Ulewy

Ulewy are episodes of heavy, short-duration rainfall in Polish usage. They are characterized by intense precipitation over a relatively brief period, usually caused by convective storm activity and often affecting a limited geographic area. Ulewy commonly accompany thunderstorms and are associated with lightning, thunder, and gusty winds, though they may occur without noticeable electrical activity.

The meteorological mechanism involves rapid vertical development of warm, moist air that forms cumulonimbus clouds, generating high rain rates. Because the rainfall is localized, it can overwhelm urban drainage systems and cause flash floods on streets, in basements, and in low-lying areas. Farmers may experience temporary field flooding; roads can become hazardous and travel is disrupted.

In Poland and Central Europe, ulewy are more frequent in late spring and summer, when daytime heating is strongest. Climate variability and change are expected to influence their frequency and intensity, potentially increasing the risk of localized flooding in urban and rural areas.

In everyday language, ulewy are described as heavy downpours or rain showers of short duration. Weather forecasts and news reports commonly warn of ulewy, sometimes specifying accompanying hazards such as hail or strong winds.