Add Yahoo as a preferred source to see more of our stories on Google. Scattered showers are expected Wednesday in Napa County, amid an unusual global weather pattern. (Brant Ward/The Chronicle) The ...

The omega block is a weather term that describes the shape of the jet stream in the northern hemisphere: a curved upside-down "U" with two outward facing lines, which appears to resemble the 24th ...

While it's been cool and wet in the Miami Valley, there's a much different set up out west. A stubborn jet stream pattern has made its mark on the entire country recently. While we find ourselves in a ...

OKLAHOMA CITY (KFOR) — Here’s a look at the Jet Stream pattern as we go into this weekend. A storm trough is developing and moving east into the southern plains with waves of thunderstorms in the ...

In order to break down the severe weather across the Midwest, we have to talk about the atmospheric conditions that were in place across the Lower 48 for much of March. For pretty much the whole month ...

Lately, the jet stream isn’t playing by the rules. Scientists say that big river of air high above Earth that dictates much of the weather for the Northern Hemisphere has been unusually erratic the ...

We are dealing with a double structure Jet Stream pattern with a southern branch but the northern branch is dominate. This means the cool and mostly dry weather pattern continues into the weekend. By ...

Storms will remain a part of the forecast most days this week as they come into our area from the High Plains ...

The world's weather is in a strange pattern right now - and it's affecting California. A massive area of high pressure parked over Western Europe, responsible for breaking century-old records and ...