Monthly Archives: April 2021

NYC Weather Update – Apr 26, 2021

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Late April jumps into June with temperatures soaring into the 80s by midweek before a storm system approaches. This could bring us chances for rain on Thursday, while also cooling temps back to normal levels (mid-60s) by the end of the week.

Rest of today – sunny with breezy northwest winds around 20 mph. High temperatures in the low-60s. Overnight lows in mid-40s with winds diminishing as a low pressure center moves off into the Atlantic, relaxing the pressure gradient.

Weather Prediction Center surface forecast for 8AM Tuesday. A warm front will be approaching from the south. Behind this, much warmer air will be flowing clockwise around the high pressure centered off the Southeast coast of the US.

Tuesday – much warmer with high temperatures near 70ºF with sunny skies. Overnight lows in the mid-50s.

Wednesday – we will be firmly within the warm sector of the next approaching storm, and as a result, we should see temperatures rise well into the low-80s (potentially 15-20ºF above normal). This is in part due to an anomalously warm mid-upper level ridge (see below). Clouds will be on the increase as the next frontal boundary approaches. Overnight lows in the low-60s.

GFS 850 mb temperature anomalies for Wednesday at 2PM. We are forecast to see +8ºC anomalies at this level of the atmosphere, corresponding to much above normal temperatures at the surface.

Thursday – the slow moving cold front will start to impact the region with increasing chances for rain. With clouds and rain, temperatures are expected to drop back to the mid-70s. Overnight lows around 60ºF with rain chances continuining.

NYC Weather Update – Apr 19, 2021

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A week of contrasts is in store, starting with warm, above average temps in the 60s and 70s Monday and Tuesday, then rain coming mid-week, caused by a vigorous cold front. Behind this, temperatures will plummet to below normal in the low-50s by Thursday. There are rain chances Monday afternoon with scattered showers and thunderstorms and more substantial chances Wednesday.

Rest of today – starting off sunny, with highs climbing into the mid-60s. Later in the afternoon, clouds develop with a shortwave moving through the area. This mid-level disturbance could see some scattered showers and thunderstorms. Overnight lows in the upper-40s with clearing skies.

HRRR model simulated radar valid for 6 PM this evening. Some scattered showers and thunderstorms are possible especially inland north and west.

Tuesday – best day of the week with high temperatures rising into the low-70s under sunny skies ahead of the incoming storm Wednesday. Overnight lows in the low-50s.

Wednesday – rain chances increasing during the day into the overnight hours. High temperatures in the low-60s under mostly cloudy skies. Behind the frontal boundary bringing the rain, strong cold air advection kicks in, dropping lows into the upper-30s.

Weather Prediction Center surface forecast for 8AM Wednesday. A low pressure center will be progressing through the region bring through a cold front, showers and scattered thunderstorms.

Thursday – sunny in the morning with more clouds developing in the afternoon. With a cold start, high temperatures only hitting the low-50s. Overnight lows dropping to the low-40s.

NYC Weekend Weather – Apr 16, 2021

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A steady warming trend takes place this weekend on the heels of a late season snow storm for interior New England. Temperatures will go from below normal in the low-50s to about average for this time of the year in the low-60s. High pressure brings us decent conditions but rain chances are not out of the question Sunday and Monday with some mid-level disturbances possibly bringing some showers.

Rest of today – wraparound moisture from a late-season Nor’easter that’s bringing accumulating snow to interior New England could bring some showers later today. Otherwise partly sunny with high temperatures on the cool side in the low-50s with northwesterly winds keeping a cap on temps. Overnight lows in the low-40s as rain chances die down.

Weather Prediction Center surface forecast for 8AM Saturday. Low pressure off of New England will be pulling to the east, but still close enough to give us some clouds.

Saturday – partly sunny with high temperatures in the upper-50s. Overnight lows in the upper-40s. Weak high pressure should keep any rain at bay.

Sunday – mostly cloudy, with high temperatures warming into the low-60s. Slight chance for showers in the afternoon. Overnight lows in the mid-40s.

GFS model 500 mb height and vorticity for Monday at 8AM. A fairly potent area of vorticity (dark purples) associated with a shortwave could bring some showers to the area.

Monday – mostly sunny to start with high temperatures in the mid-60s. Rain chances pick up in the afternoon with diurnally driven showers that could get a boost from some mid-level vorticity. Overnight lows at or slightly below 50ºF.

NYC Weather Update – Apr 12, 2021

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We started April off with an extended period of dry, sunny weather featuring several days with well above average warmth. All that changed over the weekend with rain moving in yesterday. These needed rain chances will punctuate this week, tapering off later towards the weekend. Temperatures during this stretch will generally be below normal in the mid-50s to 60ºF with rain and clouds lingering.

Rest of today – cool, cloudy, with showers at times, high temperatures in the low-50s. Overnight lows in the mid-40s with rain chances continuing. This is all due to a relatively stationary surface trough to our south and west.

Weather Prediction Center surface forecast for 8AM Tuesday. During the day, weak high pressure builds allowing for a dry, sunny day.

Tuesday – sunny with high temperatures in the low-60s as high pressure manages to build in briefly. Overnight lows in the upper-40s.

Wednesday – slightly warmer with high temperatures in the low-60s again but mostly cloudy skies. Slight rain chances during the day. Overnight rain chances continue, with lows dropping to the upper-40s.

ECMWF model 500 mb height, and winds for 8AM Thursday. A closed 500 mb low moving over the Great Lakes brings us the next chance for more sustained rain.

Thursday – another rainy day in store as high temperatures drop back to the mid-50s under mostly cloudy skies. A 500 mb closed low moving over the Great Lakes will supply the instability needed to touch off some showers. Overnight lows dropping to the mid-40s.