<p>The EUREC<sup>4</sup>A field campaign took place during January and February 2020, in the lower trades of the northern tropical Atlantic, over and in the seas windward of Barbados. &#160;The initial purpose of the&#160;campaign was to test hypothesized cloud responses underpinning large&#160;positive radiative feedbacks from the desiccation of marine shallow&#160;convection with warming. To do so EUREC<sup>4</sup>A built on a long-standing cooperation with the Caribbean Institute for Meteorology and Hydrology to collect long-term cloud observations. Its scope was subsequently expanded by the addition of many partners, with funding from a variety of additional EU and UK projects, and US participants through ATOMIC, to address many&#160;additional questions. These ranged from the role of fine-scale eddies and fronts on air-sea&#160;coupling, to the effects of meso-scale organization on cloud radiative&#160;effects, to the strength of aerosol cloud interactions, among others. Hundreds of scientists from nearly a dozen nations -- incorporating measurements from four large Research Vessels and five Research Aircraft, an advanced remote sensing ground station and a large&#160;number of autonomous vehicles in the air and sea -- combined their expertise&#160;&#160;to develop an unusually comprehensive picture of the processes relevant to the lower atmosphere and the upper ocean in the lower trades. We&#160;share our first impressions from EUREC<sup>4</sup>A, its surprises, and its prospects&#160;for answering some of the riddles that motivated this tremendous and coordinated effort.</p>