SAN FRANCISCO (KRON) -- Hundreds of flights were delayed at San Francisco International Airport on Friday as a powerful storm slowed down the first big wave of holiday travelers. According to FlightAware, 350 flights were delayed Friday morning, and 50 more flights were cancelled. About 160,000 passengers are traveling through SFO on Friday, airport officials said. On Thursday, about 500 flights were delayed because of stormy weather at SFO. One woman flying from San Francisco to New Mexico told KRON4 that her flight's boarding time was delayed by four hours. Other travelers in the airport reported three-hour delays. Sunday will be the busiest day for Thanksgiving holiday travelers, with 164,000 passengers scheduled to fly in and out of SFO, airport spokesperson Doug Yakel said. Bay Area atmospheric river storm updates: Flood advisory issued for San Francisco "In total, 6.3 million travelers are expected at SFO between Thanksgiving and New Year’s Day, an estimated 15% increase over 2023 holiday travel levels," airport officials wrote. Fewer flight delays, 23, were reported at Oakland International Airport (OAK) Friday, according to FlightAware. Thirty-two flights were delayed at San Jose Mineta International Airport (SJC). San Jose airport officials said they expect bustling terminals and packed parking lots between Friday, November 22, and Monday, December 2, at SJC. Peak days include November 22, 26, 27, and December 1. On November 27, therapy animals will parade through terminals "spreading Thanksgiving joy and paw-sitivity for travelers," SJC officials wrote. An OAK spokesperson told KRON4 that between Nov. 22-Dec. 1, the Oakland airport expects 340,000 passengers will pass through its terminals. SFO has most holiday weather delays in US, study finds Travelers are strongly encouraged to arrive at the airport at least two hours prior to departure for domestic flights, and three hours prior to departure for international flights, the Transportation Security Administration said. On the ground, Bay Area drivers are navigating wet roadways and wind-triggered hazards. The National Weather Service Bay Area wrote, "An atmospheric river continues to inundate Northern California this morning. Rain chances will increase throughout the day ... as a cold front works its way across the Bay Area. Heavy rain may lead to the flooding of low lying areas and roadways, which may cause them to not be passable." Nationwide, AAA projects 79.9 million travelers will venture 50 miles or more from home over the Thanksgiving holiday travel period. This year’s projection is an increase of 1.7 million compared to last year, and 2 million more than in 2019. “Thanksgiving is the busiest holiday for travel, and this year we’re expecting to set new records across the board, from driving to flying and cruising,” said Stacey Barber, vice president of AAA Travel. “Americans reconnect with family and friends over Thanksgiving, and travel is a big part of that."