A method comprising: using a communication layer of a digital weather computing system comprising one or more processors and digital memory, receiving over a network at the digital weather computing system, first electronic digital data comprising a first plurality of values representing precipitation gauge measurements at a plurality of gauge locations; using digitally programmed precipitation intensity instructions in the digital weather computing system, obtaining a plurality of radar based precipitation estimates at the plurality of gauge locations; using digitally programmed error estimate computation instructions in the digital weather computing system, for each radar based precipitation estimate, identifying one or more corresponding precipitation gauge measurement values of the first plurality of values representing precipitation gauge measurements, and computing a radar based precipitation estimate error for the radar based precipitation estimate based, at least in part, on one or more corresponding precipitation gauge measurement values of the first plurality of values representing precipitation gauge measurements and a radar based precipitation estimate value of the radar based precipitation estimate; using digitally programmed error estimate computation instructions in the digital weather computing system, computing a precipitation estimate value dependence of the radar based precipitation estimate errors and storing the precipitation estimate value dependence in a precipitation error data repository; using digitally programmed precipitation intensity instructions in the digital weather computing system, obtaining a particular radar based precipitation estimate at a non-gauge location; using digitally programmed error estimate computation instructions, determining a particular precipitation estimate error for the particular radar based precipitation estimate based, at least in part, on the precipitation estimate value dependence of the radar based precipitation estimate errors; using a presentation layer of the digital weather computing system, displaying the particular radar based precipitation estimate and the radar based precipitation estimate error for the particular radar based precipitation estimate. using a communication layer of a digital weather computing system comprising one or more processors and digital memory, receiving over a network at the digital weather computing system, first electronic digital data comprising a first plurality of values representing precipitation gauge measurements at a plurality of gauge locations; using digitally programmed precipitation intensity instructions in the digital weather computing system, obtaining a plurality of radar based precipitation estimates at the plurality of gauge locations; using digitally programmed error estimate computation instructions in the digital weather computing system, for each radar based precipitation estimate, identifying one or more corresponding precipitation gauge measurement values of the first plurality of values representing precipitation gauge measurements, and computing a radar based precipitation estimate error for the radar based precipitation estimate based, at least in part, on one or more corresponding precipitation gauge measurement values of the first plurality of values representing precipitation gauge measurements and a radar based precipitation estimate value of the radar based precipitation estimate; using digitally programmed error estimate computation instructions in the digital weather computing system, computing a precipitation estimate value dependence of the radar based precipitation estimate errors and storing the precipitation estimate value dependence in a precipitation error data repository; using digitally programmed precipitation intensity instructions in the digital weather computing system, obtaining a particular radar based precipitation estimate at a non-gauge location; using digitally programmed error estimate computation instructions, determining a particular precipitation estimate error for the particular radar based precipitation estimate based, at least in part, on the precipitation estimate value dependence of the radar based precipitation estimate errors; using a presentation layer of the digital weather computing system, displaying the particular radar based precipitation estimate and the radar based precipitation estimate error for the particular radar based precipitation estimate.