Upslope Fog LCL Height Checker
Actual along-parcel upslope lift versus independently same-parcel LCL, not temperature-depression LCL formula renamed or observed fog certainty. 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
A parcel lifted upslope can be compared with its independently established lifting condensation level.
A parcel lifted upslope can be compared with its independently established lifting condensation level.1
A signed lift margin describes that comparison without proving fog occurred.
When to use Upslope Fog LCL Height Checker
Use this tool to calculate or review the supplied observations under the stated rules. Match the observation method, units, averaging period and independently established reference.
How to use Upslope Fog LCL Height Checker and understand its results
- Match the observation method, units, averaging period and independently established reference.
- Enter observedUpslopeLiftM, independentlyComputedLocalLclAboveStartM, using the field meanings and rules below, then run the tool.
- Read signedLiftLclMarginM. Inspect nested result fields where present, and review unknown records separately from known matches.
- 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 |
|---|---|---|---|
| observedUpslopeLiftM | Observed upslope lift m | number | Required |
| independentlyComputedLocalLclAboveStartM | Independently computed local lcl above start m | number | Required |
Require both observed lift and same-parcel LCL above the starting point nonnegative. Return lift−LCL; zero is an exact match and negative is short of the supplied level.
margin=observedLift−LCL Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| signedLiftLclMarginM | Signed lift lcl margin m; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"observedUpslopeLiftM": 400,
"independentlyComputedLocalLclAboveStartM": 500
},
"output": {
"signedLiftLclMarginM": -100
}
}Limitations and assumptions
The observations and reference conditions must be independently established. This result is a record summary or stated model screen, not an official warning or a validated event forecast.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite.
Alternative or Complementary methods
For a related step, use Steam Fog Evaporation Mixing Checker: Steam fog involves moisture exchange and mixing between warmer water and colder air. For a complementary comparison, use Warm Front Overrunning Precip Type Lookup: Overrunning precipitation type depends on a matched atmospheric profile, including conditions above the surface.
References
-
Upslope Fog LCL Height Checker — tool.io
Similar or alternative tools
- Steam Fog Evaporation Mixing Checker
Steam fog involves moisture exchange and mixing between warmer water and colder air.
- Warm Front Overrunning Precip Type Lookup
Overrunning precipitation type depends on a matched atmospheric profile, including conditions above the surface.