It's a first for me." Anne Wilkie posted on X. What she saw was a Kelvin-Helmholtz wave cloud, named after Hermann von Helmholtz, who discovered the atmospheric instability that leads to this ...

The pleasant rhythm of waves lapping at the lake shore is caused by wind blowing over the water at a faster speed than the ...

The current hot weather is expected to continue until the end of this month. Greater Jakarta should remain alert for ...

Severe flooding hit most areas in Jakarta and its satellite cities on Tuesday after heavy rain poured over the region, ...

This causes the cloud to take on the shape of rolling waves. Called Kelvin Helmholtz clouds, or just wave clouds, these clouds are a sign of turbulence in the air. The cloud’s name comes from ...

A woman in Calgary, Alberta, Canada, saw a strange, wavy cloud in the sky on Feb. 22, 2025, and took to X, formerly known as Twitter, to crowdsource an answer. "Does anyone know what is happening here ...