CASILIST : Mid-Atlantic Update 3/12/99 @ 7pm EST

J (j{at}weatherwatchers.org)
Fri, 12 Mar 1999 21:43:47 -0500

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Date: Fri, 12 Mar 1999 21:15:43 EST
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Subject: Mid-Atlantic Update 3/12/99 @ 7pm EST
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Mid-Atlantic Weather Station (Columbia, Maryland)
http://members.aol.com/herb0412/index.html

The probability of significant snow in the mid-Atlantic has increased a bit in
the last 24 hours. However, caution is advised with the upcoming forecast. The
storm track of the low will be critical as to which areas get what types of
precip. At post time, the low is in the southern Gulf states and is expected
to move a bit SE, then east... and then toward the northeast. The center of
the storm should come off the coast somewhere in the vicinity of NC. At that
point, the questions become: Where does it go next (NE or E?) and how far off
the coast will the low's center be located? The I-95 corridor looks like a
good dividing line (isn't this often the case 24-hours in advance ?!) with
more snow to the NW and a mix to the SE of this line. The mountains would
appear to be the best bet for accumulating snows... the coastal regions the
best bet for light accumulations and more rain and wind. The location of the
storm track will also play into the precip intensity and will have a
significant effect on what amounts of snow New England could receive on
Monday.

Because of the Greenland Blocking pattern, the upper low over N New England
has helped to funnel down colder north breezes down to the mid-Atlantic region
with its counterclockwise circulation (with even some light snow to the
north). This should keep the mid-Atlantic chillier than normal into Saturday
and help establish the colder air at all levels of the atmosphere.

One final note-- Regardless of whatever snow may fall, next week looks like it
promises a decent warm-up, melting the snows away by late in the week. Come
back to the website for an update Saturday evening, at which time we may be on
the verge of a *nowcast*. But the Balto-Wash-Philly corridor appear to be in
line for at least some accumulating snow.

Mid-Atlantic Weather Station
http://members.aol.com/herb0412/index.html

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