[blueash]

Look SE, 9:58 PM instantaneous window means launch at that moment or cancel. Weather looks clear for tonight. From SpaceX website:

SpaceX is targeting Tuesday, March 9 for launch of 60 Starlink satellites from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida. The instantaneous window is at 9:58 p.m. EST, or 2:58 UTC on March 10.

The Falcon 9 first stage rocket booster supporting this mission previously supported launch of NASA astronauts Bob Behnken and Doug Hurley to the International Space Station, ANASIS-II, CRS-21, Transporter-1, and a Starlink mission. Following stage separation, SpaceX will land Falcon 9’s first stage on the “Just Read the Instructions” droneship, which will be located in the Atlantic Ocean. One half of Falcon 9’s fairing previously flew on the ANASIS-II and SXM-7 missions, and the other half previously supported launch of Sentinel-6A.