Marine System Scaling

Disturbance: 10-39 Mph

Minor Marine System: 40-65 Mph

Strong Marine System: 66-80 Mph

Intense Marine System: 81-100 Mph

Extreme Marine System: 101+

What is a Marine System?

A Marine System is a strong low pressure system that is not tropical, nor extratropical. They must have winds 40 mph or greater, and must have a pressure of 990 Mb. They will form in areas 25 degrees north, anywhere lower will not tracked. The 990 Mb pressure must develop at least 100 miles from land. Any system that forms on land will not be tracked. If a marine system's pressure goes above 900 mb, or winds go below 40 mph, it is then classified as Post-Marine.