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March 20/21 STORM Obs/Discussion- No Banter


nj2va

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Looks like a deep green band is developing just to the east of the District. It will likely continue to stream up from the south in that position for the next few hours. Locations to the east of DC will pile up impressive totals. Wow that big swirl sure moved east a LOT overnight! 

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1 minute ago, dailylurker said:

3" OTG here and coming down hard. Had nearly an inch between 9:53 and 10:23. I've been averaging 1.5" per hour since about 8:30.

Crofton is right under that Armageddon Band. Hope that you have a good snowblower! You're gonna need it!

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2 minutes ago, DCTeacherman said:

Looks like this will be a Columbia to Baltimore City and points northeast jackpot as that band doesn’t look like it’s gonna budge west.  Good news is we’re accumulating on to the left of it. 

i'm not entirely convinced and i'm honestly starting to think that 12z euro run might have been pretty decent.  that closed low isn't moving northeast, it's sliding just south of us.  that's a really good position for this area.  the coastal low/front could be a little further west, but it also might have caused more boundary layer issues, so pick your poison with that.  i wouldn't be surprised if short term guidance trends a little better for us the next few hours.

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7 minutes ago, supernovasky said:

Best rates of the entire storm right now in Gaithersburg. ABSOLUTELY ripping. I'm at least under 1"/hour rates if not more. Ground truth does not seem to match up well with radar returns at all.

Yes!! It is absolutely beautiful right now. This band is legit here. 

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12 minutes ago, diatae said:

A very unofficial 2.8" here in La Plata, MD; just west of 301. All of this has fallen since 7am this morning. Started as light snow and has been moderate since about 830am. No lull. Still cranking.

Sounds like we are neighbors or live in the same general area. Just measured 3 inches. 

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PNS:

000
NOUS41 KLWX 211442
PNSLWX
DCZ001-MDZ003>007-009>011-013-014-016>018-501-502-VAZ025>031-
036>040-042-050>057-501>504-WVZ050>053-055-501>506-220242-

Public Information Statement
Spotter Reports
National Weather Service Baltimore MD/Washington DC
1042 AM EDT Wed Mar 21 2018

THE FOLLOWING ARE UNOFFICIAL OBSERVATIONS TAKEN DURING THE PAST 6
HOURS FOR THE STORM THAT HAS BEEN AFFECTING OUR REGION. APPRECIATION
IS EXTENDED TO HIGHWAY DEPARTMENTS...COOPERATIVE OBSERVERS...SKYWARN
SPOTTERS AND MEDIA FOR THESE REPORTS. THIS SUMMARY IS ALSO AVAILABLE
ON OUR HOME PAGE AT WEATHER.GOV/BALTIMORE

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

LOCATION          STORM TOTAL     TIME/DATE   COMMENTS
                     SNOWFALL           OF
                     /INCHES/   MEASUREMENT

DISTRICT OF COLUMBIA

...District of Columbia...
   National Arboretum C   0.4   800 AM  3/21  Co-Op Observer

MARYLAND

...Allegany County...
   Frostburg             11.0   918 AM  3/21  Trained Spotter
   Ridgeley 1 NW          9.5   823 AM  3/21  Trained Spotter
   Cumberland 2 COOP      8.2   700 AM  3/21  Co-Op Observer
   Frostburg 2 COOP       8.1   700 AM  3/21  Co-Op Observer

...Anne Arundel County...
   Georgetown 1 ESE       1.2   955 AM  3/21  Trained Spotter
   Ridgeway               1.0   700 AM  3/21  CoCoRaHS
   Crofton 1 SE           0.9   700 AM  3/21  CoCoRaHS
   Chelsea Beach          0.9   800 AM  3/21  CoCoRaHS
   Crofton 1 SSE          0.9   730 AM  3/21  NWS Employee
   Odenton 1 WNW          0.4   757 AM  3/21  Trained Spotter
   Bwi Airport            0.1   700 AM  3/21  Airport
   Fort Meade 1 NNE       0.1   700 AM  3/21  CoCoRaHS

...Baltimore County...
   Bentley Springs 1 E    6.2   605 AM  3/21  Trained Spotter
   Long Green 3 NW        4.5   800 AM  3/21  CoCoRaHS
   Reisterstown           4.0   900 AM  3/21  Local Official
   Glyndon 1 SW           4.0   905 AM  3/21  Trained Spotter
   Brooklandville 2 NNW   3.8   945 AM  3/21  Trained Spotter
   Rosedale 1 SSE         3.5   800 AM  3/21  HADS
   Long Green 2 NW        3.5   959 AM  3/21  Trained Spotter
   Towson                 2.7   830 AM  3/21  CoCoRaHS
   Long Green             2.5   700 AM  3/21  CoCoRaHS
   Kingsville 1 E         1.1   700 AM  3/21  CoCoRaHS
   White Marsh 2 ESE      0.5   700 AM  3/21  CoCoRaHS

...Baltimore City...
   Pikesville 2 ESE       1.6   800 AM  3/21  CoCoRaHS
   Pikesville 2 SE        1.6   800 AM  3/21  CoCoRaHS
   Pikesville 3 SE        1.0   620 AM  3/21  Trained Spotter

...Calvert County...
   Eagle Harbor 3 E       0.2   800 AM  3/21  CoCoRaHS

...Carroll County...
   Taneytown 3 ENE        8.5   700 AM  3/21  CoCoRaHS
   Taneytown 3 NE         7.9   700 AM  3/21  CoCoRaHS
   Westminster 2 SE       7.5   730 AM  3/21  Trained Spotter
   Eldersburg             6.5   900 AM  3/21  Public
   Westminster            5.5   730 AM  3/21  Trained Spotter
   Oakland  NE            4.5  1000 AM  3/21  Trained Spotter
   Gamber                 3.5   800 AM  3/21  CoCoRaHS
   Eldersburg 1 SE        3.3   700 AM  3/21  Trained Spotter
   Sykesville 3 NE        3.3   700 AM  3/21  CoCoRaHS

...Charles County...
   St. Charles 1 SSE      2.0   950 AM  3/21  Trained Spotter
   Waldorf 2 W            1.8  1000 AM  3/21  Trained Spotter
   La Plata               1.5   954 AM  3/21  Trained Spotter
   Saint Charles          0.5   800 AM  3/21  CoCoRaHS
   Hughesville 3 NNE        T   825 AM  3/21  Trained Spotter

...Frederick County...
   Thurmont 3 N          10.0   700 AM  3/21  Trained Spotter
   Frederick 3 NW         9.6   758 AM  3/21  NWS Employee
   Thurmont               8.9   830 AM  3/21  CoCoRaHS
   New Market 2 NNW       6.0   500 AM  3/21  CoCoRaHS
   Emmitsburg 2 Se Coop   5.0   715 AM  3/21  Co-Op Observer
   Buckeystown 2 SW       4.5   700 AM  3/21  CoCoRaHS
   Ballenger Creek 1 NE   1.0   800 AM  3/21  Trained Spotter

...Harford County...
   Norrisville 1 WSW      9.0  1015 AM  3/21  CoCoRaHS
   Norrisville            6.4   700 AM  3/21  CoCoRaHS
   Bel Air 1 W            2.0   700 AM  3/21  CoCoRaHS

...Howard County...
   Columbia               3.5  1000 AM  3/21  NWS Employee
   Savage 1 N             3.0  1030 AM  3/21  Trained Spotter
   Columbia 2 N           2.2   930 AM  3/21  Trained Spotter
   Simpsonville 1 NNW     1.0   700 AM  3/21  CoCoRaHS
   Laurel 1 NNE           0.9   715 AM  3/21  CoCoRaHS
   Elkridge 1 W           0.5   700 AM  3/21  CoCoRaHS

...Montgomery County...
   Damascus               4.0   900 AM  3/21  County Emrg Mgmt
   Leesburg 4 NE          2.4   800 AM  3/21  CoCoRaHS
   Norbeck 1 ESE          2.3   955 AM  3/21  Trained Spotter
   Damascus 3 Ssw Coop    1.9   700 AM  3/21  Co-Op Observer
   Damascus 2 SSE         1.5   630 AM  3/21  CoCoRaHS
   Potomac                1.0   900 AM  3/21  CoCoRaHS
   Clarksburg 2 E         1.0   600 AM  3/21  CoCoRaHS
   Takoma Park            1.0   700 AM  3/21  CoCoRaHS
   Montgomery Village     0.8   700 AM  3/21  CoCoRaHS
   White Oak              0.5   800 AM  3/21  CoCoRaHS
   Colesville 1 W         0.5   700 AM  3/21  CoCoRaHS
   Brookeville 1 S        0.5   710 AM  3/21  CoCoRaHS
   Aspen Hill 1 E         0.4   700 AM  3/21  CoCoRaHS
   Colesville             0.3   544 AM  3/21  CoCoRaHS
   White Oak 1 N          0.1   700 AM  3/21  CoCoRaHS

...Prince Georges County...
   Cheltenham 1 NNE       4.0   952 AM  3/21  Trained Spotter
   Kettering 3 ENE        0.5   700 AM  3/21  CoCoRaHS
   Tantallon 1 W          0.3   700 AM  3/21  CoCoRaHS
   Oxon Hill Coop         0.3   500 AM  3/21  Co-Op Observer
   Baden 2 E              0.2   700 AM  3/21  CoCoRaHS

...St. Marys County...
   Leonardtown            0.1   600 AM  3/21  CoCoRaHS

...Washington County...
   Pecktonville 3 NNW     9.2   745 AM  3/21  NWS Employee
   Hagerstown 1 SW        9.0   913 AM  3/21  Trained Spotter
   Halfway                8.2   600 AM  3/21  CoCoRaHS
   Keedysville            7.4   930 AM  3/21  CoCoRaHS
   Boonsboro 3 NNE        7.0   900 AM  3/21  Trained Spotter
   Hagerstown             6.5   700 AM  3/21  CoCoRaHS
   Sharpsburg 5 S         6.2   700 AM  3/21  Co-Op Observer

VIRGINIA

...Albemarle County...
   Free Union             5.0   800 AM  3/21  Broadcast Media
   Earlysville            5.0   800 AM  3/21  Broadcast Media
   Crozet                 5.0   800 AM  3/21  Broadcast Media
   Crozet 1 W             4.1   920 AM  3/21  CoCoRaHS
   Hollymead 1 NNW        4.0   925 AM  3/21  Trained Spotter
   Charlottesville 2w C   3.5   800 AM  3/21  Co-Op Observer

...Arlington County...
   Barcroft 2 E           1.4   955 AM  3/21  Trained Spotter
   Reagan National Apt    0.3   752 AM  3/21  Airport

...Augusta County...
   Moscow 3 S            10.5   920 AM  3/21  Trained Spotter
   Fishersville  NE       9.8  1000 AM  3/21  Trained Spotter
   Churchville            9.0   600 AM  3/21  Broadcast Media
   Hermitage 4 SW         8.8   800 AM  3/21  Trained Spotter
   Greenville             8.0   800 AM  3/21  Broadcast Media
   Churchville 4 NNW      8.0   953 AM  3/21  Trained Spotter
   Waynesboro             7.0   800 AM  3/21  Broadcast Media
   Waynesboro 2 WSW       6.5   815 AM  3/21  Trained Spotter

...City of Alexandria...
   Alexandria 1 W         1.6  1000 AM  3/21  Trained Spotter

...City of Charlottesville...
   Charlottesville        4.0   600 AM  3/21  Broadcast Media
   Charlottesville 1 SS   4.0   953 AM  3/21  Trained Spotter
   Charlottesville 1 NN   3.9   815 AM  3/21  Trained Spotter
   Charlottesville 2 WS   3.1   630 AM  3/21  Trained Spotter

...City of Fairfax...
   Fairfax                1.5   820 AM  3/21  CoCoRaHS

...City of Fredericksburg...
   Fredericksburg 1 ENE   0.1   733 AM  3/21  CoCoRaHS

...City of Harrisonburg...
   Harrisonburg 2 W       7.0  1030 AM  3/21  Broadcast Media
   Harrisonburg           6.0   811 AM  3/21  Broadcast Media

...City of Manassas...
   Manassas Coop          1.0   744 AM  3/21  UCOOP

...City of Staunton...
   Staunton 1 SSE         9.5   730 AM  3/21  CoCoRaHS
   Staunton               6.0   700 AM  3/21  CoCoRaHS

...Clarke County...
   Berryville 1 NNW       5.1   950 AM  3/21  Trained Spotter

...Culpeper County...
   Rixeyville 6 NNE       2.1   700 AM  3/21  CoCoRaHS
   Rixeyville 2 N         2.0   700 AM  3/21  CoCoRaHS

...Fairfax County...
   Chantilly 2 NNE        3.5  1000 AM  3/21  Trained Spotter
   Oakton 1 ENE           1.7   830 AM  3/21  CoCoRaHS
   Mclean 1 SSW           1.0   700 AM  3/21  CoCoRaHS
   Vienna                 1.0   815 AM  3/21  Co-Op Observer
   Herndon 1 NNE          0.6   735 AM  3/21  Trained Spotter
   Reston 1 N             0.5   700 AM  3/21  CoCoRaHS
   Vienna Coop            0.5   700 AM  3/21  Co-Op Observer
   Rivercrest 1 W         0.5   700 AM  3/21  CoCoRaHS
   Wolf Trap 1 ENE        0.5   800 AM  3/21  CoCoRaHS
   Falls Church 1 NW      0.4   700 AM  3/21  CoCoRaHS
   Mount Vernon 1 ENE     0.4   852 AM  3/21  Trained Spotter
   The I66 And I495 1 E   0.2   700 AM  3/21  CoCoRaHS

...Fauquier County...
   Greenwich 1 W          2.0   921 AM  3/21  Other Federal

...Frederick County...
   Gainesboro 1 W         9.0   800 AM  3/21  CoCoRaHS
   Stephens City 2 E      4.8   930 AM  3/21  Trained Spotter
   Winchester 4 ENE       4.0   917 AM  3/21  Trained Spotter
   Winchester 2 S         2.5   514 AM  3/21  Trained Spotter

...Greene County...
   Stanardsville          6.0   534 AM  3/21  Trained Spotter
   Amicus 3 ESE           5.5  1010 AM  3/21  Trained Spotter

...Highland County...
   Mill Gap Coop          9.0   900 AM  3/21  Co-Op Observer

...Loudoun County...
   Bluemont 1 NE          4.4   830 AM  3/21  CoCoRaHS
   Leesburg 1 NE          3.5   910 AM  3/21  Trained Spotter
   Purcellville           2.3   717 AM  3/21  NWS Employee
   Dulles International   2.2   904 AM  3/21  Airport
   Sterling Rcs Coop      1.4   700 AM  3/21  Co-Op Observer
   Belmont 2 N            1.0   745 AM  3/21  CoCoRaHS
   Middleburg 2 WNW       0.5   730 AM  3/21  Co-Op Observer

...Madison County...
   Haywood                5.2   800 AM  3/21  UCOOP
   Criglersville 1 WNW    4.0   700 AM  3/21  CoCoRaHS
   Etlan                  3.0   800 AM  3/21  Broadcast Media

...Nelson County...
   Wintergreen 4 E        4.0   800 AM  3/21  Nellysford
   Rockfish               3.0   800 AM  3/21  Broadcast Media

...Orange County...
   Barboursville 1 NNW    4.0   800 AM  3/21  CoCoRaHS
   Barboursville          4.0   800 AM  3/21  Broadcast Media
   Thornhill              3.1  1000 AM  3/21  Trained Spotter

...Page County...
   Honeyville 1 ESE       6.0   846 AM  3/21  Trained Spotter
   Ida 1 SW               6.0   830 AM  3/21  Trained Spotter
   Stanley                5.0   630 AM  3/21  Broadcast Media

...Prince William County...
   Independent Hill 3 N   3.7  1000 AM  3/21  Trained Spotter
   Bull Run 3 SW          3.0   900 AM  3/21  Trained Spotter
   Dale City 1 W          2.0   850 AM  3/21  Trained Spotter
   Aden 2 WSW             1.0   700 AM  3/21  CoCoRaHS
   Independent Hill 3 N   0.3   530 AM  3/21  CoCoRaHS

...Rappahannock County...
   Sperryville Coop       1.0   500 AM  3/21  Co-Op Observer

...Rockingham County...
   Dale Enterprise 1 ES   6.3   800 AM  3/21  Trained Spotter
   Massanutten 1 SE       5.1   720 AM  3/21  Trained Spotter
   Dale Enterprise Coop   5.0   700 AM  3/21  Co-Op Observer
   Grottoes 2 ENE         5.0  1026 AM  3/21  Trained Spotter
   Massanutten 1 ESE      4.5   700 AM  3/21  CoCoRaHS

...Shenandoah County...
   Woodstock 2ne Coop     3.0   700 AM  3/21  Co-Op Observer
   Clary 1 NE             2.1   700 AM  3/21  CoCoRaHS

...Spotsylvania County...
   Dunavant 1 S           1.5   745 AM  3/21  Trained Spotter
   Massaponax 2 N         0.2   500 AM  3/21  CoCoRaHS

...Stafford County...
   White Oak 3 SSE        0.9   700 AM  3/21  CoCoRaHS

...Warren County...
   Nineveh 2 NNE          3.0   930 AM  3/21  Trained Spotter

WEST VIRGINIA

...Berkeley County...
   Falling Waters 2 NW   11.0   730 AM  3/21  Trained Spotter
   Martinsburg 2 E        9.9   800 AM  3/21  NWS Employee
   Vanville 1 SSW         8.8   945 AM  3/21  Trained Spotter
   Winebrenners Cross 1   8.5   800 AM  3/21  CoCoRaHS
   Bunker Hill  SE        3.5   930 AM  3/21  Trained Spotter

...Grant County...
   Bayard Coop            3.5   700 AM  3/21  Co-Op Observer

...Hampshire County...
   Romney 1sw Coop        5.5   700 AM  3/21  Co-Op Observer

...Hardy County...
   Wardensville 3 E       5.0   842 AM  3/21  Trained Spotter
   Fisher 2 W             2.4   730 AM  3/21  CoCoRaHS

...Mineral County...
   Keyser 2 SW            7.7   700 AM  3/21  CoCoRaHS
   Keyser 2 Ssw Coop      7.5   700 AM  3/21  Co-Op Observer

...Morgan County...
   Omps 5 W               9.5   635 AM  3/21  Trained Spotter
   Omps                   7.6   754 AM  3/21  Trained Spotter

&&
 

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My rates haven't really changed even when going from bright greens to yellows... right now in more greens and the rates are as good as it has been for past 2 hours. Snowflake size changes a bit but the snow has been falling at a moderate/heavy clip for a while now. Probably still an inch an hour rate easily and the snow is piling up quickly.

Will measure again in a few but pretty sure i'm approaching 3 inches at this point (SE DC)... we've lucked out with the heavier stuff so far.

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