Any development of 91L will likely be non-tropical in nature. Wind shear will be too strong across the eastern GOM to permit tropical development, but a weak baroclinic low pressure system looks like a good bet. Here is part of the forecast discussion from the NWS Tampa/Ruskin earlier today:

.LONG TERM (THU NIGHT-TUE)...MODELS BEGINNING TO COME IN BETTER
AGREEMENT WITH GULF SYSTEM TO BEGIN THE EXTENDED PERIOD. DEEP UPPER
LOW FROM S PLAINS INTO THE MID MISS RV VALLEY WITH SW FLOW OVER THE
GULF AND FLORIDA AS SERIES OF SHORT WAVES/VORT MAXES ROTATE OVERHEAD
IN UPPER FLOW. WEAK BAROCLINIC/NON TROPICAL/COLD CORE LOW EXPECTED
TO FORM IN S GULF ALONG OLD FRONTAL BOUNDARY TO LIFT NNE WARD. WARM
FRONT ASSOCIATED WITH THIS LOW TO MOVE OVER THE SOUTHERN HALF OF THE
FL PENINSULA THU NT THEN NORTH HALF FRI WITH HIGH END CHANCE POPS
WITH MOSTLY CLOUDY CONDITIONS THU NT-FRI AND MAY NEED TO INCREASE
POPS AS WE GET MORE CONFIDENT IN THIS SCENARIO. AROUND 1012MB LOW
AND COLD FRONT WITH THIS SYSTEM TO BE PUSHED OVER THE AREA FRI NT
INTO SAT WITH POTENT VORT MAX. COULD SEE SOME STRONG STORMS WITH THE
ENTIRE SYSTEM WITH SIGNIFICANT UPPER DYNAMICS AND LOW LEVEL BOUNDARY
CONVERGENCE.