Tropical Storm Ileana (2018)  Tropical Storm Ileana was a small tropical cyclone that affected western Mexico in early August 2018, causing multiple deaths and flooding. The eleventh tropical cyclone and ninth named storm of the 2018 Pacific hurricane season, Ileana originated from a tropical wave that the National Hurricane Center began monitoring on July 26 as the wave left the west coast of Africa. The wave traveled across the Atlantic Ocean with no thunderstorm activity, before crossing into the Eastern Pacific Ocean early on August 4. Rapidly developing, the disturbance organized into a tropical depression on the evening of the same day. Initially, the depression was well-defined, but it soon degraded due to northerly wind shear. Despite the unfavorable conditions, the system began to strengthen on August 5, becoming Tropical Storm Ileana. A day later, on August 6, Ileana began to develop an eyewall structure as it reached its peak intensity with winds of 65 mph (100 km/h) and a pressure of 998 mbar (29.47 inHg). The storm gradually became intertwined with the nearby Hurricane John; over the next day, the circulation of John disrupted Ileana before ultimately absorbing it on August 7. Ileana prompted the issuance of multiple watches and warnings along the coast of Baja California Sur and western Mexico. The system paralleled the coast of Mexico for much of its existence. Ileana caused a total of eight deaths in Mexico; four people were killed in Guerrero and another four died in Chiapas. Flooding also ensued in the Mexican states of Oaxaca, Guerrero, and Mexico. The origins of Ileana can be traced back to a tropical wave that departed from the west coast of Africa on July 26. The wave had virtually no convection as it crossed over the Atlantic. Once the wave entered the Eastern Pacific Ocean early on August 4, thunderstorm and convective activity rapidly increased. The National Hurricane Center (NHC) first noted the potential for development on August 3. After satellite imagery indicated that an area of low pressure had formed a few hundred miles south of the Gulf of Tehuantepec and was showing signs of organization, the NHC raised the system's two-day development chances to 50% around 17:00 UTC on August 4. Only an hour later, at 18:00 UTC, the system was designated as a tropical depression while located about 230 mi (370 km) south-southeast of Puerto Angel, Mexico.