TS Ernesto has developed rather deep convection tonight right over the center of circulation. You can plainly see this improvement in structure on various satellite imagery. The question is, will this be a temporary stay of execution before the inevitable happens and it’s ripped up or are we seeing the start of a significant intensification process? Wish I knew. This part (intensity forecasting) is the toughest aspect of tracking tropical cyclones. So many factors are at play and it is impossible for today’s computer models to grasp the totality of the complex nature of the inner core. So, we can only sit back and watch sat pics as they refresh, giving us another frame to the movie, quite literally. Of course, it helps to have recon out there as well but when none are flying, the eye in the sky, some 22,500 miles above the Earth, is how we watch these systems wax and wane. And tonight, it appears that Ernesto is on the up-tick, how long it lasts remains to be seen.
Meanwhile, out in the far eastern Atlantic, we now have tropical depression six. The NHC began advisories a little while ago and this too will have to be watched as it begins the long trek across the tropical Atlantic. There are some hurdles along its route but conditions seem to be a little more favorable than perhaps was earlier thought this year across the deep tropics and we may see quite a pattern coming up of several developments over the coming weeks.
As for 91L, the disturbance off the Florida coast, while it looks rather impressive on satellite imagery. it still lacks a well defined surface low and without that, it won’t develop much. However, these tropical disturbances can dump a lot of rain and bring gusty winds with any rain squalls that move over your area. Be aware of that this weekend across SE Florida. While there is a chance of further development, I do not see this system becoming a big problem for anyone outside of the heavy precip that is possible.
I’ll have regular updates throughout the weekend with frequent posts on Twitter and Facebook. I’ll also keep adding video blogs to the newly released HurricaneTrack iPhone app. Check it out in the App Store via the banner ad up on the top right column.