After reaching the status of a hurricane from a tropical storm on September 17, Polo has been encountering a bit of wind shear since then. According to Skymet Meteorology Division in India, Polo will continue to weaken further, as it is in an area of increased wind shear and is moving into a drier air mass.
Polo will also be moving over cooler waters, which is caused by upwelling from Odile. Upwelling is a process where the water at the surface moves away from the center of the hurricane and cold water from below the surface is drawn upwards to fill the void. Polo was formed on Tuesday, several hundred miles south-southeast of Acapulco, Mexico. It became the season's eleventh hurricane on Wednesday.
At present, Polo has again moved back to tropical storm status and is moving towards the northwest. The center of Polo's circulation will remain offshore but rain bands may affect the southern Baja California peninsula, producing gusty winds and heavy rain. Tropical storm force winds will extend outward up to 80 miles from the center of Polo's circulation. Hurricane Polo is likely to induce rainfall amounts of 30 mm to 50 mm, with isolated amounts of 100 mm to 150 mm over extreme southern Baja. Such additional heavy rainfall could result in life-threatening flash floods and mud slides.
