Only two weeks remain in the Atlantic hurricane season, but the hurricane season of 2009 is effectively over. While the Western Caribbean is still warm enough to support development of a hurricane--as it is year-round--wind shear over the entire North Atlantic has risen to levels prohibitively high for tropical storm formation to occur. Wind shear is forecast to remain very high for at least the next ten days (Figure 1). This is a fairly typical occurrence in the At
Weather Underground Forecast for Tuesday, November 17, 2009.
A strong storm affecting the British Isles will rise northeastward toward Scandinavia on Tuesday. As the system exits the region, wrap-around flow will spark scattered rain showers across the northernmost regions of the United Kingdom. Meanwhile, strong winds and moist onshore flow associated with this will spread into the Scandinavia Peninsula and yield to fairly widespread mixed precipitation development in southern Norway and and Sweden.
Behind this system, another area of low pressure from the North Atlantic Ocean will push into the British Isles during the latter half of the day, bringing another round of light showers and blustery winds to the region. Expect little change in daytime temperatures across the British Isles and the Scandinavia Peninsula. London will rise into the mid-50s(F)/lower 10s(C), while Oslo will rise into the upper 30s(F)/mid-0s(C).
In the mainland, a small and potent area of low pressure will slam across the Portugal coast with significant rainfall early Tuesday morning. The system will lift northeastward through the day, bringing light to moderate showers to northern Spain, western France, Belgium, and Germany. A slow moving disturbance in northern and eastern Europe will also trigger additional showers from Germany through Romania.
France will see temperatures in the upper 50s(F)/mid-10s(C), while Berlin will rise into the mid-50s(F)/mid-10s(C).
Central and southern Europe will see dry and calm weather on Tuesday as a building ridge of high pressure from northern Africa keeps stormy weather to the north.
Barcelona will see temperatures in the lower 70s(F)/lower 20s(C), while Athens will rise into the upper 60s(F)/lower 20s(C).
Hurricane warnings were in effect for Puerto Rico and the Virgin Islands on this date in 1999 as Hurricane Lenny threatened the islands. Lenny packed winds of 115 mph and was not only unusual because it was so late in the season. It was also unusual because it moved west to east across the Caribbean, making it the first hurricane to approach Puerto Rico from the west.