A cold front moved off the United States East coast on Tuesday. This front quickly weakened as it entered the extreme western Atlantic; lingering over the Southeastern United States. A wave of low pressure developed along the front in Georgia and has since pushed the front further off shore. With the front stalled to the west of Bermuda for so long, deep tropical moisture on a southerly flow has moved into the area around the western flanks of the Bermuda-Azores ridge of high pressure, with dew points reaching the mid-upper 60s.
The low should continue moving eastward, towards Bermuda, but not deepen too significantly. Strong, gusty southerly and southwesterly winds ahead of the front are already moving into Bermuda’s western marine area. The actual front should cross the island in the early morning hours on Friday. Some thunderstorm activity is possible ahead of and along the front, these thunderstorms may contain gusty winds and heavy downpours.
After the front passes, much less humid and slightly cooler air will start to filter in on moderate to strong northerly winds. See this page for any official advisories, watches, or warnings from the Bermuda Weather Service.High pressure will begin to move in and keep the weather relatively settled for the weekend.
Elsewhere, in the Atlantic, there is a surface low developing as it interacts with an upper level low east-northeast of the Virgin Islands. This may need to be monitored for possible sub-tropical development down the road. However, it probably will not affect any land directly should it develop into a sub-tropical cyclone. The next name on the 2012 Atlantic Hurricane Season names list is Valerie.
In the Southwest Pacific, Severe Tropical Cyclone Evan is completing a loop through Samoa as a category three equivalent cyclone with 115mph (1-minute) sustained winds. Serious damage has been reported in Samoa after the storm made landfall, reportedly produced a 10-15′ storm surge.