With these unstable pressure systems,

We're headed into a low pressure system.

- High-pressure system... - Go stand over there.

Every pressurized system needs a relief valve.

- High-pressure system... - Go stand over there.

The low-pressure system continues into the Sierras.

Look. Low-pressure system coming down from Alaska.

- High-pressure system... - No, no, no, no, Brick.

We have two massive low pressure systems moving south.

In Siberia, there's a Iow-pressure system never before seen.