Raymond Slade, Jr.
Adjunct Professor at Austin Community College and Registered Hydrologist
Many Texas storms represent some of the largest
storms in the world. For example, for durations ranging from 1 hour
to 48 hours, about one-half of the largest precipitation depths
in the world have occurred in Texas. Examples of these storms include
a 1921 storm in Thrall (Central Texas) that produced 32 inches of
rainfall in 12 hours and a 1935 storm in D'Hanis (South Texas) that
produced 22 inches of rain in 2 hours and 45 minutes.
Because of large storms, Texas usually leads
the Nation in annual deaths and damage costs from floods. Floods
occur regularly in Texas, and destructive floods occur somewhere
in the State every year. Additional flood problems often occur in
urban areas because delineated flood plains have not been increased
to account for flood increases caused by urbanization.
About the Distinguished Lecturer
Raymond M. Slade, Jr., one of the nation’s
leading authorities on floods and content matter expert for the
PBS documentary "Flash Flood Alley," will discuss the
real nature of Texas’ flood problems and why the heart of
Texas is the most flash-flood prone area in all of North America.
Raymond served as a Hydrologist for 33 years with the U.S. Geological
Survey in Texas. He was the Surface-Water Specialist for the Texas
District of the USGS from 1994 until his retirement in 2003. Since
his retirement from the USGS he has been an Adjunct Professor at
Austin Community College, is a part-time Hydrogeologist with the
Edwards Aquifer Research and Data Center at Texas State University,
has served as a volunteer for several water-resources related agencies,
and is a self-employed Consulting Hydrologist. He is certified and
registered as a Professional Hydrologist with the American Institute
A report describing Texas storms and floods and documenting characteristics
for individual large storms is presented online here.