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Storm Gap Boundary Policy Tool

Resolve a caller-supplied inter-event dry-gap convention without selecting a storm separation threshold.

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Description

Split events at gap greater than the threshold, including equality only when equalitySplits.

Event boundaries and partial observation intervals depend on a chosen endpoint convention. Equality at a supplied threshold may change a classification even when the underlying measurements are unchanged.

Split events at gap greater than the threshold, including equality only when equalitySplits.

When to use this tool

Use Storm Gap Boundary Policy when you need to apply an explicit interval or event-separation rule.

How to use the tool and how it works

  1. Enter dryGap, suppliedThreshold, equalitySplits. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read splitEvents. Inspect splitEvents before interpreting the associated values.

Require nonnegative dryGap and suppliedThreshold. Split events at gap greater than the threshold, including equality only when equalitySplits.1

Input fieldMeaning and unitsAccepted input
dryGapDry GapRequired. Finite number; minimum 0.
suppliedThresholdSupplied ThresholdRequired. Finite number; minimum 0.
equalitySplitsEquality SplitsRequired. Boolean.
Output fieldInterpretationReturned shape
splitEventsSplit EventsRequired. Boolean.
json
{
  "input": {
    "dryGap": 6,
    "suppliedThreshold": 6,
    "equalitySplits": true
  },
  "output": {
    "splitEvents": true
  }
}

Limitations and assumptions

  • Gap and threshold share a time unit; the separation rule is supplied rather than a universal storm definition.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Document the observation resolution and event-definition policy before comparing records from different sources.

References

  1. Calculation and input contract: hydrometeorology/storm-gap-boundary-policy — tool.io

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