These mean the weather system has moved in ... These are called Particularly Dangerous Situations, or PDS. This term is meant to grab attention. These are issued when the threat is long-lived ...

Check live radar | KOCO weather page | Get KOCO on the Go Sign up for our Newsletters A PDS tornado watch was issued for Monday's storms, but what does that mean? The National Weather Service ...

NOAA’s Storm Prediction Center has placed a Level 5 out of 5 risk for severe weather across a large part of the state, which means numerous ... is what’s called a PDS tornado watch.