There's drizzle, light rain, moderate rain, heavy rain, scattered showers, and mist -- all forms of precipitation that will leave you in various degrees of wetness.
And then there's the microburst, where if you're unfortunate to get caught in one of these, you might be wringing yourself out for hours.
A microburst is an incredible downdraft that spills forth from the belly of thunderstorms and spreads over less than 2.5 miles. (If it spreads farther than 2.5 miles, it's known as a "macroburst.")
For a microburst to develop, you need a powerful updraft, or wind flowing into a thunderstorm, that can hold back a large amount of air, rain and hail. As the air is pulled into the towering storm cools, it weakens the updraft. The updraft then becomes unable to support that large amount of air, rain and hail it once did, so all of that drops from the skies like an atmospheric water balloon.
When this "balloon" hits the ground and "pops," it sends strong wind racing out in all directions. According to the National Weather Service, wind speeds can reach upwards of 100 mph, and in extreme cases, winds can reach 150 mph. That equates to the winds created by EF-1 to EF-3 tornadoes, strong enough to knock over hundreds of trees and cause damage to homes or other structures.
Depending on the storm makeup, you can have a wet microburst or a dry microburst.
A wet microburst is when a lot of rainfall comes along for the ride. (Actually, "whole lot" is an understatement. Think of all the superlatives: "incredible," "amazing," "unfathomable," "eye-popping," "jaw-dropping"…).
Think of the rain and ice can be carried in tall thunderstorm clouds and then essentially wringing much of it out all at once. The result is much closer to a literal sense of an atmospheric water balloon: A massive wall of water drops from the sky, then races outward in all directions, carried by the strong winds.
Being inside a microburst is quite the surreal experience with sudden ferocious winds and a rain intensity that is among the heaviest you'll see -- almost as if you're being pelted with the drenching power of a million water balloons simultaneously. We talk of rain "showers" -- this is like being at the end of a hose.
A fire hose.
Don't bother with an umbrella. It'll be useless. With that kind of wind and rainfall potential, you'll want to seek shelter immediately.
Wet microbursts can lead to flash flooding with nearly instant rainfall totals that can approach an inch or more.
On the other hand, if the storm has a high cloud base and is in an area where there is a lot of dry air near the ground (like the Southwestern deserts), the rain can evaporate before it reaches the ground, and you can get what's known as a "dry microburst."
In this case, it's just the wind that races out in all directions, but as the name implies, it comes without precipitation.
Being caught in a dry microburst will leave you windblown and, if, in the desert areas, likely dust or sand-blasted, but at least your clothes have a decent chance of staying dry.
Either kind of microbursts is an extreme danger to aviation — especially during take-offs and landings — and why experienced pilots and air traffic controllers work to keep aircraft away from any storms that could potentially house a microburst. Some airports have wind sensors in place to help detect the presence of a microburst.