Here is what you need to know. The polar vortex is a large area of low pressure, cold air around the Earth's poles that blows westward during the winter and eastward during the summer. A polar ...

The massive outbreak of cold air is connected to the polar vortex ... a weak cold front that passed through Wednesday, a high-pressure ridge has developed near California, shielding the state ...

The polar vortex is a persistent area of low ... Well when we look at the graphic below, we see a ridge of high pressure bringing warm air northward. It's important to remember that the jetstream ...

The polar jet stream and the polar vortex Miles ... according to the post. A building ridge of high pressure over Alaska may have helped force the jet stream’s southward dive.

Hail that proved to be devastating to corn fields in Kansas. The extreme weather can all be attributed to a ridge of high pressure parked over the country. USDA meteorologist Brad Rippey says ...