For most of the week, a large upper level low pressure system has been meandering northeast of the northern Bahamas. This area has a broad area of low pressure and most of the convection remains towards the east. Also, upper level winds have not been favorable for any tropical development. Over the next 24 hours or so, conditions will be marginal for any chance of surface low pressure to develop. After 24 hours, the upper level winds will become less hostile and a potential weakness in the high pressure area over the southeast United States will allow this area to begin moving west-northwest. Because of the proximity of this system to the east coast of Florida, everyone should stay informed throughout the weekend should any tropical development occur.
The attached visible satellite shows an upper level system with no indication of a surface low pressure at this time. The attached infrared satellite picture shows storm activity well to the east of the system as shearing winds continue to impact the area. The attached water vapor picture shows an abundance of dry air west of this system. This dry air is hindering any type of development towards the west. The problem today is that none of the forecast conditions indicating a west-northwest movement over the weekend have developed at this time. So, the steering currents cannot be clearly demonstrated with satellite pictures.
While conditions are only marginal for any tropical cyclone development in this area, it is important that everyone remained informed when something is this close to Florida. Even if this system does not develop a surface low pressure area, the broad upper level low will bring showers and thunderstorms to Florida on Sunday if the west movement forecast verifies in the next 24 hours. Many of the thunderstorm cells on Sunday will come from the Atlantic Ocean and move over the peninsula. Therefore, some of these cells may energized before moving over land and become strong thunderstorms. If you observe storm developing, assume severe weather may occur and seek appropriate protective areas.
Should any development occur with this area over the weekend, I will update this message immediately.
Nathan McCollum, C.E.M. Indian River County Emergency Management ---------------------------------------------- --Paul S.
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