 Eisenhower had tentatively selected 5 June as the date for the assault.However, on 4 June, conditions were clearly unsuitable for a landing; high winds and heavy seas made it impossible to launch landing craft, and low clouds would prevent aircraft from finding their targets.By the evening of 4 June, the Allied meteorological team, headed by Group Captain James Stagg of the Royal Air Force, predicted that the weather would improve sufficiently so that the invasion could go ahead on 6 June.