Released: February 13, 2026 | Size: ~134 MB | Windows 64-bit

• Bug fixes and improvements
• Faster Genetic Algorithm performance
• New junction-finder algorithm for improved Subcatchment delineation
• Plotting support for gridded precipitation time series
• Improved Particle Tracing algorithm

🌊 Cross-Section & 1D Enhancements

• New planar and non-planar automatic cross-section extraction algorithm that prevents self-intersection
• Right and left overbank definition during cross-section extraction
• Extracting streamlines from cross sections
• Line intersection point detection
• Major improvements in 1D methods and cross-section management
• Added 1D SKM velocity and 2D SKM velocity outputs
• New 1D solvers added to Real-Time Flood Mapper (Gradually Varied Flow & Energy Equation)
• Channel/Dike Designer now supports using 1D cross sections directly for channel and dike design

🧭 GIS & STEGIS Improvements

• Compressed raster outputs in STEGIS to reduce file size while preserving read/write speed
• New methods added to Elevation Harmonizer
• Ability to manage stored data directly in shapefile attribute tables
• Polyline-to-Polygon conversion tool

⚙️ Simulation & Diagnostics

• Pause / Resume capability in the 2D Simulator
• Expanded 2D Post-Processor outputs (Froude number, Courant condition, etc.)
• Introduction of Hydraulic Diagnostics tools
• New Cross-Section Analysis features in Cross-Section Analyzer tool

Released: December 12, 2025 | Size: ~134 MB | Windows 64-bit

• Bug fixes and improvements
• Overall Software Optimization and Compression
• Storm Designer Module : A powerful new module that transforms historical or regional precipitation information into actionable flood-modeling inputs. It automatically generates design storm hyetographs based on IDF curves for any return period and duration.
• Hydrograph Designer Tool : A new tool for creating synthetic flood hydrographs, allowing users to specify a peak discharge and base flow to form customizable inflow hydrographs.
• Rainfall Spatializer : A novel tool that creates gridded precipitation rasters from multiple rainfall gauges using smart spatial interpolation techniques tailored for hydrology.
• Temporal Parser Tool : A flexible utility for converting and transforming DateTime formats, TimeSpan values, and temporal datasets. It prepares critical time-based data for use in sensitive engineering and modeling software, such as HEC-RAS.
• Vector Translation Tool : A new tool that converts geographic data between formats like SHP, GML, and KML. It enables seamless interoperability for GIS workflows and mapping applications.
• Multi-Raster Band Creator : A new tool for assembling multiple raster layers into a multi-band raster, useful for machine learning, remote sensing, and modeling workflows.
• Refined Shapefile Add/Edit Mechanism : The shapefile editing workflow has been redesigned for more precision and smoother interaction when creating or modifying vector data.
• Improved 2D Simulator : Enhancements to computational performance, stability, and numerical consistency improve overall simulation quality and speed.
• New Tile Servers Added : Additional tile providers have been integrated, giving users more basemap options for terrain analysis and visualization.

Released: November 13, 2025 | Size: ~162 MB | Windows 64-bit

• Bug fixes and improvements

🌍 STEGIS Updates:

• RiverFlow Analyzer Tool: A brand-new RiverFlow Analyzer tool has been added, designed to evaluate flow behavior and hydraulic characteristics along river channels efficiently.
• Road Closure Analysis Dashboard: A link to Road Closure Analysis Dashboard has been added, based on research by Maghsoodifar et al. (2025), Coastal Hydrology Lab, The University of Alabama. This dashboard helps assess potential road closures during flood events, providing valuable insight for flood management and planning.
• 2D Simulation Setup Enhancement: Boundary cells for 2D simulation areas are now highlighted visually during setup, making it easier to verify model boundaries before running simulations.
• Streamline Extractor Update: A new extraction method — Main Stream — has been added to the Streamline Extractor tool, enabling more accurate identification and extraction of primary flow paths.
• Smooth Poly Added: A new Smooth Poly tool has been introduced, allowing users to make their polylines and polygons smoother, more natural shapes for hydrologic and terrain analyses.

🌍 STEGeo3D Updates:

• Performance Improvements: STEGeo3D now runs smoother with enhanced rendering performance for large terrains.
• New Camera Mode – Drone: A Drone Mode has been added to the camera system, allowing users to explore their terrain and simulation results from a dynamic, aerial perspective.

Released: October 22, 2025 | Size: ~160 MB | Windows 64-bit

• Bug fixes and improvements
• STE Downloader: a built-in tool that automatically downloads and installs the latest version of STE — making updates easier, faster, and fully automated.
• Return Period Analyzer: A powerful new flood frequency analysis tool has been added to STEGIS. The Return Period Analyzer can compute the return period of flow discharge, precipitation, water surface elevation, and more using methods such as Gumbel, Log-Pearson Type III, and GEV L-Moments.
• Raster Calculator: A fast, independent, and reliable Raster Calculator has been added to STEGIS. Users can now create new rasters or perform mathematical operations between rasters using custom equations
• Elevation Harmonizer: The synchronization feature from the Merge Rasters tool has evolved into a standalone, intelligent tool. The Elevation Harmonizer automatically adjusts DEM elevations to ensure seamless transitions at synchronization points.
• Real-Time Watershed Delineator Enhancements: New options have been added to the Real-Time Watershed Delineator, making it faster, more accurate, and highly customizable for diverse hydrologic analyses.
• Stage–Area–Volume Relation Extractor Enhancement: Selecting elevations in the Stage–Area–Volume Relation table now displays the corresponding water extent on the map in real time

Released: September 30, 2025 | Size: ~159 MB | Windows 64-bit

🌍 STEGIS Updates:

• Real-Time Catchment Delineator Upgrade: The tool is now extremely faster and smoother, with new visualization options for an improved interactive experience.
• New Delineation Methods: Users can now choose between single-directional and multi-directional flow methods for catchment delineation.
• Catchment & Subcatchment Delineation Enhancements: The delineation algorithm has been significantly improved for higher accuracy and smoother results

🧠 STELAB Updates

• Parallel Processing for ANN & Regression: Training Artificial Neural Networks and fitting regression lines now leverage parallel processing, making computations much faster.
• Output Rounding Option: ANN and regression model outputs can now be rounded, improving their usability in classification problems.
• Support for Categorized & Labeled Data: STELAB now fully supports categorized and labeled input/output data in ML models.
• StringMapper Tool: Users can map corresponding digit values to categorized and labeled data, simplifying model preparation.
• Automatic Digit Assignment: An algorithm has been added to automatically calculate unique digit values for categorized and labeled data.

Released: September 21, 2025 | Size: ~159 MB | Windows 64-bit

• Bug fixes and improvements
• Non-Newtonian Rheology (Mud & Debris Modeling): STE’s 2D Simulator now supports Bingham rheology for Non-Newtonian flow modeling, enabling mudflow and debris-flow simulations. The 2D Sediment Module (Movable Bed) is fully integrated with Non-Newtonian modeling. Future updates will add more rheology types and enhanced accuracy for finer sediment particles.
• Built-in Help Access: A help icon and buttons have been added to forms with existing documentation. Pressing F1 now opens the relevant documentation page, streamlining the learning process.
• Optimized Server Connectivity: Connection to STE servers has been optimized for more reliable and responsive performance.
• UI and Code Optimization: User interface responsiveness has been improved, and underlying code has been optimized for a smoother overall experience.
• No Administrator Privileges Needed for STE TileServer: Map tiles are now displayed without requiring administrator rights, making installation and usage smoother for all users.

Released: September 4, 2025 | Size: ~159 MB | Windows 64-bit

• Bug fixes and improvements
• Terrain Texture Downloader is Back!: The Terrain Texture Downloader tool has been reintroduced, allowing users to easily fetch and apply high-quality terrain textures for enhanced 3D visualization.
• STEGeo3D Water Surface Textures: STEGeo3D now supports textured water surfaces. Users can overlay Flow Velocity, Flow Depth, Flow Discharge, and Total Sediment Load maps directly onto the water surface for an immersive 3D analysis experience.
• Rain Statistics GEE Script Writer: A new tool that automatically writes Google Earth Engine (GEE) scripts to derive rainfall statistics over a chosen AOI using multiple datasets.
• Precipitation GEE Script Writer: A dedicated tool for writing GEE scripts to download gridded precipitation rasters from datasets such as IMERG v07 and ERA5-Land.
• Optimized Precipitation Extraction: The process of extracting gridded precipitation rasters from NetCDF and GeoTIFF bands has been significantly optimized for faster and more reliable performance.
• Semi-Implicit Lost Volume Controller: A new semi-implicit algorithm has been added to improve numerical stability and accuracy in flood simulations involving lost volume computations.

Released: August 16, 2025 | Size: ~158 MB | Windows 64-bit

• Bug fixes and improvements
• Real-Time Flood Inundation Mapper: A new tool for real-time flood modeling has been added, enabling users to map inundated flood zones instantly with high computational efficiency.
• 2D Solver Performance: The 2D solver is now faster due to extensive code optimizations, enabling quicker simulation runtime.
• Generate Contours Tool: A new tool has been added, allowing users to generate contour lines from terrain or simulation data with precision and ease.
• Recover Account (Forgot Password): A new feature has been added, allowing users to securely recover their account credentials if they forget their password.
• Extent Management: Users can now save extents and quickly navigate between them, improving workflow efficiency and ease of use.
• UI Stability Improvement: Fixed crashes that occurred when the application experienced poor or unstable internet connections.
• Server Connectivity: Fixed several server connection issues, improving stability and reliability during online operations.

Released: July 28, 2025 | Size: ~174 MB | Windows 64-bit

• Bug fixes and improvements
• 1D Cross Section Manager: A new 1D Cross Section Manager has been added, enabling users to organize, edit, and manage 1D hydraulic cross sections more efficiently.
• Simple Cross Section Extractor: Users can now extract 1D cross sections along a selected stream line with just a few clicks, simplifying terrain-based model setup.
• 1D Grid Forger: A new tool has been added to forge rasters using 1D values defined on cross sections and interpolation.
• Channel Dike Designer Update: The Channel Dike Designer tool has been updated for improved user interaction and better integration with terrain editing workflows.
• New Tile Providers: Additional online map tile providers have been integrated into STEGIS, offering more basemap variety for better context and visualization.
• Custom Tile Providers: Users can now manually add up to 3 custom tile providers to tailor the map view to their specific needs or organization’s data sources.

Released: July 14, 2025 | Size: ~188 MB | Windows 64-bit     (Public Release)

• Bug fixes and improvements
• Sediment Module Improvements : Significant code optimizations have been implemented in the Sediment Module. As a result, 2D movable bed simulations now run much faster than before, greatly improving performance and efficiency.
• Added support for Implicit Diffusion Wave Solver. Currently, it handles only internal boundary conditions. Full functionality will be available in an upcoming update.
• Development of the 1D Computation Module for STEGIS has begun in this version. This marks the first step toward integrated 1D hydrologic and hydraulic analysis within STEGIS.

Released: July 01, 2025 | Size: ~188 MB | Windows 64-bit     (Early access for subscribers)

• Bug fixes and improvements
• Added a new sediment transport configuration allowing transport rates per size fraction (sediment class) to be calculated with distinct formula sets.
• Revamped sediment module: faster simulations and improved flexibility for complex flow scenarios.
• Sediment concentration output now available in postprocessor results
• Added a new "Engrave on Raster" tool that allows users to write text or embed images directly onto raster layers.

Released: June 18, 2025   |   Size: ~188 MB   |   Windows 64-bit

• Bug fixes and improvements
• Plot time-series tool now exports flow discharge accumulations and total sediment load accumulations.
• Implemented a maximum Froude number limit to reduce volume loss and improve the accuracy of simulation results.
• Added a new implicit volume loss controller to the simulator to improve stability and accuracy in challenging scenarios.
• New CPU optimization controls: toggle single/multi-core mode and set max parallel threads.

Released: June 12, 2025   |   Size: ~178 MB   |   Windows 64-bit

• Bug fixes and improvements
• Added a computational cost estimator to the simulator to inform users about the expected intensity and resource demand of their simulations.
• Added a Bing Map Downloader tool for retrieving high-resolution map imagery, and updated STEGeo3D to support textured surfaces for enhanced 3D visualization.
• Added tools for converting shapefiles and rasters into Manning’s n regions, streamlining the setup of spatially variable roughness.
• Added a real-time watershed delineator to help users quickly analyze and understand new study areas with minimal setup.