Why wasn't there more fighter aircraft strafing the beaches with close air support on Omaha beach on D-day?

Poor weather hampered some Allied air operations, but the biggest issue was interoperability between the US Services. Naval bombardment was lobbing shells the equivalent of freight trains at 2000 feet altitude over the beaches, which made it difficult for fighter-bombers to drop down and strafe...Things were so confusde on the beachhead that little coordination was made between Air and Naval assets.