This is expected to be an above average year for tropical weather, with the National Oceanic and Atmospheric Administration predicting 11 to 17 named storms, five to nine of which would become hurricanes, and two to four of which would become major hurricanes.
Tropical Storm Calvin is making landfall in southeastern Mexico.
The tropical cyclone will move inland along the coast of southern Mexico by early Tuesday. As showers and storms continue to impact the area, flooding will be a concern through Tuesday.
At 5 a.m. EDT (0900 UTC), the center of Tropical Depression Calvin was located near latitude 16.3 North, longitude 96.3 West.
"Regardless of the strength of this system, heavy rain will impact coastal regions of southern Mexico through the middle of the week", said AccuWeather Senior Meteorologist Matt Rinde.More news: Bill Maher apologizes on air: Racial slur 'has caused pain'
A tropical storm warning was in effect for Mexico's Pacific coast between Punta Maldonado and Boca de Pijijiapan.
Tropical-storm-force winds - 39 miles per hour or greater - are expected to first reach the coast within portions of the warning area on Monday.
Mexico's National Water Commission reported that the storm touched land in the early evening just east of the town of Ayutla, in Oaxaca state. From 5 to 10 inches of rainfall are forecast in the Mexican states of Chiapas, Oaxaca, Guerrero and Veracruz.
Additional weakening is forecast, and Calvin is expected to dissipate over the mountainous terrain of southern Mexico later today, June 13.