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Forecasted amounts:
Washington DC 6-12"
Philadelphia 9-15"
New York City 12-20"
Boston 12-20"
Harrisburg 14-22"
Allentown 14-22"
Scranton 12-20"
Binghamton 12-18"
Albany 10-18"
Poughkeepsie 14-22"
hartford 12-20"
Actual Amounts (so far):
Washington DC:
Philadelphia (philadelphia county): 4-10"
New York City (new York county): 9-11"
Boston (Suffolk county): 4-5"
Harrisburg (Dauphin County): 8-14"
Allentown (Lehigh County): ~8"
Scranton (Lackawanna county): 5-6"
Binghamton (Broome County): 3-6"
Albany (Eastern Albany County): 8-12"
Poughkeepsie (Dutchess County): 7-13"
hartford (Hartford County): 3-6"
In many locations...snow continues to fall...thus accumulations my not reach the expected totals for some time.
Updated infor for additional accumulatiosn the remainder of the event across new england...
New York City...12-20" - 9-11" already fallen.
hartford...10-17" - 3-6" already fallen.
Boston...12-21" - 4-5" already fallen.
Concord NH...14-22"
Agusta ME...14-24"
Portland ME...14-22"
Bangor ME...14-20"
Berlin VT...10-17"
Houlton ME...12-20"
best large scale forcing...and frontogenesis along and to the northwest of the coastal front will move northeastward into northern new england tonight as surface low pressure progresses up the coast (which by the way has a very interesting eye like feature associated with it...much like the Feb 2001 nor'easter). Strong banding was noted across eastern new york...vermont...NH and ME...where the strengthening frontogenesis is maintaining a symmetrically unstable environment underneath the downstream ridge and to the north of the main vorticity maximum. the band across eastern NY...NYC and western LI will lift NE this evening and into tonight...thus areas across central MA and CT will once again see an increase in snowfall rates and additional accumulations before things finally come to an end on sunday morning in soutner new england and in the late evening or overnight hours across far northeastern areas.
http://www.goes.noaa.gov/ECIR4.html
GFS 18z initial places most of interior new england in the Left front quad of 130-150Kt H3 jet maximum to the east of the closed h3 low extending from N PA into central NY and slightly negative tilted trough across the northeast.
GFS 300 hPa initial:
GFS 500 hPa initial:
thus the best UVM associated with the divergence promoted by the speed maximum should remain across interior new england...and the heaviest QPF should remain confined to these areas as well. this will be enhanced by the strengthening frontogenesis along the coastal front as the thermal gradient tightens.
Notice the sharp contrast in H85 temps along the New england coast:
The GFS shows the best neg omega located just off the coast of mass at 06 hrs...
strong easterly fetch of atlantic moisture in conjunction with 50-60kt H85 LLJ to the north of the H85 low will increase precipitation efficiency across southern new england this evening and overnight.
the heaviest accumulations overnight will occur in bands which develop across interior new england (associated with the left front quad of the upper level jet) and enhanced by the easterly low level jet helping to transport moisture inland.
GFS 24hr Total QPF:
http://www.nco.ncep.noaa.gov/pmb/nwprod ... 4_024s.gif
