What do the colors on the map overlay and scale mean?
The colors on the scale denote the precipitation intensity which is increasing from left to right. Originally the colors define the reflectivity of the radar signal and reach from about 5 dBZ to about 75 dBZ (depending on the source).
A gray overlay indicates that there is no radar coverage. A light gray means temporarily no coverage and dark gray means permanently no coverage.
The top arrow icon is the proximity, which indicates how close precipitation is to the current location. Proximity is the opposite of distance, that means that the closer the precipitation gets, the smaller the distance and the larger the proximity.
The middle drop icon is the intensity, which indicates how heavy the precipitation is.
The bottom cloud icon is the size or area, which indicates how large the affected area of the precipitation is.
The bar itself gets true blue if increasing, gets just a bit blue if nothing changed, and gets white/black (depending on the theme) if decreasing.
What do these Gadget icons mean and why aren't the 3 bars visible?
The first icon indicates there is no rain around which is shown instead of 3 empty bars.
The second icon denotes that there is no connectivity to the server at the moment.
Why is the app showing rain sometimes when it isn't raining?
This usually happens when the radar is reflected by something that is not precipitation, which is for example a common phenomenon for the US NWS data. The Rain Alarm server tries to filter such false precipitation but unfortunately not in all cases this succeeds completely. The team periodically tries to improve the filtering algorithm.
Why isn't the app showing anything sometimes although it is raining?
There are several reasons why this could happen. Most common is that the precipitation happens at an altitude that is not covered by the radar beam or the beam might simply be blocked by something. If you feel there is an error, please contact us.
