Another neat web app following the release of Forecast.io last month:

Forecast Lines shows you the forecast spread for each field (temperature, precipitation intensity, pressure, etc.), overlaid with our best guess of what will actually occur. It’s a simple idea, but a powerful one: at a glance, you can see what will happen over the course of the next week, and where we are most–and least–confident in our predictions.

Essentially, Lines looks like a consumer version of Forecast.io’s API raw data sources, which is also available here.

I’m a big fan of the Dark Sky team’s work with web apps and developer APIs for weather data. I can’t use the main Dark Sky app in Italy, but I am testing various third-party apps that are implementing Forecast.io and I’m impressed with their accuracy so far.

I like the idea of Lines’ statistically-aggregated graphs, and, unsurprisingly, the iOS web app is solid.