99L is right up against that upper trough along 55w. that trough is currently digging with a max moving sw to the w of 99L... which is moving wnw. the convection should continue firing to the north due to the diffluence on the ne flank of the max on the the upper trough.. as it gets around to the north it will be in a 'lull' tomorrow... a consolidation window. after that it'll be moving west of the upper trough with northerly shear that steadily lightens up. 99L only has to survive about 12-18 more hours of shear before things start to improve. it had better rip it up and kill it now.. else this thing will be entering a development window.
HF 0808z16july