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.

A strange atmospheric pattern known as an "omega block" is preventing the usual eastward progression of weather across the U.S. — but what is this weird block, and when will it go away?

If we have the May Omega Block worked out of the weather pattern, we should be almost summer-like by the end of May. I can’t predict the exact weather on each day of Memorial Day weekend, ...

An "omega block" is expected to form from California eastward into the Ohio Valley, the National Weather Service Weather Prediction Center said on May 2. The blocking pattern is so named because ...

Your current weather may be around awhile.. 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 ...

An “omega block” weather pattern is forecast to set up across the country this weekend, possibly bringing some May snow. Here's what it will mean for you. The Weather Channel is forecasting a ...

An “omega block” weather pattern is forecast to set up across the country this weekend, possibly bringing some May snow. Here's what it will mean for you. The Weather Channel is forecasting a ...

What the Omega Block means for our weather pattern These areas of low pressure are your storm systems. Because this pattern is so amplified from north to south, it's more difficult to shift eastward.

A large, slow-moving omega block weather pattern is causing unusual weather across the U.S. This system is bringing cooler temperatures and rain to Arizona and the Southwest, while other areas ...

The omega block pattern will continue to lead to areas of both well below normal and well above normal temperatures this week, the Weather Prediction Center said.