A storm system brewing off the east coast of Mexico now has a 70% chance of forming into a tropical cyclone in the next 48 hours, the National Hurricane Center said on June 28, an increase from previous forecasts.

It developed in open waters west of the Azores and hundreds of miles east of Bermuda. It was only briefly strong enough to count as a tropical storm, but Andrea nonetheless entered the record books as the named storm to occur the farthest northeast during June.

An area of stormy weather in the open Atlantic Ocean became Tropical Storm Andrea on Tuesday morning, the first of the Atlantic hurricane season, according to the National Hurricane Center.