Category Archives: Weekend

NYC Halloween/Marathon/World Series Weekend Weather, Sandy Retrospective – Oct 30, 2015

After a brief warmup mid-week, we return to more seasonable fall weather for the weekend. Luckily, it appears that this weekend should be rain free, providing excellent conditions for Halloween revelers, Mets fans, and NYC Marathon runners alike. It was quite a different story 3 years ago this weekend, when the city and indeed the entire region was just beginning to comprehend the scope and magnitude of the destruction wrought by a once in 500 year storm: Hurricane Sandy.

Rest of today – sunny, with a high right around average at 60ºF. It will be a chilly evening with lows in the 40s. Temperatures during game time at Citi Field should be in the low-50s.

Saturday – cooler, with highs in the mid-50s, but again with plenty of sun with high pressure in the vicinity. Temperatures for trick-or-treaters out there should again be in the low-50s range tomorrow afternoon and early evening. Weather for World Series game 4 should also be in that low-50s range.

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Sunday – AM temperatures should at race time for the marathon should be hovering right around the 50ºF mark with only a light wind. High temperatures warm up into the low-60s later in the day with a warm front moving through. Temperatures won’t cool off that much during the early evening hours, so if the Mets do make it to game 5, conditions should be good for viewing the game. There is only a slight chance for showers overnight into Sunday.

Monday – clouds and sun on Monday with temperatures climbing into the low-mid 60s.

 

Hurricane Sandy Retrospective

Yesterday marked the 3-year anniversary of Hurricane Sandy’s landfall on the central New Jersey coast. Sandy was in many ways a uniquely devastating force of nature: as it matured, it’s size ballooned, allowing for it to push up a significant storm surge ahead of it. Unlike most mature tropical cyclones that reach the mid-latitudes, Sandy did not recurve out to sea and spare the East Coast. At these latitudes, the predominant wind patterns are from the west (the westerlies), and there’s usually a cold front that pushes tropical cyclones to the east. In Sandy’s case, a low pressure system to its northwest actually produced the opposite effect: Sandy was pulled to the northwest along the counterclockwise cyclonic flow around that low pressure system. This resulted in a historic landfall on costal New Jersey. As the forecast models came into consensus on this result, I began to fear for the worst. Because Hurricane Irene had passed the previous year with great hype, but minimal damage, I had a bad feeling that many New Yorkers would not heed the warnings about this monster storm, even though there was high confidence in an historic event about to unfold.

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A monster storm

Sandy’s landfall also coincided with a supermoon high-tide, which meant that its already significant storm surge was augmented that much more by the pull of the moon. This resulted in catastrophic storm surge inundation along a vast expanse of the Northeast. The geology and bathymetry of New York Harbor made it all the more susceptible to storm surge, as its funnel shape served to channel and amplify Sandy’s storm surge. The fact that Sandy made its land fall to the south of New York meant that its most damaging northeast quadrant (Northern Hemisphere cyclones get a boost in the northeast quadrant because the direction of winds in that quadrant coincide with the direction of the Earth’s Coriolis force) hit the city dead on. A record-breaking storm tied of 14 feet was recorded at The Battery in Manhattan, smashing the previous record of 10 feet.

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Scenes of utter destruction like the one below were commonplace. Over 100 deaths were recorded, with areas like Staten Island’s east coast and the Rockaways particularly badly hit. The costs of the damage ran over $60 billion dollars. To this day, many people’s lives still have not returned to normal, many are still not able to move back into their homes.

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On a personal level, I was very fortunate to be in a neighborhood that was left high and dry, and crucially with power. Along with thousands of other New Yorkers, I felt an urgent and compelling need to get out on the ground and help our neighbors who were hardest hit and who had lost so much. My wife, who had just started working at a new school, found out that week that one of her coworkers had been killed – crushed by a fallen tree – during the storm. My volunteer work after the storm took me to many areas of New York City that I had not explored before. I saw witnessed scenes that I will never forget. For me, this day will always entail with it a sense of grieving, and will alway serve as a reminder to remain vigilant, because the storm that we never thought would happen here did – and could again.

NYC Weekend Weather – Oct 22, 2015

The warm spell that we’ve enjoyed in the city up to this point will be ending tomorrow. While temperatures will cool off this weekend, we won’t be seeing anything close to the chilly lows we saw last weekend. We’ll have good weather Saturday before another cold front pushes through late Saturday into Sunday, which could spark off a few showers.

Rest of today – temperatures are surging into the mid-70s ahead of a cold front that will push through later today and overnight. There could be a small chance for showers associated with this cold front later, though it’s more likely this front will be dry.

Friday – high pressure builds behind this passing cold front. Cooler temperatures with highs only around 60 in the wake of this cold front despite plenty of sunshine.

Saturday – temperatures will be similar to Friday, but with clouds on the increase as another cold front approaches late Saturday. Some showers may occur with this cold front passing through overnight into Sunday morning.

Sunday – warmer with high temperatures in the mid-60s before the cold front passes. A chance of showers early, and the mostly cloudy.

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Fall Foliage

This weekend should have good conditions for anyone traveling upstate apple picking or viewing fall colors. Check out this map to see where the foliage has peaked.

NYC Weekend Weather – Oct 15, 2015

If you like crisp, cool, fall weather, then this coming weekend is for you. Following a cold front moving through tonight into tomorrow, temperatures this weekend will feel more like November than October, with highs only in the low-50s on Sunday. Depending on wind conditions, this Sunday and Monday morning may see the first frosts/freezes of the season. The cooler than normal temperature trend continues into Monday, but warmer temperatures return by mid-week next week.

Rest of today – an archetypal fall day with high temperatures right around normal in the mid-60s and a clear sky.

Friday – mostly cloudy to start the day with some very small chance at rain as a cold front passes over. Once the front clears the region, skies should clear and temperatures will actually be a bit warmer in the mid-upper 60s.

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Saturday – behind the cold front passing on Friday, temperatures take a plunge with gusty northwest winds flowing around an area of high pressure building to our west. High temperatures will probably not break 60ºF in the city, even cooler in the outlying suburbs.

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Sunday –  the airmass associated with this high pressure will likely set off the first snows of the season in parts of the Upper Midwest. Not surprisingly, this will translate to chilly temperatures Saturday night, Sunday and Monday. Lows overnight into Sunday will be in the upper-30s in the city (brrr). Frost may develop on Sunday morning in interior areas, ending the growing season. High temperatures Sunday will struggle to hit the mid-50s in the city.

Monday – basically a repeat of Sunday, same crisp, cool conditions with high temperatures in the mid-50s.

NYC Weekend Weather – Oct 7, 2015

The three day weekend ahead will feature some idyllic autumn weather with plenty of sun for outdoor activities if you’re heading out of town on a getaway. The only blemish in this otherwise stretch of superb weather will be a round of showers and thunderstorms entering the city Friday afternoon and passing through Friday night.

Rest of today – we’re starting off with mostly cloudy skies, but skies should clear rapidly within the next couple hours. After that, we get a mostly sunny afternoon with high temperatures near 70. Clouds re-enter the picture later this evening in advance of an approaching disturbance that will bring us rain on Friday.

Friday – overnight tonight, a warm front will push through the area, such that by Friday morning, winds will switch to the southwest. This will allow for warm air to surge up ahead of a cold front that will be passing through Friday night. This setup is favorable for the possible development of thunderstorms ahead of the cold front. Chances for rain increase steadily Friday into Friday night. Otherwise, mostly cloudy skies with high temperatures in the upper-70s to near 80.

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Saturday – the cold front moves quickly through the area Friday and by Saturday, skies should clear up, while temperatures cool off into the mid-60s.

Sunday – another picture perfect autumn day with high temperatures in the mid-60s and ample sunshine.

Monday (Columbus Day) – stretch of nice weather continues into Columbus Day, with temperatures slightly warmer in the upper-60s to around 70.

Drought Update

The drenching rains two weeks ago helped alleviate drought conditions over large portions of the Northeast. However, moderate drought conditions stubbornly persist in the NYC metro area, especially in Long Island.

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NYC Weather Update – Hurricane Joaquin in the Picture? – Oct 1, 2015

This week of damp, grey weather is leading up to a weekend when the uncertain future of Hurricane Joaquin may have an enormous impact on our weather. Since its formation earlier this week, Hurricane Joaquin has intensified steadily into a Category 3 storm currently spinning around the Bahamas. Joaquin’s future is still highly uncertain, and there’s been considerable spread between major forecast models as to where the storm will be at the end of the weekend. At this point, a landfall in the NYC region late this weekend is not out of the question.

Rest of today – cloudy and cool with high temperatures only in the mid-60s.

Friday – rain at times, windy and raw, with northeast winds in the 20-25mph range. It will feel like November with highs only in the mid-50s.

Saturday – similar to Friday in terms of sensible weather, with highs only in the upper-50s.

Sunday – this is where things get interesting depending on the track of Hurricane Joaquin. Depending on how closely Joaquin comes to hitting us, we could be looking at tropical storm conditions building through the day. If, on the other hand, it recurves out to sea, Sunday could be the best day of the weekend.

The Big Question: Where’s Joaquin Going?

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Currently, Joaquin is a Category 3 storm over the Bahamas, with noticeable central eye, and symmetrical outflow in satellite images. Joaquin has been moving southwest along the edge of a subtropical ridge. Joaquin is an environment favorable for continued intensification, sitting over some very warm water with moderate wind shear.

Forecast Track

Over the last couple of days, forecast models have been set in basically two camps, one curving Joaquin northwest into North Carolina or Virginia. The other camp continues to point to a recurvature of Joaquin. Given the large spread between the models, National Hurricane Center forecasters have been emphatic about the degree of uncertainty with the track forecast up to this point.

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Some major forecast models’ track forecasts for Joaquin
Official NHC track forecast
Official NHC track forecast

Potential Impacts

Regardless of the landfall point for Joaquin, it will be contributing to a plume of tropical moisture leading to widespread heavy rainfall over a large portion of the east coast.

With the persistent northeast winds ahead of the northward advancing Joaquin, coastal flooding is also likely to take place in flood prone areas.

5 day rainfall totals
5 day rainfall totals

 

NYC Weekend Weather – Sept 25, 2015

Missed a couple updates the last week or so. The weather has been fairly uneventful during this stretch, with the second week of September featuring much above temperatures, while this past week has been more seasonable with respect to temperatures. This weekend, the pleasant, fall-like weather continues, with Saturday being the better half of the weekend.

Rest of today – high clouds have decreased in coverage somewhat since earlier this morning, but with an area of low pressure off the Southeastern US edging northward, cloud coverage may increase again later today. There’s also an onshore flow pattern with wind coming from the northeast, which will keep high temperatures suppressed in the low-70s.

Saturday – Canadian high pressure builds north of us, keeping the area of disturbed weather that’s moving northward from the Southeast at bay. This should result in a mostly sunny day. However, with the high pressure center to the north, onshore winds will continue from the northeast, leading to high temperatures again only in the low-70s.

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Sunday – the high pressure above will move southeast offshore of New England by the end of the day Sunday. With the high out of the way, the low pressure to its south will be able to develop again. This should yield a mostly cloudy day with the possibility for rain later in the evening hours. High temperatures remain on the cool side in the low-70s.

Monday – the chance for rain increases Monday with the high pressure completely out of the picture and low pressure moving in. This rain is much needed as a moderate drought persists in the NYC region (in particular Long Island). High temperatures will be warmer with winds from the southwest, temperatures may approach 80.gfs_namer_066_1000_850_thick

Regional Drought Worsens

The tradeoff for the long stretch of dry and pleasant weather is that moderate drought conditions have returned to areas which had been close to being drought-free last month. Moderate drought has redeveloped over much of the NYC metro area, while a persistent drought has continued to affect eastern Long Island. In fact, since August, the percentage of New York State affected by moderate drought has more than doubled.

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NYC Weekend Weather – Sept 10, 2015

Some much needed rain is falling today, with another round of rain coming this weekend. Friday and Saturday look to be the best days out of the stretch, while Sunday has the best chances for rain. The tradeoff for this wet weather will be noticeably less humid, cooler, and more seasonable conditions to start off next week.

Rest of today – we are currently in a dry pocket which should last through the late afternoon hours. The cold front that is initiating these showers and scattered thunderstorms will be slow to move through. A low pressure center that is riding along the frontal boundary is currently parked over us, and as this low continues to move off to the northeast, additional rain is expected develop and wrap around the backside of the low. With this low and the front lingering, we will likely get another round of widespread showers with some heavy downpours possible again later this evening and into the overnight hours. With the rain and cloud cover, highs will only reach the upper-70s before dropping back down.

Friday – once the low pressure and cold front have passed, conditions should begin to improve quickly. There’s a lingering chance for showers in the morning, but by the afternoon hours skies should be clearing with high temperatures around 80.

Saturday – another cold front and low pressure will follow on the heels of today’s system. The timing of precipitation with this system appears to be trending towards late Saturday evening, and primarily overnight into Sunday. This should allow for a mostly sunny day with temperatures again around 80.

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Sunday – showers appear to be likely on Sunday, with an isolated thunderstorm possible as well. High temperatures will be in the upper-70s with the clouds and rain.

Monday – once the storm system passes on Sunday, high pressure building to our southwest will allow cool, dry air from Canada to flow into the area, resulting in temperatures again in the upper-70s, but with mostly clear skies.

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NYC Labor Day Weekend Weather – Sept 3, 2015

The holiday weekend opens up with a break in the heat, but the relief doesn’t last long before the heat gets turned back on in time for Labor Day itself. We get a chance for a few scattered thunderstorms overnight tonight. Otherwise, dry conditions prevail over the medium to long term.

Rest of today – hot and humid with highs in the low-90s under hazy and cloudy skies.

Friday – a cold front forecast to pass through the area from the north tonight could touch off only a few scattered thunderstorms, since conditions are unfavorable for widespread coverage. The day starts off overcast but as cooler, relatively drier air moves in behind the cold front, skies should begin to clear from east to west. High temperatures will be significantly cooler in the low-80s.

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Saturday – the break in the heat gives us probably the best day of the weekend with comfortable high temperatures in the low-80s and lower humidity along with plenty of sun. This is due to high pressure building over the area.

Sunday – as the high pressure moves offshore and southeast, it allows a warmer, more humid tropical airmass back into the region, heralding a return to very similar weather conditions as what we’ve experienced this week. Highs will climb back up into the upper-80s under sunny skies.

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Labor Day (Monday) – the heat and humidity persists, giving the Caribbean Day Parade an appropriately tropical feel. Temperatures should again reach into the upper-80s with mostly sunny skies.

NYC Weekend Weather – Aug 27, 2015

We have a simply splendid weekend on tap. Temperatures will be on the upward trend through the end of this week and into the weekend. The warm trend will continue into the beginning of next week, along with a return of more humid, dog days of summer type weather. Keeping an eye on the tropics, a great deal of uncertainty surrounds the future of Tropical Storm Erika, which could effect the U.S. East Coast in the long term.

Rest of today – beautiful, sunny skies with high temperatures in the low-80s. High pressure to the west is firmly in control, delivering this pleasant, seasonable weather.

Friday – almost a carbon copy of today, high temperatures in the low-80s with even fewer clouds as the high pressure center will be parked right over us.

Saturday – as the high pressure from the end of the week moves offshore and weakens, a subtropical high pressure center begins to take to control. This setup favors a warmer, more humid regime. Winds will shift to the southwest and temperatures will begin to climb into the mid-upper 80s.

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Sunday – a longer term trend of warm and humid weather, typical of late summer, will continue Sunday. Temperatures will again be in the upper-80s. This trend looks to continue well into next week.

Tropical Storm Erika

A tropical wave that moved offshore of West Africa late last week has tracked across the Atlantic, strengthening along the way to become the fifth named storm of the 2015 Atlantic Hurricane season. Tropical Storm Erika, like its predecessor Danny, is having trouble maintaining its strength due to the influence of dry air and hostile northwesterly wind shear. Due to this shear, Erika’s center of circulation is actually still somewhat exposed (see below), and displaced away from its area of heaviest thunderstorms, which is concentrated in the southeastern quadrant of the storm.

The long term prospects for the storm are highly uncertain due to a number of factors. Erika looks to be tracking over Puerto Rico and may interact with Hispaniola (bringing much needed rain), which would significantly weaken the already feeble storm. This could lead to it dissipating entirely. However, should the storm make it past this area of high wind shear and possible land interaction, it’ll end up in the very warm waters around the Bahamas. This would provide the fuel for it to intensify quickly into a hurricane which could then threaten Florida and the East Coast. Definitely worth keeping an eye on.

Satellite image of Erika, with exposed center of circulation circled in red
Satellite image of Erika, with exposed center of circulation circled in red

NYC Weekend Weather – Aug 20, 2015

Unsettled weather will be a trend for the end of this week and into the weekend as a cold front pushes through the region. Friday is shaping up to be the worst day with heavy rain with a risk for flash flooding. Conditions improve somewhat Saturday and Sunday, although a chance for showers and thunderstorms cannot be ruled out either day.

Rest of today – slight chance of showers or thunderstorms persists through this afternoon, though the best chances remain west of the Hudson, as was the case yesterday. We’ve hit a humid highin the mid-80s with a mix of sun and clouds above.

Friday – a cold front will be pushing through during the course of the day Friday. As the frontal boundary approaches overnight and into the early morning hours Friday, a slow moving band of heavy rain is expected to form and track from north to south across the area. It appears likely that the heaviest rain will fall in a narrow band during the early morning hours, and that things may already be drying out by the AM rush. High temperatures will be cooler than average with the cloud cover and rain, near 80.

Satellite image of the storm that will be bringing us some heavy rain Friday
Satellite image of the storm that will be bringing us some heavy rain Friday
High resolution rapid refresh simulated radar for 3AM EDT Friday
High resolution rapid refresh simulated radar for 3AM EDT Friday

A chance for showers and thunderstorms continues through Friday. By the end of the day, some areas could pick up between 1-2″ of rain, raising the risk of some flash flooding.

Saturday – although high pressure will be building once the cold front passes on Friday, a chance of showers and thunderstorms continues on the backside of this front. Temperatures will again be below normal with mostly cloudy skies and a high in the low-80s.

 

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Sunday – showers and thunderstorms cannot be ruled out for Sunday, which will end up being nearly identical to Saturday in sensible weather with high temperatures in the low-80s and mostly cloudy skies.