A claims person or subrogation attorney can make excellent use of
historical weather to analyze a subrogation case. For example, if
historical rain data or stream flow data is needed for analysis of the
subrogation case, it is readily available. One such business that provides such data is SE Research:
http://www.locate-assets.com/forms/weather.htm
The data is useful in analyzing a structure and whether it was designed
and/or built properly, taking into account historical rain and floodwater.

For example, assume a “100 year flood” will produce water at 216’ above sea level. The water in a particular storm event only reached 215’ above sea level and the project flooded. Your analysis will be that this is probably a good subrogation case.

Likewise, if the designer/engineer used 216’ as a 100-year floodwater
height, and it was actually 215’ “as built”, then that data will be helpful in
sustaining the burden of proof against the designer/engineer if the project floods. In addition to water, freeze and heat temperatures, hail, and other weather records are also available and extremely helpful.

Another use is obtaining isotherm data on temperature, as some building codes refer to minimum temperature data (NFPA 13, for example).