Weather Sandbox plus: Setup Guide, Controls & Tips

Weather Sandbox is a browser-based 2D atmospheric simulation built around adjustable conditions, visual data layers, and direct user interaction. The “plus” search term is best understood as a request for extra guidance rather than a confirmed separate edition. This article therefore focuses on the available simulator setup, controls, displays, and practical techniques.

Start by opening the official 2D Weather Sandbox. The interface allows you to select a real-world sounding as the forcing for the simulation, then inspect the result through multiple display modes. A sounding gives the sandbox an atmospheric starting point, making it a better first step than immediately painting or modifying the scene.

The simulation is strongly dependent on graphics performance. The published guidance recommends a GTX 1070 or better for real-time operation, while laptops with dedicated graphics should be checked to ensure the browser is using the dedicated GPU rather than integrated graphics.

The control scheme combines mouse actions with keyboard shortcuts. Mouse input handles navigation and tool use, while the number keys and letter shortcuts expose displays, simulation options, and specialized tools.

The middle mouse button drags the simulation area. The mouse wheel zooms the view, or changes brush size while B is held. The left mouse button activates the selected tool. Holding Ctrl reverses the selected tool action, which is useful when correcting an earlier change.

Several controls are especially valuable during analysis. The C key shows relative humidity and cloud density, while K activates the air quality display. G opens or hides the sounding graph, and N controls weather station visibility. These layers help separate what the simulation is doing from what the scene looks like at a glance.

The QWERTYUIOP keys, along with the bracket and backslash keys, select tools. Because the tool mapping is broad, new users should test one tool at a time in a paused scene before making large changes.

A reliable session benefits from a repeatable sequence. The goal is to establish a stable view, inspect the atmosphere, and only then introduce local changes. This approach also makes it easier to compare experiments.

The most useful habit is to pause before inspecting. A moving simulation can make it difficult to tell whether a pattern is caused by the atmosphere, a recent tool action, or camera movement. Pausing gives you a stable reference for comparing displays.

Weather Sandbox includes more than atmospheric observation. It also supports a flight simulator mode, camera following, fire suppression, droplet tracking, and weather station placement. These systems are best explored after the basic controls feel familiar.

Press A to toggle Flight Simulator Mode. In this mode, the vertical mouse position controls the elevator. The up and down arrow keys control throttle, allowing you to manage the aircraft while observing the simulated environment. F toggles camera following the plane, Shift toggles landing gear, and the period key controls brakes. The slash key toggles the engine.

The aircraft can also interact with the environment. Press Z to drop water from the airplane to extinguish fires. This gives the flight mode a practical objective beyond movement, although careful camera and throttle control are still important.

A useful practice route is to begin with the engine and camera controls, then add altitude changes through the mouse. Once movement is predictable, introduce the water-drop function near a visible fire. If the camera becomes difficult to manage, use V to reset the view or F to change following behavior.

Weather stations provide another layer for experimentation. N shows or hides stations, while M adds or removes them. Droplet visibility and tracking use D and X, respectively. These tools are useful when you want to focus on a specific moving element instead of the entire simulation.

Performance tuning is part of the experience because the simulator calculates and displays a changing atmospheric scene. If the simulation becomes difficult to use, reduce the workload before changing your experimental idea.

Start by checking whether the browser is using the dedicated GPU. On a laptop, this single setting can make a noticeable difference. Next, consider resolution. Vertical resolution around 300 is the recommended baseline, while larger horizontal values can create stronger converging winds but may require more graphics performance.

The simulation speed can also be adjusted. End enables automatic iterations per second, PgUp increases iterations per second, and PgDn decreases them. These controls let you choose between faster progression and more time to inspect individual states.

A structured experiment should answer one question at a time. For example, you might compare two horizontal resolutions, observe the effect of a display layer, or test aircraft controls near a visible fire. Avoid changing multiple variables unless the purpose is specifically to study their combined effect.

For reference, the official project page is the best place to launch the simulator and review its current controls: 2D Weather Sandbox.