There are currently five systems in the Atlantic Basin that are characterized as tropical depression or greater and that high number hasn’t happened since September of 1971. Currently, there are three systems that are classified as tropical storms, Sally, Teddy and Vicky, and one hurricane, Paulette, which passed over the island of Bermuda earlier today. Tropical Storm Sally is a slow-moving system now over the northern Gulf of Mexico and it may end up producing up to two feet of rain during the next couple of days in portions of the northern Gulf coastal region. After landfall, the remnants of Tropical Storm Sally are likely to push to the north into southern Mississippi and then to the northeast through Alabama and Georgia – bringing some heavy rainfall along its path. The heaviest of the rain from Sally’s remains are likely to stay south of the Mid-Atlantic region as a strong cold front barrels from northwest-to-southeast towards the eastern seaboard. That cold front will usher in the coolest air mass of the season so far in the Mid-Atlantic region and Northeast US during the upcoming weekend.
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The very active 2020 Atlantic Basin tropical season continues as we reach the middle part of September with multiple systems on the scene extending from the western Gulf of Mexico to the eastern Atlantic Ocean. One of these systems is currently categorized as a hurricane, “Paulette”, and it is likely to impact Bermuda in the near-term. There are two tropical storms in the mix including “Rene” in the central part of the tropical Atlantic and “Sally” now over the eastern Gulf of Mexico. Tropical Storm Sally is of great concern to the northern Gulf coast region as it could slow down near and after landfall - potentially resulting in substantial rainfall amounts of more than a foot by the middle of the week. The remnants of Tropical Storm Sally are likely to push inland at mid-week bringing significant rains to the south-central states and then into the Carolinas.
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The next 24-36 hours will be a very active period in the Mid-Atlantic region with the threat for severe thunderstorms from later this afternoon into tomorrow night and tropical downpours. There are even signs for a “bow echo” to form later today which could result in damaging wind gusts of > 60 mph (and possible power outages); especially, across eastern Pennsylvania and the southern and central parts of New Jersey. There is even the threat for isolated tornadoes later today in the I-95 corridor. Following all of this activity, a spectacular air mass for this time of year will ride in on stiff NW winds during the day Sunday and the very comfortable temperatures and humidity levels will stay around on Monday as well. Looking ahead, it’ll turn much more unsettled again around here on Tuesday and Wednesday with a renewed chance of showers and thunderstorms, and peaking even further down the road, there could be more tropical trouble to deal with in the eastern/southern states over the next week or two.
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Hurricane Laura came ashore last night near the town of Cameron in southwestern Louisiana initially estimated as a category 4 storm. It has pushed northward today into upstate Louisiana and has weakened along the way to a category 1 hurricane; however, it is still producing heavy rainfall and damaging wind gusts and will continue to do so into the state of Arkansas and parts of the Tennessee Valley. By the weekend, the remains of Hurricane Laura will interact with an incoming frontal system and upper-level trough to produce some heavy rainfall in the Mid-Atlantic region along with the potential for strong-to-severe thunderstorms. All of this activity will clear the east coast by Sunday and a spectacular air mass for late August will push into the Great Lakes, Northeast US and the Mid-Atlantic region.
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Hurricane Laura has reached “major” hurricane status as a category 3 storm and it should intensify into a category 4 system this afternoon as it heads on a collision course with the Texas/Louisiana border region and expected landfall later tonight. Hurricane Laura intensified rapidly during the past 24 hours in a favorable environment of low wind shear and very warm sea surface temperatures and continues to intensify today - now just a bit under the required levels for a category 4 classification. After Hurricane Laura makes landfall later tonight, its story line will not be over. Its remains will push northward into the south-central states on Thursday producing heavy rainfall, severe weather, and damaging wind gusts. By the early part of the weekend, the remains of Hurricane Laura will turn to the east and get intertwined with a frontal system and an incoming vigorous upper-level trough to potentially produce some heavy rainfall in portions of the Mid-Atlantic region. Once off the Mid-Atlantic coast, the remnants of Hurricane Laura could actually re-intensify as it moves out over the warm waters of the western Atlantic.
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Hurricane Laura could become a “major” hurricane before making landfall late Wednesday night or early Thursday likely somewhere near the Texas/Louisiana border. Hurricane Laura has cleared the island of Cuba and is now pushing over the very warm waters of the southwestern Gulf of Mexico. The combination of weak wind shear and very high sea surface temperatures will contribute to rapid intensification over the next 24-36 hours. After Hurricane Laura makes landfall in the western Gulf coastal region, its story line will not be over. Its remains will push northward into the south-central states and result in heavy rainfall and potential severe weather and then the remnants may turn to the east, interact with a frontal system, and potentially produce heavy rainfall and severe weather in the Mid-Atlantic region early in the upcoming weekend.
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Tropical Storm Laura is a growing threat for the coastline region of Texas and Louisiana with a possible landfall late Wednesday. Tropical Storm Laura is very likely to intensify into hurricane status once out over the open warm waters of the Gulf of Mexico and it could become a “major” hurricane (i.e., category 3 or higher). Meanwhile, Tropical Storm Marco has weakened as it nears the central Gulf coastal region due to wind shear in its vicinity. The low-level circulation center of Tropical Storm Marco has been displaced from the main area of convection (thunderstorms) and it will tend to dissipate over the next few days.
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The very active 2020 Atlantic Basin tropical season continues and there is likely to a “double-strike” of tropical storms on the central/eastern Gulf of Mexico by the middle of the week. Tropical Storm Marco is now out over the open waters of the very warm Gulf of Mexico and is likely headed towards a landfall on Monday in the central Gulf region (Louisiana). Tropical Storm Marco is now flirting with hurricane status and its trek over the very warm water of the Gulf could give it the boost needed to attain category one hurricane status. Tropical Storm Laura is currently interacting with the island of Hispaniola and it too is likely to make a run towards the central Gulf region (Louisiana/Texas border region) by the middle of the week. Tropical Storm Laura may also get a boost from the very warm waters of the Gulf of Mexico which could boost it to hurricane status before landfall later in the week.
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The 2020 Atlantic Basin tropical season has gotten off to a very active start and two systems are likely to have a high impact on the Gulf of Mexico by the early and middle parts of next week. One system is likely to cross over or right near the Yucatan Peninsula region of Mexico in the near-term and then push over the western part of the Gulf of Mexico and head towards the Texas/Louisiana border region. A second system is likely headed near or over the northern Caribbean islands of Puerto Rico, Haiti/Dominican Republic, and Cuba in the near-term and then perhaps through the Florida Straits before entering the Gulf of Mexico by early next week. Both of these systems are likely to intensify into named tropical storms status – one would be “Laura” and the other “Marco” – and perhaps even to hurricane status before possible landfalls next week as high sea surface temperatures will aid in further intensification.
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The 2020 Atlantic Basin tropical season has gotten off to a very busy start and a parade of systems is going to keep it busy right through the remainder of August. There are now two tropical depressions in the Atlantic Basin which are likely to reach tropical storm status in coming days with the Gulf of Mexico the likely high impact zone by the early or middle of next week. A third tropical wave has reached the west coast of Africa and there is yet another wave situated over the central part of Africa. A “teleconnection” index known as the Madden-Julian Oscillation (MJO) which tracks an eastward-moving tropical disturbance supports the idea for increased tropical activity over the next couple of week. In addition, the latter part of August is a time of year when tropical activity tends to ramp up as sea surface temperatures climb towards their peak supporting the formation and intensification of tropical cyclones in the Atlantic Basin.
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