Tag Archives: thunderstorms

NYC Weather Update – Jul 18, 2016

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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.

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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.

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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

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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.

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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

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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.

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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.

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NYC Weekend Weather – Jul 7, 2016

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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.

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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.

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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 – Jul 4, 2016

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Rain moves through tonight, and then temperatures warm through the course of the week as a Bermuda high takes control. There’s a chance for showers and thunderstorms Thursday – otherwise this week will certainly feel like summer.

Rest of today (Independence Day) – increasingly cloudy, with a high near 85ºF. Forecasts last week seemed to indicate a rain-free weekend outside of Friday night when we experienced some severe thunderstorms. It now appears that an area of low pressure tracking to our south will bring rain to the area tonight. Currently, the timing of the rain appears to bring it in the city right around the time that the fireworks display is scheduled to kick off. The heaviest rain won’t begin falling until later tonight, so I don’t think this will wash the fireworks out, but it will result in less than ideal viewing conditions if you plan on being outside at the display.

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Tuesday – steady rains should end by the morning rush tomorrow, though a lingering shower could pop up till around noon. Decreasing clouds with high temperatures in the mid-80s.

Wednesday – temperatures heat up into the low-90s, with dewpoints holding steady in the mid-upper 60s, it will feel like August. A Bermuda high will take hold through the end of the week, which could bring our first heat wave of the season.

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Thursday – mostly sunny with a chance of thunderstorms developing late in the day. High temperatures around 90ºF. 

NYC Independence Day Weekend Weather – Jun 30, 2016

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The holiday weekend ahead will be picture perfect for nearly any type of outdoor activity, with the caveat that it will start off with some stormy weather on Friday evening/night. This batch of storms may impact travelers as they make their getaway from the city, but once they pass, the rest of the weekend will be a real gem. Any fireworks displays not scheduled for Friday night should go off without a hitch.

Rest of today – warm with a light breeze from the northwest, less humid, high in the mid-80s with sunny conditions.

Friday – mostly cloudy, high around 80ºF, increasing chance for showers and thunderstorms especially toward the afternoon and evening hours. Some of these storms could produce gusty winds. Storms continue into early overnight hours.

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Saturday – sunny, high in the low-80s.

Sunday – clone of Saturday, high in the low-80s. High pressure begins to dominate the weather over the region.

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Monday (Independence Day) – another sunny, spotless day, with highs in the low-80s.

NYC Weather Update – Jun 27, 2016

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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.

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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 Weather Update – Jun 20, 2016

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We couldn’t have asked for better weather this past weekend, and Sunday in particular was a real gem for all the fathers who had outdoor plans. The run of nice weather gets a couple interruptions this week for some much needed rain, with the first half of the week heating up before a cool down mid-week.

Rest of today – mostly sunny with a high temperature in the low-80s. Today also marks the first official day of summer, which begins at 6:34PM EDT. For the first time in 70 years, the summer solstice will also coincide with a full moon.

Tuesday – a cold front pushes through overnight into Tuesday. There could be some showers/thunderstorms in the early morning hours, but these are unlikely to linger much beyond daybreak. Once the frontal boundary clears, winds pick up inland from the west, ushering in a warmer, though less humid airmass. Temperatures should rise steadily into the upper-80s to near 90ºF in a couple spots under clearing and mostly sunny skies.

Wednesday – pleasant, sunny, with high temperatures in the mid-80s.

Thursday – the next chance at rain comes with a low pressure system moving during the afternoon hours Thursday. Uncertainty remains as to the exact track of this incoming storm system. A southerly track would result in less potential for severe weather/flash flooding, and this is the scenario that forecast models seem to suggest now. Either way, it will be a cooler day with mostly cloudy skies and temperatures in the upper-70s, with a chance for showers and thunderstorms later in the day into the overnight hours.

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Friday – much improved conditions with mostly sunny skies and highs in the low-80s.

Drought Worsens, Likely to Persist this Summer

The continued lack of significant rainfall this Spring has led to increasingly dry soil. The US drought monitor now has some regions of the Northeast in an area of moderate drought. The outlook for the summer suggests that the drought will persist, without much improvement.

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NYC Weekend Weather – Jun 10, 2016

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We’ve had a week of fairly mixed weather, with some days that saw thunderstorms, but a fair mix of sunny and dry conditions also. This weekend, we get another mixed bag, with a possibility of thunderstorms approaching severe limits Saturday, and a great day on Sunday. Looking ahead, high pressure begins to dominate and will ensure dry weather for the coming week.

Rest of today – we’ve hit our high in the mid-upper 70s, and we’ll continue to have sunny weather, and it’ll be a pleasant night with lows in the upper-50s to around 60ºF.

Saturday – the Storm Prediction Center has placed our area under a slight risk of severe weather for Saturday. We could see some thunderstorms rumble through in the afternoon hours as a warm front pushes in from the west, however, they will be weakening as they approach more stable air near the coast, so it’s possible these storms fizzle out before they reach the city. These storms will be moving from northeast to southeast from the interior of Upstate New York. Otherwise, expect partly sunny skies with highs in the upper-70s.

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Sunday – winds pick up behind the passage of the warm front mentioned above. Temperatures also warm up into the low-80s with sunny skies.

Monday – mostly sunny with high temperatures in the upper-70s. High pressure begins to take control over our weather.

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Tuesday – much the same as Monday, pleasant, mostly sunny, with high temperatures in the upper-70s.

NYC Weather Update – Jun 7, 2016

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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.

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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.

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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.