snow

The first month of 2018 was replete with cold, warmth, snow, rain, and stretches of dry weather. First came an impressive episode of subfreezing conditions that began in late December and extended into the second week of January. This interval included a storm that brought over 10” of snow and blizzard conditions to coastal counties. Next was a heavy rain event accompanied by much warmer air, then later in the month, several scattered rain and snow episodes interspersed with dry conditions and some 60° warmth. Something for most everyone, I suppose you could say!

The statewide January mean temperature was 29.2°. This is 1.5° below the 1981–2010 mean and ranks as the 55th coldest January of the 124 since 1895. It was the coldest January since 2015. Precipitation (rain and melted snow) across NJ averaged 2.69”, which is 0.71” below average for the month. This was the 39th driest on record and the lowest total since 2010. January snowfall across the state averaged 8.3”, which was 1.1” above average. Northern counties averaged 7.9” (-1.4”), central ones 6.9” (-1.0”), and the south on top with 9.2” (+3.4”). Through January, this snow season has brought an average of 17.0” (+4.1”) to New Jersey, with the north at 16.6” (-0.8”), central 14.7” (+0.3”), and south 17.0” (+4.1”).

On many an afternoon this past February, one had to be reminded that, according to the calendar, we were in the midst of a winter month. While there was a modest snowstorm for central and northern areas on the 9th, there were 11 days, including the day prior to the storm, when temperatures equaled or exceeded 60° at one or more New Jersey locations. The average statewide monthly temperature of 40.1° made February 2017 NJ’s mildest since records commenced in 1895. The average was 6.6° above the 1981–2010 mean and 1.0° above the previous record in 1998. In fact, the 2017 average was only 0.7° lower than the mean for March, and would rank as the 54th mildest (69th coolest) March on record. February precipitation (rain and melted snowfall) averaged 1.70”. This was 1.10” below the 30-year mean and ranks as the 11th driest on record. Only the storm on the 9th delivered more than an inch of rain or melted snow to some observing stations around the state.

While average monthly temperature and precipitation (rain and melted snow) did not vary much from their long term averages, January 2016 certainly had enough of a potpourri of atmospheric conditions to satisfy (or displease) most anyone in the Garden State. Temperatures ranged from 67° to -2°, a storm deposited as much as 2.35" of rain, and a blizzard dumped record-breaking snow in several locations and caused moderate to major flooding, especially in south Jersey coastal communities.

The statewide monthly average temperature of 31.1° was 0.1° below the 1981–2010 normal and ranked as the 66th coldest since 1895. The temperature averaged 16.7° colder than the record-shattering December 2015 warmth. This is not a record for a December to January swing in temperature, nor for several other monthly pairs too, however it ranks among the largest. Precipitation averaged 3.65", which is 0.17" above normal and 44th wettest. Statewide snowfall averaged 20.0". This was 12.1" above normal and ranks as the 7th highest since 1895 and the largest since the record 23.1" total in 2011. The north received 20.4", which is 11.1" above normal and ranks 13th largest for January, 23.1" (+15.3") fell in central NJ, ranking 5th greatest for the month, and the south averaged 18.2" (+12.5") tied for the 4th highest January total.

It will come as no surprise to those reading this report that February 2015 was one of the coldest months on record in the Garden State. The average temperature of 22.0° (11.8° below average) made this month the 3rd coldest February and 6th coldest (tied) of any month since statewide records commenced in 1895. Colder Januaries include 1918 (19.9°), 1977 (20.2°), and 1912 (21.9°), with 1940 equal to this past February.

Statewide, melted snow, ice, freezing rain, and plain rain amounted to 2.34". This was 0.52" below average and ranks as the 32nd driest February. There were five events where snow fell to a depth of 2" or more at one or more locations, however there was no statewide "blockbuster" storm. NJ February snowfall averaged 12.3", which is 4.2" above normal. The northern third of the state averaged 16.3" (+6.2"), central area 12.6" (+3.6"), and southern third 10.1" (+3.5"). The ground remained snow covered throughout the month in northern and central regions, consistently at a depth exceeding 10" in the north and closer to 5" in central areas.

The first month of 2015 was a cold one with above-average precipitation. The form of the precipitation varied quite a bit at any particular location as well as across the state over the course of individual events. The statewide average temperature of 27.7° was 3.5° below normal, making it the 32nd coldest January since records commenced in 1895. Precipitation (rain and melted snow) averaged 4.78", which is 1.30" above normal and ranks as the 20th wettest January. Statewide, snowfall averaged 8.6", which is 1.5" above normal and ranks as the 41st snowiest January of the past 121 years. Storms of various intensities arrived every three days throughout the month, and included an impactful freezing rain and flooding event and two moderate snowstorms during the final two weeks. Several bitter cold episodes were punctuated by strong winds and frigid wind chills.