A blocking pattern will make for slow-moving weather. From a flood threat to upside down temperatures: here’s what we’re watching.

An Omega High is a blocking pattern combined of two cutoff lows with a high squeezed between them. The size of the pattern ...

This pattern disrupts typical west-to-east jet stream flow, causing stagnant weather conditions, including cool, showery weather in the East and West, and mild, clear conditions in the north-central U ...