Description
Calculate missing duration as a fraction of a supplied storm observation period.
Weather accumulation records need explicit reset, carry, observation-time and area-weight conventions. Trace or missing precipitation differs from measured zero, and radar dBZ must be converted to a linear basis before a linear reflectivity mean. Supplied density, timing and weighting terms do not create a forecast or verify actual weather conditions.
Calculate missing duration as a fraction of a supplied storm observation period.
When to use this tool
Use Storm Total Missing Interval Fraction when you already have missingDuration, stormObservationDuration and need to calculate missing duration as a fraction of a supplied storm observation period.
How to use the tool and how it works
- Enter missingDuration, stormObservationDuration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read fraction, remainder. Use the output convention below.
Require total duration>0 and missing duration within total; return missing/total and total-missing.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| missingDuration | Missing Duration | Required. Finite number; minimum 0. |
| stormObservationDuration | Storm Observation Duration | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| fraction | Fraction | Required. Finite number. |
| remainder | Remainder | Required. Finite number. |
{
"input": {
"missingDuration": 30,
"stormObservationDuration": 120
},
"output": {
"fraction": 0.25,
"remainder": 90
}
}Limitations and assumptions
- Durations need matching units; no precipitation amount is imputed and observation completeness does not establish storm accuracy.
- 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
Review the original gauge/radar series, clock and accumulation metadata, including resets and missing intervals. Use the complete spatial or process model for basin precipitation, snow or forecasting; local depth contributions and reference gaps do not infer unobserved weather.
References
Similar or alternative tools
- Storm Inter Event Gap
Separate storm events under a supplied inter-event gap rule.
- Tippingbucket Siphon Reset Count Adjustment
Add a supplied lost-tip count to a recorded rain-gauge tip count.