Tropical cyclone WILLA formed over the Eastern Pacific Ocean on 20 October and started moving north-north-west, off the coast of southern Mexico, strengthening. On 22 October at 3.00 UTC its centre was located approximately 385 km south-west of Puerto Vallarta (Jalisco State, Mexico) and 530 km south-west of Novillero town (Nayarit State, Mexico), with maximum sustained winds of 231 km/h (equivalent to Category 4 in the Saffir Simpson Scale).
Over the next 24 hours, it is forecast to move north toward the Bahía de Banderas (Nayarit and Jalisco States) and may reach the Islas Marias (Nayarit State) on 23 October as a Category 4 hurricane. It may continue to Nayarit and coastal areas of northern Jalisco States on 24 October as a Category 3 hurricane. Heavy rain, strong wind and storm surge could affect western Jalisco, western Nayarit and southern Sinaloa States (Mexico) on 23-24 October.
As of 22 October, a hurricane warning is in effect from San Blas (Nayarit State) to Mazatlan (Sinaloa State), including the Islas Marias.