Tornadoes are running at above-normal levels across the nation so far this season and there is the potential for another severe weather outbreak at the end of this week. In much the same manner as at the end of the last week, the atmosphere will become very unstable by Friday night in the Mississippi Valley region with a multitude of ingredients coming together including vigorous upper-level support, an intrusion of warm, humid air from the Gulf of Mexico, and an influx of cold, dry air from the north and west. A similar weather pattern late last week resulted in an outbreak of tornadoes across Mississippi and Alabama that tragically resulted in the death of at least 26 people. The powerful cold front that will play a major role in the late week severe weather threat in the Mississippi Valley will plow through the Ohio Valley and into the eastern states on Saturday possibly resulting in damaging wind gusts of 50-60 mph in those sections of the country.
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A cold front passed through the region on Monday and temperatures today will be some 5-10 degrees lower than yesterday resulting in afternoon highs in the middle 60’s. High pressure will take control of the weather for Wednesday and Thursday and then attention will turn to another volatile setup for the end of the week. A strong cold front will approach the region by week’s end and we could end up with another severe weather outbreak in the southern states with showers and the potential for strong-to-severe thunderstorms.
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A cold front will slide across the region later today bringing with it the chance of showers and thunderstorms. Temperatures today will reach the middle 70’s, but then get knocked off by about ten degrees for tomorrow following the passage of the frontal system. Later in the week, it’ll turn warmer and more humid ahead of the next approaching system and this will raise chances once again for showers and thunderstorms in the region.
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As strong upper-level troughing reaches the middle of the country on Friday, it’ll help to intensify surface low pressure and draw moist air from the Gulf into the Tennessee Valley. As a result, the chance of shower and thunderstorm activity will increase here tonight and some of the storms that form can reach strong-to-severe levels. A frontal system will clear the area on Saturday, but it’ll remain quite windy and there can be some residual shower activity early. Nice weather is likely for Sunday and Monday with plenty of sunshine each day and high temperatures in the 70’s.
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We are now a few days into spring season and the active weather pattern that lasted through much of the winter across the nation looks like it can continue well into the month of April. California was pounded by yet another storm on Wednesday that the state brought heavy rain, significant snow, and even a rare tornado to the Los Angeles metro region. Some severe weather is possible later Thursday across Texas and Oklahoma, but it is even more likely from later Friday into Friday night across the Lower Mississippi Valley. Meanwhile, in the colder climate of the northern US, there can be accumulating snow this weekend in the Upper Midwest and then upstate New York/northern New England. And finally, while still in the speculation phase, this active weather pattern may result in strong new storms near both coasts by the middle of next week.
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A warm frontal system has passed to the north of the region and temperatures both today and Friday will climb into the upper 70’s for afternoon highs. As strong upper-level troughing reaches the middle of the country on Friday, it will help to intensify surface low pressure and to draw moist air from the Gulf into the Tennessee Valley. As a result, the chance of shower and thunderstorm activity will increase here on Friday night and some of the storms can reach strong-to-severe levels.
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Spring has officially sprung and there is some quite mild weather expected during the next couple of days in much of the eastern half of the nation. There are signs, however, that point to additional cold air outbreaks into at least the first week of April from the Northern Plains to the Mid-Atlantic/Northeast US. The overall weather pattern across North America still features some high-latitude blocking over northern Canada and Greenland and this, in turn, is allowing for the transport of colder-than-normal air masses on occasion into the northern US from Canada. One of the consequences of additional cold air outbreaks is the high likelihood for additional accumulating snow events across the northern states and also the threat for severe weather outbreaks in the southern US. This pattern of normal to below-normal temperatures has been pretty commonplace during the last ten years in the months of March and April in the region from the Northern Plains to the Mid-Atlantic/Northeast US.
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High pressure has pushed off the east coast and much milder air will push into the Tennessee Valley for tomorrow and Friday. After highs in the 60’s this afternoon, temperatures should soar to near 80 degrees on Thursday and Friday afternoons though there is the threat for some shower and thunderstorm activity. High pressure should dominate the scene as we begin the weekend and temperatures should be quite pleasant for this time of year on both Saturday and Sunday.
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High pressure over the Mid-Atlantic region will push offshore during the next 24 hours and this will open the door for much milder to push into the area from the southern states. As with most recent warm-ups, the milder weather in coming days will be accompanied by an increasing chance of showers and thunderstorms. Following the passage of a warm front, temperatures should surge to near 70 degrees on Wednesday afternoon and close to the 80 degree mark for highs on both Thursday and Friday.
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High pressure builds into the eastern states on Monday and then will shift offshore by mid-week. As a result, temperatures here will be on the chilly side as we start the new work week, but then climb towards the 70 degree mark by Wednesday afternoon for highs. A frontal system could bring some shower and thunderstorm activity here later in the week with even warmer conditions.
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