Tim Marshall is a principal engineer and meteorologist with Haag Engineering Company based in Irving, Texas.   Tim specializes in surveying and assessing building damage in the wake of natural disasters.  He was born and raised in the Chicago, IL area and became interested in tornadoes when his hometown was struck by an F-4 tornado on April 21, 1967.   Tim earned his B.S degree in meteorology from Northern Illinois University in 1977, and earned an M.S. degree in Atmospheric Science from Texas Tech University in 1980.  He went on to earn an M.S. degree in Civil Engineering also from Texas Tech while working part time for the Institute for Disaster Research (now the National Wind Institute) in Lubbock, TX.   After graduating in 1983, Tim went to work for Haag Engineering Company and obtained his professional engineers license in 1989.  His job involves determining whether a building has sustained storm damage, and if so, determine the extent of storm damage, and repairability.

During his career, Tim has surveyed hundreds of tornado damage tracks including those in the Oklahoma City area in 1999, 2003, 2011, and 2013.  Tim is an avid storm chaser and has tracked more than 300 tornadoes and experienced more than two dozen hurricanes.  Tim has written about 100 papers on storms and building damage and has appeared on dozens radio and television programs.  He has served on committees to upgrade severe thunderstorm warnings, the Enhanced Fujita Scale and Saffir-Simpson damage scales.  In 2009 and 2010, Tim participated in the VORTEX 2 tornado research project and the ROTATE project in 2012, and TWIRL projects in 2016 and 2017.  His scientific mission was to deploy instrumented pods in advance of tornadoes in order to help determine their low-level wind fields. 

 Tim has been a member of the American Meteorology Society since 1974 as well as the National Weather Association, and American Society of Civil Engineers.