Expert Witness Meteorologists


888-786-7696  or  800-843-7246










The Forensic Science Experts offer a variety of specialized meteorological and climatological, as well as hydrologic and environmental, services to the legal profession, insurance, government, business, industry, the media, academia, and the general public, including forensic discovery and expert witness testimony for civil litigation and criminal cases throughout the United States.

Charles B. Pyke, Ph.D. is the Principal Scientist and Primary & Managing Expert Witness Meteorologist of The Forensic Science Experts.

Timothy E. Wright, M.Sc. is an Expert Witness Meteorologist and GIS-capable Environmental Data Presentation Expert of The Forensic Science Experts.

Lawrence D. Bregman, M.S. is an Expert Witness Meteorologist and our Primary Air Quality Specialist, as well as a licensed Building Inspector.

Charles B. Pyke, Ph.D., the Principal Scientist and an Expert Witness Meteorologist of The Forensic Science Experts., is a highly experienced, well-known expert in his field.  His professional experience as a meteorologist and climatologist dates back several decades, including nearly 30 years as an Expert Witness.  Dr. Pyke was born in Southern California, where he grew up and attended UCLA, majoring in Meteorology, and earning his Bachelor's, then his Master's and Ph.D. under history's most renown meteorologist, Dr. J. Bjerknes.  After that, Dr. Pyke's four-year post-doctoral study under Prof. Bjerknes pioneered the effects of El Niňo and La Niňa on seasonal precipitation patterns from Southern California eastward to Georgia and Florida.

Dr. Pyke has been an Expert Witness on hundreds of civil litigation and criminal cases as a court-qualified expert witness since 1989.  He has testified in several dozen trials and in even more depositions.  For a detailed CV of Dr. Pyke, go to   [Contact (888) 786-7696]

Timothy E. Wright, M.Sc., an Expert Witness Climatologist and Meteorologist, and Environmental Data Presentation Expert, of The Forensic Science Experts, grew up in California and worked as a Meteorologist in California.  He earned his B.S. in Meteorology from Utah State University and his M.Sc. in Atmospheric Sciences from Indiana University.  Tim has been a Forensic Meteorologist for more than 16 years, with many cases as a Designated Expert Witness, some of which led to depositions and court trial testimony. 

Timothy Wright is a foremost expert witness on the subject of black ice or dew formation on asphalt (a very tricky item to determine), as well as on concrete, gravel, granite, wood, metal, grass, and other surfaces ....  through his scientific field measurements and modeling of temperatures of asphalt and other surfaces, and the temperatures of the soil beneath the surface material.

Mr. Wright is also highly skilled in weather modeling and multi-year weather outlooks, evaporation and evapotranspiration, and computer graphics of geophysical data.  Tim's multi-petabyte (multi-million-gigabyte) data base extends back to 1948.  Mr. Wright judiciously quality controls all of his data, and prepares computerized graphs and maps of dense networks of rainfall, snowfall, wind, temperature, and other weather elements around a forensic site, along with Google Earth photographs and animated radar and satellite charts, to provide the finest possible Power Point court trial exhibits available.  [Contact (888) 786-7696]

Lawrence D. Bregman, M.S., is our resident Southern California Meteorologist of The Forensic Science Experts.  He is our primary Air Quality Specialist and a Forensic Expert Witness for nearly all other climatological and meteorological issues.  Larry earned his B.S. and M.S. degrees in Atmospheric Sciences at UCLA, and was employed as a Meteorologist by the RAND Corporation and Southern California Edison Company for numerous years, before joining Dr. Pyke in private sector meteorology in 1989. 

Mr. Bregman is an experienced weather forecaster, especially on energy-related and air quality applications, and has testified in court trials as an Expert Witness Meteorologist on a number of civil litigation cases.  Larry has lived and worked in Southern California his entire life, including a 44-year professional meteorology career.

Mr. Bregman has also earned Real Estate and Building Inspection licenses.  He has been a professional Building Inspector for more than a decade and a California building code specialist.   [Contact (760) 684-5761]   

Dr. Pyke, Mr. Wright, and Mr. Bregman also work on occasion with Zane A. Stephens, M.S., a consulting Environmental Scientist and Meteorologist of The Forensic Science Experts.  Zane earned his B.S. and M.S. degrees at Utah State University in the fields of Meteorology, Climatology, Environmental Science, Geology, and Communications.  Mr. Stephens, whose meteorological and environmental career includes more than 30 years of experience, is also a Certified Hazardous Materials Trainer.   [Contact (800) 843-7246]   

Other Experts.  Dr. Pyke, Mr. Wright, and Mr. Bregman also work with Expert Hydrologic Engineer Dr. William J. Trott, P.E. [contact (760) 868-8699], as well as with our other Forensic Science Experts, which include climatologists, environmental scientists, geotechnical engineers, geohydrologists, hydrogeologists, and entomologists.  Combinations of these experts often serve as a trio or quartet of expert witnesses. on cases involving:

Floods generated by heavy rain and/or snow melt

Mud flows and landslides from rain-soaked hills

Landslides, slope failure, or liquefaction from earthquakes

Avalanches resulting from excessive snowfall, plus rain and/or strong wind

Trees blown down, with contributing factors:

Rain-soaked soil around the roots

Insect-generated disease of roots, trunks, or branches

Crop damage by wind-borne pesticide applications

Soil and water contamination resulting from import of debris / oil / trash / toxic chemicals / pesticides by floods or excessive runoff

Soil and water contamination resulting from drought / stagnation / concentration of toxins and foreign substances

Other multiple-element phenomena. 

Some of the meteorological elements and related atmospheric, hydrologic, and environmental conditions which our experts investigate include:

Black Ice, including black ice on asphalt  Dust storms  Sand storms  Haboobs. 

Sun glare  Sunrise  Sunset  Sun angle  Twilight  Cloud cover.

Dense fog  Rain  Snow  Freezing rain  Blizzards  Wind  Lightning  Hail.

Floods  Flash floods  Avalanches  Landslides  Mudslides  Debris flow.

Evapotranspiration or sublimation from water, soil, or paved surfaces, crops, and forests.

Tornadoes  Monsoons.  Microbursts  Severe thunderstorms.

Soil and water turbidity, algae, or pollution -- brought on or assisted by drought, floods, or extreme temperatures.

Drought  Extreme temperature (high or low)  Extreme humidity.

Civil twilight  Moonrise  Moonset  Moon phase  Lunar brilliance.

Frequency analysis of Evapotranspiration or of Precipitation and Other Weather Elements. 

Some of the cases requiring meteorological and hydrologic expert witnesses, and expert data analysis and graphical trial exhibit presentation, include:

Slip and fall on black ice, snow, or wet pavement

Vehicular accidents in sun glare, blowing dust or sand, or dense fog.

Vehicular accidents on wet, snowy, or icy roadways.

Road closures resulting from flooding, washouts, landslides, avalanches, or blown-down trees

Vehicles trapped or washed away by floods or flash floods, often resulting in injury or death to the occupants. 

Wind-caused injuries or death, such as blowing objects or falling trees

Lightning strikes, resulting in personal injury or death

Property damage or destruction, including roof leaks, resulting from wind, rain, snow, hail, lightning, mudslides, landslides, or wind-blown fire

Wrongful death issues, stemming from alleged negligent operation of a vehicle or machinery, negligent maintenance of property or trees, etc.

Crop or livestock loss resulting from wind, excessive rain or snow, floods, drought, freezes, excessive blowing sand, wind-blown fire, or extreme high temperatures

Crop or livestock loss resulting from soil or water turbidity or pollution brought on by drought, floods, mud or debris flows, ash from fires, or dust storms. 

Numerous other weather-related fatalities, injuries, property or crop damage, livestock loss, or other losses

In addition to  forensic discovery and expert witness testimony, our experts can provide, as requested: 

Certified weather, wind, precipitation, and storm data from the National Climatic Data Center.

Authentic sunrise, sunset, solar angle, civil twilight, moonrise, moonset, moon phase, and other data  from the U.S. Naval Observatory.

High-density coverage of wind, precipitation, evapotranspiration, satellite, radar, and flood data from multi-petabyte GIS-capable data base.

Expert data analysis;  broadcast-quality data graphing and mapping, pinpoint data interpolation, and presentation quality data tabulation.

Soil and water quality sampling, testing, and monitoring for forensic cases.

Visits to sites of crimes, accidents, floods, fires, wind damage, etc. 

Scientific investigation of evidence.

Consultation with attorneys and other experts.

Preparation of reports, tables, Power Point charts and maps, leading to court trial exhibits, as requested.


Research and Development.  Dr. Pyke, Mr. Wright, Mr. Bregman, as well as Mr. Stephens and William J. Trott, Ph.D., P.E., our Principal Hydrologic Engineer, are all research meteorologists, climatologists, and hydrologists of The Forensic Science Experts.

They and our other science and engineering colleagues can perform a great variety of research and studies in:

Theoretical and applied meteorology, hydrometeorology, and climatology, including advances in evapotranspiration applications.

Theoretical and applied hydrology and hydrologic engineering.

Geology, geotechnical engineering, structural engineering, oceanography, entomology, and other sciences and engineering.

The website for The Forensic Science Experts is:


Weather Forecasts and Outlooks.  Dr. Pyke, Mr. Wright, and Mr. Bregman are also experienced weather forecasters and long-range weather outlook specialists of The Forensic Science Experts.  We provide specialized weather forecasts for film production, the media, construction, agriculture, and numerous other clients, plus seasonal and multi-seasonal weather outlooks -- all administered by American Weather & Earth Sciences, LLC.

The website for American Weather & Earth Sciences, LLC is:


Environmental Services.  Dr. Pyke, Mr. Wright, Mr. Bregman, along with Mr. Stephens, are all research meteorologists / climatologists, and environmental scientists of  Environmental Science & Energy, Inc.  Dr. Trott is a research hydrologic engineer of ESE, Inc. 

The services of Environmental Science & Energy, Inc. include, among other services:

Environmental Services Division:

Site assessments, EIR, EIS, feasibility studies, world-wide.  New-technology scientific instruments.  Climate change modeling.

Renewable Energy Division:

Wind farm site evaluation.  Site assessments in support of renewable energy projects, world-wide.  Small-stream hydroelectric energy. 

High-efficiency solar panels.  Ocean wave, current, and tidal energy, world-wide.

Water Resources Division:

Evapotranspiration / sublimation modeling and projections, world-wide.  Water budget management and water reclamation, world-wide.     

Soil & water quality sampling / testing.  Ocean water desalination, world-wide. Remote-reporting flood warning & environmental monitoring systems, world-wide.

Environmental Data Division:  

GIS-capable environmental data from a multi-petabyte (multi-million-gigabyte) data base.  Expert data analysis, mapping, graphing, and animation.

Expert Witness Division:  

Forensic environmental discovery and expert witness testimony in depositions and court trials.  Preparation of Power Point exhibits for trials and depositions.

Information and Education Division:  

Certified hazardous materials (HAZMAT) Training.  Interactive online scientific seminars and classes.  DVD, TV, and Internet documentaries.  Public lectures.

Research and Studies Division:

Research into the serious air and water pollution problems in China, India, and elsewhere.  Frequency analysis of rain, snow, wind, and evapotranspiration.  

Environmental sciences, renewable energy, water supply, evapotranspiration, drought, and desalination feasibility research. 

The primary website for Environmental Science & Energy, Inc. is:












Contact Information:

The Forensic Science Experts  (888) 786-7696  or  (800) 843-7246.

e-mail:  Call (888) 786-7696 to obtain e-mail address.

FAX:   Call (888) 786-7696 to obtain FAX number.




2016  Forensic Science Experts, LLC., Charles B. Pyke, Ph.D., Owner, Member, and Principal Scientist.   All rights reserved.  Site is designed by Charles B. Pyke, and is administered and operated by Forensic Science Experts, LLC.  There are no restrictions to the downloading or printing, in whole or in part, of information about the professional services of Charles B. Pyke, Ph.D. Environmental Science & Energy, Inc., or Forensic Science Experts, LLC.   Site updated  5/26/2016.