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Weather forecasting and analysis, space and historic events, climate information
Filtering by Category: DC
Low pressure will pull away from the Mid-Atlantic coastline today and head towards the Canadian Maritimes. In its wake, it’ll be a windy and cold day as the month of November winds down. High pressure will build into the region and remain on control through the mid-week time period. Milder conditions are likely in the Mid-Atlantic region for Thursday following the passage of a warm front.
Read MoreThanksgiving Day will feature a warm up in the eastern states as a low-level southwesterly flow of air develops on the back side of high pressure off to the east. This warm up will be rather short-lived, however, as a strong cold front pushes through by early Friday. There can be a few showers with the frontal passage late tonight and early tomorrow, but this will not be a heavy rain event. The winds will become quite strong on Friday with gusts past 35 mph to go along with the colder-than-normal conditions. The weekend begins on the cold and dry side and then attention will turn upstream for the next in a series of disturbances that will drop south and east out of Canada into the US. The late weekend disturbance will be rather potent and it will come with a reinforcing cold air mass for the eastern states. There is the chance that this upper-level feature will be able to spawn the formation of surface low pressure near enough to the east coast for some snow and/or rain to fall across portions of the Mid-Atlantic/NE US in the Sunday/Monday time frame.
Read MoreToday remains colder-than-normal in the Mid-Atlantic/Northeast US, but conditions will be much less harsh than they were on Tuesday with little to no wind to speak of and plenty of sunshine. Milder weather pushes in on Thursday, Thanksgiving Day, but the warm up will be short-lived. Another cold air mass arrives on Friday in the northeastern quadrant of the nation and the big shopping day will become quite windy with gusts past 35 mph to go along with below-normal temperatures. It stays cold this weekend and there remains a threat for some snow in the Mid-Atlantic/Northeast US on Sunday and/or Monday.
Read MoreToday will be another cold day in the Mid-Atlantic region, but with much less wind than Tuesday so it’ll feel less harsh and it will certainly be a good day to travel with precipitation-free conditions. It turns slightly milder on Thursday with high temperatures likely to bounce back up into the middle 50’s, but the warm up will be brief. Another strong cold front pushes through the area by early Friday and it’ll turn out to be another cold and windy day as we end the work week. The weekend remain on the cold side and a couple of upper air disturbances will have to be closely monitored in coming days for possible impact during the early part of next week. If pieces fall into place at the right time, there could be some snow and/or rain shower activity in the region during the Sunday/Monday time frame…stay tuned.
Read MoreA strong cold front passed through the region early yesterday and ushered in a cold air mass for the region and it’ll stay windy and colder-than-normal today. While it stays cold on Wednesday, the winds will be far less of a factor and it’ll feel less harsh as a result. Thanksgiving Day actually turns a bit milder with highs back up in the 50’s, but then the next strong cold front will usher in another cold air mass for Friday and winds will be quite strong once again as we end the work week.
Read MoreOne cold air outbreak reached the Mid-Atlantic region late last week and another one is arriving today on increasing NW winds and a third one will arrive at the end of the week. In fact, it is possible that the only day of the next several that is at or slightly above-normal in terms of temperatures could be Thursday, Thanksgiving Day. While the overall pattern does favor additional cold air outbreaks for the Mid-Atlantic region in coming days, the chances for snow are more elusive. There is one system, however, that could become a player in about a week’s time and it will have to be monitored over the next few days for possible snow in the Sunday/Monday time frame. Looking ahead, one index known as the Madden Julian Oscillation (MJO) signals that cold air outbreaks may continue into the first half of December for the eastern half of the nation.
Read MoreA strong cold front is clearing its way off the coast this morning and the skies should clear later in the day with NW winds picking up as a fresh, cold air mass pushes into the region. It’ll stay cold and windy on Tuesday and then cold on Wednesday with less wind. Thanksgiving Day (Thursday) looks pretty decent with milder conditions and some sunshine before another cold air mass arrives on Friday following the passage of another cold front.
Read MoreA strong cold front passed through the region last night and today will turn out to be a windy and cold day in the Mid-Atlantic region with plenty of sunshine. Winds will be out of the northwest - perhaps gusting past 30 mph at times – and making it feel colder than the actual air temperature. The winds do die down later tonight and temperatures will drop into the upper 20’s for overnight lows – the lowest readings so far this season in some spots. It remains cold on Saturday, but the wind will be less of a factor compared to Friday. Another strong cold front will arrive by early next week with showers likely on Sunday night and Monday morning and this system will usher in the coldest air mass so far this season. By Tuesday, temperatures will be well below-normal, NW winds will be strong perhaps gusting up into the 40-50 mph range, and instability in the atmosphere could cause some snow shower activity in the Mid-Atlantic region. It looks dry for the busy travel days of next Wednesday and Thursday.
Read MoreThe warm up that began on Wednesday will peak this afternoon with temperatures climbing to 70+ degree just ahead of the next strong cold front. The passage of this next cold front will come with a few showers and it’ll usher in much colder air for Friday and there will be a noticeable NW wind to make it feel even colder than the actual air temperature. It remains cold on Saturday with the day likely starting in the 20’s in most spots, but the wind will be less of a factor compared to Friday. Another strong cold front will arrive by early next week with showers likely on Sunday night and Monday morning and this system will usher in the coldest air mass so far this season. By Tuesday, temperatures will be well below-normal and winds will be strong from the northwest and instability in the atmosphere could cause some snow shower activity in the Mid-Atlantic region. It looks quieter again for the busy travel days of next Wednesday and Thursday.
One final note, there will be a partial (almost total at 97%) eclipse of the moon very late tonight from 2:18 AM to 5:47 AM (with peak around 4:02 AM). This is actually going to be the longest partial lunar eclipse in nearly 600 years. It’ll be a close call with respect to the sky cover as clouds should gradually clear after midnight and it’ll be cold and windy.
Read MoreMilder air is pushing into the Mid-Atlantic/Northeast US today on the backside of high pressure over the western Atlantic and this warm up will peak on Thursday afternoon with high temperatures not far from the 70 degree mark in the DC-to-Philly-to-NYC corridor. The warm up will be rather short-lived, however, as a strong cold front moves through the region on Thursday night with some rain shower activity and Friday promises to be a windy and cold day with gusts past 30 mph. After a cold, dry start to the weekend, it’ll turn a bit milder on Sunday in the Mid-Atlantic/Northeast US, but then another strong cold front will arrive early next week and this system will usher in the coldest air of the season so far. By Tuesday, temperatures will be way below-normal and winds will be quite strong to go along with the possibility of some snow shower activity. After a couple of quieter days on Wednesday and Thursday (Turkey Day), yet another cold shot should work its way into the northeastern quadrant of the country as “high-latitude blocking” sets up to our north.
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