Top Ten

NJ Warming Knows All Seasons

May 24, 2019 - 2:28pm -- Dave Robinson

Monthly Temperature Departures, Jan 2018-Apr 2019

So often over the past roughly year and a half, I have been writing about statewide monthly temperatures being among the warmest on record. In fact, February, May, August, and September 2018, as well as April 2019, have ranked as 2nd, 4th, 2nd, 3rd, and 4th warmest, respectively, since statewide averages began being generated in 1895. Throughout this century, this has so often been the case that, seemingly, it is almost expected each month. Not necessarily a top 5 ranking, but often in the top 20.

This got me wondering whether I was exaggerating the warmth since 2000. Thus an evaluation of rankings was performed for each month and for the year as a whole. This included generating counts of the warmest top 10 and top 20 warmest months since 1895 that have occurred from January 2000 through April 2019.

A Fitting Finale: December 2018 Recap and Annual Summary, including the Top 10 Events of 2018

January 7, 2019 - 1:58pm -- Dave Robinson

Rainy street

It is appropriate that the weather of last month of 2018 was rather similar to many earlier months in the year. Statewide, precipitation was above average for the 10th month of 2018 and the temperature was above average for the 8th month. This resulted in the year being the wettest on record and the 11th warmest since statewide observations began being calculated in 1895.

December precipitation totaled 5.38”. This is 1.53” above the 1981–2010 average and ranks as the 20th wettest (tied with 2007). Snowfall averaged 1.0”, which is 3.9” below average and the 31st least snowy December since 1895. The only notable snowfall was across a swath of south Jersey on the 5th, leading to a south Jersey monthly average of 1.7”. This is 1.9” below average and ranks as the 55th least snowy December. Northern counties averaged 0.6” for the month, some 6.0” below average and ranking 19th least snowy. Central counties came in without any measurable snowfall. This is 5.5” below average and joins ten other Decembers of the past 124 years without measurable snow, four of which have been this century (2001, 2006, 2011, and 2015).

The average statewide temperature was 37.5°. This is 2.3° above the 1981–2010 average and ranks as the 18th mildest December of the past 124 years (tied with 1972 and 1991).

A Rather Quiet End to the Year: December 2016 Recap and Annual Summary, including the Top 10 Events of 2016

January 4, 2017 - 3:40pm -- Dave Robinson

Snow photo

The atmosphere was in a progressive mode throughout December, which explains why no particular weather feature lingered in NJ or elsewhere across North America for too long. The seemingly day-to-day changes resulted in the statewide mean temperature of 36.4° being just 1.2° above the 1981–2010 normal. This ranks as the 28th mildest December since statewide records commenced in 1895, a far cry from last year’s record mild conditions. Despite there being seven precipitation events, one of which was mainly a carry over from November 30th, the rapid movement of these systems meant that none deposited prodigious totals in NJ. Thus 3.37” fell, which is 0.48” below average. This ranks as the 55th driest December. Monthly statewide snowfall averaged 2.0”. This is 2.1” below the 1981–2010 average and ranks 45th least snowy. The northern seven counties averaged 5.5”, the central six counties averaged 1.8”, and the eight southern counties 0.2”, all below average.

Baked December 2015 and Annual Summary, Including the Top 10 Events of 2015

January 3, 2016 - 8:25pm -- Dave Robinson

Beach fog

New Jersey residents will long remember the last month of 2015 as one where the grass remained green, weeds grew, and a few blossoms were seen on trees and shrubs. In fact, with an average temperature of 47.8°, it was the mildest December on record by a wide margin based on records dating back to 1895. Five of the 6 mildest Decembers have occurred since 2001. The anomaly of +12.2° exceeds the +11.0° value in January 1932 as the largest positive anomaly of any month on record. The 5.6° difference between this December's average and the second mildest in 2006 is by far the largest difference between first and second warmest values of any month. The second largest margin is 2.3° between October 2007 and 1971. With 121 years of records, the difference between one ranking and the next is often a tenth to a few tenths of a degree.

December precipitation averaged 4.91" statewide. This is 1.00" above normal and ranks as 27th wettest on record. Snow and sleet fell on one occasion, with light accumulations reported in the north. The statewide 0.1" snowfall average was 5.4" below normal. While certainly on the light side, this is not too out of the ordinary. Seven Decembers since 1895 have failed to see any snow accumulate, and 12 prior Decembers had a statewide average somewhere between 0.1" to 0.5".

ONJSC's Top 10 NJ Weather and Climate Events of 2015

January 1, 2016 - 4:33pm -- Dave Robinson

Listed below is the Office of the NJ State Climatologist’s ranking of the top 10 weather and climate events of 2015. More about each event can be found in the monthly narratives posted on njclimate.org. You might be tempted to rearrange the rankings, particularly as some of the events down the list may have affected you more than others ranked higher. Or perhaps you best recall one that didn’t make the list. That’s the enjoyment (and frustration!) of lists. While there are a variety of events that made the list, the variable that more often than not took center scene in 2015 was the temperature. Be it warm or cold, the thermometer had stories to tell. Unless stated otherwise, observations are based on an average of several dozen stations. The period of record for monthly and annual departures is 1981–2010; while for extremes and rankings it is from 1895–present.

A Dreary Month, and Shades of Years Past: December and 2014 Annual Summary

January 5, 2015 - 9:58pm -- Dave Robinson

Coastal Flooding from Dec 9 Nor'easter

Clouds prevailed in this darkest month of the year, making for some rather persistent dreary conditions. Until the last week of the month there were only two days (the 4th and 7th) where the sun outperformed the clouds across NJ. At least the year ended on a bright note, with lots of sun during five of the last six days. With the clouds came a fair amount of precipitation, and given milder-than-normal conditions, the vast majority was in the form of rain. Statewide precipitation averaged 4.79". This is 0.88" above the 1981–2010 mean and ranks as the 27th wettest December since 1895. The mean temperature of 38.9° was 3.3° above average and ranked as the 15th warmest on record. Snowfall averaged 0.6", some 3.5" below average and ranked as the 19th least snowy December. A strong nor'easter brought strong winds, multiple inches of rain, minor to moderate coastal flooding, and beach erosion on the 9th.

ONJSC's Top 10 NJ Weather and Climate Events of 2014

January 4, 2015 - 12:00pm -- Dave Robinson

Snow removal at Metlife Stadium

Listed below is the Office of the NJ State Climatologist's ranking of the top 10 weather and climate events of 2014. More about each event can be found in the monthly narratives posted on njclimate.org. You might be tempted to rearrange the rankings, particularly as some of the events may have affected you more than others higher on the list. That's the enjoyment (and frustration!) of lists. This was the second consecutive year that was not too eventful for NJ weather and climate (goodness, we remain stunned by 2011 and 2012). Of course there is still plenty to talk about.

An Active Pattern: December and 2013 Annual Summary

January 1, 2014 - 12:00am -- Dave Robinson

Snowfall totals map from December 8th

The final month of 2013 proved to be a rather volatile one in the weather department. A smorgasbord of conditions included biting cold, record warmth, four snow events, and several soaking rainstorms. The statewide average temperature of 36.2° was 0.6° above normal, making it the 46th mildest December dating back 119 years to 1895. Not only were there major day-to-day fluctuations in temperature, as on several occasions temperatures varied by more than 40° from north to south Jersey. Precipitation in the form of rain and melted snow averaged 4.91" across NJ. This is 1.00" above normal and is the 26th wettest on record. Snowfall averaged 9.2", which is 4.3" above normal and the 31st snowiest December.

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