Jump to content
  • Member Statistics

    17,598
    Total Members
    7,904
    Most Online
    PublicWorks143
    Newest Member
    PublicWorks143
    Joined

12/10-11 Disco / Obs - Rain/Snow/Wind Event


nj2va
 Share

Recommended Posts

I was wondering about that too with much smaller amounts nearby, but maybe a lucky heavy burst?  It's just curious though right on the water.  Some good measurements in southern MD though, for example a couple inches in LaPlata (hi diatae!)
Got 1.5 in Germantown which triples last winter's total   MoCo schools delayed so my wife's preschool is closed.  That's a gift since she's dealing with a bad cold and does not get paid on sick days
image.png.5a7c8faf90c92ffd9c4082a150b885ad.png

They got that bay inlet effect snow.


.
  • Haha 2
Link to comment
Share on other sites

I honestly didn't measure here in Burke because by the time I woke up there had already been decent melting and compaction, but our cul-de-sac caved fully and was quite icy at about 7:00. Checked our Ring and you could just make out how our walkway caved at about 3:30 and then eventually melted. I was also shocked that the snow on cars and other surfaces was crusty and not just wet.

I'm confident we had over 1" at the height of it.

Crazy to think that we've bested last winter on December 11 with a post-deluge/post-front event. I guess that says more about last year than it does this year. :lol:

  • Like 7
  • Haha 1
Link to comment
Share on other sites

 

NOUS41 KLWX 111421
PNSLWX
DCZ001-MDZ001-003>006-008-011-013-014-016>018-501>508-VAZ025>031-
036>040-050>057-501>508-WVZ050>053-055-501>506-120221-

Public Information Statement
Spotter Reports
National Weather Service Baltimore MD/Washington DC
921 AM EST Mon Dec 11 2023

The following are preliminary observations taken during the past 6
hours for the storm that has been affecting our region. Appreciation
is extended to cooperative and CoCoRaHS observers, Skywarn spotters
and media for these reports. This summary also is available on our
home page at weather.gov/lwx.

********************STORM TOTAL SNOWFALL********************

LOCATION                TOTAL      TIME/DATE  COMMENTS
                     SNOWFALL       MEASURED
                     (inches)

DISTRICT OF COLUMBIA

...District of Columbia...
  Dalecarlia Reservoir    0.5   800 AM 12/11  Co-Op Observer

MARYLAND

...Allegany County...
  Potomac Park 2 NW       0.8   902 AM 12/11  Dept of Highways
  Frostburg               0.6   856 AM 12/11  Co-Op Observer

...Anne Arundel County...
  Pasadena 1 SE           0.7   700 AM 12/11  CoCoRaHS
  Crownsville 3 SSW       0.5   630 AM 12/11  Trained Spotter
  Laurel 4 E              0.5   700 AM 12/11  CoCoRaHS
  Birdsville  WSW         0.4   800 AM 12/11  CoCoRaHS
  Severn 2 W              0.4   700 AM 12/11  CoCoRaHS
  Bwi Airport               T   700 AM 12/11  Official NWS Obs

...Baltimore County...
  Glyndon 1 WSW           1.5   415 AM 12/11  Trained Spotter
  Long Green 2 NW         1.0   500 AM 12/11  Trained Spotter
  Bentley Springs 1 E     1.0   545 AM 12/11  Trained Spotter
  Catonsville 1 SSE       0.5   715 AM 12/11  Trained Spotter
  Glyndon 1 SW            0.5   824 AM 12/11  Trained Spotter
  Long Green 1 SW         0.4   700 AM 12/11  CoCoRaHS

...Baltimore City...
  Pikesville 3 SE         0.3   608 AM 12/11  Trained Spotter

...Calvert County...
  Prince Frederick 1 W    0.8   800 AM 12/11  CoCoRaHS
  North Beach 2 WNW       0.6   725 AM 12/11  CoCoRaHS
  Drum Point 2 N          0.5   700 AM 12/11  Trained Spotter
  Prince Frederick 1 S    0.5   730 AM 12/11  Trained Spotter
  Dunkirk 3.2NNE          0.3   800 AM 12/11  CoCoRaHS
  Chesapeake Beach 4 S    0.2   800 AM 12/11  CoCoRaHS

...Carroll County...
  Manchester 1 SSW        3.5   600 AM 12/11  Trained Spotter
  Millers                 2.3   416 AM 12/11  Trained Spotter
  Mount Airy  SE          2.0   700 AM 12/11  CoCoRaHS
  Westminster 3 SSW       2.0   700 AM 12/11  CoCoRaHS
  Gamber 1 W              1.6   700 AM 12/11  CoCoRaHS
  Westminster 1 W         1.3   600 AM 12/11  CoCoRaHS
  Watersville 1 N         1.3   423 AM 12/11  Trained Spotter
  Eldersburg 1 SE         1.0   506 AM 12/11  Trained Spotter
  Eldersburg 1 E          1.0   700 AM 12/11  CoCoRaHS
  Marston 2 N             0.5   700 AM 12/11  CoCoRaHS

...Charles County...
  Waldorf 3 S             1.8   800 AM 12/11  CoCoRaHS
  Charlotte Hall 2 NW     1.3   600 AM 12/11  Trained Spotter
  Bryantown 2 NNE         1.1   700 AM 12/11  Trained Spotter
  Bryantown 2 NE          1.1   700 AM 12/11  CoCoRaHS
  La Plata 3 ENE          0.8   643 AM 12/11  Trained Spotter
  Waldorf 8 ESE           0.8   730 AM 12/11  CoCoRaHS
  Indian Head               T   659 AM 12/11  Trained Spotter

...Frederick County...
  Green Valley 1 WNW      0.8   530 AM 12/11  Trained Spotter
  New Market 2 NW         0.1   800 AM 12/11  CoCoRaHS

...Garrett County...
  Oakland                 4.0   412 AM 12/11  Dept of Highways
  Accident 3 NNE          3.5   412 AM 12/11  Dept of Highways
  Grantsville 5 W         3.0   412 AM 12/11  Dept of Highways
  Accident 4 E            2.5   800 AM 12/11  Public
  Mountain Lake Park 1    2.0   452 AM 12/11  Dept of Highways
  Grantsville 4 E         2.0   450 AM 12/11  Dept of Highways
  Barton                  1.0   914 AM 12/11  Public

...Harford County...
  Fallston 3 N            0.9   730 AM 12/11  Trained Spotter
  Norrisville 1 WSW       0.7   650 AM 12/11  CoCoRaHS
  Churchville 1 N         0.1   506 AM 12/11  Trained Spotter

...Howard County...
  Glenwood 1 SSW          1.5   700 AM 12/11  CoCoRaHS
  Sykesville 2 SSE        1.5   700 AM 12/11  CoCoRaHS
  Sykesville 3 SE         1.3   700 AM 12/11  CoCoRaHS
  Elkridge 2 W            0.7   550 AM 12/11  Trained Spotter
  Historic Ellicott Ci    0.7   730 AM 12/11  Trained Spotter
  Columbia 3 SSE          0.6   700 AM 12/11  CoCoRaHS
  Simpsonville 1 SSE      0.6   421 AM 12/11  Trained Spotter
  Laurel 1 NNE            0.5   700 AM 12/11  CoCoRaHS
  Columbia 2 N            0.5   700 AM 12/11  CoCoRaHS
  North Laurel 2 ESE      0.5   700 AM 12/11  CoCoRaHS
  Clarksville 2 N         0.4   545 AM 12/11  Trained Spotter
  Historic Ellicott Ci    0.3   745 AM 12/11  Trained Spotter

...Montgomery County...
  Damascus 3 SSW          2.5   413 AM 12/11  Co-Op Observer
  Montgomery Village 1    1.8   630 AM 12/11  CoCoRaHS
  Montgomery Village 3    1.8   359 AM 12/11  Trained Spotter
  Damascus 1 S            1.8   521 AM 12/11  Trained Spotter
  Germantown 5 NNE        1.7   600 AM 12/11  CoCoRaHS
  Laytonsville 5 NNW      1.6   700 AM 12/11  CoCoRaHS
  Damascus 1 SE           1.6   700 AM 12/11  Trained Spotter
  North Potomac 4 N       1.6   700 AM 12/11  CoCoRaHS
  Germantown              1.5   400 AM 12/11  Public
  Gaithersburg            1.5   415 AM 12/11  NWS Employee
  Gaithersburg 3 NE       1.4   700 AM 12/11  CoCoRaHS
  Gaithersburg 1 SW       1.3   511 AM 12/11  Trained Spotter
  Potomac 1 NNW           1.1   700 AM 12/11  CoCoRaHS
  Aspen Hill 1 SW         1.0   730 AM 12/11  Trained Spotter
  Colesville 2 W          1.0   700 AM 12/11  CoCoRaHS
  Silver Spring 6 NNE     0.8   450 AM 12/11  CoCoRaHS
  Olney 1 ENE             0.8   542 AM 12/11  CoCoRaHS
  Norbeck 1 ESE           0.8   700 AM 12/11  CoCoRaHS
  Takoma Park 1 NNW       0.5   700 AM 12/11  CoCoRaHS
  Rossmoor 1 ESE          0.5   700 AM 12/11  CoCoRaHS
  Colesville 1 SE         0.1   620 AM 12/11  Trained Spotter

...Prince Georges County...
  Beltsville 1 SW         0.5   800 AM 12/11  Co-Op Observer
  Bowie 4 S               0.5   700 AM 12/11  CoCoRaHS
  Fort Washington 1 SS    0.2   700 AM 12/11  CoCoRaHS

...St. Marys County...
  Charlotte Hall 4 ENE    1.0   700 AM 12/11  CoCoRaHS
  Mechanicsville 5 NE     1.0   700 AM 12/11  Co-Op Observer
  Leonardtown 1 NE        1.0   600 AM 12/11  CoCoRaHS
  Ridge 1 N               0.5   700 AM 12/11  CoCoRaHS
  Great Mills 4 S         0.5   700 AM 12/11  CoCoRaHS

...Washington County...
  Sabillasville 2 NNW     3.5   629 AM 12/11  CoCoRaHS
  Pecktonville 3 NNW      0.5   330 AM 12/11  NWS Employee
  Boonsboro 3 NNE         0.4   600 AM 12/11  Trained Spotter
  Hagerstown 1 ENE        0.2   700 AM 12/11  CoCoRaHS
  Hagerstown 4 NNW        0.2   700 AM 12/11  CoCoRaHS
  Williamsport 3 ENE      0.1   600 AM 12/11  CoCoRaHS

VIRGINIA

...Arlington County...
  Barcroft 1 WNW          0.3   640 AM 12/11  Trained Spotter
  Falls Church 1 E        0.2   430 AM 12/11  NWS Employee
  Reagan National Apt     0.1   700 AM 12/11  Official NWS Obs

...Augusta County...
  Fort Defiance 4 SE      2.3   700 AM 12/11  CoCoRaHS

...City of Alexandria...
  Alexandria 1 W          0.1   530 AM 12/11  Trained Spotter
  Alexandria 1 ENE          T   800 AM 12/11  Trained Spotter

...City of Fairfax...
  Fairfax 1 N             0.9   700 AM 12/11  CoCoRaHS

...City of Staunton...
  Staunton Water Plant    2.7   800 AM 12/11  Co-Op Observer
  Staunton 1 WSW          1.1   630 AM 12/11  CoCoRaHS
  Staunton 1 WNW          1.0   700 AM 12/11  CoCoRaHS

...Clarke County...
  Berryville 1 NNW        0.5   800 AM 12/11  CoCoRaHS

...Culpeper County...
  Culpeper 1 W            0.2   700 AM 12/11  Trained Spotter

...Fairfax County...
  Mount Vernon  NW        1.5   700 AM 12/11  CoCoRaHS
  Vienna 3 N              1.4   700 AM 12/11  CoCoRaHS
  Burke 1 S               1.4   902 AM 12/11  Trained Spotter
  Chantilly 2 ENE         1.3   442 AM 12/11  Trained Spotter
  Herndon 3 S             1.2   700 AM 12/11  CoCoRaHS
  Vienna 1 WNW            1.2   425 AM 12/11  Trained Spotter
  Oakton  E               1.0   800 AM 12/11  CoCoRaHS
  Fairfax 3 W             1.0   700 AM 12/11  CoCoRaHS
  Vienna                  1.0   700 AM 12/11  Co-Op Observer
  Herndon 2 ENE           0.9   506 AM 12/11  Trained Spotter
  Herndon 1 NNE           0.9   700 AM 12/11  NWS Employee
  Falls Church 2 W        0.7   700 AM 12/11  CoCoRaHS
  Springfield 2 SW        0.5   700 AM 12/11  CoCoRaHS
  Falls Church 1 NNW      0.5   700 AM 12/11  CoCoRaHS
  Reston 1 SSW            0.2   647 AM 12/11  Trained Spotter
  Alexandria 6 SSW        0.2   700 AM 12/11  CoCoRaHS
  Franconia 1 SSE         0.2   700 AM 12/11  CoCoRaHS

...Fauquier County...
  Broad Run 3 SSW         0.4   700 AM 12/11  CoCoRaHS

...Highland County...
  Monterey 1 SW           2.1   600 AM 12/11  CoCoRaHS
  Mill Gap 1 SW           0.6   600 AM 12/11  Co-Op Observer

...Loudoun County...
  Bloomery 3 ESE          1.5   530 AM 12/11  Trained Spotter
  Round Hill 3 WSW        1.0   525 AM 12/11  CoCoRaHS
  Arcola 3 S              1.0   422 AM 12/11  Trained Spotter
  Dulles International    0.5   700 AM 12/11  Official NWS Obs
  Ashburn  N              0.5   700 AM 12/11  CoCoRaHS
  Dulles International    0.5   414 AM 12/11  NWS Office
  Arcola 1 WNW            0.5   700 AM 12/11  CoCoRaHS
  Ashburn 1 SSW           0.4   820 AM 12/11  Trained Spotter
  Ashburn 1 W             0.3   800 AM 12/11  NWS Employee

...Nelson County...
  Wintergreen 4 WNW       6.5   900 AM 12/11  Broadcast Media

...Page County...
  Panorama 2 WSW          2.0   745 AM 12/11  Trained Spotter
  Honeyville 1 ESE        0.5   523 AM 12/11  Trained Spotter

...Prince William County...
  Manassas 5 SE           1.2   600 AM 12/11  CoCoRaHS
  Independent Hill 3 N    1.2   433 AM 12/11  Trained Spotter
  Manassas 6 SE           1.0   530 AM 12/11  CoCoRaHS
  Dale City 1 W           1.0   700 AM 12/11  Trained Spotter
  Manassas 3 NNW          0.4   700 AM 12/11  CoCoRaHS

...Rockingham County...
  Massanutten 1 WSW       2.2   800 AM 12/11  Public
  Harrisonburg 9 NE       1.1   700 AM 12/11  CoCoRaHS
  Massanutten 1 SE        1.0   700 AM 12/11  CoCoRaHS

...Shenandoah County...
  Basye 1 NNE             2.0   830 AM 12/11  Public

...Spotsylvania County...
  Fredericksburg 5 SSW    1.0   600 AM 12/11  CoCoRaHS
  Spotsylvania 9 NW       0.3   700 AM 12/11  CoCoRaHS

...Stafford County...
  Glendie 1 N             1.3   505 AM 12/11  Trained Spotter
  Ramoth 1 W              1.0   737 AM 12/11  Trained Spotter
  Holly Corner 2 E        0.8   532 AM 12/11  Trained Spotter
  Fredericksburg 8 ESE    0.5   700 AM 12/11  CoCoRaHS

...Warren County...
  Buckton 2 E             0.3   330 AM 12/11  Trained Spotter

WEST VIRGINIA

...Berkeley County...
  Falling Waters 2 NW     0.1   700 AM 12/11  CoCoRaHS

...Grant County...
  Bayard                  2.0   700 AM 12/11  Co-Op Observer

...Hampshire County...
  Lehew 2 WNW             5.0   345 AM 12/11  Trained Spotter

...Jefferson County...
  Harpers Ferry 13 SSW    0.9   718 AM 12/11  CoCoRaHS
  Millville 1 ESE         0.2   512 AM 12/11  Trained Spotter

...Pendleton County...
  Franklin 1 W            1.0   830 AM 12/11  County Emergy Mgmt
  Fort Seybert 3 NE       0.3   600 AM 12/11  CoCoRaHS
 
  • Like 5
  • Thanks 2
Link to comment
Share on other sites

33 minutes ago, BlizzardNole said:

I was wondering about that too with much smaller amounts nearby, but maybe a lucky heavy burst?  It's just curious though right on the water.  Some good measurements in southern MD though, for example a couple inches in LaPlata (hi diatae!)

Got 1.5 in Germantown which triples last winter's total :P  MoCo schools delayed so my wife's preschool is closed.  That's a gift since she's dealing with a bad cold and does not get paid on sick days

image.png.5a7c8faf90c92ffd9c4082a150b885ad.png

*waves* Go Noles!

Link to comment
Share on other sites

44 minutes ago, mattie g said:

I honestly didn't measure here in Burke because by the time I woke up there had already been decent melting and compaction, but our cul-de-sac caved fully and was quite icy at about 7:00. Checked our Ring and you could just make out how our walkway caved at about 3:30 and then eventually melted. I was also shocked that the snow on cars and other surfaces was crusty and not just wet.

I'm confident we had over 1" at the height of it.

Crazy to think that we've bested last winter on December 11 with a post-deluge/post-front event. I guess that says more about last year than it does this year. :lol:

I’m the next town over in Fairfax Station Clifton area and we finished at 1.1 inches. Also a large tree across the road in neighborhood which happens back in the woods. Yes already over last seasons snow total.

  • Like 1
Link to comment
Share on other sites

I usually review statistics on every event, winter and summer.

A lot of discussion Saturday and Sunday concerned the preferred model measure of total accumulation.

What I believed to be the common sense preferred measure because of marginal borderline surface conditions pre and during the event did not measure up very well in review. 

I usually relied on the Positive Snow Depth Change. In review, I found it to be consistently too low for both myself and Psu.  Of course I realize it may have been correct for "skunked" locations.  The 10:1 measure was far more accurate.

24 hours pre-event at 06 Sunday :  Stormy 2.0"  - Total PSDC -  GFS  .3"   ECMWF  1.0" 

                                                         Stormy 2.0"  -  10:1 Ratio  -  GFS 1.7"  ECMWF  2.0" 

24 hours pre-event at 06 Sunday :   Psu     3.8"  -  Total  PSDC  - GFS  .3"  ECMWF  1.4"

                                                         Psu     3.8"   -    10:1 Ratio  - GFS  3.9"  ECMWF  2.9"

Link to comment
Share on other sites

Just now, WxUSAF said:

Ava Marie showed a picture from pre-dawn very near BWI that was clearly measurable. I drove to Elkridge near BWI around 8am and it was a trace there and then. So I think if BWI had measured at 4-6am, they would have recorded something.

IMO, this is part of a larger issue with the national AWOS/ASOS network. There has been extensive discussion in the New England subforum about the FAA's lack of routine maintenance for technology, and funding the observer positions at the airports. Thankfully, Maryland is deploying the mesonet statewide and we are adding snow depth sensors to all of our stations so this problem will be somewhat mitigated locally.

  • Like 1
Link to comment
Share on other sites

51 minutes ago, Jersey Andrew said:

I’m the next town over in Fairfax Station Clifton area and we finished at 1.1 inches. Also a large tree across the road in neighborhood which happens back in the woods. Yes already over last seasons snow total.

Sounds about right. The nearest station that reported is right by South Run Rec Center and they reported 1.4". That also sounds like a good number prior to compaction and melting.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...