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

Maine has been stuck with some very wet and cool weather. And it's all thanks to a pattern known as an omega block. An omega ...

The start of what is, on average, San Antonio’s wettest month of the year brought lackluster rainfall totals, despite a promising forecast last week. However, the next few days are shaping up to be ...