Eyewall Replacement Cycle Duration Lookup
Observed independently defined eyewall-cycle duration compared with caller matched storm-family reference, not predicted completion. Exact caller verified numeric reference; signed deviations retained. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
Eyewall replacement durations depend on how the cycle's beginning and end are defined.
Eyewall replacement durations depend on how the cycle's beginning and end are defined.1
Compare observed hours only with a reference using the same event definition. The tool retrieves your supplied numeric reference and reports a signed observed-minus-reference difference.
When to use Eyewall Replacement Cycle Duration Lookup
Use this tool to compare an observation with its exact numeric reference. Establish the observation method, units, averaging period and applicable reference or calibration.
How to use Eyewall Replacement Cycle Duration Lookup and understand its results
- Establish the observation method, units, averaging period and applicable reference or calibration.
- Enter callerVerifiedEyewallDurationHoursKeys, callerVerifiedEyewallDurationHoursValues, queryEyewallDurationHoursKey, observedEyewallDurationHoursValue, using the field meanings and rules below, then run the tool.
- Read callerReferenceValue, signedObservedMinusReference, using the output meanings and calculation rules below. Confirm that the exact matched record is the one whose source and context apply.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerVerifiedEyewallDurationHoursKeys | Caller verified eyewall duration hours keys | list of string | Required |
| callerVerifiedEyewallDurationHoursValues | Caller verified eyewall duration hours values | list of number | Required |
| queryEyewallDurationHoursKey | Query eyewall duration hours key; use the exact reference token or coordinate domain stated below | string | Required |
| observedEyewallDurationHoursValue | Observed eyewall duration hours value | number | Required |
Supply nonempty aligned unique nonblank reference keys and finite reference numbers. Query one exact existing key and provide a finite observation in the same units. Return the matched number and observed-minus-reference; signed inputs are accepted and no special physical range is inferred. Unknown keys fail.
reference=values[indexOf(keys,query)]; difference=observed−reference Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerReferenceValue | Caller reference value | number |
| signedObservedMinusReference | Signed observed minus reference; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"callerVerifiedEyewallDurationHoursKeys": [
"a",
"b"
],
"callerVerifiedEyewallDurationHoursValues": [
2,
4
],
"queryEyewallDurationHoursKey": "b",
"observedEyewallDurationHoursValue": 5
},
"output": {
"callerReferenceValue": 4,
"signedObservedMinusReference": 1
}
}Limitations and assumptions
The observations and reference conditions must be independently established. This result does not supply missing measurements, uncertainty or an official warning. Reference records and their claimed verification are supplied by the caller; the tool does not retrieve or verify them.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.
Alternative or Complementary methods
For a related step, use Saffir Simpson Category From Wind Lookup: The Saffir–Simpson scale categorizes hurricane wind intensity using maximum sustained one-minute winds. For a complementary comparison, use Record vs Normal Spread Z Checker: A standardized anomaly expresses an observation's departure from a reference mean in units of reference standard deviation.
References
Similar or alternative tools
- Saffir Simpson Category From Wind Lookup
The Saffir–Simpson scale categorizes hurricane wind intensity using maximum sustained one-minute winds.
- Record vs Normal Spread Z Checker
A standardized anomaly expresses an observation's departure from a reference mean in units of reference standard deviation.