Today looks to be dry and comfortable in northern Alabama, but the threat of showers returns on Thursday as a system moves eastward across the western states. By tomorrow, an influx of moisture from the Gulf region will increase instability around here and the chance of thunderstorms will return. At the end of the week, a cold front slides across the area and the rain threat will diminish from west-to-east likely paving the way for a nice weekend in the Tennessee Valley.
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It remains cool today across northern Alabama with afternoon highs likely confined to the mid 60’s despite a good deal of sunshine. Temperatures late tonight can bottom out in the lower 40’s, but should rebound nicely on Wednesday with highs back to the 70 degree mark.
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Chilly conditions in the Tennessee Valley will greet the new work week with the intrusion of a cool air mass on the heels of a frontal passage. In fact, temperatures late tonight and drop to the lower 40’s for overnight lows…well below-normal for this time of year. High pressure builds into the region at mid-week and a slow warming trend will begin.
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Today and Saturday will feature temperatures reaching the 70’s in northern Alabama, but a frontal passage on Saturday night will bring cooler conditions to the area. Highs on Sunday are likely to be confined to the lower 60’s and there will likely be some stubborn clouds in the area.
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A Gulf of Mexico low pressure system will be aided by moisture from the Pacific Ocean (remnants of Hurricane Lidia) and will spread some heavy rainfall to the southern sections of Mississippi and Alabama as it treks in an east-to-northeast direction. While the heaviest rainfall looks like it will stay to the south of here, showers are on the table for northern Alabama.
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An upper-level trough of low pressure will deepen as it treks across the northern states in coming days at the same time a tropical low pressure system forms over the western Gulf of Mexico. This Gulf low will be aided by moisture from the Pacific Ocean (remnants of Hurricane Lidia) and will spread some heavy rainfall to the southern sections of Mississippi and Alabama as it treks in an east-to-northeast direction. While the heaviest rainfall looks like it will stay to the south of here, showers are on the table for northern Alabama later in the week.
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Two big weather stories over the next several days will include a Pacific Ocean-to-Gulf of Mexico “tropical hand-off” and yet another weekend rain event is in the cards for the Mid-Atlantic region. Hurricane Lidia will head into western Mexico later today and some of its tropical moisture will make it across Mexico at mid-week giving a boost to a tropical wave sitting over the southwestern Gulf of Mexico. Surface low pressure with a Pacific Ocean-to-Gulf of Mexico tropical connection will form by later tomorrow over the western Gulf and then spread some heavy rainfall across the northern Gulf/Southeast US as it takes a path to the east-to-northeast.
Meanwhile, a deepening upper-level low pressure system will cross the nation from west-to-east in coming days and set off the development of surface low pressure over the Ohio valley by week’s end. This primary or initial low will then give way to a secondary low pressure system likely to form early this weekend along the Mid-Atlantic coastline. The result will continue a recent trend in the Mid-Atlantic region with some weekend rain and very cool conditions featuring a persistent onshore flow of air.
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A weak disturbance can produce some clouds in the area today, but for the most part, it looks like a dry and warm across the northern part of Alabama. Low pressure will form over the western Gulf of Mexico during the next 48 hours and we’ll have to keep an eye on its precipitation field as it pushes to the northeast. Currently, it appears as though the main area of rainfall will stay to the south of here, but showers are still a threat from tomorrow night into Thursday.
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High pressure near the Gulf of Mexico remains in control for the next couple of days in the Tennessee Valley generating comfortable daytime temperatures and plenty of sunshine. A weak cool front will approach the area later tomorrow, but it lacks moisture and will be relatively dry.
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A strong cold front arrives here later today and its passage will result in a much cooler weekend in the Tennessee Valley. The influx of the coolest air mass so far this fall season will take place tonight as northwesterly winds pick up in intensity and temperatures by early Saturday will be in the mid-to-upper 40’s. It stays breezy and cool on Saturday and then temperatures will drop to near the 40 degree mark by early Sunday morning. A gradual warmup early next week will bring temperatures back to near 80 degrees for afternoon highs at mid-week.
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