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December 11 Frontal Wave Snow Event


WxUSAF
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1 minute ago, psuhoffman said:

Climo beats individual runs of guidance in these situations most of the time. 

Very profound, I like, and it is true. 

A couple of weeks from now and this might have been a different outcome for us.

What a crappy latitude I live at.  

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Getting even a coating after starting out in the 50s and a soaking rain the day before would be an accomplishment around here. Also, an inch on the maps is what falls through the air. Cut that in half for what might stick. Still would be nice to see a period of snow and its early December with another threat possible next week.

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13 minutes ago, psuhoffman said:

Even up here the "average" of all guidance continues to chip away at snow totals.  24 hours ago consensus of CMC/GFS/Euro was for 4-6" up this way.  I'm not saying that was ever believable but that is what they showed.  Now its down to what we kind of always expected 2" in favored spots and less everywhere else.  Climo beats individual runs of guidance in these situations most of the time. 

Euro Kuchera says congrats on your 3”.

 

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For those of you invested in this event, you might want to start looking to western MD...already some mPING reports in Garrett County of SN and the 0.5° CC on Sterling's radar is showing the melting layer creeping closer.  Oakland airport is also down to 34°, which is several degrees lower than forecast.

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Just now, Eskimo Joe said:

For those of you invested in this event, you might want to start looking to western MD...already some mPING reports in Garrett County of SN and the 0.5° CC on Sterling's radar is showing the melting layer creeping closer.  Oakland airport is also down to 34°, which is several degrees lower than forecast.

its snowing in Mississippi -- thats good for us, right?

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3 minutes ago, leesburg 04 said:

WWA here, I'm still clinging to my initial expectation of T - 2" mostly on grass and mulch. I'd love to wake up to snow falling and a somewhat white landscape to get on the board

Same. 1" is my bar, anything more is a bonus. if it ends up being less, oh well. On to next week! 

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URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
228 PM EST Tue Dec 10 2019

MDZ004>006-503-505-507-VAZ505-506-110330-
/O.NEW.KLWX.WW.Y.0031.191211T0700Z-191211T1300Z/
Frederick MD-Carroll-Northern Baltimore-Northwest Montgomery-
Northwest Howard-Northwest Harford-Western Loudoun-
Eastern Loudoun-
228 PM EST Tue Dec 10 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM TO 8 AM EST
WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations 1 to 2 inches are
  expected, with isolated totals of 3 inches possible for
  elevations above 1000 feet.

* WHERE...Portions of north-central Maryland and northern
  Virginia.

* WHEN...From 2 AM to 8 AM EST Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the Wednesday morning commute.

* ADDITIONAL DETAILS...Rain showers are expected to mix with and
  change to snow after midnight. While most accumulations will be
  confined to elevated surfaces, brief and localized heavier
  periods of snow could result in accumulation even on paved
  surfaces.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

When venturing outside, watch your first few steps taken on
steps, sidewalks, and driveways, which could be icy and slippery,
increasing your risk of a fall and injury.

&&
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Updated SWS for the DC metro and i95 weenies

Special Weather Statement
National Weather Service Baltimore MD/Washington DC
201 PM EST Tue Dec 10 2019

DCZ001-MDZ011-013-014-016-504-506-508-VAZ052>055-110100-
District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-Central and Southeast Montgomery-
Central and Southeast Howard-Southeast Harford-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-
Including the cities of Washington, Baltimore, Bowie,
Suitland-Silver Hill, Clinton, College Park, Greenbelt, Laurel,
Camp Springs, Glen Burnie, Annapolis, Severn, South Gate,
Severna Park, Arnold, Odenton, St. Charles, Waldorf, Bethesda,
Rockville, Gaithersburg, Silver Spring, Columbia, Ellicott City,
Aberdeen, Dale City, Manassas, Woodbridge, Lake Ridge, Montclair,
Reston, Herndon, Annandale, Centreville, Chantilly, McLean,
Franconia, Arlington, Alexandria, Falls Church, and Falmouth
201 PM EST Tue Dec 10 2019

...POTENTIAL WINTER COMMUTING HAZARD FOR THE BALTIMORE MD/
WASHINGTON DC METRO AREAS WEDNESDAY MORNING...

There is a potential for hazardous commuting conditions for the
Wednesday morning commute. A period of accumulating snow is
POSSIBLE Wednesday morning across the Baltimore MD/Washington DC
metro areas, with up to an inch of snow accumulation possible on
area roads, with the highest chances north and west of Interstate
95.

If this threat does materialize during the Wednesday morning
rush-hour, many roads could quickly turn slippery and visibility
may be reduced. This could lead to dangerous traveling
conditions, multiple accidents, and extensive delays.

If commuting Wednesday morning, be aware of the POSSIBILITY of
significant travel disruptions. Plan ahead by allowing for extra
travel time, and consider using public transportation and telework
options.

Stay tuned for updates on this potential winter weather episode.


$$

DHOF/CJL
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