The season's first tropical storm has weakened into a depression on Sunday.
Tropical Storm Arthur formed in the Gulf of Honduras, very near the coast of Belize and the Yucatan Peninsula of Mexico midday Saturday. It's top sustained winds reached 40 mph, or about the minimum threshold for a tropical storm.
Arthur is moving west-southwestward and will likely dissipate over the mountainous terrain of Mexico in the next few days.
Rainfall accumulations of 5 to 10 inches are anticipated over Belize, Guatemala, and the Yucatan Peninsula with isolated amounts as high as 15 inches. These rains could cause life-threatening flash floods and mud slides, especially in mountainous terrain. Many of the same areas were hit with heavy rains from Tropical Storm Alma in the Pacific Ocean this past week.
Arthur will not expected to directly impact the United States mainland.