Hot weather dominated the scene today across the Mid-Atlantic and Northeast US and one of the ways to get relief is from a “conventional” cool frontal system that passes from west-to-east. However, long-time residents of the Mid-Atlantic and Northeast US know that one other way to get a break in the heat is for a back door cool front to slide from northwest-to-southwest which can produce dramatic temperature changes in a short period of time. That is exactly what happened today in Boston with a temperature drop of nearly 20 degrees in about 10 minutes and a big change is in store on Wednesday for New York City and New Jersey.
Read More
The combination of an increasingly humid air mass, strong surface frontal system and a vigorous mid-level low will help generate numerous showers on Friday and Friday night in the Mid-Atlantic region and possible severe thunderstorms. In fact, there may be two bands of thunderstorms to closely monitor during this event- one during the mid-day/early afternoon hours and a second during the late evening associated with the frontal passage. The main severe weather parameter threats will be damaging wind gusts, “flash-flooding” downpours, and isolated tornadoes are even possible. The upper-level low will be rather slow-moving from west-to-east and this is likely to result in an unsettled weather day on Saturday in the Mid-Atlantic region with scattered showers and strong thunderstorms. The upper-level will exit off the coast on Sunday resulting in improvement to end the weekend and the weather on Monday, Memorial Day, should feature plenty of sunshine, very warm conditions and highs well up in the 80’s.
Read More
A strong frontal system will produce another round of showers and thunderstorms in the Mid-Atlantic region on Friday and some of the storms can be on the strong-to-severe side. The upper-level support for this system will be slow-moving and could result in some residual shower activity on Saturday in the Mid-Atlantic region as it drifts overhead. This upper-level low will exit off the coast on Sunday resulting in improvement and then the weather on Monday, Memorial Day, should feature plenty of sunshine and highs in the 80’s.
Read More
The hottest weather of the spring so far is on the way for the Mid-Atlantic region with Friday, Saturday and Sunday promising to be noticeably different than what we’ve experienced in recent days. The transition to this uncomfortable weather pattern will actually begin later tonight with the arrival of low pressure and its associated warm front and there can be downpours in the Mid-Atlantic region along with embedded thunderstorms. Following the passage of the warm front, it’ll turn noticeably warmer and more humid later Thursday and the warm up will intensify on Friday and likely peak on Saturday afternoon with temperatures well up in the 90’s in many locations. A cool front closes in on the eastern seaboard late in the weekend bringing with it a renewed chance of showers and thunderstorms.
Read More
There are still cold air outbreaks destined to push into the US from Canada as we progress through the second half of May and even accumulating snow for the Rockies, but that doesn’t mean we can’t have a threat of a hurricane. In fact, there are signs that the atmosphere will become supportive of a tropical storm or hurricane in the Gulf of Mexico region later this month or early in June in what is likely to be an active season for the Atlantic Basin.
Read More
There is a severe thunderstorm threat in the Mid-Atlantic region for this afternoon and evening as a combination of ingredients will come together including the arrival of a strong cold front, high humidity and a vigorous disturbance in the upper atmosphere. The threat of severe weather includes the possibility of damaging wind gusts, hail and even isolated tornadoes from mid-day into the evening. Following the passage of the strong cold front, a much different air mass will push into the Mid-Atlantic for Tuesday and Wednesday with noticeably lower humidity and comfortable temperatures.
Read More
A soaking rain event is coming to the Mid-Atlantic region for Friday and Saturday and it’ll become quite cool and windy as well. Intensifying low pressure will cross over the Ohio Valley on Friday and then as it arrives the eastern US, it will begin to become influenced by building high pressure over southeastern Canada. As such, the low pressure will slow down in its advance to the east and ultimately will stall-out over the western Atlantic. The “blocking” type pattern that sets up in the upper atmosphere could prolong the chilly, damp weather into Sunday, Mother’s Day; especially, along coastal sections of the Mid-Atlantic. Later next week, the strong block will likely result in a retrogression of the stalled-out low pressure system and it likely moves from east-to-west and back to the east coast perhaps classified as a “sub-tropical” system.
Read More
An active weather pattern continues across the nation and the overall situation in the upper part of the atmosphere will take on a different twist later this weekend and next week. One of the reasons this pattern has been so active has been an on-going onslaught of colder-than-normal air masses from Canada into the US which adds to the possibility of severe weather outbreaks. One area of concern later today and tonight for the possibility of severe weather is the southern Plains with a focus of attention on Oklahoma and northern Texas. This “enhanced” severe weather threat will shift slightly to the east on Thursday. Looking ahead, very strong high pressure ridging will develop over southeastern Canada later this weekend and into next week and this setup could actually help to push an offshore stalled-out low pressure system back towards the west and to the east coast sometime later next week.
Read More
Temperatures could surge to 80 degrees this Sunday in parts of the Mid-Atlantic region, but as has been the case for much of the spring, this next warm up will not necessarily stick around for an extended period. In fact, signs point to another shot of cold air for the Mid-Atlantic region by the middle of next week and teleconnection indices suggest we may have to deal with unusually chilly air masses right into the first part of May with overnight lows in the 30’s.
Read More
A late season coastal storm will bring heavy rain to the DC-to-Philly-to-NYC corridor from later today through tonight, strong winds and potential flooding to coastal sections and accumulating to snow to interior, higher elevation locations of the Mid-Atlantic/Northeast US. In fact, it is not out of the question that some of the northern and western suburbs of the big cities along I-95 see ice pellets or even snow mixed in at times during this unfolding coast storm. An unusually chilly air mass is in place across the northeastern part of the nation, jet streaks will form at multiple levels of the atmosphere, and a vigorous disturbance aloft will all contribute to the formation of a significant storm that will have a variety of impacts over the northeastern quadrant of the nation. Cold air outbreaks from Canada into the central and eastern states have continued unabated in recent weeks and it looks like they will continue into late April and likely the early part of May.
Read More
