| Summary: | Cold fronts (CF) are the meteorological systems that affect a country in the dry season, which when combined with other meteorological conditions or local factors can generate precipitation that is sometimes greater than 100 mm in 24 h. Some studies have analyzed the synoptic patterns that are associated with the cold fronts that generate heavy rains in Cuba and the internal structure of these patterns. Similarly, from the 1990s, studies associated with the behavior of the North Atlantic Oscillation (NAO) teleconnection event within the winter period and the systems that are developed within it increased. However, the incidence of this event in the cold fronts that generated the intense rains in Cuba in the winter period of 1980–1981 to 2016–2017 has not been taken into account. For this, the tropospheric patterns that are associated with these winter systems were identified, the behavior of this event was characterized in those winter seasons with intense rains, and the mean field of temperature, humidity, and wind and its derivatives were associated with these meteorological systems when they generate intense rains and its relationship with said teleconnection event. The results that were obtained show that the NAO teleconnection event in the study period showed a preference to be negative. The temperature, the relative humidity, and the fields that were derived from the wind presented homogeneity in the two phases of this event.
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