Omega Block Brings Thunderstorm Threat, Heat, and Cool Conditions to US

The U.S. is about to experience a weather phenomenon known as an omega block, which will bring some unusual conditions across different regions.

California will face a threat of thunderstorms in June, while the Northwest and Northern Plains will experience hot temperatures.

On the other hand, certain parts of New England can expect relatively cool weather.

What is an Omega Block?

The omega block occurs due to two southward plunges of the jet stream: one near California associated with a low-pressure system, and another over the Northeast. Between these plunges, a ridge of high pressure forms, creating a northward bulge in the jet stream that extends from the Northern Plains and Northwest into Canada.