South America

Weather Underground Forecast for Friday, July 25, 2008.

Hurricane Dolly is expected to weaken as it moves over northern Mexico, and will likely lose its tropical characteristics Thursday night or early Friday. However, it will still produce heavy rainfall over Mexico near Monclova and the surrounding regions. Dolly is expected to produce eight to twelve inches of rain, with some areas receiving as much as 20 inches. Widespread flooding is expected due to the amount of rain. Elsewhere, Tropical Storm Genevieve, located south of Baja California, is expected to reach hurricane strength by Friday, but will move westward away from land. Meanwhile, moisture from Dolly will help to fuel widespread showers and thunderstorms over most of Mexico. A tropical wave is expected to move through Central America on Friday, and will trigger heavy rain and storms over most of the region. The Caribbean Islands will generally see nice weather throughout the day, but a tropical wave moving through the Caribbean Sea will produce a few scattered showers and storms over the islands.

The tropical wave in the Caribbean Sea will also move through Venezuela, bringing showers and storms to the northern part of South America on Friday. A cold front associated with a low pressure system located off of the southern tip of the continent will trigger heavy rain in southern Chile, along with parts of southern Argentina. Eastern Brazil can expect a few coastal showers, while most of the rest of the continent will remain mostly clear.