June 2017: A Temperature Roller Coaster in NYC

June 2017 felt like a temperature roller coaster in New York City. Highs ranged from an unseasonably cool 58°F to a balmy 94°F. June also brought the city its second heat wave of the year. In the end, however, the cold and warmth balanced each other out. The city’s mean temperature for the month was 72°F, which is only .06°F above average.

 

In terms of precipitation, the city was wetter than normal. Overall, 4.76 inches of rain was measured in Central Park. Of this total, 84% fell during three separate heavy rain events that each produced over an inch of rain. On average, the Big Apple gets 4.41 inches of rain for the entire month of June.

Credit: The Weather Gamut

Powerful Thunderstorm Lashes NYC

A violent thunderstorm lashed the New York City area on Monday afternoon. Strong winds and heavy rain were seen across the region.

After days of hot and humid conditions, a cold front moved in from the west and triggered these powerful storms. According to the NWS, 1.35 inches of rain was measured in Central Park and wind gusts reached 34 mph. Flash floods and downed trees were reported in Manhattan and the Bronx.

Below is a short video of the soaking rain seen near Madison Square Park in Manhattan.

Second Heat Wave of the Year Bakes NYC

The summer solstice is still a week away, but New York City is already sweltering through its second heat wave of the year.

The threshold for what constitutes a heat wave varies by region, but here in the northeast, it is defined as three consecutive days with temperatures reaching 90°F or higher. This week, the mercury in Central Park soared to 90°F on Sunday, 93°F on Monday, and 94°F on Tuesday.

The high temperature on Monday tied the record for the date that was set in 1973. Monday also posted a new record warm low reading – known as a maximum minimum temperature – of 76°F. The previous record of 73°F was set in 2015.

The last time the city saw temperatures reach the mid-90s was August 2016. The average high and low for this time of year in the Big Apple is 79°F and 63°F, respectively.

This dramatic heat was the result of a dominant Bermuda High, a large area of high pressure situated off the east coast. Spinning clockwise, it has been steering hot, humid air from the Gulf of Mexico toward the northeast.

While these conditions can feel oppressive, they can also cause a number of health problems. The New York State Department of Environmental Conservation issued an Air Quality Health Advisory for the city and encouraged people to limit their time outdoors.

If you are not a fan of the heat, fear not. Weather that is more seasonable is expected to return later this week.

The second heat wave of the year is baking the Big Apple. Credit: Melissa Fleming

May 2017: A Month of Weather Extremes in NYC

May was a month of weather extremes is New York City this year. Highs ranged from a cool 53°F to a record warm 92°F. May also produced the city’s first heat wave of the year. However, with 24 out of 31 days posting below average readings, the chill won out in the end. The city’s mean temperature for the month was 61.1°F, which is 1.3°F below average.

In terms of precipitation, May was unusually wet. In all, 6.38 inches of rain were measured in Central Park. Of this impressive total, 3.02 inches (47% of the monthly total) fell in just a few hours on May 5, setting a new rainfall record for the date. Another 1.61 inches came down during an unseasonable nor’easter on May 13. On average, the Big Apple gets 4.19 inches of rain for the entire month of May.

Credit: The Weather Gamut

First Heat Wave of 2017 for NYC

It’s official! We are having a heat wave in New York City.

The threshold for what constitutes a heat wave varies by region, but here in the northeast, it is defined as three consecutive days with temperatures reaching 90°F or higher. In Central Park, the temperature reached 90°F on Wednesday, 92°F on Thursday – setting a new record for the date – and then 91°F on Friday.

While heat waves are more common during the summer months, they have developed in the spring before. The last time one happened in May was May 2-4, 2001. The city’s earliest heat wave on record was April 16-18, 2002. This week’s event ranks as the sixth earliest, according to the NWS.

The main driver of this unseasonable heat is a stubborn Bermuda High, which is a large area of high pressure off the east coast. Spinning clockwise, it is ushering warm and humid air from the Gulf of Mexico into the region

The city’s normal high for this time of year is 72°F.

Credit: NOAA/NWS

Record Breaking Spring Heat in NYC

The calendar says May, but it felt more like July in New York City on Thursday. The temperature in Central Park soared to 92°F, setting a new record high for the date. The previous record of 90°F had been in place since 1936.

Wednesday was also a scorcher, producing the Big Apple’s first 90-degree day of the season. The normal high in NYC at this time of year is 71°F.

These dramatic temperatures are the result of a Bermuda High, a large area of high pressure situated off the mid-Atlantic coast. Spinning clockwise, it has been funneling very warm air from the Gulf of Mexico toward the northeast.

This type of heat can lead to the formation of ground-level ozone, which is why an air quality advisory was issued for the area. Anyone with repository concerns, like asthma, was advised to stay indoors.

While these temperatures are unseasonable, the city has seen 90° readings arrive even earlier. The earliest, according to NWS records, was April 7, 2010, when the mercury climbed to a sweltering 92°F.

If you are not quite ready for summer, fear not. Conditions more typical of May are expected to return this weekend.

Weather Whiplash for NYC. Credit: The Weather Gamut

Unseasonable Nor’easter Soaks NYC

An unseasonable nor’easter soaked the northeastern US this Mother’s Day weekend. Heavy rain and gusty winds were reported across the region.

Here in New York City, 1.61 inches of rain fell in Central Park. This impressive total was only a few one-hundredths on an inch shy of the daily record of 1.66 inches that was set in 1971.

This storm also marked the second consecutive wet weekend for the Big Apple. Last Friday, a record-shattering 3.02 inches of rain came down in just a few hours. Between these two storms, the city has already received more precipitation than it typically sees for the entire month of May.

With an area of low pressure intensifying as it traveled north along the Atlantic coast, this storm was a textbook nor’easter. While this type of storm is more common during the fall and winter months, they can develop any time of the year.

Satellite view of the unseasonable May nor’easter. Credit: NOAA

Weather Gamut Founder Talks about NYC’s Record Rainfall on WUTV

It was a thrill to be asked back to The Weather Channel’s WUTV show on Friday. As a New York City-based contributor to their PWS network, we discussed the record rainfall that swept through the city and the numerous flooding situations it caused.

The show, which dives into the science behind different weather events, airs weeknights from 6 to 8 PM EST on The Weather Channel.

Weather Gamut writer, Melissa Fleming, talks about record rainfall in NYC on WUTV. May 5, 2017. Credit: TWC and Melissa Fleming.

NYC Breaks Rainfall Record that Stood for 146 Years

An intense rainstorm swept through New York City on Friday afternoon. With bands of heavy downpours, it unleashed more than half a month’s worth of rain in just a few hours.

According to the NWS, 3.02 inches of rain was measured in Central Park, setting a new record for the date. The previous record of 1.55 inches had been in place since 1871. On average, the Big Apple gets 4.19 inches of rain for the entire month of May.

The heavy rain disrupted travel across the city, with flash flood warnings issued in all five boroughs. Significant delays and cancellations were also reported at the area’s airports.

This type of heavy rain event, according to NOAA, is expected to become more common in the northeast as global temperatures rise and precipitation patterns change.

Flooding on NYC’s West Side Highway. Credit: New York Patch

April 2017: Second Warmest on Record for NYC

Transitioning to spring, April was a month of wild temperature swings in New York City. We had highs that ranged from a chilly 48°F to a summer-like 87°F. However, with 19 out of 30 days posting above average readings, the warmth won out in the end.

The city’s mean temperature for the month was 57.2°F, which is a whopping 4.2°F above the long-term norm. That makes April 2017 the Big Apple’s second warmest April on record. Only April 2010 was warmer.

In terms of precipitation, April’s famous showers were slightly below normal with 3.84 inches of rain measured in Central Park. But of this total, the vast majority (74%) came down on three different, but very wet, days. The city usually sees 4.50 inches of rain for the month.

Credit: The Weather Gamut