ulalaunch
The forecast from the Space Force's Space Launch Delta 45 weather squadron for Wednesday night's launch of Atlas V indicates a 95 percent chance of acceptable conditions.
"High pressure will bring fair weather to the Space Coast on both the primary and backup days. For the primary window, a ridge axis over Central Florida should mean light, onshore winds and partly cloudy skies," the weather team says.
"There is a small threat of violating the Cumulus Cloud Rule, with the threat being slightly higher on the backup day."
The operations forecast for the 44-minute launch window that opens at 10:24 p.m. EST (0324 UTC) includes just a few clouds around, good visibility, southeasterly winds 5 to 10 knots and a temperature near 70 degrees F.
If the launch moves to the backup opportunity on Thursday for some reason, there is a 90 percent chance of meeting the weather rules.
"By the backup day, expect slightly breezier onshore winds," the weather team says.