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J. Marshall Shepherd

Georgia Athletic Association Distinguished Professor and Director, Atmospheric Sciences Program | Associate Dean UGA Franklin College of Arts and Sciences

  • Athens GA

A leading International expert on weather and climate frequently called upon by the White House, Congress, and national media.

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Spotlight

2 min

In his most recent  Forbes article, Dr. Marshall Shepherd takes a scientific look at why college students and fans storm football fields, blending insights from psychology, meteorology, and social dynamics. He explains that field-storming is not simply a burst of emotion—it’s a predictable outcome of collective excitement and shared identity. After an unexpected win or a high-stakes rivalry game, thousands of people simultaneously experience what psychologists call “emotional contagion,” amplifying feelings of unity and celebration. This shared surge, combined with environmental cues like stadium acoustics and crowd density, transforms the act into what Shepherd calls a form of “social weather event.” “Storming the field isn’t chaos—it’s choreography fueled by emotion and crowd physics.” Shepherd also examines the logistical and safety implications. He notes that while universities often celebrate these spontaneous displays of school pride, they carry risks ranging from crowd injuries to property damage. Yet, institutions are reluctant to ban them outright because these moments reinforce fan loyalty and media attention. Shepherd suggests that the solution lies in better understanding crowd behavior: designing stadiums with safe egress routes, training security teams to manage surges, and anticipating emotional tipping points rather than reacting afterward. “Understanding the science behind fan behavior lets us manage energy, not suppress it.” Ultimately, Shepherd’s piece reframes field-storming as a fascinating mix of culture and physics—where joy, identity, and momentum collide. He urges universities to see these moments not as mere rule-breaking but as opportunities to study human behavior in motion, and to design environments that celebrate passion without compromising safety. Dr. J. Marshall Shepherd is a leading international weather-climate expert and is the Georgia Athletic Association Distinguished Professor of Geography and Atmospheric Sciences at the University of Georgia. Dr. Shepherd was the 2013 President of American Meteorological Society (AMS), the nation’s largest and oldest professional/science society in the atmospheric and related sciences. View his profile here Dr. J. Marshall Shepherd is available to speak with the media about this interesting topic simply click on his icon now to arrange an interview today.

J. Marshall Shepherd

1 min

In a September article featured in Forbes, Marshall Shepherd reports on a new tool launched by Project Drawdown that aims to deliver personalized climate-action strategies to different users—including policymakers, businesses, and individuals. In the piece, he explains that the tool helps match context-specific emissions reduction or resilience options to the particular needs, geography, and capacities of the user, rather than prescribing one-size-fits-all solutions. Shepherd also emphasizes that tools like this can help bridge the gap between climate science and real-world decision-making. He argues that equipping stakeholders with tailored pathways could accelerate uptake of effective interventions by making them more relevant, feasible, and compelling. Ultimately, Shepherd presents the new Drawdown resource as a promising model for democratizing access to climate solutions, enabling individuals and organizations to engage in strategies best suited to their specific circumstances. Dr. J. Marshall Shepherd is a leading international weather-climate expert and is the Georgia Athletic Association Distinguished Professor of Geography and Atmospheric Sciences at the University of Georgia. Dr. Shepherd was the 2013 President of American Meteorological Society (AMS), the nation’s largest and oldest professional/science society in the atmospheric and related sciences. View his profile here Dr. J. Marshall Shepherd is a leading international weather-climate expert and is the Georgia Athletic Association Distinguished Professor of Geography and Atmospheric Sciences at the University of Georgia. He's available to speak with the media about this topic simply click on his icon now to arrange an interview today.

J. Marshall Shepherd

2 min

In a recent Forbes article, Marshall Shepherd reflects on three key lessons he has drawn from the life and work of Dr. Jane Goodall. Shepherd frames Goodall’s legacy—spanning primatology, conservation, and public engagement—as deeply instructive for climate scientists and environmental advocates. He argues that her methods and mindset have more to teach than simply how to observe nature; they speak to how we engage with the world. First, Shepherd highlights immersion: Goodall’s decades of patient observation in the Tanzanian forests demonstrates the power of being physically—and emotionally—present to truly learn from ecosystems. For Shepherd, climate science must go beyond remote data collection: getting into the field and understanding local realities matters. Second, he emphasizes patience. Goodall’s willingness to wait, sometimes for years, for breakthroughs in understanding primate behavior offers a lesson for climate researchers, whose progress may unfold over decades. Third, he admires her tenacity—a commitment sustained over a lifetime, even under adversity. Shepherd suggests that tackling climate change requires that same kind of enduring resolve, especially when public attention or funding waxes and wanes. Through these reflections, Shepherd presents Goodall not just as an icon of conservation but as a model for scientific humility and perseverance. He invites readers to see the parallels between animal behavior research and climate work—and to adopt practices of listening, patience, and resolve in confronting our planet’s changing trajectory. Dr. J. Marshall Shepherd is a leading international weather-climate expert and is the Georgia Athletic Association Distinguished Professor of Geography and Atmospheric Sciences at the University of Georgia. Dr. Shepherd was the 2013 President of American Meteorological Society (AMS), the nation’s largest and oldest professional/science society in the atmospheric and related sciences. View his profile here Dr. J. Marshall Shepherd is a leading international weather-climate expert and is the Georgia Athletic Association Distinguished Professor of Geography and Atmospheric Sciences at the University of Georgia. He's available to speak with the media about this topic simply click on his icon now to arrange an interview today.

J. Marshall Shepherd

Media

Biography

Dr. J. Marshall Shepherd is a leading international weather-climate expert and is the Georgia Athletic Association Distinguished Professor of Geography and Atmospheric Sciences at the University of Georgia. Dr. Shepherd was the 2013 President of American Meteorological Society (AMS), the nation’s largest and oldest professional/science society in the atmospheric and related sciences. Dr. Shepherd serves as Director of the University of Georgia’s (UGA) Atmospheric Sciences Program, the Associate Director of Climate and Outreach for the Institute for Resilient Infrastructure Systems, and Full Professor in the Department of Geography. In 2023, he was appointed Associate Dean for Research, Scholarship and Partnerships in the Franklin College of Arts and Sciences at the University of Georgia. His areas of research include urban climate, hydrometeorological extremes, weather-climate risk, and innovative outreach strategies.

In 2024, Dr. Shepherd received the National Academies’ Eric and Wendy Schmidt Award for Excellence in Science Communication and was honored with the American Association of Geographers Presidential Achievement Award. In 2023, he received the prestigious Environmental Law Institute Award. In 2023, Dr. Shepherd also moderated a discussion with Vice President Kamala Harris on climate change. He was selected as the 2022 Southeastern Conference (SEC) Professor of the Year following a historic accomplishment the previous year. In 2021, Dr. Shepherd was elected to the National Academy of Sciences, National Academy of Engineering, and the American Academy of Arts and Sciences.

Dr. Shepherd is frequently sought as an expert on weather, climate, and remote sensing. He is host of The Weather Channel’s Award-Winning Weather Geeks, Senior Contributor to Forbes Magazine and routinely appears on CBS Face The Nation, NOVA, The Today Show, CNN, and Fox News. His 3 TED Talks have nearly 3 million viewers, and he is also frequently asked to advise key leaders at NASA, the White House, Congress, Department of Defense, and officials from foreign countries. Dr. Shepherd has attracted several millions of dollars in extramural research support from NASA, National Science Foundation, Department of Energy, Defense Threat Reduction Agency, U.S. Forest Service and the Ray C. Anderson Foundation.

Areas of Expertise

Hurricane and Tropical Storms
Climate
Weather
Data Analysis
Climate Change
Remote Sensing

Media Appearances

2 Hour Lead Time For Tornadoes Is Possible But Do We Want It?

Forbes  online

2025-05-08

We are in the peak of the U.S. severe weather season, and tornadic storms have been particularly prevalent this season. During my tenure in the meteorological field, one of the “holy grail” research challenges has been to improve tornado warning lead times. A NOAA research program has demonstrated that we may be able to give up to two hours of advance warning of a tornado. Here’s how it is possible as well as some thoughts on whether we want it.

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Why A New Weather App Is Causing Such A Buzz

Forbes  online

2025-03-10

Weather apps are a staple of life these days. Over the years, I have written several commentaries on their pros and cons. From my perspective as a meteorologist, the “cons” often outweigh the “pros,” but a new app is generating significant buzz. Here’s why.

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Late-season tropical threat taking shape in the Caribbean, forecasts show

ABC News  online

2024-11-14

"The conditions are definitely favorable for this storm to get its act together," Marshall Shepherd, director of the Atmospheric Sciences Program at the University of Georgia and former president of the American Meteorological Society, told ABC News.

"This is definitely a storm we've got to keep an eye on," Shepherd added.

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Event Appearances

Effect of cities on rainfall and the implications for drainage design

2004 | World Water and Environmental Resources Congress  

Urban effects on rainfall variability: Potential implications for Georgia’s water supply

2009 | Proceedings of the Georgia Water Resources Conference  

Research Grants

Engineering With Nature ® Initiative

US Department of Army

05/01/2020-04/30/2023

Cooperative Institute for Satellite Earth System Studies (CISESS)

NOAA

UGA PI

Towards Conceptualization and Predictability: A Multi-scalar Analysis of Urban-Influenced Hydrometeorological Processes

NASA

07/01/19-06/30/24

Education

Florida State University

B.S.

Physical Meteorology

Florida State University

M.S.

Physical Meteorology

Florida State University

Ph.D.

Physical Meteorology

Published Works

A Review of Current Investigations of Urban-Induced Rainfall and Recommendations for the Future

Earth Interactions

2005-07-01

Precipitation is a key link in the global water cycle and a proxy for changing climate; therefore, proper assessment of the urban environment’s impact on precipitation (land use, aerosols, thermal properties) will be increasingly important in ongoing climate diagnostics and prediction, Global Water and Energy Cycle (GWEC) analysis and modeling, weather forecasting, freshwater resource management, urban planning–design, and land–atmosphere–ocean interface processes. These facts are particularly critical if current projections for global urban growth are accurate.

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Quantifying the contribution of tropical cyclones to extreme rainfall along the coastal southeastern United States

Geophysical Research Letters

2007-12-16

Analysis of a unique satellite precipitation dataset coupled with an extensive database of storm tracks are used to develop a parameter called the “millimeter-day (MD).” MD analysis in 4 mini-basins near coastal southeastern United States reveals that September and October account for the largest number of extreme rainfall days (e.g. “wet millimeter-days” or MD > 0) during the 1998–2006 Atlantic hurricane seasons.

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A global spatiotemporal analysis of inland tropical cyclone maintenance or intensification

International Journal of Climatology

2014-02-01

Forecasting tropical cyclone ( TC) intensity changes over land is complicated by interactions of various surface and atmospheric features. Due to generally unfavorable conditions, many TCs weaken and decay soon after landfall. In some cases, TCs may also transition to extratropical cyclones (ETs). Despite the absence of oceanic forcing, a number of TCs have been observed to maintain or increase strength inland, termed 'tropical cyclone maintenance or intensification' (TCMIs). This study identifies the environments and characteristic features of TCMIs and explores physical processes that may help to produce an atmosphere conducive for tropical systems.

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Affiliations

  • NASA Earth Science Advisory Committee: chairman
  • American Meteorological Society (AMS) : Past President
  • American Geophysical Union
  • Association of American Geographers (AAG)
  • International Association for Urban Climate (IAUC)

Accomplishments

AMS Brooks Award

2017

AMS Helmut Landsberg Award

2018

AGU Climate Communication Prize

2019

Languages

  • English