There is a lot going on, no doubt about that. It’s the end of August and the hurricane season is kicking in to high gear. Let’s start in the Pacific actually then move east from there…
TS Madeline/Hurricane Lester
We have a pair of tropical cyclones to watch closely in the east and central Pacific over the coming days. First up is tropical storm Madeline which is currently situated well to the east-southeast of Hawaii. The forecast calls for the storm to reach hurricane intensity as heads generally westward early next week. While the track suggests a threat to Hawaii, it seems as though less favorable conditions will set in and Madeline will weaken and probably push more south with time, avoiding a direct impact to the islands. However, as we know, this can change so it’s obviously a good idea to keep tabs on the progress of this storm.
Much farther to the east over the eastern Pacific we have hurricane Lester with 100 mph winds. It too is tracking almost due west and could reach the vicinity of Hawaii in about a week. It is something to monitor but remember, it is very difficult for hurricanes to make landfall in Hawaii from the east. We usually see hurricane threats from the south as they turn from lower latitudes and track northward across the region, such as Iniki did back in 1992. While Lester is a strong hurricane, I would not worry too much about it right now – plenty of time to watch.
Next we have good ole 99L. Seems like it has been with us forever. The area of interest that just can’t seem to develop. So far, it still hasn’t and doesn’t look like it will anytime soon. Upper level winds continue to plague the would-be storm, pushing any deep thunderstorms that try to develop away from the low level center which is currently moving through the Florida straits and Keys area.
It has been a frustrating week tracking 99L with all of the computer model flip-flopping that we’ve had to deal with. About the only one that has been consistent with intensity is the hurricane specific HWRF model which goes bonkers with development on almost every run. So far, none of that has come to pass. The GFS has done fairly well indicating little development thus far and not much more to speak of in the days ahead. The Euro or ECMWF on the other hand has gone back to suggesting a hurricane threat for Florida and possibly the Southeast coast once the system moves back out over the Atlantic.
My feeling is that so far the system has under-performed and until the shear relaxes and we see deep convection wrapping around the low level center and maintaining for 24 hours or more, it won’t pose much of a threat as far as being a strong hurricane. That being said, it is possible that 99L could reach hurricane intensity somewhere in the Gulf of Mexico next week. Water temps are very warm and all it takes is a period of favorable upper level winds for the lid to come off.
I believe the next 24-48 hours is the key here. If we see it develop by Tuesday then folks in Florida could be in for some significant impacts from this system. Unfortunately we will just have to wait and see how things pan out. For now, it remains only a strong tropical wave of low pressure, nothing more.
Next we have invest area 91L between Bermuda and Cape Hatteras and moving westward with a turn more to the west-northwest expected soon.
Right now, strong upper level winds coming from the east are keeping the convection that has managed to develop just west of the well defined low level center. You can clearly see this on the satellite image I have posted here. In fact, this looks to me like it would be classified as a tropical depression but without recon in there to verify right now, it’s not officially anything but an area of interest. We should know later today once the recon crew gets in there – perhaps this becomes TS Hermine? We shall see.
The models are in pretty good agreement that this will turn more to the north and then curve back out over the Atlantic over the next couple of days. The key to any appreciable impacts to the North Carolina coast will be how close the system tracks before doing so. Most of the guidance keeps it just east of Cape Hatteras and vicinity but close enough to warrant concern, especially for off-shore boating interests.
I’ll keep a close eye on this one since recon is planning to investigate later today. Once we get their reports we will know if this has in fact become a next named storm or at least a tropical depression.
Gaston has become the strongest hurricane in the Atlantic Basin for 2016. Top winds are near 90 mph and are forecast to go up from there. The hurricane has developed an eye and is moving away from all of the hostile conditions that were hindering significant development over the past day or so.
The NHC is forecasting Gaston to reach peak intensity of 110 mph before reaching cooler water later this week. I won’t be at all surprised to see the hurricane reach 120 mph or more over the warm water of the sub-tropics. This seems to be the norm in recent years – hurricanes reaching peak intensity well outside of the deep tropics. Fortunately for land areas, Gaston will only be tracking over open ocean.
Future 92L in the far eastern Atlantic
A well developed tropical wave over interior Africa is forecast by all of the global computer models to move in to the eastern Atlantic and develop over the next five days. Conditions appear to be favorable across the entire swath of ocean this time around and we just might have something to track for days on end.
There is no doubt going to be a lot of talk about this system because the steering pattern looks to be one that could allow it track all the way to the United States. While this is a possibility, it is so far out in time that worrying about a specific location is pointless. Conditions appear to be favorable so let’s just watch and see what happens over the course of the week ahead and go from there. We have plenty of other issues to deal with on the west side of the Atlantic to keep us busy for a while longer.
I’ll post an update here later this afternoon or early evening once we get more info from the recon crew concerning 91L. I don’t think much will change with 99L today but if there is, I’ll certainly update that as well.
M. Sudduth 10:10 AM ET Aug 28