north-east anticipated to experience very high temperatures by the end of the working week.
This global weather pattern highlights significant climatic variations, with heatwaves affecting Spain and Brazil while severe storms impact southern Africa, underscoring the dynamic and sometimes extreme nature of late spring weather systems.
