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Weather forecasting and analysis, space and historic events, climate information
Filtering by Category: HSV
A frontal system will stall-out in the eastern US stretching southwest-to-northeast from the south-central states to the Mid-Atlantic region. This frontal boundary zone will separate cold, dry air to the north and west and milder air to its south and east. A couple of low pressure systems will ride along this boundary over the next few days bringing us multiple chances for showers.
Read MoreHigh pressure will be in control around here today and into the upcoming weekend with moderately chilly conditions. It does become more unsettled later this weekend and during the first half of next week with the threat of showers on a daily basis.
Read MoreLow pressure will intensify over the northeastern states today and contribute towards windy, chilly conditions around here. Winds can gust to 25 mph or so and temperatures will be confined to the 40’s for highs for this afternoon and tomorrow afternoon. The next threat of showers will come during the latter part of the upcoming weekend and early part of next week.
Read MoreLow pressure pulls out of the southern states today and moves northeast to the Great Lakes with a secondary system likely to develop near the northern Mid-Atlantic coastline. This system will drag a cold front through the area and showers/storms are possible early in the day. Colder air will follow the frontal passage and highs will be confined to the 40’s on Thursday and Friday.
Read MoreA significant winter storm is developing today over Texas and this moisture-laden system will push northeastward over the next 24 hours bringing significant snowfall all the way from Texas to the Midwest. In the Mid-Atlantic region, snow is likely to break out on Wednesday morning in areas to the north of the PA/MD border and there can be some minor accumulations before a changeover to rain later today as milder air surges northward along the coast.
Looking ahead, widespread colder-than-normal air is going to push into the northern and western US early next week and it’ll likely spread into the Mid-Atlantic/Northeast US by late next week. Whether or not this change to colder-than-normal conditions is sustained in the Mid-Atlantic/Northeast US after next week will largely depend on the stubborn high pressure ridge aloft over the southwestern Atlantic/Southeast US. Elsewhere, there has been some amazing cold on the other side of the North Pole with the lowest temperature ever recorded in China on Monday and this follows some tremendous cold last week in Russia (Siberia). This frigid air is now spreading to the Korean Peninsula and on the way to Japan where there can also be some all-time low temperatures.
Read MoreThe next low pressure system begins to impact the region later today with thickening clouds and tonight will feature rain and increasingly strong winds. Low pressure pulls out of the southern states today and moves northeast on Wednesday to the Great Lakes region with a secondary system likely to develop near the Mid-Atlantic coastline.
Read MoreAs one storm continues to impact the Mid-Atlantic region with lingering rain and snow, the seeds for the next system are rolling through the southwestern states in the form of a vigorous upper-level low. This feature will drift into Texas on Tuesday and help generate surface low pressure and abundant moisture will feed into the system from the Gulf of Mexico. On Wednesday, this surface low pressure system will push northeastward with its large moisture field advancing to the Midwest and Mid-Atlantic. Another key player in the upcoming mid-week event will be strong high pressure that forms over southeastern Canada. This system will anchor an air mass that will be cold enough for widespread accumulating snow across the Midwest, interior Mid-Atlantic and Northeast US. There is likely to even be some accumulating snow at the onset in portions of the I-95 corridor of the Mid-Atlantic on Wednesday before the precipitation ultimately changes to plain rain.
Read MoreDry weather is in store for the region today with high pressure moving in; however, it won’t stay dry for too long. The next low pressure system begins to impact the region on Tuesday with an increasing chance of showers; especially, by the time we get to the nighttime hours. Low pressure pulls out of the southern states and moves northeast at mid-week to the Great Lakes region with a secondary system likely to develop near the Mid-Atlantic coastline.
Read MoreCooler air has moved into the Tennessee Valley following the passage of a cool frontal system and today’s highs will be close to the 50 degree mark across much of northern Alabama. It stays cool and dry going into the weekend, but the threat of showers will increase on Sunday and Sunday night with the next system headed our way.
Read MoreStratospheric temperatures have risen noticeably during the past couple of weeks in parts of the polar region in the Northern Hemisphere and indications are there will be changes of location of the polar vortex 10-15 days out. In addition, stratospheric warming looks like it could become centered right near or over the North Pole by the time we get into the early part of February. A stratospheric warming event such as this being forecasted could very well result in the displacement of cold air masses from the high latitudes into the middle latitudes sometime later in February.
In the short term, two storm systems are on the way for the Mid-Atlantic/Northeast US in the early and middle parts of next week. As has been the case in January, sufficient cold air for the generation of accumulating snow in the immediate I-95 corridor will be a struggle with both of these upcoming storms. Having said that, it looks like a close call in terms of at least some snow and/or ice in the I-95 corridor during either of these storms and any small change in the overall pattern can make an important difference. Odds do favor accumulating snow in the interior, higher elevation locations of the Mid-Atlantic/Northeast US during each of these storms next week.
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