South Florida and Keys hit with possible STS

[Jr0d]

Last night, the 31st of January, the Florida Keys and South Florida was hit by an intense line of storms that appeared to have a closed low and obvious spin on radar and satellite. This system prompted countless special marine warnings, several severe thunderstorm warnings and at least one tornado warning. The center made land fall at the tip of South Florida.

I will upload the satellite loop shortly. Unfortunately I did not save the radar loop from when it made landfall.

It appeared to start out as a cold front line and developed a closed low and appears(in my amateur eyes) to have separated from the associated cold front. I would like some expert opinions on this system.

[Jr0d]

[Jr0d]

Better detail, but shorter loop:

[Jr0d]

The NWS Key West posted satellite and radar loops from the system on Facebook. Unfortunately im unable to save them.

https://m.facebook.com/pg/NWSKeyWest/videos/

[HurricaneBelle]

it was an MCV, not a STS

[HurricaneEnzo]

it was an MCV, not a STS

Definitely a cool feature and thanks for bringing it to out attention but I agree with HurricaneBelle . This is an MCV not any sort of tropical entity.

[Patrick99]

I feel like that was similar to the MCS blobs we sometimes get that form in the Gulf and track over the peninsula, usually in March-April.

[CrazyC83]

It definitely wasn't a tropical system. It was a mesoscale convective system, the type normally seen in the Plains in the spring and summer. They are just unusual in Florida since there isn't sufficient forcing.