Tag Archives: subtropical storm

NYC Weekend Weather – Oct 18, 2019

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Soaking rains from Wednesday’s nor’easter have long since exited east, yet we will continue to feel the impact of this low with windy conditions to start the weekend. As the low continues moving east, an area of high pressure will build in and take its place. Winds will relax and we should enjoy a nice, sunny day for Saturday. Clouds are expected to build back in as a potential extratropical remnant low of what could become Subtropical Storm Nestor this weekend pass south of the region. Temperatures during this period are expected to be at or just below normal in the low-60s with a warm up going into next week.

Rest of today – windy conditions continue as the pressure gradient between a building area of high pressure to the west and the low that brought us rain Wednesday which is now over the Canadian Maritimes. High temperatures around 60°F with partly cloudy skies. Overnight lows expected to be quite cool, in the low-40s with skies looking to clear up and winds dying down – conditions that could lead to some strong radiational cooling.

Weather Prediction Center surface forecast for 8AM Saturday

Saturday – high pressure builds in and gives us a sparkling, sunny, fall day with high temperatures in the low-60s. Overnight lows milder around 50°F.

Sunday – although the extratropical remnants of what could be Subtropical Storm Nestor are forecast to pass well south of the area, this storm is expected to have a broad cloud shield to its north, and some outlying rain bands could even result in a couple scattered rain showers for the area. High temperatures should be similar to Saturday in the low-60s, because even with clouds, overall flow will be from the south. Overnight lows around 50°F again.

  • GOES satellite imagery of Potential Tropical Cyclone Sixteen
  • National Hurricane Center’s latest forecast track guidance for this storm

Monday – with this low exiting east, we’ll see more southerly flow ahead of the next incoming storm system. High temperatures should respond by warmingin into the upper-60s with mostly sunny skies. Overnight lows in the mid-50s with mostly cloudy skies.

NYC Weekend Weather – Oct 11, 2019

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The persistent storm off the Northeast US coast finally starts to move east. This storm has defied the odds, increasing in organization and intensity overnight, and has just been named Subtropical Storm Melissa. We will enjoy a spell of warming temperatures (from the low-60s into the low-70s) and dry weather leading into early next week as the region sits between the exiting storm and another strong low over the interior of North America. A couple of frontal boundaries will pass over, however, these will be starved of meaningful moisture and should not result in any rain.

Rest of today – mostly cloudy with high temperatures in the low-60s. Overnight lows in the low-50s as winds start to shift to the north due to Subtropical Storm Melissa continuing to move to the east.

Satellite imagery of the incipient Subtropical Storm Melissa

Saturday – mostly cloudy with high temperatures warming to around 70°F. Winds will diminish as Subtropical Storm Melissa finally starts moving east. Overnight lows in the low-50s.

NAM model output for 500 mb heights and wind at 2PM Saturday. A significant closed upper-low, largely cut off from westerly steering currents, will be over the Upper Midwest. A slow-moving, strong occluded low will accompany this upper low at the surface. East of this, there will be some slight ridging, keeping our weather fair.

Sunday – a weakening cold front moves through, but with lack of appreciable moisture, there shouldn’t be any rain. High temperatures will be similar to Saturday, around 70°F, with m ore sunshine expected. Overnight lows in the mid-60s.

Weather Prediction Center surface forecast for 8AM Sunday

Monday (Columbus Day) – the cold front that moves through overnight into Sunday is expected to stall and become stationary. A surface low is forecast to form and move along this boundary near the coast, leading to increasing clouds with high temperatures in the low-70s. Overnight with lows dropping into the upper-50s.

NYC Weekend Weather – Oct 20, 2016

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This week has seen unprecedented and record breaking warmth for the middle of October, with temperatures that were more indicative of mid-June. But this weekend, we’re about to get a dose of reality as temperatures drop dramatically to below normal levels, in some cases 25ºF cooler than mid-week. We get some chances for much needed rain as well with some uncertainty due to the interaction of a possible tropical/subtropical system.

Rest of today – cloudy with a high around 70ºF. Chance of rain late in the day and into the overnight hours.

Friday – chances for rain increase throughout the day and especially in the evening and overnight hours. Interaction with a possible tropical/subtropical system complicates the forecast in terms of where the heaviest rain sets up. High temperatures in the mid-70s and mostly cloudy.

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Saturday – the National Hurricane Center is monitoring an area of disturbed weather off the Bahamas that they’re giving a 50% of becoming a named tropical/subtropical system in the next few days. Regardless of whether a named storm forms, this system is expected to merge with an approaching cold front Saturday. This would give the cold front an extra shot of energy and moisture, though it would appear that the bulk of this moisture and rain falls well north of the area. Behind this cold front, the pressure gradient tightens and cold air rushes in from Canada, resulting in a blustery, though sunny, day with high temperatures struggling to hit 60ºF and a brisk northwest wind.

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Sunday – winds die down, and temperatures rebound to average levels in the low-60s under mostly sunny skies.

 

NYC Weekend Weather – May 8, 2015

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Another splendid weekend is in store for us with warm temperatures in the upper-70s and near 80. Subtropical Storm Ana marks the first named storm of the 2015 Atlantic Hurricane Season. It is not expected to bring us any direct impacts, however, it could bring moisture our way that could supplement a storm system forecast to pass through early next week.

Rest of today – early fog has burned off, skies have cleared, and temperatures should top out near 80. We have been under the persistent influence of a high pressure center that has been responsible for pumping in this warm, moist air from the south.

Saturday – clouds and sun, with sunny breaks more likely to appear near the coast in the afternoon. High temperatures should be a bit cooler in the mid-70s with the influence of clouds, however, any sunny breaks could easily shoot temperatures up a few degrees.

Sunday – once again, Sunday comes through as the best day of the weekend, with mostly sunny skies and highs in the low-80s.USA_East

Monday – clouds for the most part as a frontal boundary approaches from our north and west. High temperatures will still be quite mild with the influence of high pressure bringing southerly winds, expecting a high again near 80. Some chance for afternoon thunderstorms to develop as that frontal boundary nears.

Tuesday – probably our best shot at getting measurable rainfall as the aforementioned front passes through. Some left over moisture from Ana could work its way into this setup. Ahead of the front, temperatures should still rise into the upper-70s. It’ll be noticeably cooler for the second half of the week.

 

Subtropical Storm Ana

We have our first named storm of the 2015 Atlantic Hurricane Season which doesn’t officially begin until June 1st. Subtropical Storm Ana developed out of a weak tropical disturbance off of Florida. This just goes to show, a tropical cyclone can form under the right conditions at any time of the year.

Visible satellite loop of Subtropical Storm Ana this morning - Geostationary Satellite Server
Visible satellite loop of Subtropical Storm Ana this morning – Geostationary Satellite Server

Subtropical Storm Ana fortunately does not have much time to organize and intensify before it makes landfall on the coast of the Carolinas. This should limit any serious damage, however, these areas will likely experience prolonged high winds, torrential rain, and coastal flooding.

Global Forecast System ensemble forecast tracks for Ana
Global Forecast System ensemble forecast tracks for Ana