Professor William M. Gray


Professor Gray has worked in the observational and theoretical aspects of tropical meteorological research for more than 40 years, much of this effort going to investigations of meso-scale tropical weather phenomena. He has specialized in the global aspects of tropical cyclones for his entire professional career. He studied under Professor Herbert Riehl who arranged his early reconnaissance flights into hurricanes in 1958. He has been involved with studies of broad-scale cumulus interactions and has extensively studied the processes associated with tropical cyclone structure, development, and movement. Numerous satellite-based studies of tropical weather systems have also been accomplished. Current areas of research include: 1) tropical cyclone structure, movement and intensity change; 2) seasonal prediction; 3) meso-scale tropical weather systems, 4) diurnal variability of tropospheric vertical motions and 5) ENSO variability. Professor Gray has made Atlantic basin seasonal hurricane forecasts for the last 23 years. He was a pioneer in developing these types of forecasts.

B.A. George Washington University (1952)
M.S. University of Chicago (1959), in Meteorology
Ph.D. University of Chicago, Dept. of Geophysical Sciences (1964). Dissertation is entitled ''On the Scales of Motion and Internal Stress Characteristics of the Hurricane''.

Weather Forecasting duty as Air Force Officer, 1953-1957
Research Assistant, Dept. of Meteorology, Univ. of Chicago, 1957-1961.
Faculty of Dept. of Atmospheric Science, Colorado State University, 1961-present.
Professor, 1974 to present.

Advisor of 50 successful MS (theses) graduates and 20 successful Ph.D. graduates in Atmospheric Science, eight of whom have received AMS awards as students. Panel Member - U.S.-Japan Mutual Science Program (Panel 7-Tropical Storms) - 1964-1969; Panel Member - American Meteorological Society Committee on Hurricanes and Tropical Meteorology 1968-1973, 1978-1981. Chairman 1987-1990; Advisor - U.S. GATE Meso-scale and Cumulus Sub-Programs 1969-1972; Panel Member - USAF Scientific Advisory Board on Tropical Cyclone Aircraft Reconnaissance (1973-1974); USAF Reserve Officer - 1957-1973; U.S. Representative - WMO Working Group on Tropical Meteorology (1975-1988); Co-organizer of three-week NCAR GATE Workshop (summer, 1977); Chairman, Organizing Committee for first WMO International Workshop on Tropical Cyclones, Bangkok, Thailand, 1985; Fellow, American Meteorological Society.

Fellow, American Meteorological Society; CSU ``Jack E. Cermak'' Graduate School Award for Outstanding Adviser (1992); Co-recipient of AMS Banner I. Miller Award (1993); AMS Jule L. Charney Award (1993); Neil Frank Award of the National Hurricane Conference (April 14, 1995), ``for pioneering research into long-range hurricane forecasting and for developing a better understanding of how global climatological conditions shape the creation and intensity of tropical cyclones"; Invited lecture for Eighth IMO Lecture to the 12th WMO Congress, Geneva, June, 1995. (This is an honorary award given to senior scientists in recognition of lifetime research achievements; ABC Television ``Person of the Week", September, 1995; Man of Science Award by the Colorado Chapter of Achievement Reward College (ARC) Scientist (1995).

Over 80 published papers and 60 more extensive research reports.
Hundreds of Conference talks and conference proceedings.
Papers available on CSU website (

Printed on 1/9/21

Global Warming

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Dr. William Gray on Global Warming

This is a presentation Dr. William Gray gave to the Republican Study Committee of Colorado (RSCC) concerning the global warming issue. The presentation was given at an ad-hoc hearing on global warming held on April 27, 2007 at the Colorado State Capitol.

To make it easier to access specific portions of the presentation it is divided into seven segments, listed here chronologically.

Part One (9 minutes):

Topics: introduction, research funding, and global warming is not a settled issue.

Part Two (8 minutes):

Topics: history of global temperatures, and popular opinion of global warming does not align with scientific evidence.

Part Three (7 minutes):

Topics: recommended books, history of media reporting on global warming and global cooling, Dr. Gray's predictions, and water vapor is the number one greenhouse gas.

Part Four (11 minutes):

Topics: the limitations of computer modeling, and research funding.

Part Five (7 minutes):

Topics: most research funding is going to computer modeling, complexities of climate factors, deep ocean circulation, water vapor feed back loop, and research funding.

Part Six (7 minutes):

Topic: the history of hurricane frequency and its relationship to CO2.

Part Seven (10 minutes):

Topics: Q & A session covering solar radiation, long term climate change patterns, effects of volcanoes, and Asian tropical storm patterns.

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