Ph.D. Student - Earth System Science (UC Irvine), B.Sc. - Atmospheric Sciences (Cornell University)
By: Zachary Labe , 9:21 PM GMT on February 23, 2010
A vigorous northern stream low pressure will develop along the baroclinic zone near the eastern seaboard allowing for bombogenesis. Eventually the cutoff low will retrograde northwest over New England allowing for an anomalously tight pressure gradient. Therefore these ingredients give way towards a threat of a significant blizzard over the Northern Middle Atlantic with the threat lasting for several days. Guidance remains uncertain on the western sharp-cutoff but things should be becoming more clear closer to the event.
Thoughts on February 24-27 Snowstorm...
This is my current rain/snow line...
COMING WHEN PRECIPITATION COMMENCES!!!
1. Tight pressure gradient in accompaniment with close proximity of the low pressure, polar vortex, and high pressure will allow for high winds with gusts over 50mph.
2. Blowing and drifting snow will allow for deteoriating conditions across the entire region starting late Wednesday night.
3. A sharp cutoff courtesy of a northwest flow of dry air will exist over central Pennsylvania and west-central Maryland allowing for a bit of uncertainty in regards to snow totals.
4. Falling temperatures will allow for dangerous windchills below 15F increasing the threat for frostbite and hypothermia.
5. Finally this storm looks to be the most dangerous out of the series of historical east coast storms this winter. Stay tuned for further updates.
Selected City Accumulations for the Northeast...
New York City, NY-
"Subject to Change"
After the storm...
Please post storm reports in this blog from across the Northeast during the winter storm and please post location of observation in each report...
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"Here northeast of Harrisburg 2009-2010 winter statistics"
Current Snow Cover- 0-6in; drifts near 12in
Monthly Total- 52.00in
Seasonal Total- 70.05in
October Total- 0.0in
November Total- Trace
December Total- 16.0in
January Total- 2.1in
February Total- 52.00in
Winter Weather Advisories- 6
Winter Storm Warnings- 3
Ice Storm Warnings- 0
Blizzard Warnings- 0
Freezing Rain Advisories- 2
Winter Storm Watches- 4
Lowest High Temperature- 18.8F
Lowest Low Temperature- 9.3F
Wind Chill Advisories- 0
Wind Chill Warnings- 0
(Winter Storms Stats)
Dec 5 - 1.5in - First accumulating snow of season
Dec 8-9 - 2.5in - Snow changed to plain rain
Dec 13 - .1in - Freezing rain
Dec 19 - 9.0in - Heavy snow, higher amounts to south
Dec 31 - 3.0in - 2.5hr warm air advection event
Dec 31 #2 - .2in - Freezing rain/sleet later in day
Jan 8 - 1.5in - Light snow associated with clipper
Feb 2 - 3.75in - Weak coastal storm
Feb 5-7 - 19.0in - 10th largest snowstorm on record
Feb 9-10 - 20.5in - Blizzard conditions/snow depth up to 36in
Feb 15-16 - 1.25in - Light snow from clipper
Feb 25-26 - 5.25in - Wind blow/drifting cutoff low
Feb 28 - 1.0in - Wet snow
Lower Susquehanna Valley Doppler...
(Courtesy of WGAL)
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