CFT - L-1 Day

A large area of high pressure off the Carolina coast will continue to bring mostly dry, easterly winds today. Coastal showers may linger nearshore overnight tonight and into the early morning hours, with a few occasionally clipping the Spaceport. A mid-level trough will begin to approach the Deep South tomorrow, causing weak steering winds to begin shifting westerly. Atmospheric moisture will also begin to increase. The sea breeze boundary should develop near the time of the launch window, possibly triggering cumulus clouds that pose a risk, but the threat appears low as most convective development should occur after the launch window. By the backup day, the ridge is expected to be positioned over the spaceport with westerly flow prevailing. Although this will increase the threat of afternoon thunderstorms, the early launch window should mean the threat of a weather violation low. The Cumulus Cloud Rule remains the primary concern.