Tropical Storm Calvin Forms: Flood and Mudslide Threat in Mexico and Central America

Brian Donegan
Published: June 12, 2017

Tropical Storm Calvin has formed and is moving very slowly near the Pacific coast of Mexico, where heavy rain could cause life-threatening flash floods and mudslides early this week.

Here's the latest from the National Hurricane Center:

  • Tropical Storm Calvin is located about 70 miles east-southeast of Puerto Angel, Mexico.
  • Calvin will move inland along the coast of southern Mexico by early Tuesday.
  • Life-threatening flash floods and mudslides are possible in southeastern Mexico and southern Guatemala.
  • This system is no threat to the U.S. mainland.

(MORE: Hurricane Season OutlookHurricane Central)


Current Storm Status

Tropical Storm Calvin is expected to move slowly west-northwestward and push inland along the coast of southern Mexico by early Tuesday morning.

Little change in strength is expected until landfall, and weakening will occur after the storm's center moves inland.


Projected Path

Tropical storm warnings continue over parts of the southeastern Mexican coast from Boca de Pijijiapan to Punta Maldonado.

Tropical-storm-force winds – 39 mph or greater – have likely begun over portions of the warning area but should subside by early Tuesday morning.


Tropical Storm Watches/Warnings

Regardless of Calvin's strength, heavy rain is the main threat to Mexico and southern Guatemala.

Five to 10 inches of rainfall are forecast across the Mexican states of Chiapas, Oaxaca and Guerrero, with isolated amounts up to 20 inches possible. More than 6 inches have already fallen in Oaxaca and Salina Cruz in the Mexican state of Oaxaca.

Calvin is also expected to produce rainfall totals of 4 to 6 inches in the Mexican states of Tabasco and Veracruz, as well as in southern Guatemala. More than 5 inches have fallen in the city of Veracruz, as of late Monday afternoon.

These rainfall totals could lead to life-threatening flash floods and mudslides in some areas into midweek.


Rainfall Forecast Through Wednesday

Check back with us at weather.com for updates on this system.

MORE: Tropical Cyclone Mora Strikes Bangladesh


The Weather Company’s primary journalistic mission is to report on breaking weather news, the environment and the importance of science to our lives. This story does not necessarily represent the position of our parent company, IBM.

Featured Blogs

Meteorology of Saturday's Colombian Flood Disaster That Killed 254

By Dr. Jeff Masters
April 3, 2017

At least 254 people were killed in the in the city of Mocoa (population 40,000) in southwest Colombia near the border of Ecuador early Saturday, when torrential rains triggered a debris flow on a nearby mountain that surged into the town as a huge wall of water carrying tons of mud and debris. The disaster is the fourth deadliest weather-related disaster in Colombia’s recorded history.

Iconic American Destination Virtually Isolated for Rest of Year

By Christopher C. Burt
March 24, 2017

Half of the village of Big Sur, on the coast of central California, has lost its only access to the north following the demolition of the flood-damaged Pfeiffer Canyon Bridge along State Route 1 (also Rt. 1 or SR 1) on March 19. Although Rt. 1 to the south of Big Sur has reopened to traffic (after mud and rock slides were cleared) it is a long 70-mile journey along the windy but spectacular highway to Cambria, the next town of any significance where supplies can be had. CalTrans (California Department of Transportation) estimates it will take 6-9 months to rebuild a new bridge over the canyon.

An extraordinary meteorological event; was one of its results a 1000-year flood?

By Stu Ostro
October 5, 2015

The confluence of meteorological ingredients the first weekend in October 2015 resulted in an extraordinary weather event with severe impacts. Was one of them a 1000-year flood?

Why the Arrest of a Science-Loving 14-year-old Matters

By Shaun Tanner
September 16, 2015

By now, many of you have heard or read about the arrest of Ahmed Mohamed, a 14-year-old high school student from Irving, Texas. Ahmed was arrested because school officials called the police after he showed one of his teachers his homemade clock. Mistaken for a bomb, Ahmed was taken into custody, interrogated, shamed, suspended (still on suspension today, Wednesday), and reprimanded. All of this after it has been found that the "device" he brought to school was indeed, a homemade clock.