NASA Crew-12 - L-1 Day

Forecast Discussion: Favorable weather conditions are expected at the launch site for tomorrow morning’s attempt. Today, a weak cold front will approach East Central Florida from the north, increasing moisture and shower chances in the afternoon. By tonight, the front will dissipate and stall out just south of the Spaceport, leading to isolated showers over the Atlantic waters. Although most of the shower activity will remain offshore, there is a low chance of a Cumulus Cloud Rule and/or Flight Through Precipitation violation if one of these showers makes it to the coast. Beyond the launch site, the main watch item is elevated wind speeds along several areas of the ascent track. Over the weekend, another low will develop over the central US and drag a cold front into the Southeast. On Sunday morning, southeasterly flow ahead of the front will bring isolated coastal showers in addition to a low Thick Cloud threat due to cirrostratus clouds streaming in from the west. While there is still uncertainty in the exact timing, the front is expected to move through the region Sunday night into Monday morning, leading to an elevated risk of multiple weather constraints for the second back-up day. Ascent track conditions will also deteriorate as the low moves into the Atlantic.