Description
Return vector wind speed and a supplied calm-policy flag.
Atmospheric vectors and coordinates use explicit reference directions, height datums and missing/calm conventions. A meteorological from-bearing differs from a velocity-to direction; a normalized label or corrected coordinate does not constitute an actual observation or a forecast.
Return vector wind speed and a supplied calm-policy flag.
When to use this tool
Use Wind Component Calm Flag when checking the stated wind-direction, vector or vertical-reference convention.
How to use the tool and how it works
- Enter eastward, northward, suppliedCalmThreshold, equalityCalm. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read speed, calm. Inspect calm before interpreting the associated values.
Return vector wind speed and a supplied calm-policy flag. Require calm threshold >= 0; speed = hypot(eastward,northward), calm uses <= when equalityCalm and < otherwise.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| eastward | Eastward | Required. Finite number. |
| northward | Northward | Required. Finite number. |
| suppliedCalmThreshold | Supplied Calm Threshold | Required. Finite number; minimum 0. |
| equalityCalm | Equality Calm | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| speed | Speed | Required. Finite number. |
| calm | Calm | Required. Boolean. |
{
"input": {
"eastward": 3,
"northward": 4,
"suppliedCalmThreshold": 5,
"equalityCalm": true
},
"output": {
"speed": 5,
"calm": true
}
}Limitations and assumptions
- Threshold and component reference frame are supplied; no observed conditions, forecast or safe operating decision is verified.
- 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
Use verified observations and documented station/vector conventions with an appropriate complete meteorological analysis for actual weather or operational decisions.
References
Similar or alternative tools
- Wind Direction Calm Undefined Token
Return normalized supplied direction only above a calm threshold.
- Atmospheric Science: Wind Vector Meteorological Sign
Return wind velocity components from a meteorological from-bearing.