A powerful storm system will push towards the Great Lakes on Sunday with accumulating snow on its northwest side in places likely Chicago, Illinois and severe weather and downpours will be a threat in its warm sector to the southeast of the storm track. The threat for downpours and severe weather will be “enhanced” across the Ohio Valley on Sunday and indeed there can be some heavy rain and severe thunderstorm activity that works its way into the I-95 corridor from later tomorrow afternoon into early Monday - including the possibility of isolated tornadoes..
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The grass will certainly get off to a good start in the Mid-Atlantic region over the next few weeks as water will be quite plentiful – much as it was for all of the last growing season. The Mid-Atlantic region will get hit by back-to-back rain events in coming days and each one can result in some heavy downpours and perhaps even some strong thunderstorm activity. Looking ahead, there is even a good chance at a third significant rain event at the end of the next week for much of the eastern US including the Mid-Atlantic as the overall wet pattern shows no sign of slowing down.
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Low pressure will head over the Great Lakes region today and it’ll push a couple of frontal systems our way as we close out the work week. A couple of showers are possible today, but the main rain threat is coming tonight and there can be a thunderstorm mixed in as well - some of the rain can be heavy at times. Clouds and sun on Saturday ahead of the next low pressure system and a couple of lingering showers are possible to go along with quite warm afternoon temperatures. More rain is likely here from late Sunday into Monday and this next event can result in some heavy rainfall in the Sunday overnight hours and during the early part of Monday.
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High pressure will push off the east coast later today, but it should remain close enough for another rain-free day in the Mid-Atlantic region. Low pressure will move through the Great Lakes region on Friday and generate a round of showers here on Friday night along with the chance for scattered thunderstorms. The weekend is not looking too good as clouds will dominate on Saturday and lingering shower activity is possible. Another system will bring more rain here later Sunday into Monday and some of it can be heavy at times late Sunday night/early Monday.
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A cold front crossed the region late yesterday and ushered in cooler air for the mid-week with high temperatures likely to be in the upper 50's later this afternoon compared to the 70’s on Tuesday. After a decent day on Thursday, another frontal system will head our way on Friday and there will likely be another round of showers and possible thunderstorms on Friday night which should be followed by high pressure for Saturday and then more rain is likely from later Sunday into early Monday.
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A cold front will cross the region later today and there is the chance for a round of showers and thunderstorms during the late afternoon hours - some of the storms can be on the strong side. The frontal passage will usher in colder air for late tonight and Wednesday with high temperatures likely to drop from the 60’s today to the 50’s tomorrow. Another frontal system will arrive late Friday and there will likely be another round of showers and thunderstorms to end the work week which should be followed by high pressure for Saturday, but then more rain is likely on Sunday.
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After a decent and mild weekend, it'll turn even warmer as we begin the new work week with some sunshine afternoon highs well up in the 70's. There can be a shower or thunderstorm later today, tonight and on Tuesday, but much of the time will be rain-free. A cold front will usher in cooler air for the mid-week and then another system could bring us more rain by late Friday or Friday night.
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High pressure is pushing off the coast this morning and a slow-moving low pressure system will impact the region with some rainfall from later this morning into the late night and it’ll be noticeably colder as we close out the work week. This late week system looks like it will get out of here just in time to squeeze out a pretty decent-looking mainly dry and noticeably milder weekend before another system impacts the region early next week. It’ll stay quite mild on Monday and Tuesday and the combination of a warm front and a cold front will likely result in occasional showers on both days and perhaps a few thunderstorms mixed in as well.
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A slow-moving low pressure system will impact the region with some rainfall from early Friday into early Saturday and it’ll get noticeably cooler as we close out the work week. The late week system looks like it will get out of here in time to squeeze out a pretty decent weekend before another system produces more rain in the area from later Sunday night into Tuesday.
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The month of April began with a colder-than-normal air mass in the eastern US and it looks like we’ll have additional cold air outbreaks over the next couple of weeks or so. Teleconnection indices such as the Arctic Oscillation (AO) and North Atlantic Oscillation (NAO) both signal a sharp drop in coming days to negative territory which typically results in the penetration of cold air outbreaks from central Canada into the eastern US. Medium-range forecast maps of 500 mb height anomalies support this notion of additional cold air outbreaks as we progress through the month of April with “high-latitude blocking” in evidence over northern Canada and Greenland.
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