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NASA’s Atmospheric Waves Experiment Detects Gravity Waves Triggered by Hurricane Helene Over Florida

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On September 26, 2024, as Hurricane Helene unleashed its fury on Florida’s Gulf Coast, NASA’s Atmospheric Waves Experiment (AWE) aboard the International Space Station (ISS) captured a remarkable atmospheric phenomenon. The storm, which produced intense storm surges and affected communities along the coast, created gravity waves high above the Earth’s surface, approximately 55 miles in altitude. These waves, a rare sight from space, were detected as part of NASA’s ongoing research into space weather and its interactions with Earth-bound systems such as satellites, communication networks, and other technological infrastructure.

The AWE instrument, which was launched in November 2023, is designed to observe the impact of terrestrial weather events on the upper atmosphere. As the ISS passed over the southeastern United States during the height of Hurricane Helene, the AWE detected large, concentric gravity waves caused by the extreme conditions below. The waves, which are visually represented in red, yellow, and blue hues, illustrate changes in radiance within Earth’s mesosphere, offering a striking depiction of how violent weather events can send shockwaves into the higher layers of the atmosphere. The color enhancements in the imagery highlight variations in infrared brightness, helping to track the waves as they stretched westward from northern Florida.

Gravity waves, which are essentially ripples in the atmosphere caused by disturbances such as strong winds or storms, have a significant role in both weather and space weather dynamics. According to Ludger Scherliess, the Principal Investigator for NASA’s AWE at Utah State University, these waves are similar to the ripples that form when a pebble is dropped into a pond. By studying these atmospheric disturbances, scientists can gain a deeper understanding of how terrestrial weather phenomena, like hurricanes, influence the broader atmospheric system, including conditions that can affect satellite operations and communication systems in space.

This discovery underscores the critical role of atmospheric studies in understanding the intricate relationship between weather on Earth and space weather. The data collected by NASA’s AWE could potentially provide valuable information for improving the resilience of space-based technology during extreme weather events, highlighting the interconnectedness of our planet’s weather systems and the technology that relies on them. As scientists continue to monitor these gravity waves, it could open new pathways for protecting both terrestrial and space-based infrastructure from the effects of powerful storms like Hurricane Helene.

Floridians Rush to Evacuate as Category 5 Hurricane Milton Approaches

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Floridians are scrambling to escape the Gulf Coast as Hurricane Milton, a Category 5 storm, barrels towards the state, threatening catastrophic damage. More than one million people in coastal areas have been ordered to evacuate, with residents clogging highways and gas stations running dry as the storm’s landfall approaches late Wednesday night or early Thursday morning. The storm is targeting the Tampa Bay region, home to over 3 million people, but forecasters caution that its path could shift slightly.

Hurricane Milton, with maximum sustained winds of 160 mph (260 kph), is one of the most powerful storms ever to threaten the Gulf Coast. The National Hurricane Center warned of a deadly storm surge of over 10 feet along much of the coast, posing grave risks to the region already battered by Hurricane Helene less than two weeks ago.

Officials, including President Joe Biden and Tampa Mayor Jane Castor, have urged residents in evacuation zones to flee immediately. Michael Tylenda, visiting his son in Tampa, echoed their concern. “When you don’t evacuate when you’re ordered to, you can pretty much die,” Tylenda said, recalling the deadly aftermath of past hurricanes. “The house can be replaced. The stuff can be replaced. So it’s just better to get out of town.”

Milton has intensified rapidly, becoming the third-fastest storm to grow from a Category 1 to a Category 5 in the Atlantic within 24 hours. Climate experts, like Daniel Gilford of Climate Central, attribute the rapid intensification to unusually warm sea temperatures fueled by climate change, warning that storms like Milton could become more frequent and destructive in the future.

At 10 p.m. CDT, the storm’s eye was located 405 miles southwest of Tampa, moving northeast at 12 mph. While Milton’s winds may weaken as it approaches land, its massive size poses a continued threat not only to Florida’s Gulf Coast but also to the state’s Atlantic side.

In response to the storm, Florida’s economy, which represents about 2.8% of the U.S. GDP, faces disruptions. Airlines, energy companies, and major attractions like Universal Studios have begun halting operations, bracing for the storm’s impact.

With mandatory evacuations issued for more than a dozen coastal counties, including Hillsborough and Pinellas, over 500,000 residents in St. Petersburg alone have been ordered to evacuate. Mobile homes, nursing facilities, and assisted living centers are also under mandatory evacuation.

Fort Myers resident Jamie Watts, who lost his mobile home during Hurricane Ian in 2022, has taken shelter in a hotel with his wife this time. “We stayed during Ian and literally watched my roof tear off my house,” Watts said. “This time I’m going to be a little safer.”

As of Tuesday, traffic snarls and fuel shortages worsened the evacuation efforts. Around 17% of Florida’s nearly 8,000 gas stations had run out of fuel, according to GasBuddy.

The nation watches nervously as Hurricane Milton approaches, with hopes that Floridians in its path will find safety before the storm strikes.