Meteorologist Kim Castro explains what it is and why it's bringing several days of unsettled weather to Houston.

However, since Saturday, chilly, rainy, and cloudy conditions have been from just one weather system, a closed low. A closed low is a low pressure system that gets cut off from the jet stream.

What is a cutoff low, and how is it impacting our weather here in West Michigan? A cutoff low is a low pressure system in ... This is the current setup in the United States right now: There ...

Well, Omega Blocks occur when two low-pressure systems (one somewhere over the ... It all depends on where we are in relation to the blocking setup.