was an early warning given before the hurricane struck?
Yes, the National Hurricane Center issued a Tropical Weather Outlook on September 19, anticipating that an area of low pressure would form in the Gulf of Tehuantepec over the weekend.
Hurricane Rosa (2018)
 The National Hurricane Center (NHC) issued a Tropical Weather Outlook on September 19, anticipating that an area of low pressure would form in the Gulf of Tehuantepec over the weekend.
where did hurricane rosa hit? Northwestern Mexico and the Southwestern United States when did it strike the first country? Late September 2018 and the second? Late September 2018 which part of the first country? The Pacific Coast of the Baja California Peninsula from Punta Abreojos to Cabo San Quintín. and the second? Southern California, Arizona, southwest Colorado, Utah, central Nevada, and a small portion of southeast Idaho. what was the damage? Flood damage from Rosa and its remnants totaled $50 million in the Southwestern United States and $530,000 in Baja California. was there loss of human life? Yes, a woman drowned in Caborca after being swept away by floodwaters do you know what category or level was it? Category4 what was the wind speed? 150 mph are hurricane's seasonal? Yes
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Hurricane Rosa (2018) [SEP] Meteorological history
Hurricane Rosa originated from a vigorous tropical wave that departed from the west coast of Africa on September 6. The wave traveled across the tropical Atlantic with minimal associated weather and became difficult to track after interacting with a mid-level trough in the Caribbean Sea. The National Hurricane Center (NHC) issued a Tropical Weather Outlook on September 19, anticipating that an area of low pressure would form in the Gulf of Tehuantepec over the weekend. The wave crossed Central America and entered the gulf on September 22, where it produced a surface circulation with convective activity aloft. Though broad in structure, the system consolidated as it proceeded slightly north of west.