Jill C. Trepanier

Professor and Department Chair Louisiana State University

  • Baton Rouge LA

Dr. Trepanier is a hurricane climatologist and geographer focusing on the statistical estimation of extreme weather risk.

Contact

Louisiana State University

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Biography

Dr. Trepanier specializes in hurricane climatology and the estimation of risk using statistical methods. Currently, she uses this information to estimate risk to cultural heritage institutions, Native American sites, and coastal fisheries. She also assists in environmental science education development through the implementation of weather stations and real-time data to K-12 classrooms in South Louisiana.

Areas of Expertise

Climatology
Hurricanes
Geography
Environmental Science

Research Focus

Hurricane Risk & Tropical Cyclone Climatology

Dr. Trepanier’s research focuses on tropical-cyclone climatology and hurricane risk, analyzing how storm frequency, intensity, and stalling behavior endanger Gulf and Atlantic coasts. She employs extreme-value statistics, climate reanalyses, and hazard modeling to quantify wind and surge probabilities, project future risk under climate change, and guide coastal resilience planning.

Education

Florida State University

Ph.D.

Geography

2012

Florida State University

M.S.

Geography

2009

University of Wisconsin-Oshkosh

B.A.

Geography

2007

Spotlight

2 min

LSU’s Jill Trepanier Educating K-12 Louisiana Students About the Environment

What began in 2018 as a single rooftop weather station on LSU’s campus as a tool to help freshmen connect to the science happening around them, has grown into an educational network in the southern part of the state, connecting K-12 students with the sky through real-time data, interactive technology, and hands-on learning. Trepanier, a professor and department chair in LSU’s Department of Geography & Anthropology, leads a project that now includes 10 weather stations installed at or near K–12 schools from Lake Charles to Grand Isle. “The environment is harsh in Louisiana. Beautiful, but harsh,” Trepanier said. “The more students know about it, the better they can protect themselves and their families. For me, that’s what it is all about.” The project all started to help college students in Trepanier’s meteorology and physical geography classes connect more deeply with the material by using weather data collected from the air around them. “These were 400 freshmen every semester who were not geography majors, so they didn't really love the science of the atmosphere. But they were able to connect with the information because they could see the data on an app on their phone as they were living in it.” Installed across South Louisiana, each weather station is solar-powered and connected to a console that uploads data to an online web platform and displays it on a dashboard. Then an app shows the local students the current conditions and records for the day. “When we look at data from the community, it might be many miles from where you are. And most people live within a few miles or less of their schools. It allows them a close-up view of what is happening, instead of relying on something miles away,” she said. Teachers can use the data with certain lessons or during a passing storm. But the available data also educates them on things like solar radiation, “It also helps aid things like seasonality and our relationship with the sun. It extends well beyond just rain.” The material is also aligned with the Louisiana Student Science Standards for environmental and Earth sciences. “By allowing students to compare real data across space and time, it helps them to understand how systems are connected. And most of these science standards have them focusing on system theory, in one way or another,” Trepanier said. Read the full story here.

Jill C. Trepanier

Answers

Why did Hurricane Erin strengthen so quickly, and how unusual was this compared to other storms?
Jill C. Trepanier

Hurricane Erin strengthened quickly because there was nothing to impede development, such as strong wind shear or enhanced Saharan dust. The ocean waters are warmer than normal, and this provided ample fuel for rapid intensification. It is becoming evident that rapid intensification is a common occurrence in Atlantic hurricane seasons, so, historically, this is unusual. However, in recent seasons, we've seen more storms rapidly intensify, so it is becoming less unusual with time.

Media Appearances

Storms of the Century with Al Roker: How hurricanes are evolving with climate change

NBC News  tv

2025-05-28

Al Roker looks back at the most devastating hurricanes to hit the U.S. since the turn of the century, starting with Hurricane Katrina.

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A closer look at Atlantic hurricane season, eyes on Invest 97L

Fox News  tv

2025-08-10

The National Oceanic and Atmospheric Administration (NOAA) has previously said atmospheric and oceanic conditions favor what could be an above-average 2025 Atlantic hurricane season. LiveNOW’s Andy Mac is learning more from Dr. Jill C. Trepanier from LSU Geography & Anthropology, who specializes in hurricane climatology.

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Hurricane season in the Atlantic Basin heats up

Fox Weather  tv

2025-08-07

The Atlantic hurricane season is heating up. Dr. Jill Trepanier, hurricane climatologist and LSU professor, spoke about whether two systems currently in the Atlantic will develop.

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Articles

Spatiotemporal Climatology of Georgia Tropical Cyclones and Associated Rainfall

Journal of Marine Science and Engineering

2024

Tropical cyclones (TCs), often characterized by high wind speeds and heavy rainfall, cause widespread devastation, affecting millions of people and leading to economic losses worldwide.

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Stalling North Atlantic Tropical Cyclones

Journal of Applied Meteorology and Climatology

2024

Tropical cyclone (TC) translation speed influences rainfall accumulation, storm surge, and exposure to high winds. These effects are greatest when storms stall. Here, we provide a definition and climatology of slow-moving or stalling TCs in the North Atlantic from 1900 to 2020.

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Advances in tropical climatology – a review

Physical Geography

2024

Understanding tropical climatology is essential to comprehending the atmospheric connections between the tropics and extratropical latitudes weather and climate events. In this review paper, we emphasize the advances in key areas of tropical climatology knowledge since the end of the 20th century and offer a summary, assessment, and discussion of previously published literature.

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