Definition
Precipitation in the form of liquid water drops falling from convective (cumuliform) clouds, characterized by sudden onset, rapid changes in intensity, and short duration. Rain showers are distinguished from steady rain by their abrupt starting and stopping and by the broken or scattered nature of the clouds that produce them.
Plain English
Bursts of rain that come from puffy, vertically built-up clouds. They start quickly, often fall hard, and stop just as fast — unlike a steady rain that lasts for hours.
Context Anchor
Pilots encounter rain showers in weather briefings, forecasts, cockpit weather displays, and decisions about visibility, route choice, and whether conditions are changing too quickly for comfort.
Derivation
Rain comes from old English words meaning water falling from the sky. Shower originally meant a sudden fall or rush of something. That helps here because a rain shower is not just rain; it is rain that tends to arrive, vary, and end in a less steady way.
Why Pilots Care
Signals possible turbulence, gusty winds, or reduced visibility that may require delaying departure or altering route.
Grounding Statement
Picture flying toward a patch of darker sky where rain is falling in one area, while the sky a few miles away looks clearer.
Intuition Check
Do not read rain showers as just another way to say steady rain. In aviation weather, showers usually means rain that is scattered, changeable, and not spread evenly everywhere.
Example Sentence 1
The METAR reported scattered rain showers along the route, so the pilot planned for possible deviations around buildups.
Example Sentence 2
Isolated rain showers along the route caused brief visibility reductions but did not require a diversion.