Tropical low pressure aimed for the southern Mexico coast will pose a threat of flooding rain Wednesday into Thursday.
The low was already showing signs of nearing tropical depression status as of Tuesday morning, and a named tropical storm could be the end result before expected landfall on Wednesday.
Regardless of status, the weather system will interact with southern Mexico mountains to drop 8 to perhaps 16 inches of rain within 48 hours. Flash flooding, river flooding and landslides will be the main threats to life and property.
The stretch of coast most likely to be crossed by the tropical low and its torrential rain is that between Salina Cruz and Puerto Angel in the southern state of Oaxaca. Within 10 to 20 miles inland, rain-grabbing mountains rear up, topping out between 8,000 and 12,000 feet along the crest of the Sierra Madre del Sur. It is these mountains that will be prone to flash flooding and landslides as they wring extreme rainfall out of the heavy tropical clouds.
Although the low will weaken and dissipate inland, forecast tools accessed by AccuWeather.com indicate that the weather throughout southern Mexico and nearby Central America will remain unsettled with further outbreaks of heavy rain through at least the start of next week.