AlphaToOmega wrote:I would say this is already a tropical cyclone. It has a closed low.
The most recent
NHC Surface Analysis still has Invest 90L somewhat connected to the front that extends off to its NE. As NDG mentioned, the ASCAT pass that occurred roughly 10 hours ago still showed the circulation to be broad in nature, and more of a surface axis that stretches from the WSW to the NNE. Early-morning visible imagery does show a decently-defined circulation in the lower-level clouds, but it's entirely possible that it's not closed/circular, and it's still attached to that front as previously mentioned.
Regardless, we should hopefully have recon flying out this afternoon to investigate the area, so we should have more concrete answers on the current status of 90L then. We should also hopefully have another round of ASCAT passes before that flight takes off.