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Jan 6/7 "Event" and obs


stormtracker
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URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
436 AM EST Wed Jan 5 2022

VAZ503-WVZ505-051745-
/O.CON.KLWX.WS.A.0002.220106T2000Z-220107T1500Z/
Western Highland-Western Pendleton-
436 AM EST Wed Jan 5 2022

...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations up to 7
  inches possible.

* WHERE...In Virginia, Western Highland County. In West
  Virginia, Western Pendleton County.

* WHEN...From Thursday afternoon through Friday morning.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions may impact travel Thursday night into Friday
  morning. Snow covered and slippery roads are 
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URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
436 AM EST Wed Jan 5 2022

VAZ025-026-029-504-507-508-WVZ506-051745-
/O.CON.KLWX.WS.A.0002.220106T2200Z-220107T1100Z/
Augusta-Rockingham-Page-Eastern Highland-
Northern Virginia Blue Ridge-Central Virginia Blue Ridge-
Eastern Pendleton-
436 AM EST Wed Jan 5 2022

...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH LATE THURSDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations up to 6
  inches possible.

* WHERE...Portions of the central Shenandoah Valley and the Blue
  Ridge Mountains.

* WHEN...From Thursday afternoon through late Thursday night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact evening commute Thursday as well as
  the morning commute Friday. Snow covered and slippery roads
  are possible.
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Good morning AFD from LWX 

SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
Chillier air will filter in behind a cold front Thursday as weak
surface high pressure builds overhead. However, the next system will
be fast on its heels. A potent jetmax and shortwave in the northern
stream of the jet will will dig southeast through the central CONUS
and Midwest Thursday. This will carve out an upper-level trough over
the Midwest by the end of the day. Surface low pressure will develop
well to our south over the southeastern CONUS by the end of the day
as well. The shortwave and jetmax will pass through our area
Thursday night while the surface low strengthens and tracks
northeast through North Carolina Thursday evening and off the North
Carolina coast Thursday night. This signal appears to be like a
Miller B type low.

The track of the shortwave will be far enough to the south to put
our area in the favorable region of the mid and upper-level jet for
precipitation to develop. Also, there may be added lift from the
coastal low, or at least some low-level frontogenetical forcing
around 850mb (which can be seen in some of the guidance). There
should be enough cold and dry air for the main precipitation type to
be snow, and snow is likely to accumulate for most of the CWA.

A Winter Storm Watch has been issued for portions of the Potomac
Highlands, central Shenandoah Valley, and the Blue Ridge Mountains.
As of now, it appears that the best lift associated with this system
will set up over these areas, and that will also combine with higher
SLR`s (especially over the higher elevations) to enhance snowfall
totals. There was consideration for issuing a watch farther
northeast toward central VA/southern MD and the Washington DC metro
areas. However, lower SLR`s combined with the fact that this is a
fast moving system kept confidence below 50 percent for warning
criteria to be met. This will be re-assessed later today. However, 2
to 4 inches are most likely across these areas, and that will impact
travel, especially overnight Thursday. Farther north across northern
MD, eastern WV, and northern VA, accumulating snow is likely across
these areas. However, with the better synoptic lift most likely
setting up to the south, that kept confidence too low for a watch in
those areas at this time.

This system will move out of the area by Friday morning, with just
some upslope snow showers possible along/west of the Allegheny
Front. However, with temperatures below freezing there will
be issues with snow covered surfaces that are untreated. Canadian
high pressure will approach, and the gradient between the high and
the departing low will cause blustery and cold conditions.

The high will build overhead Friday night, and winds will diminish
but it will be cold.
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Go loop the h5. You can see this thing stepping more north with each run. Look at this picture. You can see the inverted v that I mentioned yesterday. Of course this is the NAM. But were it’s trends to continue, this would eventually get to the place where this hops right over us and produce basically nothing.

8C10A738-4706-4748-9FF3-4536AB52FE0C.thumb.png.0ba44ed762eb66a685994762fc3008da.png

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9 minutes ago, Eskimo Joe said:

Folks usually don't stay up for the Euro on a weeknight for a small event. 

Would still be nice to see what it showed…any body have info? Looks like the NAM-Icon-GEM and RGEM were all steady or even improvements from their previous runs. GFS another little step back though 

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