MWMDrys

MWMDrys is a fictional open-source software framework designed to study moisture dynamics in meteorology and hydrology through dry-run experiments. It sits within the Modular Weather Modeling (MWM) ecosystem and stands for Modular Weather Modeling Dry Run System. The project provides a modular engine to simulate soil moisture, evaporation, transpiration, and land-atmosphere feedbacks, enabling researchers and educators to prototype drought scenarios and evaluate dryness indicators in a repeatable workflow.

The architecture emphasizes modularity: a core time-stepping engine supports parallel execution; plugin interfaces exist for soil, vegetation, and atmospheric components; data I/O supports common scientific formats such as netCDF and Parquet; and Python bindings facilitate experimentation. A reproducibility toolkit records configuration, versioned inputs, and random seeds, ensuring traceable results. Visualization tooling generates soil moisture profiles and dryness indices.

MWMDrys originated as an illustrative project within the MWMD framework to demonstrate modular design principles for weather and hydrology models. It is described in academic and educational contexts as a didactic tool rather than a ready-to-deploy production model. Users are advised to perform validation against benchmark datasets and to contribute documentation and unit tests for reproducibility.

The project is openly accessible through a public repository under an open-source license and includes example datasets and tutorials. A small contributor community maintains the codebase, with ongoing plans to expand vegetation models, data assimilation options, and broader interoperability with other modeling systems.