It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Tropical Depression Four formed in the Central Atlantic on Wednesday evening, but is struggling against dry air and is unlikely to survive long enough to threaten any land areas. At 11 am EDT Thursday, TD 4 was located about midway between the Cabo Verde Islands and the Lesser Antilles Islands, and was headed west-northwest at a speedy 21 mph.
Satellite images on Thursday morning showed that the circulation of TD 4 was weakening. The storm had a decreasing amount of thunderstorm activity, and the cloud tops of these thunderstorms were warming, showing that they did not extend as high in the atmosphere due to weaker updrafts supporting them. This weakening trend was likely due to dry air from the Saharan Air Layer (SAL), which had wrapped into the circulation center from the east. Wind shear was favorable for development, a light 5 - 10 knots, and sea surface temperatures (SSTs) were marginal for development, near 26.5°C (80°F)--about 1°F above the seasonal norm.
there is a brief opportunity for TD 4 to get its act together and become Tropical Storm Don. By Friday night, though, strong upper level winds out of the west will begin impacting the storm, bringing high wind shear of 15 – 25 knots through the weekend. The combination of dry air and high wind shear should be enough to destroy TD 4 by Monday.
originally posted by: scraedtosleep
We get them here all the time . Ive been through two that
destroyed my city. We have partys during them lol.
Everyone will hang out outside till the trees start coming down or
a power line snaps lol.
The next tropical cyclone threat in the Atlantic may well be a tropical wave expected to come off the coast of Africa on Saturday night.
Impressively, the 0Z Friday operational runs of both the GFS and European models showed this wave spinning up into a hurricane before reaching the Lesser Antilles Islands on Saturday, July 15. However, only two of the 70 ensemble members of these models showed a hurricane forming in their 0Z Friday runs, and only about 20% of the members of the European model ensemble predicted that the African wave would even develop into a tropical depression.
The wave is predicted to take a mostly westward track at about 20 mph, and emerge far enough to the south (9° - 10° N) so that dry air from the Saharan Air Layer should not greatly interfere with development. However, the wave will be too close to the equator to allow the system to gain much spin by leveraging the Earth's spin, and the fast forward speed of the system may slow development.