New features in the CHMI Weather app: new meteogram, more accurate precipitation forecast and better user experience

One of the most significant changes is the update of the meteogram, an interactive graph showing the detailed development of the weather. It now allows a more accurate display of key elements such as temperature, precipitation, wind speed and gusts, air pressure and humidity. Precipitation data now matches that displayed in the location banner, eliminating the previous inconsistency and increasing the credibility of the information communicated. Another big change is the ability to directly click through from the home banner to the meteogram of a specific location - allowing the user to easily access the data they are actually interested in.

The graphical core of the meteogram itself has also undergone major technical changes. The temperature axis is now generated dynamically according to the minimum and maximum values of a given period, which has significantly improved readability. The axes have been redesigned overall for better graph proportions and their values are now clearly spaced so that they do not overlap each other. Weather icons are now displayed directly above the corresponding hourly interval, rather than between intervals, making their interpretation clearer. Other small but practical changes include the removal of visually distracting interactive elements and the addition of icons.

The other major new feature is the K-app, which refers to extensive editing of radar precipitation calculations at predefined time intervals. This functionality now provides a display of radar reflections with pixel accuracy, removing the previous 4-5 pixel variation. This means greater accuracy in the visualisation of precipitation fields, which will be particularly appreciated by users who use the application to plan activities according to current weather trends - such as farmers, outdoor workers or sports enthusiasts. In its final form, the K-app feature is a separate section in the app and has three parts: "1-hour rainfall", "Radar warning", "Extreme nearby".

In addition to these major changes, the update also brings dozens of minor tweaks and optimizations that improve the stability and intuitiveness of the app. For example, we've improved the behavior of the radar slider, reworked the forecast for the current day (precipitation for the whole day, wind as maximum value), and made navigation faster by directly clicking through to air quality, water status, or biometeorology maps from the side menu. These elements are now available from the app menu (for now in the Android version, they will be deployed on iOS in an upcoming release). Edits to the text help and tooltips have also been included, including a clearer air quality table.

From a user's perspective, these may seem like small things, but from a technical standpoint, these are carefully coordinated changes that move the app toward greater data accuracy and display flexibility. Our goal is not only to convey information, but also to ensure that users can trust and easily understand it.

Even after its launch, the CHMI Weather app remains a living project that is systematically evolving - in line with technological developments, the needs of professional partners and the expectations of the public.

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