Lightning Scatter Group Size Estimate

Qualified caller-reference retrieval for Lightning Scatter Group Size Estimate. Independently applicable actual incident/site/terrain/weather/electricalcontact and qualifiedlightning-safetyincidentreference;no forecastsafe scatterdistances/groupfatalities. Does not compute omitted scientific/design/predictive models or publish authoritative complete tables. Source truth and applicability external;examples illustrative. No diagnosis,compliance,identity determination,safe-use approval or guaranteed forecast.

Description

Lightning casualty evidence depends on incident conditions and the population being considered.

Lightning casualty evidence depends on incident conditions and the population being considered.^[1]

This tool retrieves a caller-supplied, context-qualified record; it does not estimate fatalities from group size or recommend a shelter or spacing distance.

When to use Lightning Scatter Group Size Estimate

Use this tool to select a specific record from a reference set you have independently verified.

How to use Lightning Scatter Group Size Estimate and how it works

Identify the applicable source edition, conditions and date for Lightning Scatter Group Size Estimate.
Enter that context and the aligned reference keys and texts, then set queryReferenceKey to an exact key.
Run the tool and read result.qualifiedReferenceText together with result.source, result.context and result.asOfDate.
If the key is rejected, inspect spelling, case, duplicate keys and list alignment; review the selected record against the original source before applying it.

Input field	Meaning	Value type	Requirement
callerVerifiedSource	Identifier for the source and edition independently checked by the caller.	string	required; further conditions in the algorithm
callerVerifiedContext	Applicability, units, population or measurement conditions for the supplied evidence.	string	required; further conditions in the algorithm
callerVerifiedAsOfDate	Real Gregorian as-of date in YYYY-MM-DD format.	string	required; further conditions in the algorithm
callerReferenceKeys	Distinct nonblank exact identifiers aligned with reference texts.	array of string	required; dense; align related rows as specified; at most 128 strings; 128 UTF-16 units each; further conditions in the algorithm
callerReferenceTexts	Nonblank records aligned with reference keys; supplied by the caller.	array of string	required; dense; align related rows as specified; at most 128 strings; 512 UTF-16 units each; further conditions in the algorithm
queryReferenceKey	Exact case-sensitive key of the record to retrieve.	string	required; further conditions in the algorithm

Validate a nonblank bounded source and context and a real Gregorian as-of date. Require aligned nonempty keys and texts, distinct nonblank keys and nonblank records. Find the query with exact case-sensitive index matching; return that record and source, context and date unchanged. An absent key is an input error. No source is fetched or independently verified.

selected text = callerReferenceTexts[indexOf(queryReferenceKey in callerReferenceKeys)]

Apply the declared units, ordering and branch conditions.

Output field	Meaning	Value type
result	Object containing the declared output fields.	object
result.qualifiedReferenceText	Exact selected caller-supplied record text, unchanged.	string
result.source	Caller-supplied source identifier, returned unchanged.	string
result.context	Caller-supplied applicability context, returned unchanged.	string
result.asOfDate	Caller-supplied Gregorian as-of date, returned unchanged.	string

json

{
  "input": {
    "callerVerifiedSource": "independently-reviewed-source/edition",
    "callerVerifiedContext": "Lightning casualty evidence depends on incident conditions and the population being considered. This tool retrieves a caller-supplied, context-qualified record; it does not estimate fatalities from group size or recommend a shelter or spacing distance. Synthetic record/calibration; replace with independently applicable evidence.",
    "callerVerifiedAsOfDate": "2026-01-01",
    "callerReferenceKeys": [
      "record-a",
      "record-b"
    ],
    "callerReferenceTexts": [
      "Illustrative qualified record; replace with actual independently applicable source evidence.",
      "Second illustrative record, not normative data."
    ],
    "queryReferenceKey": "record-a"
  },
  "output": {
    "result": {
      "qualifiedReferenceText": "Illustrative qualified record; replace with actual independently applicable source evidence.",
      "source": "independently-reviewed-source/edition",
      "context": "Lightning casualty evidence depends on incident conditions and the population being considered. This tool retrieves a caller-supplied, context-qualified record; it does not estimate fatalities from group size or recommend a shelter or spacing distance. Synthetic record/calibration; replace with independently applicable evidence.",
      "asOfDate": "2026-01-01"
    }
  }
}

Limitations and assumptions

The operation is caller-reference retrieval. You supply and verify the relevant records; the title does not imply an installed authoritative table, scientific classifier, calculator or assessment. Source accuracy, rights, applicability and freshness are external responsibilities.

Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A returned boolean, signed difference or tied result follows the stated convention; an input error instead means the required input contract was not satisfied. Very large inputs or outputs may be rejected by shared resource limits.

Alternative or Complementary methods

Use Lightning Protection Reference for the related operation. Retrieve a separately qualified caller-supplied protection-zone record rather than infer shelter suitability from a casualty record.^[2]

Use Observed Lightning Flash Density for the related operation. Summarize externally deduplicated flashes over measured area and years with a supplied detection efficiency; this is not personal strike risk.^[3]

References

Lightning Scatter Group Size Estimate — tool.io
Lightning Protection Zone Calculator — tool.io
Lightning Flash Density Per KM2 Year Lookup — tool.io

Similar or alternative tools

Lightning Protection Reference
Retrieve a separately qualified caller-supplied protection-zone record rather than infer shelter suitability from a casualty record.
Observed Lightning Flash Density
Summarize externally deduplicated flashes over measured area and years with a supplied detection efficiency; this is not personal strike risk.