A Weather Evidence Report is a structured document that compiles archived weather observation data for a specific location and date into a formatted record showing what conditions occurred, when they occurred, and how severe they were. It is not a forecast, not a climate summary, and not an expert opinion. It is a documentation tool that organizes the recorded meteorological data into a format designed for insurance claims, legal proceedings, and other situations where an independent record of past weather conditions is needed.
If you have heard the term and are trying to understand what it is, who uses it, and whether you need one, this article explains the concept, what a typical report contains, and how it compares to other ways of accessing historical weather data.
What a Weather Evidence Report Contains
A typical Weather Evidence Report includes several components that work together to provide a complete picture of conditions on a specific date and at a specific location.
Hourly weather observations
Temperature, precipitation, wind speed, wind gusts, visibility, humidity, and barometric pressure recorded at regular intervals throughout the 24-hour period. This data comes from ASOS and AWOS stations within national weather observation networks maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Weather Service.
Daily summary
Total precipitation, maximum wind gust, temperature range, and an overall characterization of the day's conditions.
Severity classification
A structured assessment of conditions based on defined meteorological thresholds. Typical classifications range from Baseline (conditions within normal ranges) through Measurable, Moderate, and Severe, based on factors like wind gust speed, precipitation amounts, and the presence of convective weather.
Weather alerts
Any NWS alerts, warnings, or watches that were in effect at the location during the date, including Severe Thunderstorm Warnings, Tornado Warnings, Winter Storm Warnings, and similar notifications.
Storm event records
If the NCEI Storm Events Database includes documented weather events for the county on the date, these are included with their type, magnitude, and narrative descriptions.
Station information
The observation station used, its location, and its distance from the subject property. This provides transparency about the data source and allows the reader to assess how representative the data is.
Data sources and methodology
A description of where the data came from, how it was processed, and what thresholds were applied. This section establishes the report's credibility by documenting its methodology.
Who Uses Weather Evidence Reports
Weather Evidence Reports serve a range of professional and personal documentation needs.
Homeowners filing insurance claims
Use them to document that severe weather occurred at their property on the date they are reporting damage. The report provides independent documentation that the adjuster can reference during the claim evaluation.
Attorneys
Use them for initial case evaluation (did the weather conditions support the client's account?), demand letters (providing documented conditions as part of a negotiation package), and litigation support (establishing a factual record of conditions). For more on how weather data is used in legal proceedings, see Can You Use Weather Data as Evidence in Court?
Public adjusters
Use them when representing policyholders in claim disputes. The report provides documented conditions that the public adjuster can reference when discussing the claim with the insurer.
Contractors
Use them to document weather conditions that caused schedule delays, supporting time extension requests under construction contracts. For daily weather documentation on construction projects, see How to Document a Weather Delay on a Construction Project.
Travelers
Use them to support travel insurance claims by documenting that severe weather conditions existed at the airport on the date of their flight cancellation or delay.
Auto accident claimants
Use them to document that weather conditions such as rain, ice, fog, or snow were present at the time and location of an accident, supporting claims that weather was a contributing factor.
How It Compares to Other Weather Data Sources
Several options exist for accessing historical weather data, and they serve different purposes at different price points.
Free weather apps and websites
Provide basic historical lookups (daily high/low temperature, general conditions) but typically lack hourly detail, severity classification, NWS alerts, and storm event records. They are useful for casual reference but generally lack the structure and sourcing needed for formal documentation. For a detailed comparison, see How to Check Past Weather Conditions.
Raw NOAA data access
Through Climate Data Online and other portals provides the underlying observation data in technical formats. The data is comprehensive but requires meteorological knowledge to interpret and does not come formatted for use in claims or legal proceedings.
Records from NCEI
Include formal documentation issued by the National Centers for Environmental Information, a division of the U.S. Department of Commerce. They are primarily used in federal court proceedings where formal authentication may be required. They typically cost $191 or more and take one to three weeks for delivery. For a cost comparison, see Historical Weather Records: Cost Comparison.
Forensic meteorologist reports
Provide expert analysis including radar interpretation, atmospheric modeling, and professional opinions about conditions at a specific location. They typically cost $2,000 to $10,000 and are appropriate for high-value litigation or disputed conditions. For a detailed breakdown, see The Cost of a Forensic Meteorologist Report.
Structured Weather Evidence Reports
Compile archived observation data, NWS alerts, and storm event records into a formatted document with severity classification and methodology documentation. They are designed for the cases that fall between a casual weather lookup and a full expert engagement.
What a Weather Evidence Report Is Not
Understanding the limitations of a Weather Evidence Report is important for using it appropriately.
It is not expert testimony
The report compiles and organizes archived data. It does not provide expert opinions about conditions at a specific micro-location, interpret radar imagery, or offer professional conclusions about causation.
It is not a substitute for a forensic meteorologist
If the weather conditions at your specific location are disputed, if radar interpretation is required, or if you need someone to testify in court, a forensic meteorologist provides a level of analysis that a structured report cannot.
It is not a guarantee of any specific claim outcome
The report documents what conditions were recorded. How those conditions are evaluated in the context of an insurance claim, legal case, or contract dispute depends on many other factors.
Frequently Asked Questions
It is used to document the recorded weather conditions at a specific location and date. Common uses include insurance claims (property damage, auto accidents, travel disruptions), legal proceedings, construction delay documentation, and any situation where an independent record of past weather conditions is needed.
The data comes from archived weather observations recorded by ASOS and AWOS stations within national observation networks operated by NOAA and the National Weather Service. Additional data may come from NWS alert archives and the NCEI Storm Events Database.
Automated reports that compile archived observation data can typically be generated in under two minutes. This compares to one to three weeks for certified records from NCEI and days to weeks for forensic meteorologist reports.
No. A Weather Evidence Report compiles archived observation data into a structured format. A forensic meteorologist report includes expert scientific interpretation, radar analysis, atmospheric modeling, and professional opinions. Both rely on observation data recorded by monitoring stations within national weather observation networks, but the forensic report includes expert analysis that goes beyond the recorded data.
Costs vary by provider. StormRecord reports are $49 per report. This compares to $191+ for certified records from NCEI and $2,000 to $10,000 for forensic meteorologist analysis.
Weather data from archived government observation records is frequently referenced in legal proceedings. Whether a specific report is admissible depends on the court, the jurisdiction, and the applicable evidentiary rules. For a detailed discussion, see Can You Use Weather Data as Evidence in Court?
The Bottom Line
A Weather Evidence Report takes the raw weather data that is permanently archived in government observation records and presents it in a structured, readable format with severity classification, alert documentation, and methodology transparency. It fills the gap between a free weather app lookup (which lacks the detail and sourcing needed for formal documentation) and a forensic meteorologist engagement (which provides expert analysis at a significantly higher cost).
For most insurance claims, demand letters, case evaluations, and documentation needs, a structured report provides a clear summary of the recorded conditions. For cases that require expert testimony or site-specific analysis, the report provides a useful starting point before engaging a specialist.
This article is provided for informational purposes only and does not constitute legal or insurance advice.
StormRecord articles are prepared using archived U.S. government weather data and reviewed for technical accuracy by a degreed meteorologist.
StormRecord does not provide legal or insurance advice. The appropriate level of weather documentation depends on the specific requirements of your case or claim.