Tag Archives: high pressure

NYC Weather Update – Jan 23, 2017

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Main weather headline to start the week will be a potent and slow-moving coastal storm bringing a variety of hazards to the region later today through tomorrow morning. This storm is the same one responsible for this weekend’s deadly tornado outbreak down south. Conditions improve dramatically towards mid-week.

Rest of today – a flood watch, coastal flood advisories, and high wind warning are in effect mostly through tomorrow morning. Cloudy with high temperatures steady around 40°F. Winds continue to increase throughout the day as a strengthening coastal low approaches and the pressure gradient between it and a high pressure center over Quebec tightens. A low-level jet will enhance winds. Sustained east and northeast winds of 30-40mph with gusts between 50-60mph will become commonplace late today and overnight. The strongest winds will occur closest to the coast.

Along with the strong winds, periods of heavy rain will bring the potential for 1-3″ of precipitation, which could lead to minor to moderate urban and small stream flooding. Timing of the onset of rain will be around 3pm this afternoon.

The persistent and strong northeast winds off the water will contribute to minor to moderate coastal flooding. This will be exacerbated during a couple of high tide cycles.

High resolution rapid refresh model simulated radar output for 3PM this afternoon
The storm approaching spans the better portion of the entire East Coast

Tuesday – rain and wind abate during the day, tapering off by the afternoon. High temperatures about the same as today in the low-40s.

Wednesday – as the coastal storm continues to pull away, temperatures rebound and mostly sunny skies return. High temperatures anticipated around 50ºF.

Thursday – another nice day with high temperatures in the upper-40s and mostly sunny skies.

 

NYC Weekend Weather – Jan 20, 2017

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We get a round of light rain late today and overnight. Temperatures warm up Saturday, then moderate Sunday as a storm system approaches from the southwest. Temperatures will remain above normal as this storm system looks set to bring soaking rains Sunday and Monday.

Rest of today – cloudy, with light rain arriving around 3PM and lasting till about midnight. Temperatures will drop from the mid-40s to low-40s overnight.

Saturday – warm, mostly cloudy, with high temperatures in the mid-50s.

Sunday – chances for rain increase in the afternoon. Mostly cloudy otherwise with a high in the upper-40s.

Monday – a low pressure system will be moving off the shore of North Carolina and Virginia. With this strengthening low and a high pressure center over Quebec, a tightening pressure gradient will build resulting in steady and increasing winds. Rain and wind will be constant on Monday with high temperatures in the mid-40s.

Drought Update

Recent storms have brought beneficial rains and snows to the region, but a drought continues, especially in the downstate area. This next storm should continue to help alleviate the drought here.

NYC Weather Update – Dec 19, 2016

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We leave behind wild temperature swings that occurred the last few days as high pressure maintains steady and sunny conditions for most of this week. High temperatures should run just a few degrees above average, with some chance for passing showers on Thursday.

Rest of today – cold with below average high temperatures in the low-30s.

Tuesday – slightly warmer, but still below average with high temperatures in the upper-30s.

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Wednesday – warmer with high temperatures in the mid-40s.

Thursday – a chance for showers as a weak storm system passes by, with a high again in the mid-40s and mostly cloudy skies.

NYC Weekend Weather – Dec 15, 2016

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Apologies for the lack of updates recently. Winter weather has come in full force a few days ahead of the actual Winter Solstice. We’ll see possibly record-tying or record-breaking cold Friday in some parts of the area, our first measurable snowfall in the city this season, all while temperatures swing about 30ºF from now through Sunday. The medium term shows a continuance of average to below-average temperatures in the upper-30s and low-40s.

Rest of today – we had some passing snow showers this morning, and there will be another chance for snow showers this afternoon. The main story will be the wind, cold temperatures, and low wind chills. A wind advisory is in effect for today with a high wind warning in place for tonight. Sustained winds of 20-30mph are expected, with wind gusts between 40mph to as high as 60mph possible later. Combined with high temperatures only in the mid-20s, this will result in wind chills of between 0-10ºF in the city.

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Friday – slightly colder than today with highs in the mid-20s, with a very cold start to the morning as overnight lows drop into the teens. Winds will slowly abate through the course of the day as the high pressure center depicted above moves east over us, lessening the pressure gradient. Overnight Friday, a warm front approaches and brings the possibility for 1-2″ of snow.

Saturday – the snow will continue into the first half of Saturday with the possibility of 1-2″ additional inches of accumulation before temperatures warm and winds turn towards the southwest. There is some question as to whether some period of freezing rain will occur before a transition to all rain from south to north in the afternoon hours. High temperatures rebound nicely into the upper-40s in the wake of the warm front passing through.

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Sunday – a cold front will follow the passage of the warm front mentioned above, but that shouldn’t happen until late Sunday. Ahead of that cold front passing, temperatures will continue to warm into the low-mid 50s as rain continues to fall. That snow won’t stick around long!

NYC Weekend Weather – Nov 18, 2016

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An extended period of well above normal temperatures comes to an abrupt end this weekend as a strong cold front pushes through overnight Saturday into Sunday. On the back side of this frontal boundary, temperatures will average around 15ºF lower than we’ve seen this week. If you like it mild, go out and enjoy this weather before Saturday!

Rest of today – sunny and mild with high temperatures in the low-60s.

Saturday – another mild day on tap with lots of sun and a high around 60ºF. Chances for rain increase into the overnight hours, at this point peaking around midnight. Winds will pick up first from the southeast ahead of the cold front, then to the west. Sustained winds of 15-20mph with gusts over 30mph are possible.
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Sunday – rain chances taper off but winds remain in the 20-30mph with strong gusts up to 40mph. High temperatures will be significantly colder than we’ve gotten used to and below normal in the mid-40s. A tight pressure gradient sets up between the departing low and a high pressure center to the southwest, blasting us with cold Canadian air as a result.

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Monday – clouds diminishing gradually, winds still pretty breezy, and a high only in the low-40s.

 

NYC Weather Update – Nov 14, 2016

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The beginning of the week will see much needed rain, and then transition to sunny and above average weather. Drought conditions have improved in New York State overall, though most of the improvement has been concentrated upstate.

Rest of today/overnight – rain begins to move in to the area overnight. Because of the very dry air that was in place to end the weekend, it will take some time before the moisture associated with a coastal low can saturate the air. It appears the most likely time for when heavier/steadier rains begin is around 4AM.

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Tuesday – rain, moderate to heavy at times in the morning. Northeast winds around the coastal low responsible for the rain will keep temperatures cooler than normal in the low-50s with cloudy skies. Rain chances diminish substantially in the afternoon.

Wednesday – a small chance for lingering drizzle on Wednesday as temperatures rebound back into the upper-50s. Clouds will be on the decrease.

Thursday – sunny, with a high near 60ºF. High pressure takes over to to end the week.

Drought Improves Upstate, Still Severe in and Around NYC.

Recent rains have improved the drought situation for many portions of upstate New York, and also some areas of the city and Long Island. However, as you can see from the image below, much of the area is still gripped by severe drought.

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NYC Veterans Day Weekend Weather – Nov 10, 2016

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After some needed rain yesterday, we move back into a pattern of dry weather that will be in place until at least mid-week next week. Temperatures will be the coldest this season on Saturday behind a cold front, then rebound to above normal for the remainder of the period.

Rest of today – clearing skies with temperatures dropping into the mid-40s overnight. Winds pick up from the northwest.

Friday (Veteran’s Day) – high temperatures in the upper-50s. Clouds increasing with an approaching cold front, but no rain is expected due to lack of enough moisture. Windy, with a northwest wind 15-25mph.

Saturday – overnight lows Friday will be the coldest yet for the city right above freezing. Temperatures do not rebound much Saturday even with lots of sun. Highs may not even hit 50ºF. Winds abate somewhat, but still in the 10-15mph range.

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Sunday – this high pressure will slide towards the southeast by Sunday. Return flow around the western edge of the high pressure will shift winds more to the west/southwest allowing warmer air in and high temperatures around 60ºF.

NYC Marathon Weekend Weather – Nov 4, 2016

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This weekend’s weather offers a significant contrast from last weekend, when we received a couple rounds of substantial rainfall. This is good news for the many thousands of runners and fans of the TCS New York City Marathon. High pressure is in firm control of the weather for almost the entire Eastern US. One additional reminder that Sunday morning marks the end of Daylight Savings Time, so remember to set you clocks back an hour and enjoy an extra hour of sleep.

Rest of today – sunny, with some wind gusts in the 20mph range, but otherwise pleasant with high temperatures around 60ºF.

Saturday – sunny again, though a little bit cooler with high temperatures in the upper-50s.

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Sunday – temperatures at the start time for the marathon should range in the upper-40s. High temperatures should max out around the mid-50s, so during most of the race, expect temperatures in the low-50s. There will be a modest north wind, between 10-15mph.

Monday – another crisp, dry, sunny fall day on tap with high temperatures in the mid-50s.

 

NYC Weather Update + Winter Outlook – Oct 24, 2016

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Autumn weather is here in earnest. In a remarkable change from last week, we’ll see high temperatures below normal for most days. Temperatures will range 30ºF cooler than this time last week. As we look ahead towards the winter, there are mixed signals about whether this will be a cooler, warmer, or average winter.

Rest of today – sunny, breezy, with a high near 60ºF. Northwest winds around 15mph, gusting to 30mph.

Tuesday – mostly sunny, breezy again especially later with northwest winds again between 15-20mph. Cooler, with high temperatures in the mid-50s. With the wind, it will feel quite cool for this time of year.

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Wednesday – winds should ease up a bit, but will be cool again with high temperatures potentially only in the low-50s.

Thursday – temperatures rise back into the mid-50s with the approach of a storm system from the west that should bring a chance for rain, increasing through the day.

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Winter Outlook

Meteorologists are less confident that we’ll have a La Niña this coming winter, which makes the winter climate outlook more uncertain. There are indications that temperatures may be a bit milder overall. However, that doesn’t preclude the possibility of some serious cold spells also.

There are conflicting forecasts that call for a colder than normal winter also, which you can read about on Weather Underground. Unfortunately, there is no indication we’ll get above average precipitation, which would be welcomed considering most of the Northeast is still dealing with an increasingly serious drought.

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NYC Weekend Weather + Hurricane Matthew Update – Oct 6, 2016

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The main weather headline for this weekend was going to be about possible impacts from Hurricane Matthew. I’m glad to report it now appears the storm will miss us, but the good news for us translates for doubly bad news for Florida. We went from a possible hurricane/tropical storm impact this weekend to a weekend where we expect to see some decent, fall-like weather.

Rest of today – sunny with a high temperature in the low-70s.

Friday – sunny, slightly warmer with highs in the mid-70s. High pressure remains anchored over the area, blocking the progress of Matthew northward, and also giving us great weather.

Saturday – a cold front will approach from the west, clouds will increase overnight and there is a chance for rain on Saturday. Mostly cloudy otherwise with highs in the low-70s. Part of the reason Matthew is expected to miss the Northeast is because this frontal boundary was faster to approach than was forecast earlier. This means it will have a role in pushing Matthew out to sea, instead of lifting it north towards the coast here.

Sunday – noticeably cooler with below average high temperatures only in the mid-60s and skies clearing.

Hurricane Matthew No Longer a Threat to the Northeast – Could Hit Florida Twice

As of 11AM EDT, the National Hurricane Center‘s advisory showed that Hurricane Matthew had restrengthened into a robust Category 4 storm with maximum sustained winds of 140mph. It had just moved past New Providence island in the Bahamas moving northwest at 14mph, having avoiding a direct landfall on the highly populated island where the capital Nassau sits. However, as we get more information in, it’s becoming clear that some areas of Haiti really got the worst case scenario. This video footage from the small town of Jeremie on the northern side of the western tip of the Tiburon Peninsula shows the catastrophic damage Matthew caused. Jeremie took a direct hit from the storm’s northeastern eyewall, the strongest part of the storm, as Matthew made landfall on Haiti as a Category 4 with 145mph winds. This gives you an idea of the raw power of the storm that’s now headed for Florida.

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Satellite image of Matthew at 11AM EDT October 6th, 2016. Below: radar imagery from Miami shows Matthew’s eye.

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Outlook for Matthew

Luckily for us, long-range forecast models show that Matthew no longer poses a threat to the Northeast. The flip side is that a fairly unprecedented scenario might befall Florida. Some models are suggesting that after Matthew moves offshore of the Carolinas, it may execute a large cyclonic loop, with the possibility of making a second landfall on South Florida later next week, albeit as a much weaker storm. First, Floridians all up and down the east coast, will have to contend with a dangerous Category 4 storm scraping along the shore or maybe making direct landfall. The coast scraper scenario would result in worse outcomes for Georgia and South Carolina, since reduced interaction with land will mean a stronger storm, as well as higher storm surge.

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