Low pressure will intensify over the Tennessee Valley early today and head towards the coastal waters of the Mid-Atlantic by early tonight. The result around here will be a tightening pressure gradient and gusty northwest winds; especially, in higher elevation locations. By tonight, high pressure will shift overhead and this will allow for excellent radiational cooling and low temperatures near freezing by morning. As the high shifts to the east at mid-week, it’ll turn warmer and highs will back to near 60 degrees by Thursday afternoon.
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A low pressure system is likely to develop over the Tennessee Valley on Tuesday as two waves of energy aloft try to consolidate – one moving along in the northern stream and the other in the southern stream. This low pressure area will push moisture into the region and the threat for showers will increase late tonight. The overall pattern will remain rather mild for early January and we can climb into the 60’s at the end of the week.
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The soaking rain even that began on Thursday will continue today with occasional showers and possibly a thunderstorm or two. An additional half inch of rainfall is possible from today’s action on top of what fell yesterday and last night in the northern Alabama region. It’ll stay quite mild today with continuation of warm air advection and highs are likely to be in the 60’s across the region. The low pressure system associated with an upper-level trough will move from the southern Plains early Saturday to the Ohio Valley and drag a cold front through our region early in the day. Colder air will surge into the region later in the day and lows late tomorrow night are likely to be near the 30 degree mark across the region.
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A heavy rain event is underway for the region as copious amounts of moisture flow northward from the Gulf of Mexico as a trough of low pressure continues to track eastward. There will be occasional showers today and tonight with embedded thunderstorms possible and some of the rain is likely to be heavy at times. In fact, some spots in the Tennessee Valley can receive as much as two inches of rain by later tonight and flash flooding will likely become a concern.
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The dry weather of today will give way to some shower activity by late tonight and periods of rain are possible on Thursday and Friday and there is the potential that some of the upcoming rainfall can be heavy at times. A trough of low pressure will intensify over the next couple of days as it slides towards the Tennessee Valley from the Rockies. On Friday, a trailing cold front will move through the region and this will act to push any rainfall to our east, but it’ll also result in a big time cool down to begin the weekend.
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It’ll be on the cool side as we close out the year and temperatures overnight should drop all the way to the freezing mark in many spots. The dry weather on Wednesday, New Year’s Day, will likely give way to some shower activity in the wee hours of Thursday morning and then it’ll turn milder again by week’s end.
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A cold front passed through the region in the wee hours of the morning and a westerly flow of air behind will limit the cooling effects today and temperatures will still be able to make it into the middle 50’s for afternoon highs. It’ll turn slightly cooler on Tuesday, but the cool down will be replaced by milder and more humid air for much of the second half of the week with a shower threat likely on Thursday and Friday.
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An inflow of moisture will increase in the area today as a storm system begins to take shape across the southern Plains. As the storm begins to push to the northeast, our chance for showers will increase and the threat for rain will continue into Saturday as well. Showers and even thunderstorms are likely on Sunday as well as a cold front arrives in the region and then it’ll turn cooler and drier early next week.
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Deep upper-level low pressure that has been impacting the southeast US during the past few days has finally pushed off the coastline. High pressure will take over control of the weather around here – just in time for a nice Christmas Day - and it’ll turn warmer as well. The nicer stretch of weather should continue through the remainder of the week.
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Low pressure will shift into the Carolinas today and light rain this morning will taper off around here and then drier air filters in this afternoon. Mainly clear skies will return for tonight and Tuesday as high pressure pushes into the Tennessee Valley and it’ll turn noticeably milder. In fact, the warmth will stick around for much of the mid and late week time periods as ridging takes control in the middle of the nation and we’ll stay warmer-than-normal around here.
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