Subtropical Storm Arlene (2017 - Bob's Scenario)

Subtropical Storm Arlene was the second Atlantic tropical or subtropical cyclone to form during the month of March on record. Forming from the tail end of a cold front, Arlene peaked as a moderate subtropical storm over the western Atlantic Ocean at a time of year nearly unprecedented for Atlantic subtropical or tropical cyclones.

Meteorological History
On March 25, disorganized showers and thunderstorms began to develop northeast of Hispaniola. Late that evening, the National Hurricane Center (NHC) began monitoring the system for possible subtropical or tropical development. A surface low pressure system formed early the next day. The low pressure system acquired sufficient organization to be designated Subtropical Storm Arlene at 00:00 UTC on March 27 while located east of the Bahamas. This made Arlene only the second subtropical or tropical cyclone to form in the Atlantic during March, and the first March Atlantic system to receive a name.

Arlene strengthened slightly over the next several hours as it moved slowly to the north-northeast, peaking at 00:00 UTC on March 28 with winds of 50 mph and a minimum pressure of 1003 mbar. Arlene maintained this intensity until it transitioned into an extratropical low at 12:00 UTC on March 28 when it was south of Bermuda. The extratropical low continued moving to the east-northeast before dissipating west of the Azores late on March 30.