Twenty-five years ago to this date, Atmósfera joined the already established journals in the field of the atmospheric sciences and provided a new venue for the dissemination of results of research in that area.

We are very thankful to Dr. Graciela B. Raga and her coeditors for the preparation of this thematic issue, which initiates the celebration of Atmósfera's 25th anniversary.

The use of meteorological radars in hydrological modeling is a tool that is becoming more important each day throughout the world. In order to validate its use in hydrological modeling, a study was carried out in the sub-watershed of the…

The authors present the evaluative testing of a portable prototype of digital electronic barometer (UBII001). The prototype was developed in Venezuela although it includes low-cost multinational parts. The six year evaluation included response stability against atmospheric pressure variations. The UBII001…

For preparing medium range weather forecasts, two global coarse resolution models at different resolutions were used at the National Centre for Medium Range Weather Forecasting (NCMRWF), India. In order to improve the forecasting skill, an ensemble prediction system (EPS) was…

We present the results of a study of the dimming-brightening phenomena in the Wider Caribbean. The dataset consisted of time series of global radiation from 30 surface stations covering the period 1961-1990. The stations were distributed over the entire region:…

The Water Evaluation and Planning Model (WEAP) 2.1 was applied to the Sinú-Caribe river basin in Colombia to create several baseline and adaptation strategy scenarios for water supply, use and demand, and to make projections for the future including the…

For the first time, the features of the coastal water mass in winter season, spreading over the Veracruz reef system (VRS) have been investigated using hydrographic profiles. The study was performed in two separated surveys of two days of duration…

This work examines Mesoscale Convective Systems (MCS) observed during the North American Monsoon Experiment (NAME), using data of deployed instruments in Northwest Mexico like weather radar, atmospheric soundings and weather satellite. Satellite infrared images were used to define these meteorological…

Historical documents and newspapers from Mexican Pacific states (north of 14º N) were reviewed to determine the incidence of landfalling tropical cyclones from 1850 to 1949, prior to the start of the United States National Hurricane Center database. The reviewed…