Starlink 4-17 - L-1 Day

A hot and sunny day is in store for the Spaceport as high pressure ridging dominates our weather pattern. Showers will be harder to come by than yesterday, but a few may form along the east-coast sea breeze as it pushes inland this afternoon. By tomorrow morning, a mid-latitude storm system will move through the Mississippi Valley and push the high pressure ridge farther to our east. This will cause our winds to shift to the south-southwest and offshore, which will squash any chance of a coastal shower during the primary launch window. Aside from possible wind shear aloft, the weather looks excellent for a launch attempt Friday morning, with the Cumulus Cloud Rule being the only concern. Conditions change for the backup window Saturday morning as a cold front begins to approach and dig into the Deep South. Local wind flow becomes more southwesterly in nature and increases to near 20 mph, and moisture rises across the spaceport. Higher cloud coverage and isolated showers will be in the forecast for Saturday, but the weather looks decent for the backup launch window, with the Cumulus Cloud Rule and Thick Cloud Layer Rule being the main concerns.