Looks like it will move into South America tonight before it has time to do anything. What about the system east of 91L would it have a better chance to form ? Here are a few early model runs on Invest 91L

http://my.sfwmd.gov/sfwmd/common/images/weather/plots/storm_91.gif

From TPC/NHC disco this morning...snipet...

TROPICAL WAVE IS ALONG 57W S OF 16N MOVING W NEAR 20 KT.
INVERTED-V LOW LEVEL SIGNATURE IS CLEARLY VISIBLE ON SATELLITE
IMAGERY. THE MIMIC-TPW ANIMATION SHOWS THE AXIS EMBEDDED WITHIN
A MOISTURE SURGE. AT THE CURRENT SPEED THE WAVE WILL BE NEAR THE
LESSER ANTILLES WED EVENING. ISOLATED MODERATE CONVECTION FROM
9N-13N BETWEEN 50W-57W.