CU Extreme Wx Blog

Willis Re: Thunderstorms Pose as Much Property Risk as Hurricanes

by | March 23, 2017
Category: Uncategorized

London, 20 March 2017 — Risk to U.S. property from thunderstorms is as high as from hurricanes, according to new research published by Willis Re, the reinsurance division of Willis Towers Watson (NASDAQ: WLTW), the global advisory, broking and solutions company. A report compiled with Columbia University, a member of the Willis Research Network (WRN), […]

Is the Oroville dam failure a climate change story?

by | March 8, 2017
Category: Uncategorized

In February, after torrential rains led to partial failure of a spillway on Northern California’s Oroville Dam, forcing evacuation of nearly 200,000 people downstream, Stanford climate scientist Noah Diffenbaugh wrote an op-ed in The New York Times entitled “What California’s Dam Crisis Says About the Changing Climate.” My colleague, Upmanu Lall, director of the Columbia […]

Can There be a Cure for Catastrophe?

by | March 6, 2017
Category: Uncategorized

On Thursday March 2nd 2017 the Initiative on Extreme Weather and Climate hosted Dr. Robert Muir-Wood, the head of research at Risk Management Solutions (RMS) and a world-leading “catastrophe scientist” who presented “The Cure for Catastrophe – how we can stop manufacturing natural disasters,” based on his book by the same title. Opening with a […]

S2S Workshop

by | December 13, 2016 | 1 Comment

By Zane Martin Last week hundreds of scientists from around the world attended the Workshop on Sub-seasonal to Seasonal Predictability of Extreme Weather and Climate online and at Columbia University’s bucolic Lamont-Doherty Earth Observatory. Organized by Columbia’s International Research Institute for Climate and Society (IRI) and Initiative on Extreme Weather and Climate, in conjunction with the WWRP/WCRP Sub-seasonal to […]

Sustainable Development and Collaborative Governance in NYC

by | November 18, 2016

On Thursday November 17, 2016 the Conference on Sustainable Development and Collaborative Governance took place at Laguardia Community College. Sponsored by Governor Cuomo, the conference presented many different concepts on how New York State as a whole and more specifically New York City can reap the benefits of becoming leaders in sustainability and resilience. The […]

Climate Risk and National Security: People not Polar Bears

by | September 23, 2016 | 1 Comment

On Thursday, September 22nd, the Initiative on Extreme Weather and Climate hosted its biggest seminar to date. To an audience of over 100 people, Dr. David Titley presented Climate Risk and National Security: People not Polar Bears. Titley, a retired Rear Admiral in the US Navy who is now a Professor of Practice in Meteorology […]

Severe convection and tropical cyclone risk: Collaborations between academia and industry

by | August 2, 2016
Category: Uncategorized

The Initiative held two events this spring which have been written up in documents now available online. Our Severe Convection and Climate Workshop, held on March 9-10, 2016, is described in detail in a report lead-authored by John Allen (formerly of IRI, now an Assistant Professor at Central Michigan University) for the Bulletin of the American […]

Lamont: Assessing Extreme Weather Risk

by | March 23, 2016
Category: Uncategorized

In Lamont’s 2015 Annual Report, an article by Stacy Morford summarizes some of the research on climate and extreme weather risk going on at Lamont.

Rapidly intensifying hurricanes and bunched-up tornadoes

by | March 4, 2016
Category: Uncategorized

Two recent papers in Nature Communications by Columbia researchers focus on properties that emerge when one analyzes the statistical distributions of two different types of severe storms – tropical cyclones and tornadoes. Both highlight the most extreme instances of these already extreme events, and find surprising behavior in both, though in quite different ways. The first paper, […]

Spontaneous clumping of tropical clouds

by | July 23, 2015 | 1 Comment

If you take a look at nearly any satellite image of clouds in the tropics (for example, the GOES west geostationary satellite image from a few days ago), you’ll notice that convective clouds (the tall thunderstorm clouds associated with strong circulations) tend to be organized into clusters. This clustering ranges from features such as squall […]