At 24/0025Z, NHC issued a Special Tropical Weather Outlook on Invest 90L and stated a moderate chance (30 percent) that the system could develop into a subtropical or tropical system by Tuesday evening. The system is expected to move slowly to the north northwest and over the past 24 hours the center of the weak low-level circulation has drifted anywhere from the west southwest to the north. Moderate southerly wind shear has prevented convection from developing over the center, however this shear is expected to be on the decline by Tuesday morning. A blocking ridge to the north should limit any significant northward movement for a few days.
ED