Expert Witness Testimony & Legal Applications in Meteorology Flashcards

What term describes the legal principle that an expert witness can be compelled to testify about facts or opinions related to their expertise even without being voluntarily retained?

Answer: Subpoena ad testificandum

A subpoena ad testificandum is a court order requiring a person to appear and testify; unlike a retained expert, a subpoenaed expert may not choose whether to testify.

In the context of legal meteorology, what does 'chain of custody' primarily refer to?

Answer: Documentation showing that weather data records have been maintained without alteration from source to courtroom

Chain of custody establishes that evidence—including weather data—has not been tampered with or altered, which is critical for admissibility and credibility in legal proceedings.

Which of the following best describes 'voir dire' as it applies to expert witnesses in a trial?

Answer: An in-court examination by attorneys to qualify or challenge the expert's credentials before testimony begins

Voir dire for experts is a preliminary examination by counsel—often before the jury—to establish the witness's qualifications or to challenge them before substantive testimony is admitted.

What is the key legal distinction between a 'fact witness' and an 'expert witness' in litigation?

Answer: Expert witnesses may offer opinions and draw inferences beyond firsthand observation; fact witnesses testify only to what they personally perceived

Under FRE 701 and 702, lay (fact) witnesses are generally limited to their direct observations, while qualified experts may offer opinion testimony based on specialized knowledge applied to the facts of the case.

A CCM providing forensic meteorological services discovers that the weather data most favorable to the retaining attorney's case contains obvious quality-control errors. The ethical obligation is to:

Answer: Flag the quality-control issues in the report and use corrected or alternative data sources

Professional and ethical standards require the expert to report data quality issues transparently and base opinions on the best available, quality-controlled information regardless of litigation strategy.

When providing weather reconstruction testimony, what does the term 'interpolation' mean in the context of estimating conditions at an unobserved location?

Answer: Estimating values at an unmeasured point using data from surrounding observation stations

Spatial interpolation uses surrounding station data with mathematical techniques (e.g., inverse distance weighting, kriging) to estimate conditions at a site that lacked direct instrumentation.

Under the Frye standard (general acceptance test), which criterion determines the admissibility of scientific expert testimony?

Answer: The methodology used is generally accepted by the relevant scientific community

The Frye standard, still applied in some states, holds that scientific evidence is admissible only if the principles or techniques used are generally accepted within the relevant scientific field.