OTL, there was serious bad weather, such that the Allies called off the landings on 5 June. The Germans thought the weather was too bad for the Allies to do anything, so they cancelled air and naval patrols, and Rommel went off to Germany for his wife's birthday.
The weather cleared by the morning of 6 June - which the Allies knew to expect and the Germans could not. The result was that the Germans were taken by surprise. (Remember the scene in The Longest Day: Major Pluskat looking out from his bunker at the misty seas - and suddenly there are hundreds of ships approaching?)
WI that the weather had been clear all along? The Allies had air supremacy over the Channel, but even so they could not prevent a few German recon planes sneaking out to take a look. Nor could the Allies have shut down German coastal patrols.
There was some degree of alarm among the Germans - the heavy bombing of coastal positions, the alert to the Maquis, the dummy paratroopers - but nothing definite.
How does D-Day play out if the Germans know the Allies are coming, hours in advance?
The weather cleared by the morning of 6 June - which the Allies knew to expect and the Germans could not. The result was that the Germans were taken by surprise. (Remember the scene in The Longest Day: Major Pluskat looking out from his bunker at the misty seas - and suddenly there are hundreds of ships approaching?)
WI that the weather had been clear all along? The Allies had air supremacy over the Channel, but even so they could not prevent a few German recon planes sneaking out to take a look. Nor could the Allies have shut down German coastal patrols.
There was some degree of alarm among the Germans - the heavy bombing of coastal positions, the alert to the Maquis, the dummy paratroopers - but nothing definite.
How does D-Day play out if the Germans know the Allies are coming, hours in advance?