What do the three solid horizontal lines below the weather forecast cloud mean?

To tell the truth, I have used almost all the weather software on the market. In fact, all roads lead to the same goal, all of which are data from the National Weather Service. Comparatively speaking, it depends on whose information is more comprehensive and updated more timely.

Generally, we will customize this weather sign ourselves. It should be rain, but the raindrops become horizontal lines.

I use "weather forecast" directly in the App Store, and one of the top five is Minesage. Advertising is less than ink. If a city is set, it will be updated on time every day. If the city has an early warning or the weather changes suddenly, it will be notified as soon as possible.

And the interface is simple and leisurely, which looks more comfortable.

I hope to adopt it. I did it myself. It's not easy to get back to work.