Earth Science & Energy
Convective Inhibition (CIN) Severe Thunderstorm Cap Sizer
Calculate convective inhibition (cin) severe thunderstorm cap using the stated engineering or scientific relationship and adjustable field inputs.
Preparing your result…
What this calculator does
Calculates Convective Inhibition (CIN) Severe Thunderstorm Cap Sizer using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Signed uniform-layer energy ≈ g × Δz × (Tv,parcel − Tv,env) ÷ Tv,env (J/kg); negative = inhibition
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Uniform negative-buoyancy layer signed energy≈gΔz(Tvp−Tve)/Tve, in J/kg using K and m; result is negative. A positive inhibition magnitude is the negative of the signed integral.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • State sign convention and integration bounds. A mean-temperature/depth illustration is not full sounding-derived CIN; need parcel and environmental profiles through the LFC and a selected algorithm. Do not present it as a calibrated thunderstorm-cap prediction.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Layer-mean parcel virtual temperature (K) | Layer-mean environment virtual temperature (K) | Depth of the negative-buoyancy layer (below the LFC) (m) | Illustrative layer CIN (signed) |
|---|---|---|---|---|
| Worked example | 292 | 294 | 500 | -33.356 J/kg |
| Half the amounts | 180 | 180 | 250 | 0 J/kg |
| Double the amounts | 330 | 330 | 1,000 | 0 J/kg |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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