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SAN DIEGO (KGTV) — Santa Ana winds have fueled the most destructive wildfires in San Diego’s history, including the Cedar Fire in 2003 and the Witch Creek Fire in 2007.But why do Santa Anas form and what makes them so effective at spreading fire?Typically, during the day, San Diego’s winds blow from the ocean to the shore. These onshore winds tend to carry a lot of water vapor.However, Santa Ana winds blow the opposite direction, from the east to the west, and they have all the ingredients fires need to spread.“Strong winds,” said National Weather Service San Diego meteorologist Philip Gonsalves. “They’re typically very dry, and we usually end up with warmer conditions.”Strong. Dry. Hot. A fourth key factor elevating the fire danger is the timing of this wind pattern.“They typically occur in the fall, which is that time of the year when the fuel moistures are very low, and so the fuels are primed for ignition,” Gonsalves said.Winds flow from areas of high pressure to areas of low pressure. Santa Anas form when there is high pressure over the Great Basin, located in Nevada and parts of Utah, and low pressure over Southern California.The winds are coming from the desert, but that’s not why they’re hot. They are hot for the same reason that air coming out of a bicycle pump is hot, Gonsalves said. It’s because the air is getting compressed.As the winds flow west out of the Great Basin, they travel over mountains. At high elevations, the air is very cool, but as the winds move downslope into lower elevations where the pressure is higher, the air gets compressed. That compression rapidly drives up the temperature in what’s called the Adiabatic Process.This process also dries out the air, and dry air can heat up much faster.As the winds move downslope, they pass over ridges and through canyons, which act like funnels, speeding up the winds.Santa Ana winds can pop up any time the Great Basin is cooler than Southern California, typically from September to May. But peak season is considered to be October.The Santa Ana event on Tuesday is falling a little before the peak season because of the positioning of highs and lows in the Northern Hemisphere, Gonsalves said, but the end result is the same: strong, dry, warm winds and extreme fire danger. 2281

SAN DIEGO (KGTV) - SeaWorld is seeing an unusually large number of sea lion rescues along the local coastline this winter."Most of those rescued are coming in emaciated and dehydrated," said Jennifer Zarate, SeaWorld Senior Animal Care Specialist.Zarate says since early December, SeaWorld has rescued 25 sea lions along the coastline."Definitely a little concerning," said Zarate.That is about three times the amount they normally see. Usually, rescue season begins in March, so these rescues are coming early. Those needing rescuing this winter are younger than normal, less than two years old. The cause is a mystery, but Zarate says those early winter storms could be playing a role. The big swells may be tiring the pups out, causing them to burn too many calories. The weather may also be impacting their food sources.."The winter storms may be pushing schools of fish out further than seal lion pups can get to. That's probably the reason why they might not find as much fish as they normally would," said Zarate. After being rescued by SeaWorld, the pups now doing well. So far, medical tests haven't turned up anything else unusual. The pups are gaining back weight as expected. Next week, the first three of those recently rescued will be released.SeaWorld says the coastline in Orange County has also seen an increase in sea lion rescues. SeaWorld says it will be prepared for a big rescue season if needed.If you see an animal in need of rescue, SeaWorld says keep your distance and call their rescue hotline at 1-800-541-SEAL. 1547

SAN DIEGO (KGTV) — Sick and tired over school shootings, a Point Loma High School junior is trying to make change through one of his passions.He participated in Public Service Announcement contest, a collaboration between San Diego Crime Stoppers and the San Diego Unified School District Police Department. Students were required to create a PSA about an issue schools deal with, like bullying or substance abuse.Tim Fraher's 40-second PSA addressed school shootings, raising awareness about the ways it's easier to get a gun than a driver's license. He also wants people to take notice if a friend or classmate is getting bullied or seems depressed.Fraher says he wants people to take school shootings seriously."We need to do something. We can't just sit around and pray that it will go away because it won't. We need to actually get out there and actively reform and make changes so that this won't happen," said Fraher.Fraher won the competition, and his PSA will air on television in the San Diego region this June. "It felt good to know that the message will get across, that it will be out there," said Fraher.He hopes the 40-second message will encourage others to take a chance at making a change. 1216

SAN DIEGO (KGTV) — Saturday's winning Powerball numbers are: 08, 12, 13, 19, 27 and the Powerball is 4.Saturday's Powerball drawing will be for an estimated 0 million, with a cash option of 8.6 million. While the Mega Millions craze has come and gone, Saturday's jackpot would still be the fourth largest in the history.Much like the Mega Millions prize, the Powerball jackpot has climbed since Aug. 11, after a winning ticket in Staten Island, New York, raked in 5.6 million. Since then, there have been 21 drawings without a jackpot winner.RELATED: No winner in Wednesday's Powerball drawing, jackpot increases to 0 millionThe odds of winning the Powerball jackpot are 1 in 292.2 million. Each ticket is .If you don't win the big prize, there's still a chance to win something. Matching the Powerball is worth at least and matching every number but the red Powerball is worth at least million. And maybe you will strike it rich. In San Diego, one ticket matched five of six numbers during this week's record-setting Mega Millions drawing, worth 2,472.Or if you have about 90 friends, pool together some cash and buy up a boatload of tickets, like these friends in Florida — though, it's safe to assume they lost more than they raked in. 1289

SAN DIEGO (KGTV) — SeaWorld's Tidal Twister roller coaster was open for roughly two weeks before an "operational issue" forced the ride to close.Friday, the park reopened the attraction to the public after repairs and has "passed inspection by the required agency," according to the park.In a statement to 10News, SeaWorld confirmed the ride passed inspection, adding, "The safety of our guests and team members is our top priority, and we are pleased to have resolved the issue in a short period of time."RELATED: SeaWorld unveils Tidal Twister thrill ride at San Diego parkThe ride had been shut down on June 1 over the mechanical issue, according to Cal/OSHA. Tidal Twister features duel track cars traveling at 30 mph around an infinite loop. The ride also features a research support aquarium that highlights sustainable aquaculture and coral reef protection.The ride comes on the heels of the wildly successful Electric Eel , which opened in May 2018. SeaWorld's next attraction is the Mako dive coaster, slated for a 2020 opening. 1045

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