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Why was convection triggering?
Conditions associated with “swap points”
- Consider shallow Cu after failing deep Cu test (involves cloud-avg thermodynamics)
- Deep Cu top at the highest level of positive parcel buoyancy (based only on temperature)
- Limited checks on parcel instability within the cloud layer
- Cloud top determined by vertical relative humidity (RH) gradients (more difficult when there are no well-defined dry, stable layers)