What phenomenon says it will rain tomorrow?

Weather forecast method-On rainy days, if the air pressure rises, the humidity decreases and insects fly high, spiders will open their nets to catch them, indicating that the weather will clear up. On the contrary, the spider closes its net, which indicates that it will rain. As the saying goes, "spiders weave webs, and after the rain, it clears up."

2. Frogs

Weather forecast method-in spring and summer, frogs cry loudly and intensively, which indicates that it will rain soon. The proverb says, "When a toad shouts, it must be raining heavily".

3.swallow

Weather forecast method-when the weather turns bad and it's going to rain, the air humidity increases, and the wings of insects become soft, with small drops of water, and they can't fly high. Swallows fly low to catch insects.

4. "The river pig crossed the river and it rained cats and dogs": The river pig refers to the broken rain clouds in nimbostratus. The appearance of this cloud indicates that there is enough water vapor in nimbostratus, and a rainstorm is coming. Sometimes broken rain clouds are blown to cloudless places by strong winds, and it is also a precursor to rain to see clouds like pigs floating across the Milky Way at night.

5. "Gray cloth hangs in the sky, and the rain will continue": The gray cloth cloud refers to nimbostratus, which is mostly formed by thickening and metamorphosing high-level clouds, with a large and thick range and sufficient water vapor in the clouds, which often produces continuous precipitation.