(CNN) -- Tropical Storm Harvey weakened Saturday as it moved across northern Guatemala, while Tropical Storm Irene formed east of the Leeward Islands.
Harvey, which was expected to enter eastern Mexico on Sunday, had maximum sustained winds of 40 mph, according to the Miami-based National Hurricane Center.
As of Saturday night, Harvey was located about 40 miles north-northwest of Tikal, Guatemala.
It was heading west at 14 mph and continued weakening was predicted as the storm moved inland. Harvey could be downgraded to a tropical depression on Sunday and dissipate by Monday, forecasters said.
No tropical warnings or watches were in effect in connection with Harvey.
Still, the storm was predicted to dump 3 to 6 inches of rain across western Honduras, Guatemala, Belize and the Yucatan Peninsula in Mexico, with 10 inches possible in some places.
As of 6 p.m. ET, Irene was located about 190 miles east of the island of Dominica. It was forecast to pass through the Leeward Islands early Sunday and move into the northeastern Caribbean Sea later that day.
Some strengthening is predicted during the next 48 hours and Irene could become a hurricane on Monday, forecasters said.
Tropical storm warnings were in effect for Puerto Rico, the U.S. Virgin Islands and Dominica, among other places.
Irene was forecast to dump 4 to 7 inches of rain in the Leeward Islands, Puerto Rico and the U.S. Virgin Islands, with up to 10 inches possible in some places.