Tropical Storm Karina has formed of Mexico's Pacific coast, but forecasters said the storm is expected to move out to sea and weaken. The Miami-based National Hurricane Center (NHC) said the storm formed Tuesday about 800 kilometers west of the resort of Puerto Vallarta. Karina had winds of about 64 kilometers per hour (kph) and was expected to remain at that strength as it moves west-northwest, out to sea. The storm was expected to maintain a westward direction over the next few days before weakening into a tropical depression later in the week, the NHC said.
