Tag Archives: cold front

NYC Weather Update – Jul 18, 2016

NYC, Rain, Thunderstorms, Weather Update, , , , , , , ,

This week will be bookended by hot weather, with a break from the heat forecast right in the middle. The only chance for rain during this stretch will be later this afternoon and into the early evening hours.

Rest of today – the Storm Prediction Center has placed parts of the region under a slight risk of severe weather today as a cold front approaches. As usual, areas north and west of the city are more likely to experience organized convective activity, since there will be a stabilizing influence near the coast from the marine air layer. Best timing would appear to be in the evening rush, when a couple lines of thunderstorms could affect the area. High temperatures will reach into the low-mid 90s before this under mostly sunny skies.

day1otlk_1300 Screen Shot 2016-07-18 at 10.06.13 AM

Tuesday – with the passage of the the cold front above, there will be a noticeable change in the humidity level for Tuesday. Despite high temperatures reaching into the upper-80s, it will feel considerably more comfortable with the drier air in place.

Wednesday – an area of high pressure behind the cold front will take over for the latter portion of the week. On Wednesday, it will be set up just to our southwest, which will enable cooler winds from the north to bring a brief respite from the heat. High temperatures are only expected to reach into the low-mid 80s.

Screen Shot 2016-07-18 at 10.08.24 AM

Thursday – as the high pressure moves off to the east, winds will turn to the west and southwest, and there will be a corresponding increase in high temperatures into the mid-upper 80s again as warmer air returns.

NYC Weekend Weather – Jul 14, 2016

NYC, Severe Weather, Thunderstorms, Weather Update, Weekend, , , , , ,

It will be a steamy, hot end to the week before the temperatures cool down a little and we get to enjoy a weekend of idyllic summer weather. Some potential for severe thunderstorms exists Thursday. A scattered thunderstorm chance also exists Friday and Saturday night, but the days look dry.

Rest of today – mostly cloudy, hot, humid, with high temperatures in the upper-80s to near 90ºF. A strong to severe thunderstorm is possible this afternoon, particularly in areas north of the city. If we do get clipped by storms in the city, we’ll be on the very southern periphery of the stronger storms, so it doesn’t seem all that likely we’ll see severe weather. Best timing for storms will be in the 3-6PM range.

Screen Shot 2016-07-14 at 10.37.57 AM

Friday – with more sun, Friday is expected to be even hotter than today with highs in the low-mid 90s.

Saturday – even though a cold front will finally pass through Friday, the frontal passage will not bring relief from the heat Friday (the frontal boundary separates two airmasses of disparate dewpoints, and not temperatures). Temperatures will hold in the upper-80s to 90ºF Saturday with mostly sunny skies. It will be an ideal day for heading to the beach as there should be a sea breeze on south-facing shores resulting in 5ºF cooler temperatures.

Sunday – warm, with high temperatures in the mid-upper 80s and partly sunny skies.

NYC Weather Update – Jul 12, 2016

Climate, Drought, NYC, Rain, Thunderstorms, Weather Update, , , , , , , , ,

This week started off with refreshing weather Monday. Temperatures will rise slowly during the course of the week with Friday being the hottest day. The only precipitation chance appears to come on Thursday when a cold front approaches the region.

Rest of today – mostly sunny, seasonably warm, with a high in the low-mid 80s.

Wednesday – temperatures begin slowly warming up as high pressure which has been sitting right over us moves to our east. This will allow a warmer southwesterly flow of air into the region.

asdf

Thursday –  warmer still, possibly with high temperatures hitting 90ºF in some spots. In general, high temperatures will reach into the upper-80s. A chance for showers and thunderstorms will build in the afternoon along with the heat and the approach of a cold front.

Friday – partly cloudy, hot with a high near 90ºF.

Drought Expands Despite Rain

With a dearth of rain continuing, some areas of the northeast (much of Eastern Massachusetts) have been placed under an area of severe drought. For us, a moderate drought persists, despite the fact that we’ve had several rounds of drenching rain over the last couple weeks.

20160705_northeast_trd

NYC Weekend Weather – Jul 7, 2016

Flooding, NYC, Rain, Thunderstorms, Weather Update, Weekend, , , , , , , ,

The end of this week will likely see the first official heat wave of the year, typically defined as 3 or more days with 90ºF+ temperatures. The hot and humid weather comes to a close this weekend as a backdoor cold front brings relief by Sunday. A couple rounds of active weather could crop up this afternoon and again Friday night.

Rest of today – hot, humid, with a high in the low-90s. Periods of clouds and sun with increasing clouds this afternoon. The area is under a flash flood watch due to the impending onset of showers and thunderstorms capable of generating heavy downpours of 1-2″/hour. You can see from the satellite image below that discrete, pulse type storms are already building. Coverage of these storms will increase and they will encounter conditions conducive for strengthening, with plenty of moisture in the atmosphere, no capping to speak of, and lots of sunshine leading to MLCAPE values between 1000-1500 J/Kg. Storms should die down by later this evening. If you’re out and about, carry an umbrella because you may get dumped on.

GOES16252016189O6RcVE

Friday – any relief from the heat from the storms today will unfortunately be short-lived. Temperatures Friday are expected to rise into the low-90s once again under mostly sunny skies. Friday night, as a backdoor cold front the northeast (so-called because it moves from northeast to southwest, the opposite of most cold fronts in the mid-latitudes of the Northern Hemisphere), we could see another round of showers and thunderstorms capable of producing heavy rain across the area.

98fndfd

Saturday – with the backdoor cold front slowly progressing through the area during the day, some potential exists for scattered thunderstorms. Temperatures will be more comfortable in the mid-80s with mostly sunny skies otherwise.

Sunday – mostly sunny with a high in the mid-80s. Best day of the weekend!

NYC Weather Update – Jun 27, 2016

NYC, Rain, Thunderstorms, Weather Update, , , , , , ,

Weather this week and going into the July 4th weekend will be pleasant and dry, with the only real chance for rain during the next several days occurring overnight Tuesday as a cold front pushes through.

Rest of today – temperatures dropping through the day to the mid-70s by the PM rush, humid, with highs already topping out in the low-80s under partly sunny skies. A small chance for widely scattered showers exists later this evening.

Tuesday – mostly cloudy with high temperatures in the lower-80s. Chance of rain and thunderstorms throughout the day, though most likely in the afternoon. Overnight, the cold front associated with this round of precipitation pushes through, and this will serve as better trigger for showers and thunderstorms overnight.

Screen Shot 2016-06-27 at 12.15.26 PM

Wednesday – a small lingering chance for scattered showers and thunderstorms remains during the first half of the day. Otherwise, partly sunny with highs in the low-80s.

Thursday – dry, sunny, high temperatures in the low-80s.

NYC Weekend Weather – Jun 24, 2016

Climate, Drought, NYC, Weather Update, Weekend, , , , , , , ,

The run of sunny, dry weather that we’ve had (with the exception of Thursday this past week) continues into the weekend. With no significant rain anticipated in the next week, drought conditions continue to worsen over the region. Next week, high pressure to the west will drive cooler than normal temperatures, with high temperatures in the low-80s.

Rest of today – sunny with a high in the low-80s.

Saturday – a copy of today, sunny with a high in the low-80s.

Sunday – slightly warmer, but sunny again with highs in the mid-80s. High pressure will be firmly in control.

Screen Shot 2016-06-24 at 11.44.29 AM

Monday – mostly sunny during the day, highs again in the mid-80s, chance for showers and thunderstorms overnight into Tuesday as a cold front passes through.

Cooler than Normal Next Week, Drought Worsens

As the cold front referenced above moves through next Tuesday, it will leave a high pressure center with Canadian origins in control. This setup favors cooler temperatures, and a drier airmass. Hence, the Climate Prediction Center shows that much of the eastern half of the US will should experience below normal temperatures next week.

610temp.new

The continued lack of significant rainfall has led to the expansion of moderate drought which now covers much of northeastern New Jersey, southeastern New York, and all of Long Island.

20160621_NY_trd

NYC Weather Update – Jun 7, 2016

NYC, Rain, Severe Weather, Thunderstorms, Weather Update, , , , , , , ,

After a couple of warm days to start the week, temperatures cool off as a cold front moves through later this evening. A second frontal boundary passes through tomorrow, ushering even cooler, and dry weather for the remainder of the week. Another chance for rain is possible Saturday as a weak Alberta clipper system impacts the area.

Rest of today – mostly sunny with a high in the low-mid 80s. There is a possibility for scattered showers and thunderstorms especially inland later this afternoon between 3-5PM as a cold front approaches from the west. Some of these storms could produce damaging wind gusts and small hail, but these are unlikely to impact the city and coastal areas where the air mass is more stable due to the influence cool ocean waters.

Screen Shot 2016-06-07 at 12.57.05 PM
High Resolution Rapid Refresh model output for today at 3:30PM

Wednesday – with the cold front having passed through, temperatures cool off into the low-70s. The day starts out sunny but clouds will increase ahead of another frontal boundary nears in the afternoon. Ahead of this boundary, a better chance for showers and thunderstorms develops, and once again there could be some widely scattered strong-marginally severe storms.

North American Model High Resolution simulated radar output for Wednesday at 11AM.
North American Model High Resolution simulated radar output for Wednesday at 11AM.

Thursday – temperatures will range in the 50s overnight into Thursday, leading to yet another day of below average, but comfortable temperatures in the low-70s with northwest wind driven by high pressure building to the southwest over the Mississippi Valley. This will pull in a drier, fall-like airmass from Canada.

94fndfd_init_2016060712

Friday – slightly warmer with highs in the low-mid 70s, mostly sunny.

Saturday – there’s a chance for some scattered showers Saturday afternoon into the overnight hours as an Alberta clipper system approaches, otherwise, partly sunny with high temperatures in the mid-70s.

NYC Weekend Weather – Jun 3, 2016

NYC, Severe Weather, Thunderstorms, Weather Update, Weekend, , , , , , , , , , ,

Last weekend featured weather more typical of late-July for the region. This weekend, temperatures will be much cooler, and we may see some heavy rain and possibly even a marginally severe thunderstorm Sunday. Next week, temperatures remain in the below to near-normal range as we feel the impacts of a lingering low pressure over Eastern Canada.

Rest of today – cloudy, with high temperatures in the mid-70s. Areas of rain will continue pushing through the area until around 3PM this afternoon.

Saturday – the nicer of the weekend days, partly sunny with high temperatures in the low-80s. Some chance for scattered showers and thunderstorms especially north and west of the city.

Sunday – a warm front pushes through early, putting us in the warm sector prior to the approach of a cold front associated with a low pressure center over Quebec. This set up could support the development of marginally severe thunderstorms, and the training of multiple storm cells could also lead to some minor flooding. Temperatures will be in the mid-70s. Rain tapers off overnight.

day3otlk_0730
Storm Prediction Center has put portions of the region under a slight chance for severe weather Sunday.

noaad3

Monday – weather calms down again and temperatures go back up to around 80ºF as clouds clear up.

Tuesday – mostly sunny with a high again near 80ºF.

NYC Memorial Day Weekend Weather – May 27, 2016

Climate, Rain, Thunderstorms, Tropical/Hurricanes, Weather Update, Weekend, , , , , , , , , , ,

It’s been a week of hot, summer-like temperatures in the city, and this will continue into the Memorial Day weekend as the official kickoff of the summer season gets underway. It’s going to be an excellent weekend for hitting the beach as a pleasant, cooling sea breeze will be present. Memorial Day itself looks increasingly like a rainy day, with precipitation enhanced by an influx of tropical moisture from what could very shortly become the second named tropical storm (Bonnie) of the 2016 Atlantic Hurricane Season.

Rest of today – warm and humid with high temperatures in the upper-80s to near 90ºF. Cloud cover increases this afternoon, and scattered thunderstorms are possible along a sea breeze front, mostly confined to upper elevations in the Lower Hudson Valley.

Saturday – sunny, hot and humid again with high temperatures around 90ºF – a persistent Bermuda High will be the driver of these hot temperatures.

Screen Shot 2016-05-27 at 12.06.00 PM

Sunday – another very warm day with high temperatures in the mid-upper 80s. A backdoor cold front is expected to near the area, but not push through and this frontal boundary could serve as a trigger for thunderstorms, but these will be limited to areas north of the city.

Monday (Memorial Day) – significantly cooler, mostly cloudy, with periods of rain likely as a cold front approaches slowly from the west. High temperatures in the mid-70s. Rainfall may be enhanced by tropical moisture associated with what will likely become Tropical Storm Bonnie.

Tropical Storm Bonnie

An area of showers associated with a low pressure center off the coast of Florida has been steadily becoming better organized over the last couple days. The National Hurricane Center is giving this disturbance a 90% chance of becoming Tropical Storm Bonnie. Though there won’t be a direct impact on this region, the moisture from this storm could drive heavy rain on Monday.

GOES15152016148dOO7OX
Satellite imagery of the low pressure area that is likely to become TS Bonnie

A Hot Summer Coming?

The Climate Prediction Center continues to call for a hot summer for almost the entirety of the United States in its latest 3 month temperature outlook.

off01_temp

 

 

NYC Weekend Weather – May 14, 2016

Rain, Thunderstorms, Weather Update, Weekend, , , , , , , ,

We have a stretch of decent weather ahead of us going into the early part of next week despite some rain. Rain comes this evening, and is possible Sunday. Windy conditions prevail Monday.

Rest of today – high temperature will be mild in the low-mid 70s with winds from the south. Later this evening, around 6PM, we should see a line of showers with some moderate or strong thunderstorms possible ahead of a cold front passing through. This batch of rain should push through by 9PM.

Screen Shot 2016-05-14 at 1.13.32 PM

Sunday – will be about 10ºF cooler with breezy west winds under mostly sunny skies. Clouds build in the afternoon with a slight chance for rain in the evening.

Monday – breezy west winds continue with a pressure gradient between a low pressure center over eastern Canada and high pressure to the south. Sunny, with high temperatures in the low-60s.

Tuesday – a few degrees warmer with highs in the mid-upper 60s, partly-mostly skies, and less wind.