More recently, December became one of the deadliest months of 2015, after a low pressure weather system moved across the central U.S., killing at least 50 people — the most casualties caused by any weather - related event that year. (psmag.com)
If there is a high pressure weather system stalling over Greenland, a deep freeze could settle over the States for a week or more. (hubpages.com)
You'll never forget high and low - pressure weather systems after you've danced them. (unitedarts.org)