The first two days of the Wimbledon Championships featured unseasonable warmth with a good deal of sunshine.
High temperatures on Monday and Tuesday climbed to around 77 F (25 C). The normal high in London during this time of the year is near 21 C (70 F).
Tennis Channel analyst Justin Gimelstob stated, "The warmer weather translates to faster conditions due to lighter air and the ball moving through the air quicker."
"When the weather is warm, especially for long stretches, the courts get harder and the balls bounce higher creating a dynamic where the ball picks up speed upon contact with the court surface," according to Gimelstob.
A large area of high pressure remains centered west of the United Kingdom, forcing any stormy weather to the north and east of London through Wednesday.
It will be several degrees cooler on Wednesday, but still seasonably warm with partly sunny skies.
The area of high pressure will shift southward on Thursday as a storm system approaches from the west. Dry weather will prevail on Thursday, but rainfall is expected to arrive Thursday night.
Andy Murray of Britain kisses the trophy as he poses for photographers after winning against Novak Djokovic of Serbia in the Men's singles final match at the All England Lawn Tennis Championships in Wimbledon, London, Sunday, July 7, 2013. (AP Photo/Anja Niedringhaus, Pool)
This storm system will then continue to bring the threat for rain to the London area on Friday and Saturday. While the precipitation will not be continuous, any rainfall from Friday into Saturday could be enough to cause delays on the outside courts.
The weather looks to remain unsettled at times during the second week of play as a slow-moving storm system continues to spin over the region.
The greatest threat for rainfall during the second week of play appears to be during the second half of the week and could have an impact on the semi-finals and finals.
Even though the Centre Court roof will keep matches going through any adverse weather, this also creates a different environment for players.
Gimelstob noted "When the roof closes, Wimbledon becomes an indoor event with a completely controlled environment, no sun, nor wind which favors the more aggressive player."
Unsettled weather for the extended Labor Day weekend will be across the Southeast, Upper Midwest, northern Rockies and the Four Corners.
The combination of moisture from Erika and a non-tropical system will drench areas from Florida to the South Carolina coast through the middle of the week.
A stormy weather pattern will prevail through September across much of southern South America.
A rapid shutdown of tropical activity and an end to hurricane season in early September is not likely this year, despite a strong El Nino.
Tropical Depression 14-E is several hundred miles southwest of Mexico and is expected to strengthen slowly into a tropical storm.
Heat will be erased by an autumnlike air mass across parts of northern Europe.