Nadine is moving inland in Central America and Mexico, producing locally heavy rainfall.
Oscar is a micro hurricane north of Hispaniola bringing rough conditions to the Turks and Caicos Islands and perhaps the southeastern Bahamas and parts of Cuba.
Tropical Storm Nadine
Yesterday we noted that Invest 95L had a shot to become a depression or low-end tropical storm before moving into Central America today. That is indeed what happened, as Tropical Storm Nadine formed from the mess, and it is now moving inland.
Total rainfall from Nadine should be in excess of 12 inches (300 mm) in portions of Mexico. (NOAA WPC)
Nadine is primarily a rainmaker, and flash flooding is a good bet for portions of the Yucatan, Belize, and Veracruz and Oaxaca. No further strengthening is expected.
Hurricane Oscar
The Oscar for most surprising storm of the season goes to Oscar! Not only did we get a tropical storm out of Invest 94L, we got Hurricane Oscar.
Hurricane Oscar is a tiny, tiny storm with 80 mph winds. (Weathernerds.org)
Hurricane-force winds extend out a total of 5 miles from the center, while tropical storm force winds extend out about 45 miles. Oscar could best be described as a “microcane.” Still, those winds are bearing down on the Turks and Caicos Islands and moving toward the southeastern Bahamas. Widespread tropical storm and isolated hurricane conditions are likely with this as it passes through.
Oscar is expected to drift southwest-ward into or near Cuba by Monday before turning northeast out to sea. (NOAA NHC)
Nothing about Oscar is simple. Storms this small will periodically be big misses in the model world, underscoring the value of reconnaissance flights and other observational tools. Modeling completely whiffed on this yesterday and even up to this morning. This is another post for another day, but thankfully the forecast has been updated, and it now appears we have some solid footing on Oscar for folks in the Turks and Caicos and Bahamas, as well as in Cuba. At this point, no threat to the U.S. is seen, as wind shear is too high just west of here, something that should make Oscar grouchy early next week. Interests in Cuba and the southwest Atlantic should continue monitoring Oscar’s progress.
Invest 94L just north of the Caribbean islands is going to fall prey to epic amounts of wind shear in the southwest Atlantic this weekend, ending any low-risk development potential.
Invest 95L has a very narrow window through Saturday morning to organize before moving across land in Central America as a rainmaker.
The tropics look fairly quiet heading into next week.
Thanks to Eric for covering me this week while I underwent oral surgery for orthodontia. I’ll just say it’s about as glamorous as it sounds. Thanks to Methodist Hospital here in Houston for a good procedure and great quality care afterwards.
Let’s take a dip into the tropics.
Invest 94L’s last gasp
What is left of Invest 94L is moving just north of the Lesser Antilles and Puerto Rico today. This is a rather robust area of thunderstorms, but it lacks any organization.
Invest 94L is producing widespread thunderstorms mainly north of the islands on Friday afternoon. (Weathernerds.org)
Over the next couple days, 94L will continue westward over the next 24 hours or so before it’s completely enveloped by significant wind shear that has overtaken the Gulf of Mexico and southwest Atlantic. Wind shear is as high as 90 knots right now across Florida, which is completely inhospitable for tropical development and some of the strongest shear I’ve seen here this time of year. So, thanks for the memories, Invest 94L and we wish you well.
Invest 95L to dump rain on Central America
Meanwhile, Invest 95L is in a bit of a different situation. This disturbance is located off the coasts of Belize and Honduras this afternoon. It is also showing robust thunderstorm activity.
Invest 95L has a short window to become a depression or low-end named tropical storm before moving inland over Central America tonight. (Weathernerds.org)
This one has a much less hostile environment to develop in than Invest 94L to the north does. However, it has a key limiting factor: Time. Invest 95L has about 24 hours or less left over water before it moves inland across Belize and Central America. In that time, it could become a tropical depression or low-end tropical storm, but no further development would be expected. Still, heavy rainfall is likely in Central America this weekend from Invest 95L that could cause some flooding issues. There is a chance that the remnants of 95L merge with another Pacific disturbance to form a storm next week that rides westward away from Mexico. But beyond this weekend’s rainfall, 95L is not a threat to land.
Beyond the Invests
At this point, there is nothing to speak of in the tropics once 94L and 95L exit the picture. That’ll give us a few more days of rest here. There are signs that the tropics could get active again heading into November, but it’s important to note that as the Northern Hemisphere pattern begins to shift toward winter, the typical behaviors of tropical systems don’t always continue. We’ll touch more on this next week.
Invest 94L is in the middle of the central Atlantic, and has about a 50/50 chance to develop as it comes west this week.
Any development would likely be slow to occur and modest impacts to the Caribbean are possible by the weekend.
We anticipate that 94L would fall prey to copious amounts of wind shear in the southwest Atlantic and Gulf before it makes it to the U.S., and it is unlikely to ever be a serious threat to the Southeast.
No other noteworthy developments are expected.
Invest 94L: Worth watching, but not a very serious concern
The next disturbance we have our eyes on is Invest 94L, a tropical wave moving through the Atlantic right now. The NHC is giving this about a 50/50 shot at development over the next several days.
A tropical system has about a 50/50 chance to develop in the Atlantic over the next few days. (NOAA NHC)
If you live in Florida, at first glance, your stomach may sink, but in reality it is mid-October, not mid-August. Storms generally do not form here and long track their way to the United States. Also, it’s important to note that the hatched area is not the track of a nascent system but rather the area in which the system may develop. In other words, Invest 94L may develop somewhere in that orange hatched region. If it develops.
So over the next several days, Invest 94L will come westward.
Where is Invest 94L? It’s the little area of thunderstorms in the middle of the image. (Weathernerds.org)
For now at least, 94L is located in a pretty hostile area with lots of dry air surrounding it, and a bit of shear in the vicinity too. Over the next couple days, that may back off some, and that’s when 94L could make an effort to develop slowly. If there is a point where 94L has its best chance of developing, it’s probably in about 3 days as it approaches the northern Leeward Islands and perhaps the Virgin Islands and Puerto Rico. Again, development is probably going to be sluggish here, so we aren’t expecting a Milton or Helene-esque blast of rapid intensification or anything. But if you are in the islands or planning to visit the eastern Caribbean islands this weekend, it’s something you’ll at least want to monitor. Most modeling keeps the ceiling on 94L low as it moves into the islands.
From there, it’s going to be difficult to see Invest 94L making it much farther west while remaining intact. There is a wall of wind shear forecast to be over the Gulf and Southeast this weekend which would almost certainly shred 94L or whatever it is at that point (provided Hispaniola doesn’t get to shred it first). In other words, by the time we get later into the weekend or early next week, it’s difficult to think that this one remains a major concern.
Copious wind shear should do the job on 94L/Nadine eventually. (Tropical Tidbits)
So bottom line on Invest 94L: Watch it in the Caribbean. Keep tabs on it to the west. But in general, we do not believe this one will be a major issue at this time.
Elsewhere
There’s nothing else we really have our eyes on. We are seeing some periodic signs of Caribbean development from the GFS model in particular. That seems to have very limited ensemble support or support from other models that have performed well this tropical season. At this point, the only organized system they seem to be picking up over the next 7 to 10 days is Invest 94L. So we anticipate that’ll be the only real game in town for a bit.
Leslie heading out to sea while Invest 94L may develop just west of the Cabo Verde Islands.
We are monitoring the western Caribbean next weekend, but there is still nothing of specific significance that we can state about the potential of development, and we urge you to not fall prey to one-off model runs that show scary outcomes.
The close of our post talks a bit about or mission and goal for this site, as well as what we don’t want to be!
Leslie and 94L way out in the Atlantic
We’re beginning a period of calmer conditions in the tropics. At least as it relates to land-impacts from tropical systems. Milton is now history. Leslie is still churning away in the open Atlantic but it too will soon be history.
Tropical Storm Leslie may brush the Azores as a non-tropical storm on the way out to sea. (NOAA NHC)
Off the coast of Africa, we currently have Invest 94L. This looks ready to pop in the next few days. Model guidance agrees on this, and the overall environment looks decent. Steering winds should bring it west across the Atlantic.
Invest 94L looks fairly healthy over the Cabo Verde Islands and could develop in the next few days as it migrates westward. (Weathernerds.org)
While this is unlikely to threaten the U.S. at any point, this is at least something to monitor if you live in the Caribbean. It’s still a solid week away, but with water temperatures still sitting near all-time records in the Main Development Region (MDR) of the Atlantic, the right environment could easily incubate a strengthening storm.
Tropical cyclone origins and tracks since 1851 from October 11th through the 20th. (NOAA NHC)
That said, this would be unusually far east for a storm to develop this late in the season. Only one system has formed east of the Cabo Verde Islands since 1851 in mid-October, and only a couple others within 10 degrees of longitude west of there. If 94L forms soon, it would be an oddity. Most storms that form in the central or eastern Atlantic this late in the season tend to curve out to sea before getting to the islands, but obviously some have come close.
We’ll keep an eye on 94L and have more for you Monday.
Eyes on the Caribbean?
There was one particular GFS operational model run yesterday that sent some folks into a tizzy over the potential for a big hurricane in the Gulf in about 10 to 12 days. I want to remind you all that operational model runs like that specific GFS run are not suited to trust more than 5 to 7 days out. Even within 5 to 7 days there are often issues and miscalculations with the model. So don’t panic when you see that.
Zero consistency between runs on the GFS operational model and little to no additional model support for a storm in the western Gulf. (Tropical Tidbits)
No consistency, no trustworthiness.
Most models agree in a tropical disturbance trying to form in the western Caribbean sometime later next week.
There is decent agreement on the potential for a tropical disturbance in the western Caribbean next weekend. (Weathernerds.org)
This is a century away in model terms, and there is very little agreement on where things go from here, if anywhere at all. We have a very long time to watch this area, but I would encourage you not to stress over things. A lot of moving parts will impact whether or not this develops, including cold fronts, locations of specific features, etc. Right now, we simply have nothing intelligible to really say about this other than a disturbance is possible there in a week’s time. Anyone selling anything specific at this point should be added to your “do not trust” list immediately. More on this Monday.
Friday featured sponsor: Senior Health Services
Thank you to Senior Health Services and all our sponsors for their support of The Eyewall this season!
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A final word
We have had some very spirited comments in recent posts, which have been useful and interesting conversationally! We encourage that. We just ask to keep it respectful. I don’t want to have to moderate or shut things down at any point. We trust y’all to treat each other with courtesy.
Secondly, I just want to clarify a couple misconceptions I read. We did not build this site for Houston. While we hope Houstonians will use it as a companion to the robust information we offer at Space City Weather, we built this site for everyone else, truthfully. There are a handful of good blogs out there talking about the weather, and we want to join them. I hope any of you in Florida, Georgia, Louisiana, or the Carolinas will share this site with your friends and family. We try not to advertise and prefer our growth to be by word of mouth in most cases. Let our work speak for itself.
There are two primary reasons we don’t post 5 or 6 updates a day when a storm threatens someone. First, honestly, not a whole lot changes from morning to evening. Yes, a storm can rapidly intensify or change intensity but in general, that doesn’t have a massive impact on the forecast, and if it does, in most cases a second post later in the day will cover it. We live in a world with frequent, *URGENT* push alerts. We aren’t that. We don’t want to oversaturate you with repetitive stuff just so we can show we’re still on top of things and generate traffic for the sake of traffic. We want our posts to carry value and information, not regurgitation. Second, we are not local experts on Tampa or Jacksonville or Cape Hatteras or Charleston. We could never be. We know a bit, in some cases a lot about geography. But the local nuance can only be covered by local experts. That’s why at a point, we want you to find trusted local sources of information to turn to, such as your local NWS office or a particular broadcaster or online source in your region. Simply, we cannot do at scale what they do for you locally. So yes, please use us! But make sure you’ve got someone not from Houston that you’re following to give you that local insight or nuance that you need.
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