A Hurricane Hunter aircraft operated by the US National Oceanic and Atmospheric Administration (NOAA) flew into the storm on Tuesday and recorded sustained wind speeds near 180 mph (285 km/h), with stronger gusts. Polo peaked as a Category 5 storm—the highest level on the Saffir-Simpson scale—before weakening to a Category 4 on Wednesday morning.
The slow-moving hurricane is being fueled by extremely warm waters, which the National Hurricane Center attributed to the El Niño climate phenomenon. As it slowly drifts northwest, Polo is expected to drive intense wind and rain across parts of Mexico's southwestern coast, parallel to states including Michoacán, Colima and Jalisco.
'May produce life-threatening flooding and mudslides, especially in areas of steep terrain,' the forecaster said in its latest advisory. While the storm's projected track keeps it offshore, officials warned residents to remain alert as any shift could bring it closer to land.