The very active 2020 Atlantic Basin tropical season continues today with multiple systems on the scene from the southwestern Gulf of Mexico to western Africa. Sally has intensified into hurricane status over the northern Gulf of Mexico and it is a very slow-moving system in an area of weak winds. As a consequence, Sally is going to be a major rain producer for the northern Gulf coastal region and some spots can receive up to two feet of rain over the next day or so. By later tomorrow, this system will begin a push to the north and east and it'll take until week's end for the remnants to reach the Carolinas. The timing of the heaviest rain associated with Sally's remnants in the Tennessee Valley will likely be late Wednesday into early Friday.
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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 new work week begins with an active tropical scene in the Atlantic Basin including Tropical Storm Sally which is slowly moving to the west-to-to-northwest over the northern Gulf of Mexico. This system has a good chance to intensify into a hurricane over the next 6-12 hours as it churns slowly towards the northern Gulf coastal region. Sally is likely to reach southeastern Louisiana or southern Mississippi in the overnight hours and it’ll remain quite a slow moving system. As a consequence, there is the potential for substantial rainfall amounts in the northern Gulf region from southeastern Louisiana to the western part of Florida’s Panhandle – perhaps on the order of one to two feet. After landfall, this system will head inland and push to the north and east bringing heavy rainfall to the Tennessee Valley in the late Wednesday to early Friday time period. Stay tuned.
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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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It’ll stay hot around here for one more day with high pressure to our east and low pressure to our west. Temperatures are likely to reach the lower 90’s for afternoon highs, but will begin a slow downward trend later this weekend. In fact, highs may be confined to the lower 80’s by the time we get to the middle of next week. There is enough moisture in the region for a continued chance of showers and thunderstorms with a focus on the afternoon and evening hours. Elsewhere, the tropics remain very active in the Atlantic Basin with multiple waves to monitor in coming days.
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If you try to pinpoint the climatological peak in the Atlantic Basin tropical season to one particular day in terms of the number of active storms, it actually comes down to today, September 10th. Well, here we are and right on queue, there are numerous waves to monitor in the Atlantic Basin from the eastern Gulf of Mexico to just off the west coast of Africa. A few of these tropical waves are relatively close to the US and will have an impact in the near-term while another few systems are potential concerns for the second half of September. Meanwhile, the Pacific Ocean remains unusually quiet in terms of tropical activity in what should also be an active time of year. In fact, the overall tropical activity in the world’s largest ocean has been way below-normal in 2020 and this has contributed to a below-normal tropical season so far for the Northern Hemisphere as a whole.
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High pressure ridging has intensified in the eastern states and is resulting in hot weather around here that will continue for another few days. There is enough moisture in the region for a continued chance of showers and thunderstorms with a focus on the afternoon and evening hours. Elsewhere, the tropics remain quite active with multiple waves to monitor in coming days now over the eastern Atlantic.
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The weather pattern has undergone a change across the country with the Rocky Mountain States shifting from summer conditions to cold and accumulating snows from Wyoming to New Mexico. High pressure ridging has intensified in the eastern states and is resulting in hot weather around here that will continue another couple of days. More moisture may push into the area by the end of the week and this is likely to bring us a renewed threat for showers and thunderstorms.
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The weather pattern is undergoing a change across the country with the Rocky Mountain States shifting from summer conditions to accumulating snows in many areas from Wyoming to New Mexico. High pressure ridging will intensify in the eastern states and it’ll result in warmer conditions around here with highs near 90 degrees over the next few days. More moisture may push into the area by Thursday and this is likely to bring us a renewed threat for showers and thunderstorms.
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It’ll be hot again in the Tennessee Valley as we close out the work week with highs near the 90 degree mark, but a frontal passage will usher in cooler air for the weekend. In fact, temperatures late tonight and again late tomorrow night will fall to comfortable levels in the low-to-middle 60’s. High pressure will push east of here early next week and this will produce a broad southwesterly flow of air into the region resulting in warmer and more humid conditions with highs getting back to near the 90 degree mark.
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