The sweeping pattern that's now influencing much of the USA's weather is called an omega block because of its resemblance to ...

A strange atmospheric pattern known as an "omega block" is preventing the usual eastward progression of weather across the ...

The Omega Block sounds like a great name for a progressive heavy metal band. All that aside, it is a legit weather pattern.

A common upper-air pattern seems to be coming a few weeks early. It could be the sign this particular weather pattern will be ...

An "omega block" in the atmosphere will enhance the chances for stormy weather and big shifts in temperature over parts of ...

Omega block weather pattern is forecast this weekend to flip temperatures, bring snow, storms across the country. Here's what ...

An "Omega block" drawing chilly winds and fog from the North Sea threatens to cloak parts of Britain in a ghostly shroud of ...

A weather phenomenon has been impacting central and eastern Iowa today in the form of persistent cloud cover. This pattern is ...

The forecast has changed to bring rain this weekend. Why does it seem to keep raining here over the last few days? The ...

It is defined by a powerful high pressure area with an area of low pressure "underneath" or south of the high pressure.

The large-scale weather pattern that's now influencing much of the USA's weather – known as an omega block because of its resemblance to the Greek letter omega – isn't budging right now.