A big change to colder is coming to much of the nation as we push into the early part of the month of March. After a couple of days of mild weather and occasional showers, colder air will begin dropping southeastward across the Plains. This cold air mass for this time of year will makes its way into the Tennessee Valley by the early part of next week. As a result, the first half of next week is liable to feature high temperatures in the 40’s and snow showers are on the table.
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March may come in like a lion…a cold lion…as about 2/3rds of the nation will be well below normal for early March with the cold wave extending from the Rockies to the New England coastline and to the Gulf coast. In addition, the calendar turn from February to March will be accompanied by an active weather pattern with multiple waves of energy and an accumulating snow threat in the I-95 corridor late tomorrow night/early Friday and another wintry event possible late in the weekend.
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Drier air in the upper part of the atmosphere will result in a nice day today across the Tennessee Valley. However, another system will swing out of the Rockies later today and arrive here by early tomorrow increasing the chance for showers and thunderstorms. Rain chances will diminish tomorrow night as the system heads towards the east coast. Much colder air will arrive in the Tennessee Valley this weekend and the first week of March looks to be well below normal in much of the nation.
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After a break in the action from the recent wet weather pattern to start the new week, clouds will increase today and the threat for showers will return later tonight and continue for the next few days in the Tennessee Valley. To go along with the increasing chance of showers, it’ll turn quite mild with highs not far from 65 degrees during the next few days. A cooling trend will begin early this weekend and then a strong cold frontal passage will bring very chilly air for early March to the Tennessee Valley later in the weekend and for the early part of next week.
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A strong upper-level ridge of high pressure will build into the region early this week from the Northern Plains. This system will lead to rather seasonable conditions in the Tennessee Valley and a generally quiet weather pattern for the first half of the week. Later in the week, surface high pressure will move to the east allowing for a return flow of more humid air and an increase chance for showers.
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Mid-Atlantic/Northeast US/Midwest: A storm that has already been a news making event in the Southwest US for its unusual snowfall will undergo explosive intensification this weekend and continue to make news as it’ll have major ramifications across much of the rest of the nation. Low pressure is heading northeastward today from the southern Plains and towards the Great Lakes and it will generate blizzard conditions all along the way. This system has the potential to strengthen over a 36-hour period from around 999 millibars this morning to near 971 millibars by late Sunday and it can result in monthly record low pressure readings in parts of the Great Lakes region.
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Mid-Atlantic/Midwest/Northeast US: A storm that has already been a news making event in the Southwest US for its unusual snowfall will undergo explosive intensification this weekend and continue to make news as it’ll have major ramifications across much of the rest of the nation. Low pressure will pull out of the Southwest US early Saturday and begin to rapidly intensify as it starts a push to the northeast and towards the Great Lakes region where it will become an all-out blizzard. This system has the potential to strengthen over a 36-hour period from around 995 millibars (29.38 inches) early Saturday morning to near 973 millibars (28.73 inches) by late Sunday and it can ultimately result in monthly record low pressure readings in the Great Lakes region.
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A strong upper-level wave of energy will push out of the western US and into the center of the nation this weekend and help to intensify low pressure. This rapidly intensifying low pressure system will move from the Southern Plains on Saturday to the Great Lakes region by early where it will result in blizzard conditions. On the eastern side of this storm system, warm and humid air will flow into the Tennessee Valley and generate showers and thunderstorms with some of the rain likely to be heavy at times. Localized flooding will become an increasing concern as we head into and through the upcoming weekend given the already well-saturated grounds in the Tennessee Valley.
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Upper-level wave will move into the Tennessee Valley and combine with a moist southwesterly flow of air giving us a good chance at more rain. Rainfall amounts are, however, expected to be on the low side as upward motion will not be significant. Rain chances will continue on Friday as the next frontal system approaches the region.
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Upper-level high pressure ridging over the southeastern US is combining with an upper trough over the western US to put a squeeze play on the Tennessee Valley which is in the battle zone between the two features. As such, a wet weather pattern has developed for the local area and will persist for several days. There will be plenty of precipitation around here in coming days and this could ultimately result in flood watches to be posted in parts of the Tennessee Valley.
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