Possibility of Gulf of Mexico development next week

I posted recently that a window of opportunity for development could be lurking and it looks as though that chance is beginning to arrive.

The NHC has outlined an area of interest centered on the Yucatan peninsula that could become the focal point for possible tropical development early next week.

Right now, there is little to even monitor but the overall consensus of the global models is to gradually lower the pressures across the region as upper level winds become more conducive for something to take shape. It will be a fairly slow process and all indications are that the low will large and spread out meaning more rain and low wind impacts for a larger area – assuming this is what in fact happens.

I have prepared a detailed video discussion concerning the potential for development – check it out below. I will have more posted here tomorrow early afternoon.

Also – tonight I will be a guest on the popular Internet show Storm Front Freaks talking all things hurricanes. To watch live via YouTube, click this link – the show begins at 9pm ET and will be archived for later viewing and available as a podcast via iTunes.

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Window of development opportunity coming up?

It’s still early June and typically this time of the hurricane season means that things are usually quiet. Every once in a while we will get a June tropical storm or hurricane, but it’s not the norm. As most of you know, the season really begins to ramp up from about mid-August on. Usually….

This season might not be usual.

I am seeing the beginnings of signs that may point to a development window opening over the next week to ten days and beyond.

GFS and its ensemble members indicating a more favorable MJO state coming up for portions of the Western Hemisphere over the next couple of weeks

GFS and its ensemble members indicating a more favorable MJO state coming up for portions of the Western Hemisphere over the next couple of weeks

For starters, the Madden-Julian Oscillation or MJO is forecast by the GFS and Euro models to be moving in to the phase that often supports development somewhere within the Atlantic Basin. The MJO phenomenon is easy to think of as a period of fertility in the tropics, when deep convection can form and blossom, not just fizzle out and dissipate. While the MJO helps to enhance development it does not necessarily mean that development is a certainty.

The upcoming signal from the MJO is not especially strong but it is there (forecast to be there anyway) and could lead to better upper level winds over parts of the southeast Pacific and extending in to the western Caribbean and western Gulf. With water temps plenty warm in the region, all we need is a kick and it could lead to development in one basin or the other, maybe both. We will have to just wait and see.

If we look at the GFS operational model at the 850 millibar level which is about 5k feet up, we can see one week out from today that a wind shift or monsoonal trough begins to set up from the southeast Pacific, across Central America and in to the western Caribbean. This would act like a focusing mechanism for the air to come together or converge, probably leading to enhanced convection (thunderstorms) across the region.

GFS model at 168 hrs showing (yellow area) a wind shift and overall troff of low pressure stretched out over a large area, we call this a "monsson trough" and it can lead to development if conditions allow

GFS model at 168 hrs showing (yellow area) a wind shift and overall troughof low pressure stretched out over a large area, we call this a “monsoon trough” and it can lead to development if conditions allow

This large counter-clockwise “gyre” is so spread out that in and of itself it wouldn’t develop. We would need to see if an area of concentrated energy or vorticity breaks off and tries to develop out of this larger area of energy. If so, then a low pressure area could get going either in the Pacific or the western Caribbean – leading to the chance of a tropical depression or storm at some point.

As you can tell, the process is long and complex. I am not going to dwell on it day after day for two weeks but it is something to keep an eye on. At the very least, more rainfall than normal may be setting up for portions of Central America and it may lead to a named storm on one side of Central America or the other. Time will tell.

Then there is this interesting set up taking shape: The ECMWF (Euro) is indicating the possibility of an easterly wave (tropical wave) trying to develop way out in the deep tropics between Africa and the Lesser Antilles. Remember, water temps out this way are running above the long term average. If we do in fact see a strong area of energy emerge from Africa, it could take advantage of the warmer water and more favorable conditions overall  and try to develop some. This would be highly unusual and a significant sign in my opinion that this season could be quite busy. Again, time will tell.

We live in an age when computer guidance and satellite information allows us to see in to the future of weather forecasting better than ever before. These early warning signs are helpful since we should no longer be totally caught off guard. It may not prevent a “Labor Day hurricane of 1935” scenario in which case we saw a TS become a Cat-5 hurricane in a very short amount of time but the advances in technology now allows us to be more aware than ever that a threat from the tropics is looming (or could be looming). My point is, do not be alarmed or worried. There’s no reason for that. Instead, be aware. We were told the season could be busier than average and these are possible signs of that happening. So just take note and pay attention a little more than normal perhaps. Applaud the fact that we have such tools at our disposal and as long as we know how to interpret them, it can be a good thing. After all, with such much at stake along our coastlines (all of us, not just the USA), the more lead-time the better; at least I think so anyway.

I’ll have more on Monday during my video discussion.

M. Sudduth 1:20 pm ET June 9

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Any chance of El Niño during Atlantic hurricane season is almost gone

I wrote about this in a recent blog post and so I thought it prudent to do a follow-up piece regarding the chances of El Niño making an appearance during the next few months.

Well, they say a picture is worth a thousand words…

Subsurface temperature anomalies along the equatorial Pacific as of June 2

Subsurface temperature anomalies along the equatorial Pacific as of June 2, 2017. Notice the lack of positive anomalies (yellow-orange-red) anywhere across the tropical Pacific. It’s mostly neutral for the time being.

 

Just looking at the most recent subsurface anomalies chart that was updated on June 2, we see that there is virtually no warm pool left in the tropical Pacific west of about 150 degrees longitude. The only positive anomaly, or warmer than normal area, is in the eastern Pacific and even here we’re talking about only a degree C at the most. To break it down in to simple terms: no El Niño anytime soon, if at all in 2017.

What does this mean for the Atlantic season? It means that we are likely to see less of the hurricane-inhibiting wind shear across the Caribbean and tropical Atlantic. That, in turn, should result in a busier season than we have seen in quite some time. It’s no guarantee as there are certainly other factors at play but the lack of El Niño is often seen as a significant enhancing signal for Atlantic hurricane activity.

We will get a new set of ensemble model plots from the ECMWF, which is often regarded as the model of choice, that will give us an update on its “thoughts” for the coming months. That model was quite aggressive in developing an El Niño going all the way back to the early winter months. We’ll see if it has seen the light, so to speak, and has backed off like other modeling has in recent weeks. I’ll keep an eye out for that new data and will include in during a future video discussion, so be on the lookout for that.

In summary, I think it is safe to say that El Niño will not be a factor this season and that, in and of itself, is reason enough to take the 2017 Atlantic hurricane quite seriously. We should be doing so any season but perhaps this time around, there may be more to it than normal. Time will tell.

M. Sudduth 8:20 AM ET June 7

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Atlantic hurricane season begins today

Here we are again, it’s June 1 and that means it is hurricane season. A lot has been said in recent weeks about what kind of season we may have. While it appears that conditions would support a busy season, it is just too tough to know with much certainty how things will turn out. Even if we have a lot of hurricane activity, there’s no way to know where they will track. It is always best to just stay aware and be ready no matter what.

Since it is hurricane season now, the video discussions will be pretty much every day. I’ll post them here and of course they will be in our app, Hurricane Impact, and on YouTube (search hurricanetrack).

In today’s video I go over the latest on east Pacific tropical storm Beatriz and its effects on Mexico and some potential for it to redevelop somewhere within the Gulf of Mexico early next week. I also break down the latest SST anomalies and a look at recent ENSO thoughts as we begin the season.

M. Sudduth 4:30 PM ET June 1

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If El Niño is coming, it will likely be too little, too late

Mid-March ENSO forecast showing a high probability of El Nino conditions setting in by the summer months.

Mid-March ENSO forecast showing a high probability of El Nino conditions setting in by the summer months. Click for full size image.

There was a lot of talk about the resurgence of El Niño just a couple of months ago and it looked as though we were in fact heading in that direction. This would have been unusual to see since we just had a substantial El Niño or warm ENSO event back in 2015.

The presence of El Niño is also a known detriment to Atlantic hurricane activity, especially in the deep tropics. As such, most of the reliable seasonal forecast agencies were calling for less activity than we saw in 2016.

So where do we stand now? As we approach mid-May, the odds of El Niño are going down. There are some mechanisms in place to get it started but so far, it’s stalling out of the gate.

Latest subsruface anomaly chart showing only limited warming overall and nothing significant at the surface of the tropical Pacific

Latest subsurface anomaly chart showing only limited warming overall and nothing significant at the surface of the tropical Pacific. Click for full size image.

Take a look at the latest subsurface anomaly chart and you’ll see what I mean. The top of the chart is the surface of the tropical Pacific while the bottom represents more than 400 meters of depth. While there is a large “blob” of positive anomalies showing up, it is no where near as substantial as what we saw in 2015. Furthermore, it is not strengthening and being reinforced by more warm water from the western Pacific. Instead, the tropical Pacific as a whole is in a neutral state – neither too warm nor too cold right now.

The latest climate models have backed off quite a bit in recent weeks with regards to warming of the tropical Pacific. Just a month ago, it appeared that we had a near 70% chance of seeing El Niño conditions by August/Sept/Oct – now that probability has dropped to 46% according to the latest update from the Climate Prediction Center. What happened? The easy answer is that spring is usually a difficult time for the climate models to resolve what will happen with the ocean/atmosphere state several months down the road. A more complicated answer lies in the fact that there are still many mysteries surrounding the evolution of ENSO or El Niño-Southern Oscillation as it is often referred to. Sometimes we get El Niño and sometimes we don’t and the reasons why are still unclear.

Mid-May climate models have backed off the chances of El Nino quite a bit.

May climate models have backed off the chances of El Nino quite a bit.

What is becoming increasingly clear, however, is the fact that for the 2017 Atlantic hurricane season, El Niño isn’t likely to be a factor. This puts a check mark in the enhancing column for seasonal activity but the absence of El Niño alone is no guarantee of a busy season. That being said, there are recent developments in the climate models for the summer months that suggest the Atlantic Basin could be more favorable than we have seen in quite some time.

As of today, much of the deep tropics between Africa and the Lesser Antilles are warmer than normal while the subtropical Atlantic has cooled dramatically. This would tend to focus lower pressures and more favorable conditions right where we’d expect it to be – the deep tropics. While this can change, it appears that we will begin the 2017 season with no El Niño and a warmer than normal tropical Atlantic. I think it is a safe bet that for those who issue seasonal forecasts, their numbers will go up in the coming weeks.

SST anomalies have gone up in the deep tropics in recent weeks, a sign of possible higher hurricane activity during the season ahead.

SST anomalies have gone up in the deep tropics in recent weeks, a sign of possible higher hurricane activity during the season ahead.

Numbers aside, it is important to note that no one can predict where whatever does form will end up, if anywhere at all. A season like 2010 had plenty of hurricane activity but not a single one crossed the U.S. coastline. On the other hand, a season like 1992 had one significant hurricane – just one. And as they say, that’s all it took. We live in very different times than we did 10-12 years ago and that is not just hyperbole, it’s true. The advent of social media, the rise of so-called “fake news” and other political distractions mean that it is literally up to you, on a very personal level, to learn all you can about your local vulnerability to hurricane impacts. We could have 2 hurricanes form this season or 12, no one knows for sure. What really matters is where they end up and if that is your backyard, you will be doing yourself and your family a favor by being ready.

I will have much more on the coming season during a special live broadcast via YouTube Live on Thursday, June 1 at 7pm ET. Until then, get ready, hurricane season is coming – just like it does every year around this time. No reason to ignore it or act like the sky is falling, we should be prepare the same year in and year out.

M. Sudduth 8:50 AM ET May 12

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