Alert when Threshold broken for given amount of time

I would like to be able to setup an alert the will only trigger when a threshold has been broken for a given amount of time.

For example:

Physical Disk: Avg. Disk Queue Length

Threshold Critical: 5

Threshold Warning: 3

Trigger only if the warning or critical has been broken for 5min out of a 30min period.

So if it breaks for 2 min at a time i am not worried about it.

Another Example:

CPU Load

Threshold Critical: 95

Threshold Warning: 85

Trigger only if the warning or critical has been broken for 15min out of a 15min period.

Right now i would get an alert if the threshold is broke. I don't need to know if a CPU goes over 85% unless it has been there for 15+ min.

Is there a way to do this?

Im getting flooded with alerts and just trying to tone it down a bit.