It had 45 miles per hour maximum sustained winds and was moving west at 6 miles per hour, the NHC's 11 a.m. EDT update said.
Aletta is centered just over 500 miles south-southwest of Mexico's Baja California Peninsula.
In 2017, the basin saw 18 named storms, 9 of which become hurricanes, with 4 classified as major storms (category 3 or higher).
The 2018 Eastern Pacific hurricane season has begun with a blast.
Forecasters believe Aletta will keep the worst conditions well offshore, which will limit the potential for any threats to land. Aletta strengthened into a Category 4 Hurricane Friday Morning, but has since weakened back to a Category 2.
Aletta becomes first hurricane of eastern Pacific season | Tri-City Herald
The Hurricane Center said the storm could generate swells that cause life-threatening surf and rip currents over the coming days. This disturbance is now a cluster of storms, but is becoming better organized. The National Hurricane Center is giving the tropical wave a good chance to develop into a tropical depression this weekend south of the Mexican Riveria.
The season of Hurricane has just started in the Atlantic and the eastern Pacific Ocean, and it will be running through November 30th, 2018.
Jonathan Erdman is a senior meteorologist at weather.com and has been an incurable weather geek since a tornado narrowly missed his childhood home in Wisconsin at age 7.
With strengthening, Bud is expected to become a hurricane late Sunday or early Monday.
Trump withdraws endorsement of G7 joint statement, slams 'weak' Trudeau
Trump announced worldwide tariffs on steel and aluminum imports in March, with an an exemption for some trading partners. But that comes at odds with Prime Minister Justin Trudeau's comments last week.