Low Level Wind Shear Alert Threshold Checker
Actual signed runway wind gains/losses against caller independently verified magnitude threshold, equality alerts; not live airport alert or aviation safety. 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
An along-runway wind change has a sign, while a magnitude threshold screens changes in either direction.
An along-runway wind change has a sign, while a magnitude threshold screens changes in either direction.1
Match the observation interval and runway projection to the intended alert procedure.
When to use Low Level Wind Shear Alert Threshold Checker
Use this tool to calculate or review the supplied observations under the stated rules. Establish the observation method, units, averaging period and applicable reference or calibration.
How to use Low Level Wind Shear Alert Threshold Checker and understand its results
- Establish the observation method, units, averaging period and applicable reference or calibration.
- Enter observedAlongRunwayWindChangesKnots, callerAlertMagnitudeKnots, using the field meanings and rules below, then run the tool.
- Read signedAlertReservesKnots, callerAlertIndices, using the output meanings and calculation rules below.
- 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 |
|---|---|---|---|
| observedAlongRunwayWindChangesKnots | Observed along runway wind changes knots | list of number | Required |
| callerAlertMagnitudeKnots | Caller alert magnitude knots | number | Required |
Enter finite signed along-runway wind changes and a strictly positive alert magnitude. For each change return threshold−absoluteChange. Return zero-based alert indices where absoluteChange is at least the threshold, including equality. An empty observation list returns empty lists.
reserve_i=threshold−|change_i|; alertIndices={i:|change_i|≥threshold} Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| signedAlertReservesKnots | Signed alert reserves knots; preserve the subtraction order and sign defined in the mechanics | list of number |
| callerAlertIndices | Caller alert indices; zero-based positions in the relevant supplied record or adjacent-pair list | list of number |
{
"input": {
"observedAlongRunwayWindChangesKnots": [
10,
-20
],
"callerAlertMagnitudeKnots": 15
},
"output": {
"signedAlertReservesKnots": [
5,
-5
],
"callerAlertIndices": [
1
]
}
}Limitations and assumptions
The caller supplies the threshold and valid runway observations. There is no built-in operational alert policy, temporal detection or warning issuance.
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 Microburst vs Macroburst Classifier: Microburst and macroburst labels concern the spatial extent of a downburst. For a complementary comparison, use DCAPE Downdraft CAPE Calculator: Downdraft CAPE represents integrated favorable downdraft buoyancy along an independently supplied parcel profile.
References
Similar or alternative tools
- Microburst vs Macroburst Classifier
Microburst and macroburst labels concern the spatial extent of a downburst.
- DCAPE Downdraft CAPE Calculator
Downdraft CAPE represents integrated favorable downdraft buoyancy along an independently supplied parcel profile.