Snow event measurement amount cumulative
site (in) (in)
12/5/2009 the first snow event of the season occurred in the afternoon. observers 1.0 1.0
elevation largely determined the snow amounts, with up to ds=0.6; rgg=1.7;
8″ in northwest New Jersey (Sussex) ajb=0.9;snf=0.8;
bs=1.1
12/19/2009 the second snow event of the season was a massive nor’easter. ds =12.4; 12.6 13.6
affecting the area from North Carolina to Massuchesetts. rgg=18.3;
largest amounts included: 25.7″ (Folsom NJ); snf=10.3;
23.3″ Philadelphia (PHL); 27.5″( E Patchogue NY); wfs=11.3;
26.0″ (Baltic CT). Rich Hemler (GFDL, not an observer) had 23″ ajb=10.9
12/31/2009 the first part of a massive system which eventually retrograded GFDL 1.1 14.7
from Nova Scotia to near Boston, and produced ~12″ in
that area, only produced a modest accumulation here.
1/8/2010 an upper air disturbance gave modest accumulation in the GFDL 0.9 15.6
morning. largest amounts were well to our south (Lewes DE 2.6″)
1/28/2010 a storm to our north produced a brief period of snow. larger GFDL 0.2 15.8
amounts (up to 3.0″) were recorded in Hunterdon County.
1/30/2010 Central NJ was on the northern fringe of a storm which ds=0.2;snf=0.1; 0.3 16.1
produced large accumulations to our south (10.0″ in Cape wfs=0.1;rgg=1.0;
May, up to 14″ near Richmond VA) ajb=T
2/3/2010 A small storm produced moderate amounts both north of us GFDL 1.0 17.1
(3″-4″) and south of us (3.5″ in Cape May, 6″ near DC) but little
in central NJ
2/5-6/2010 Two storms, one originating in the Gulf of Mexico and the second ds=msg; snf=7.3; 10.8 27.9
in the midwest, combined to cause massive snowfalls in the mid- ajb=7.1; rgg=17.1;
Atlantic and midwest regions. Some totals: wfs=11.5
12-15″ OH; 21″ metro Pittsburgh; 24-32″ DC area; 22-34″
Baltimore area; 28.5 PHL; T in NYC. IN NJ, largest amount was
28.5″ National Park (near PHL). IN central NJ a sharp gradient
occurred, as shown by the observer reports.
2/9-10/2010 Another combination of a Gulf of Mexico storm and one deriving ds=15.0; snf=15.5; 16.1 44.0
from a disturbance diving southeastward from central Canada ajb=14.1;wfs=16.8;
produced the largest storm of the year (and century). In this rgg=18.9
area there were two periods of heavy wet snow, with rain and
sleet in between. The larger second episode included thunder-
snow and hourly snow totals exceeding 3″. Some totals:
NJ: largest was 18.7″ (Ewing); PA: 27.9″ Adams Co.(Orrtama).
NY: 17.0 (Great Kills, Staten Isl.). City totals: 10.0 (NYC);
15.8 (PHL, week total 44.3″); 22″ York PA (week total 46″);
about 20: BAL (week total ~48″); about 15″ DC (week total
~43″).
2/15-16/2010 A disturbance form the midwest produced a secondary low in VA first stage: 1.5 46.3
which progressed east of NJ. An upper air low passed over NJ ds=1.2;snf=1.3;
later. This resulted in another two-stage storm. The first stage wfs=2.0;ajb=2.3;
was measured by the observers, the second stage at GFDL. rgg=0.5
second stage 0.8
2/22/2010 A coastal disturbance began as snow before turning to rain ajb=0.3;wfs=0,3; 0.2 46.5
rgg=T;snf,ds=msg
2/25-26/2010 A gulf coast storm , energized by an upper air disturbance rgg=7.8;wfs=8.7; 7.7 54.2
from the midwest combined to produce a unique storm ajb=9.4;snf=6.8;
reminiscent of the famous blizzard of 1888 in some places. ds=5.9
some highlights:
rainfall of 5-8″ in Maine (top 8.38″)
area with maximum snowfall extended northwestward from
NYC (20.9″) to the Hudson highlands and Catskills (up to 34″)
in NJ, largest amount was 28″ in West Milford. The central
NJ area escaped the brunt of the storm, but still had
amounts as given by the observers.
2/27-28/2010 Bands of snow deriving from the previous storm produced T 54.2
trace amounts on both days.