Current weather systems are impacting the Iberian Peninsula as a \u00a0trough\u00a0 sweeps across the region, leading to severe weather warnings from the State Meteorology Agency (\u00a0Aemet\u00a0). As experts have predicted, conditions are becoming precarious, with various alerts being issued\u2014including one concerning the risk of *Rissagas*, also known as “Meteotsunami.”<\/p>\n
Notice by <\/strong>Rissagas<\/strong><\/em>. <\/strong>In addition to warnings regarding heavy \u00a0rains\u00a0 and \u00a0storms\u00a0, Aemet has released coastal notices that will be in effect for several days, particularly in the \u00a0Mediterranean\u00a0 region, including \u00a0Catalonia\u00a0 and the \u00a0Balearic Islands\u00a0.<\/p>\n<\/div>\n Among these alerts, one stands particularly concerning for the island of \u00a0Menorca\u00a0, where sea level oscillations of up to 0.7 meters<\/a> are anticipated. This phenomenon, often referred to as *Rissagas* or “Meteotsunami,” exhibits similarities to seismic activity but is triggered by meteorological conditions.<\/p>\n *Rissagas*, or \u00a0meteotsunamis\u00a0, are characterized by sharp and sudden oscillations in sea level. According to Aemet’s previous explanations from \u00a0M\u00aa Jos\u00e9 Guerrero\u00a0, the then-territorial delegate in the Balearic Islands, these occurrences are typically confined to coves and ports that possess a specific \u00a0geometric\u00a0 configuration.<\/p>\n Much like traditional tsunamis, meteotsunamis can start with the sea receding, leaving small fishing and recreational boats marooned. In a matter of minutes, the waters rush back into the port with such intensity that they are capable of dragging vessels and overflowing \u00a0docks\u00a0.<\/p>\n On average, the scale of these oscillations measures around 50 centimeters; however, instances of several meters have been documented, amplifying their potential danger.<\/p>\n Meteotsunami<\/strong><\/em> differs substantively from a standard \u00a0tsunami\u00a0 in that its origins are meteorological, not seismic. Aemet outlines that these occurrences stem from small but rapid changes in \u00a0atmospheric pressure\u00a0 (ranging from 1-3 hectopascals), resulting from the movements of weather fronts, gravitational waves, and other convection-related phenomena.<\/p>\n First Red Notice from Aemet. <\/strong>Today’s forecasts indicate serious implications exceeding coastal risks. Aemet has warned of strong \u00a0showers\u00a0 and \u00a0storms\u00a0, which may reach particularly intense levels\u2014\u00a0locally very strong\u00a0. These adverse conditions are expected to affect sizeable regions of \u00a0Catalonia\u00a0, the \u00a0Pyrenees\u00a0, the northern parts of the \u00a0Valencian Community\u00a0, and the eastern regions of the \u00a0Iberian System\u00a0.<\/p>\n The agency has issued different alert categories across the center and northern Mediterranean coastline, including a \u00a0red notice\u00a0 (indicating extreme risk) for the central areas of \u00a0Barcelona\u00a0, where rainfall could accumulate to \u00a060 mm\u00a0 within the hour and potentially reach \u00a0120 mm\u00a0 over three to four hours.<\/p>\n In addition to the red warning indicating extreme risk, numerous orange notices (signifying important risk) will be in effect today and tomorrow. These pertain to the risks posed by rain and storms. Although conditions are expected to ease by \u00a0Friday\u00a0, isolated storm activity may continue throughout that day.<\/p>\n As Spain grapples with these environmental challenges, the interplay between heat and humidity indicates the need for preparedness among communities. The current weather events are a reminder of the volatility of nature and reinforce the importance of monitoring meteorological updates closely.<\/p>\n To stay informed, individuals are urged to follow Aemet announcements and prepare accordingly, especially those residing in affected coastal areas. As weather patterns continue to evolve, it is essential to remain vigilant and responsive.<\/p>\n Image credit: Menorchin<\/a> \/ Aemet<\/p>\nUnderstanding Rissagas: The Meteorological Tsunami<\/h2>\n
Aemet’s Alerts: Types and Impact<\/h2>\n
Impending Changes in Weather<\/h2>\n