The US National Hurricane Centre said Bud was cantered about 350 miles (560 kilometres) south-southeast of Cabo San Lucas at the tip of the Baja peninsula and it was moving northwest at 7 mph (11 kph).
Hurricane Bud on Monday strengthened into a category three storm in the Pacific off the Mexican coast, but was still expected to remain well offshore, United States and Mexican meteorologists said.
The official National Hurricane Center forecast predicts Bud's maximum sustained winds will drop to 70 miles per hour by Wednesday night, which is below hurricane strength.
While the storm may strengthen on Monday, it will likely begin weakening on Tuesday, the centre said.
Infrared satellite imagery Tuesday shows the distinct 20 to 25 mile-wide eye, but also outer rainbands well removed from Bud near Puerto Vallarta, extending down the coast toward Manzanillo. But the official forecast from the hurricane center said that no tropical storms or hurricanes are forecast to develop in the next five days. It's now churning up waters more than 300 miles west of Puerto Vallarta and 400 miles south of Cabo San Lucas. The hurricane center warned that this could cause flash floods and mudslides.
Both the Atlantic Hurricane Season and Eastern Pacific Hurricane Season are underway.
"Bud is now a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale".
For the season as a whole, three to six tropical cyclones are predicted for the central Pacific hurricane basin, which includes tropical depressions, named storms and hurricanes.
At least some peripheral impacts are possible near the coast from future Bud, even if the center remains offshore.