A soaking rain event is headed to the area for the upcoming weekend and it should result in 1.5-2.5 inches of rain by the end of the weekend. The heaviest rain will likely occur late tomorrow night and early Sunday, but this will be a rather long precipitation event with about a 24-hour period of rainfall from late Saturday to late Sunday. High pressure pushes off the east coast today and this will open the door for Gulf of Mexico moisture to ride northward from the Deep South towards the Mid-Atlantic. In addition, Atlantic Ocean moisture will feed into this slow-moving low pressure system as low-level winds turn to an east-to-southeast direction early this weekend. It’ll turn slightly milder later today compared to yesterday, but there will be plenty of clouds around as a weak disturbance passes by to our north. Even milder air moves in for the weekend to accompany the soaking rain event and temperatures should pass the 50 degree mark by Sunday afternoon.
Read More
It has been very dry in recent months across the DC metro region and drier-than-normal in the Philly and NYC metro regions, but a soaking rainfall is headed this way for the upcoming weekend and that, combined with rains earlier this week, should help alleviate some of the dry conditions in the area. Moisture-laden low pressure will slowly ride up along a frontal boundary zone this weekend from Texas to the Northeast US and by the time the weekend ends, many spots in the DC-to-Philly-to-NYC corridor could have received two or more inches of rainfall.
Read More
Low pressure has pushed away from the region and high pressure will take control with cold, breezy and dry conditions. Temperatures will struggle to reach the freezing mark for afternoon highs, but we’ll begin to turn milder on Friday and then even warmer this weekend. Unfortunately, the weekend warm up will coincide with some rain later Saturday into Sunday.
Read More
The rain is already beginning to wind down in the DC metro region and will do so over the next few hours in Philly and NYC, but our troubles may not be completely over at that point in time. Temperatures will drop quite a bit in the overnight hours and any standing water that remains on untreated surfaces will freeze later tonight with low-to-mid 20’s likely by the early morning hours. The prospect of isolated areas of black ice late tonight could even result in more of the now widely utilized "2-hour school delay" for Thursday.
Read More
One of the ways to monitor the potential for wintertime Arctic air outbreaks in the central and eastern U.S. is to follow what is happening in the stratosphere over the Northern Hemisphere. Sudden Stratospheric Warmings (SSWs) are large, rapid temperature rises in the winter polar stratosphere, occurring primarily in the Northern Hemisphere, and these events have been found to set off a chain of events in the atmosphere that ultimately can lead to Arctic air outbreaks for the central and eastern US that drop southward from northern Canada. Indeed, there is a significant stratospheric warming event now unfolding that will soon result in a dominant polar vortex center over North America - somewhat similar to a major SSW event that took place in January 1985. In that particular year, the major SSW event was soon followed by a period of extreme cold in the central and eastern US.
Read More
Low pressure will move from southwest-to-northeast today parallel to Route I-95 and this will allow for some milder air to push in from off the ocean changing any frozen precipitation this morning to plain rain for the afternoon hours. Before the changeover takes place, there can be small snow, ice accumulations on the order of an inch or so with the greatest probability to the north and west of the metro area. After the rain winds down tonight, temperatures will drop well down in the 20’s and black ice can form in the wee hours of the morning on untreated surfaces. Thursday promises to be a cold, breezy and cold day with temperatures struggling to pass the freezing mark.
Read More
The overall weather pattern is not too different from what we saw on Sunday and a combination of snow, ice and rain is headed to the I-95 corridor for Wednesday. Low pressure will slide from southwest-to-northeast on Wednesday just to the northwest of the I-95 corridor and given that track, milder air should push in off the ocean to change any AM frozen precipitation to plain rain for the PM hours. There will likely be some snow accumulation early tomorrow throughout the Philly and NYC metro regions and perhaps a coating in the northern and western suburbs of DC. Black ice is a threat for late tomorrow night/early Thursday as temperatures will drop well below freezing in the overnight hours following the PM rainfall.
Read More
Low pressure will move close by on Wednesday from southwest-to-northeast and a combination of snow, ice and rain is likely once again in the I-95 corridor. Snow could arrive towards morning and continue early tomorrow before a change to a wintry mix and then to rain for the afternoon. An inch or two of snow accumulation is possible before the changeover takes place. Rain winds down tomorrow night and it could end as brief period of freezing rain; watch for black ice late tomorrow night/early Thursday.
Read More
Super Bowl Sunday featured a combination of snow, ice and rain and we may have something somewhat similar to this on Wednesday, but in this case there may be a bit more snow on the front end in areas north of the PA/MD border. Low pressure will move southwest-to-northeast during the day and frozen precipitation is possible at the front end of this event and can’t be ruled out on the back end as well with plain rain likely in between.
Read More
High pressure will build into the region today and it’ll stay in control into mid-week. Temperatures will stay on the cold side with highs both today and Tuesday confined to the 30’s and then attention will turn to our southwest as moisture will be heading our way. Precipitation is likely here on Wednesday and it could be a repeat of Sunday with snow or a wintry mix followed by rain. Cold and dry weather is likely to follow for the latter half of the work week.
Read More
