Cloud base estimates use the Lifting Condensation Level (LCL) — a theoretical altitude where rising surface air would condense. This does not confirm clouds exist at that height.
Do not rely on this estimate when:
In stable or inverted conditions, the LCL becomes irrelevant and will routinely predict a "cloud floor" where no cloud can form. Always verify with current METARs, TAFs, or PIREPs before flight.
Mathematical Approximation Only. All outputs produced by this tool are mathematical approximations derived from surface observations. They are not certified weather forecasts, aviation weather products, or official meteorological guidance of any kind.
Accuracy Limitations. Results do not account for real-time atmospheric dynamics, terrain effects, air mass instability, frontal boundaries, or any other condition affecting actual cloud formation. Atmospheric conditions change rapidly and without warning.
No Liability. The developer and all associated parties expressly disclaim all liability — direct, indirect, incidental, or consequential — arising from any use of, or reliance upon, outputs generated by this tool. Use is entirely at your own risk.
Pilot in Command Responsibility. The pilot in command bears sole legal and operational responsibility for all preflight weather assessment and all in-flight decisions. No output from this tool relieves the pilot in command of that responsibility.
Not a Substitute for Official Products. This tool does not replace — and must never be used as a substitute for — official METAR, TAF, PIREP, SIGMET, or National Weather Service (NWS) forecasts and advisories. Consult official sources before every flight.
By using this tool, you acknowledge these limitations and accept full personal responsibility for any decisions made based on its outputs.