Less than 24 hours after being dubbed a hurricane, Tropical Storm Barbara has weakened. At the same time, the National Hurricane Center continues to track Tropical Storm Cosme and another area of low pressure that could develop into a system.

Cosme was a tropical storm in the North Pacific Ocean Monday afternoon Mountain time, the National Hurricane Center said in its latest advisory. The tropical storm had sustained wind speeds of 70 miles per hour.

In focus: Storms that stall or move at a snail's pace near the coastline pile up water and prolong the coastal flooding potential. In addition, large battering waves over a longer period can worsen damage to the coastline, including severe beach erosion. This is because the winds blow onshore for a longer period.