National Weather Service United States Department of Commerce

Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >

...Wednesday January 26, 2011 Snowfall...

Snowfall Totals


Click on the snowfall map below to access more snowfall data from the event.

snowfall map


Summary

A potent winter storm impacted the Washington and Baltimore metropolitan areas on Wednesday, January 26th. The storm came in two waves: The first wave triggered a period of sleet and snow across northern Maryland in the early morning. A second, stronger wave brought a burst of heavy snow to most of the region late Wednesday afternoon and evening.

High pressure over New England supplied cold air to the Mid-Atlantic late Tuesday night into Wednesday morning. Low pressure developing off the Mid-Atlantic coast early Wednesday brought a light wintry mix to the area. Ground temperatures were warm enough for nothing more than a light slushy accumulation from the Washington D.C area southward. The highest snowfall accumulations in the morning were across northern Maryland where temperatures were cold enough and precipitation was heavy enough to receive 2 to 5 inches of snow, causing a slippery morning commute. Precipitation transitioned to light rain and drizzle across most of the area by the late morning through early afternoon as warmer air from the Atlantic wrapped into the system. A strong upper low over the Tennessee Valley Wednesday morning moved through the area during the late afternoon and evening.

Conditions deteriorated rapidly as heavy precipitation overspread the region at the start of the late afternoon rush hour. Colder air moved into the area during this time, allowing precipitation to change quickly to sleet and then heavy snow. There were many reports of thunder and lightning occurring with the sleet and snow. Heavy snow continued through the evening hours with snowfall rates around 2 to 3 inches per hour during the height of the event.

Snowfall totals from the event were highest across the northern and western suburbs of Washington D.C. (see snowfall map). The heavy snowfall coinciding with the afternoon and evening rush hour commute led to hours and hours of gridlocked traffic from treacherous driving conditions. There were countless reports of commuters needing 5 to 10 hours to get home from work while others abandoned their vehicles. The heavy, wet snow brought down many trees and powerlines. The Washington Post reported almost 400,000 people lost power in the D.C. area that evening.
 


 

Climate Records

Washington D.C. measured 5.0 inches of snowfall on January 26th. The 7.6 inches of snowfall at Baltimore and 7.3 inches at Dulles both set daily climate records for snowfall on January 26th, breaking the previous record of 6.9 inches in 1966 and 6.1 inches in 1987, respectively. All three climate sites recorded precipitation (liquid equivalent) amounts in excess of one inch, breaking previous precipitation records for January 26th.

 


Radar Imagery

The animation below shows a base reflectivity loop of the NWS Doppler Radar (KLWX) from 12:00 pm to 10:00 pm on January 26. The precipitation quickly overspread the area from southwest to northeast during the early to mid afternoon. Numerous observations of thunder and lightning were reported at the onset of the heavy precipitation. The band of heavy snow (dark green and yellow colors) that impacted the Washington DC and Baltimore metro regions during the afternoon and evening rush hour eventually lifted northeast of the area by the late evening.


radar animation map



The pictures below capture the height of the event. The yellow shading depicts a small-scale band of intense snow (2-3+ inches per hour)
located over the northwestern suburbs of Washington D.C. around 6:45 PM (see first image). An hour later, the band of heavy snow progressed east right over Washington D.C. by 7:45 pm
(see second image).

radar image


radar image


  
NOUS41 KLWX 271603
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>506-280403-

PUBLIC INFORMATION STATEMENT
SPOTTER REPORTS
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1103 AM EST THU JAN 27 2011

THE FOLLOWING ARE UNOFFICIAL OBSERVATIONS TAKEN DURING THE PAST
14 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     3.4   908 AM  1/27  CO-OP OBSERVER          

MARYLAND

...ALLEGANY COUNTY...
   1 SSE CUMBERLAND      10.0  1150 PM  1/26                          
   2 NNW FROSTBURG        8.0  1030 AM  1/27  TRAINED SPOTTER         

...ANNE ARUNDEL COUNTY...
   BWI AIRPORT            7.6   700 AM  1/27  AIRPORT                 
   1 WNW GREEN HAVEN      7.5   932 PM  1/26  TRAINED SPOTTER         
   SEVERN                 6.5   913 PM  1/26  SINCE 4...00 PM         
   1 NNE CROFTON          6.5  1000 PM  1/26  TRAINED SPOTTER         
   1 NW ANNAPOLIS         6.5  1000 PM  1/26  TRAINED SPOTTER         
   1 NNW PAROLE           6.3  1235 AM  1/27  TRAINED SPOTTER         
   3 SW LOTHIAN           6.0   740 AM  1/27  TRAINED SPOTTER         
   2 NW RIVA              4.0   915 PM  1/26  TRAINED SPOTTER         
   EASTPORT               3.0   934 PM  1/26  TRAINED SPOTTER         

...BALTIMORE COUNTY...
   1 E OELLA             12.0   803 AM  1/27  TRAINED SPOTTER         
   HUNT VALLEY           11.8   802 AM  1/27  BROADCAST MEDIA         
   ESSEX                 11.0  1141 PM  1/26  PUBLIC                  
   JACKSONVILLE          10.0  1143 PM  1/26  PUBLIC                  
   1 ESE GLYNDON          9.5   905 PM  1/26  TRAINED SPOTTER         
   2 E PERRY HALL         9.5   742 AM  1/27  TRAINED SPOTTER         
   1 NNE ROSEDALE         9.2   752 AM  1/27  TRAINED SPOTTER         
   1 NE ROSSVILLE         8.7   816 AM  1/27  TRAINED SPOTTER         
   PARKVILLE              8.0   942 PM  1/26  TRAINED SPOTTER         
   1 WSW GUNPOWDER        7.5  1023 PM  1/26  TRAINED SPOTTER         

...BALTIMORE CITY...
   2 ESE ARLINGTON        9.3   746 AM  1/27  BROADCAST MEDIA         
   PIMLICO                9.0   900 PM  1/26                          
   1 W PARK HEIGHTS       7.0   801 AM  1/27  TRAINED SPOTTER         

...CALVERT COUNTY...
   2 N HUNTINGTOWN        4.7   745 AM  1/27  NWS EMPLOYEE            
   2 WNW HUNTINGTOWN      4.1   800 AM  1/27  TRAINED SPOTTER         
   2 SW HUNTINGTOWN       3.5   941 PM  1/26  TRAINED SPOTTER         

...CARROLL COUNTY...
   3 WSW LINEBORO        10.0  1130 PM  1/26  TRAINED SPOTTER         
   1 W WESTMINSTER        8.0  1135 PM  1/26  NWS EMPLOYEE            
   WESTMINSTER            8.0  1100 PM  1/26  NWS EMPLOYEE            

...CHARLES COUNTY...
   SAINT CHARLES          6.0  1121 PM  1/26  NWS EMPLOYEE            
   2 ESE BRYANS ROAD      5.9  1136 PM  1/26  TRAINED SPOTTER         
   2 E BRYANS ROAD        5.7  1000 PM  1/26  TRAINED SPOTTER         
   1 SW DENTSVILLE        2.8  1124 PM  1/26  TRAINED SPOTTER         

...FREDERICK COUNTY...
   POINT OF ROCKS        11.2  1150 PM  1/26  NWS EMPLOYEE            
   2 NE JEFFERSON        10.0  1005 PM  1/26  TRAINED SPOTTER         
   NEW MARKET             9.5   747 AM  1/27  TRAINED SPOTTER         
   2 NW NEW MARKET        9.0  1000 PM  1/26  TRAINED SPOTTER         
   2 ENE MYERSVILLE       9.0  1148 PM  1/26  TRAINED SPOTTER         
   WALKERSVILLE           8.0  1112 PM  1/26  PUBLIC                  
   2 N LIBERTYTOWN        8.0   714 AM  1/27  TRAINED SPOTTER         

...HARFORD COUNTY...
   EDGEWOOD              12.0   817 AM  1/27  PUBLIC                  
   1 NNE BEL AIR          9.5  1247 AM  1/27  TRAINED SPOTTER         
   2 E NORRISVILLE        8.0   546 AM  1/27  TRAINED SPOTTER         

...HOWARD COUNTY...
   3 WNW WEST FRIENDSHI  12.0   810 AM  1/27  PRIVATE COMPANY         
   2 SW SAVAGE           10.5  1102 PM  1/26  TRAINED SPOTTER         
   1 SSE SIMPSONVILLE     8.9   749 AM  1/27  TRAINED SPOTTER         
   2 N COLUMBIA           7.8   900 PM  1/26                          
   1 N SAVAGE             7.8  1115 PM  1/26  TRAINED SPOTTER         
   1 WNW ELKRIDGE         7.5  1051 PM  1/26  TRAINED SPOTTER         

...MONTGOMERY COUNTY...
   DAMASCUS              12.1  1003 PM  1/26  TRAINED SPOTTER         
   1 N CLARKSBURG        10.5  1100 PM  1/26  BROADCAST MEDIA         
   2 WSW GAITHERSBURG     9.0  1015 PM  1/26  TRAINED SPOTTER         
   1 W ROCKVILLE          8.2  1116 PM  1/26  TRAINED SPOTTER         
   POOLESVILLE            8.0  1015 PM  1/26  TRAINED SPOTTER         
   1 ENE POTOMAC          7.8  1119 PM  1/26  TRAINED SPOTTER         
   1 ESE NORTH POTOMAC    7.5   951 PM  1/26  TRAINED SPOTTER         
   TAKOMA PARK            5.0  1018 PM  1/26  TRAINED SPOTTER         
   1 N FOUR CORNERS       4.8   951 PM  1/26  TRAINED SPOTTER         

...PRINCE GEORGES COUNTY...
   1 SSE FOREST HEIGHTS   8.0  1150 PM  1/26  CO-OP OBSERVER          
   2 NNW BOWIE            8.0  1105 PM  1/26  TRAINED SPOTTER         
   1 SW OXON HILL         7.6  1107 PM  1/26  NWS EMPLOYEE            
   LAUREL                 7.5   937 PM  1/26  NWS EMPLOYEE            
   1 SSW BELTSVILLE       4.5  1149 PM  1/26  TRAINED SPOTTER         
   1 SW COLLEGE PARK      4.0   804 AM  1/27  TRAINED SPOTTER         
   3 ENE GLENN DALE       3.0   830 AM  1/27  TRAINED SPOTTER         

...ST. MARYS COUNTY...
   RIDGE                  1.5   749 AM  1/27  TRAINED SPOTTER         
   LEXINGTON PARK         0.5  1145 PM  1/26  TRAINED SPOTTER         
   3 ESE PARK HALL        0.5  1153 PM  1/26  TRAINED SPOTTER         

VIRGINIA

...ARLINGTON COUNTY...
   REAGAN NATIONAL AIRP   5.0   700 AM  1/27  AIRPORT                 

...AUGUSTA COUNTY...
   FISHERSVILLE          10.0   728 AM  1/27  PUBLIC                  
   CHURCHVILLE            8.0   727 AM  1/27  PUBLIC                  
   GREENVILLE             7.0   731 AM  1/27  PUBLIC                  
   STUARTS DRAFT          7.0   729 AM  1/27  PUBLIC                  

...CITY OF ALEXANDRIA...
   1 E ALEXANDRIA         4.8   915 PM  1/26  TRAINED SPOTTER         
   1 ESE ALEXANDRIA       3.2  1000 PM  1/26  TRAINED SPOTTER         

...CITY OF HARRISONBURG...
   HARRISONBURG           6.0   821 AM  1/27  PUBLIC                  
   2 S HARRISONBURG       6.0   726 AM  1/27  PUBLIC                  

...CITY OF MANASSAS...
   1 SW MANASSAS PARK     7.0  1023 PM  1/26  TRAINED SPOTTER         
   MANASSAS               6.5  1045 PM  1/26  PUBLIC                  

...CITY OF MANASSAS PARK...
   MANASSAS PARK          7.0   812 AM  1/27  TRAINED SPOTTER         

...CITY OF STAUNTON...
   STAUNTON               8.0   727 AM  1/27  PUBLIC                  

...CITY OF WAYNESBORO...
   WAYNESBORO             7.5   729 AM  1/27  PUBLIC                  

...CITY OF WINCHESTER...
   1 S WINCHESTER         7.0  1130 PM  1/26  TRAINED SPOTTER         
   WINCHESTER             7.0   734 AM  1/27  PUBLIC                  
   1 SE WINCHESTER        7.0  1011 PM  1/26  BROADCAST MEDIA         

...CLARKE COUNTY...
   1 NW BERRYVILLE       10.2  1000 PM  1/26  PUBLIC                  
   1 NNE BOYCE            7.5   904 AM  1/27  TRAINED SPOTTER         

...FAIRFAX COUNTY...
   1 SE CENTREVILLE      10.0   757 AM  1/27  TRAINED SPOTTER         
   1 NNE FAIRFAX STATIO   8.2  1000 PM  1/26  TRAINED SPOTTER         
   VIENNA                 8.0   934 PM  1/26  CO-OP OBSERVER          
   1 W CENTREVILLE        8.0   748 AM  1/27  MESONET                 
   1 ESE CENTREVILLE      8.0   930 PM  1/26  TRAINED SPOTTER         
   2 WSW WEST SPRINGFIE   7.5  1111 PM  1/26  TRAINED SPOTTER         
   1 SSE DUNN LORING      7.0   744 AM  1/27  TRAINED SPOTTER         
   RAVENSWORTH            6.5  1000 PM  1/26  NWS EMPLOYEE            
   WEST SPRINGFIELD       5.0   816 AM  1/27  TRAINED SPOTTER         
   1 SSE FRANCONIA        2.9  1103 PM  1/26  TRAINED SPOTTER         

...FREDERICK COUNTY...
   1 S STEPHENSON        10.1   759 AM  1/27  TRAINED SPOTTER         
   4 S STEPHENSON         9.0   956 PM  1/26  TRAINED SPOTTER         
   1 N WILDE ACRES        8.5   710 AM  1/27  NWS EMPLOYEE            
   MIDDLETOWN             6.0   901 PM  1/26  TRAINED SPOTTER         

...LOUDOUN COUNTY...
   LUCKETTS              12.5  1117 PM  1/26  TRAINED SPOTTER         
   BLUEMONT              12.0   815 AM  1/27  NWS EMPLOYEE            
   2 NNW PURCELLVILLE    10.0  1112 PM  1/26  TRAINED SPOTTER         
   MIDDLEBURG            10.0   730 AM  1/27  PUBLIC                  
   3 SSW ARCOLA           8.5   957 PM  1/26  NWS EMPLOYEE            
   3 WSW ASHBURN          8.3  1215 AM  1/27  NWS EMPLOYEE            
   3 NW DULLES INTERNAT   7.3   700 AM  1/27  NWS OFFICE              
   DULLES INTERNATIONAL   7.3   700 AM  1/27  AIRPORT                 
   ASHBURN                7.0  1125 PM  1/26  NWS EMPLOYEE            
   1 NE ASHBURN           6.2  1024 PM  1/26  NWS EMPLOYEE            

...PAGE COUNTY...
   STANLEY                7.0   823 AM  1/27  PUBLIC                  
   1 ESE HONEYVILLE       6.5  1026 PM  1/26  TRAINED SPOTTER         
   LURAY                  6.5   733 AM  1/27  PUBLIC                  

...PRINCE WILLIAM COUNTY...
   2 SSE GAINESVILLE      8.6  1122 PM  1/26  TRAINED SPOTTER         
   GAINESVILLE            6.8  1045 PM  1/26  PUBLIC                  

...ROCKINGHAM COUNTY...
   BERGTON                9.0   732 AM  1/27  PUBLIC                  
   1 NW LINVILLE          7.0   829 AM  1/27  PUBLIC                  
   4 SE BROADWAY          6.5   740 AM  1/27  PUBLIC                  
   SPARKLING SPRINGS      6.0   734 AM  1/27  PUBLIC                  
   TIMBERVILLE            5.5   732 AM  1/27  PUBLIC                  
   BRIDGEWATER            4.5   734 AM  1/27  PUBLIC                  

...SHENANDOAH COUNTY...
   3 SSE TOMS BROOK       7.8   921 PM  1/26  TRAINED SPOTTER         
   WOODSTOCK              6.0   735 AM  1/27  PUBLIC                  

...STAFFORD COUNTY...
   2 WNW ARKENDALE        3.0   900 PM  1/26  TRAINED SPOTTER         

...WARREN COUNTY...
   2 N LINDEN            11.1  1100 PM  1/26  TRAINED SPOTTER         

WEST VIRGINIA

...BERKELEY COUNTY...
   2 E MARTINSBURG        8.8  1131 PM  1/26  NWS EMPLOYEE            
   2 N FALLING WATERS     8.2   955 PM  1/26  TRAINED SPOTTER         
   1 NNW FALLING WATERS   6.5  1133 PM  1/26  TRAINED SPOTTER         

...HAMPSHIRE COUNTY...
   2 WNW LEHEW            9.1   930 PM  1/26  TRAINED SPOTTER         

...HARDY COUNTY...
   OLD FIELDS             9.5   736 AM  1/27  PUBLIC                  
   MOOREFIELD             9.5   735 AM  1/27  PUBLIC                  

...JEFFERSON COUNTY...
   1 NW SHEPHERDSTOWN    10.0   930 PM  1/26  TRAINED SPOTTER         
   1 SE CHARLES TOWN     10.0  1146 PM  1/26  TRAINED SPOTTER         

...MINERAL COUNTY...
   KEYSER                 8.0   759 AM  1/27  PUBLIC                  

...MORGAN COUNTY...
   2 WNW BERRYVILLE       7.0   933 PM  1/26  TRAINED SPOTTER         

...PENDLETON COUNTY...
   2 NE OAK FLAT          9.0   739 AM  1/27  PUBLIC                  
   6 WSW CHERRY GROVE     8.0   828 AM  1/27  TRAINED SPOTTER         
   FRANKLIN               8.0   731 AM  1/27  PUBLIC                  


**********************24 HOUR SNOWFALL**********************

LOCATION              24 HOUR     TIME/DATE   COMMENTS                   
                     SNOWFALL           OF 
                     /INCHES/   MEASUREMENT

MARYLAND

...ALLEGANY COUNTY...
   1 SE CUMBERLAND        9.0   700 AM  1/27  COCORAHS                

...ANNE ARUNDEL COUNTY...
   2 NNE CROFTON          6.6   530 AM  1/27  COCORAHS                
   3 E LAUREL             6.0   700 AM  1/27  COCORAHS                
   BWI AIRPORT            5.7   700 AM  1/27  AIRPORT                 
   3 SSW SOUTH GATE       5.2   800 AM  1/27  COCORAHS                
   1 SE DEALE             3.5   700 AM  1/27  COCORAHS                
   1 NE HERALD HARBOR     2.0   730 AM  1/27  COCORAHS                

...BALTIMORE COUNTY...
   JACKSONVILLE          13.5  1143 PM  1/26  PUBLIC                  
   1 SE GARRISON         13.4  1200 AM  1/27  TRAINED SPOTTER         
   2 NW LONG GREEN       13.0  1000 PM  1/26  TRAINED SPOTTER         
   1 SW LONG GREEN       12.2   700 AM  1/27  COCORAHS                
   NE REISTERSTOWN       11.5   700 AM  1/27  COCORAHS                
   4 N COCKEYSVILLE      11.5   900 AM  1/27  COCORAHS                
   DUNDALK               10.4  1000 PM  1/26  PUBLIC                  
   2 WNW CATONSVILLE      9.5   700 AM  1/27  COCORAHS                
   1 E KINGSVILLE         9.4   700 AM  1/27  COCORAHS                
   1 NW PERRY HALL        8.0   830 AM  1/27  TRAINED SPOTTER         
   ESSEX                  7.0  1124 PM  1/26  PUBLIC                  
   3 WNW BALDWIN          7.0   800 AM  1/27  COCORAHS                
   2 E PERRY HALL         6.0   743 AM  1/27  TRAINED SPOTTER         
   2 ESE WHITE MARSH      5.5   600 AM  1/27  COCORAHS                

...BALTIMORE CITY...
   PIMLICO               13.0  1100 PM  1/26  TRAINED SPOTTER         

...CALVERT COUNTY...
   1 W PRINCE FREDERICK   3.8   700 AM  1/27  COCORAHS                

...CARROLL COUNTY...
   3 SE WINFIELD         12.7  1149 PM  1/26  TRAINED SPOTTER         
   3 WSW LINEBORO        12.2  1130 PM  1/26  TRAINED SPOTTER         
   2 SE ELDERSBURG       11.0   700 AM  1/27  COCORAHS                
   1 W WESTMINSTER       10.0  1135 PM  1/26  NWS EMPLOYEE            
   WESTMINSTER           10.0  1100 PM  1/26  NWS EMPLOYEE            
   SE MOUNT AIRY          8.0   700 AM  1/27  COCORAHS                
   4 NE TANEYTOWN         8.0   700 AM  1/27  COCORAHS                

...CHARLES COUNTY...
   2 ESE BRYANS ROAD MD   5.9   700 AM  1/27  COCORAHS                
   1 SW BRYANS ROAD       5.0   715 AM  1/27  COCORAHS                
   2 W WALDORF            4.5   440 AM  1/27  COCORAHS                
   4 SSE WALDORF          3.7   500 AM  1/27  COCORAHS                

...FREDERICK COUNTY...
   MYERSVILLE            10.0  1000 PM  1/26  PUBLIC                  
   4 SSW FREDERICK        9.0   600 AM  1/27  COCORAHS                
   7 ENE FREDERICK        5.8   700 AM  1/27  COCORAHS                
   1 SSE THURMONT         4.1   700 AM  1/27  COCORAHS                

...HARFORD COUNTY...
   2 E SCARBORO          15.5  1200 AM  1/27  TRAINED SPOTTER         
   1 NE BEL AIR          13.0  1200 AM  1/27  TRAINED SPOTTER         
   2 E NORRISVILLE       11.5   546 AM  1/27  TRAINED SPOTTER         
   1 N JARRETTSVILLE      6.0   800 AM  1/27  COCORAHS                

...HOWARD COUNTY...
   2 W ELKRIDGE          11.5   700 AM  1/27  COCORAHS                
   1 ESE ELLICOTT CITY   10.5  1113 PM  1/26  TRAINED SPOTTER         
   2 N COLUMBIA          10.1   900 PM  1/26  TRAINED SPOTTER         
   2 WNW ELLICOTT CITY    9.5   800 AM  1/27  COCORAHS                
   ELLICOTT CITY          9.0  1057 PM  1/26  PUBLIC                  

...MONTGOMERY COUNTY...
   DAMASCUS              11.6   905 PM  1/26  TRAINED SPOTTER         
   2 WSW DAMASCUS        10.1   700 AM  1/27  COCORAHS                
   7 N SILVER SPRING      9.3   700 AM  1/27  COCORAHS                
   2 NNE WHEATON-GLENMO   7.0   600 AM  1/27  COCORAHS                
   1 SE NORBECK           6.5   700 AM  1/27  COCORAHS                
   2 W ROCKVILLE          6.2   700 AM  1/27  COCORAHS                

...PRINCE GEORGES COUNTY...
   1 SW OXON HILL         8.0  1107 PM  1/26  NWS EMPLOYEE            
   1 W OXON HILL          7.6   700 AM  1/27  COCORAHS                
   ESE CAMP SPRINGS       7.0   800 AM  1/27  COCORAHS                
   1 E BOWIE              6.4   700 AM  1/27  COCORAHS                
   1 W FORESTVILLE        5.8   700 AM  1/27  COCORAHS                
   2 NNE BOWIE            4.8   800 AM  1/27  COCORAHS                
   7 ESE BRANDYWINE       4.0   700 AM  1/27  COCORAHS                

...ST. MARYS COUNTY...
   1 NE LEONARDTOWN       2.0   600 AM  1/27  COCORAHS                
   1 N RIDGE              1.6   700 AM  1/27  COCORAHS                
   4 E HOLLYWOOD          1.1   700 AM  1/27  COCORAHS                
   SW PARK HALL           0.5   745 AM  1/27  COCORAHS                

...WASHINGTON COUNTY...
   3 ENE WILLIAMSPORT     5.6   637 AM  1/27  COCORAHS                

VIRGINIA

...ARLINGTON COUNTY...
   1 SW BALLSTON          6.8   809 AM  1/27  TRAINED SPOTTER         

...CLARKE COUNTY...
   ESE BERRYVILLE         6.5   600 AM  1/27  COCORAHS                

...FAIRFAX COUNTY...
   7 NW FAIRFAX           9.5   800 AM  1/27  COCORAHS                
   1 W VIENNA             8.9   800 AM  1/27  COCORAHS                
   3 N VIENNA             7.7   700 AM  1/27  COCORAHS                
   2 S MCLEAN             7.5   700 AM  1/27  COCORAHS                
   1 SSE FRANCONIA        2.9   700 AM  1/27  COCORAHS                

...FAUQUIER COUNTY...
   6 NNE REMINGTON        5.0   800 AM  1/27  COCORAHS                

...FREDERICK COUNTY...
   5 NE WINCHESTER        9.1   900 AM  1/27  COCORAHS                
   2 E STEPHENS CITY      8.0   700 AM  1/27  COCORAHS                
   SE MIDDLETOWN          6.0   815 AM  1/27  COCORAHS                

...GREENE COUNTY...
   2 WNW STANARDSVILLE    0.4   600 AM  1/27  COCORAHS                

...LOUDOUN COUNTY...
   3 WSW ROUND HILL      11.5   700 AM  1/27  COCORAHS                
   DULLES INTERNATIONAL   6.9   700 AM  1/27  AIRPORT                 
   3 NW DULLES INTERNAT   6.9   700 AM  1/27  NWS OFFICE              

...ORANGE COUNTY...
   1 NW BARBOURSVILLE     3.0   830 AM  1/27  COCORAHS                

...PRINCE WILLIAM COUNTY...
   2 SSE GAINESVILLE      9.1  1122 PM  1/26  TRAINED SPOTTER         
   1 SSW WOODBRIDGE       2.5   630 AM  1/27  COCORAHS                

...SHENANDOAH COUNTY...
   4 N STRASBURG          7.7   700 AM  1/27  COCORAHS                

...SPOTSYLVANIA COUNTY...
   5 SSW FREDERICKSBURG   2.0   600 AM  1/27  COCORAHS                

...STAFFORD COUNTY...
   2 NNW STAFFORD         2.0   700 AM  1/27  COCORAHS                

WEST VIRGINIA

...BERKELEY COUNTY...
   1 NNW FALLING WATERS   8.0  1133 PM  1/26  TRAINED SPOTTER         
   1 WNW BUNKER HILL      7.5   700 AM  1/27  COCORAHS                
   8 ENE MARTINSBURG      7.5   700 AM  1/27  COCORAHS                
   2 NW FALLING WATERS    7.3   700 AM  1/27  COCORAHS                

...HAMPSHIRE COUNTY...
   2 ESE SPRINGFIELD      9.1   700 AM  1/27  COCORAHS                

...HARDY COUNTY...
   3 NNW MCNEILL         10.0   700 AM  1/27  TRAINED SPOTTER         

...MINERAL COUNTY...
   SHORT GAP              7.8   700 AM  1/27  CO-OP OBSERVER          

...MORGAN COUNTY...
   1 W SMITH CROSSROADS  12.1   600 AM  1/27  TRAINED SPOTTER         

...PENDLETON COUNTY...
   3 NE FORT SEYBERT      9.0   600 AM  1/27  COCORAHS                


***********************SNOW ON GROUND***********************

LOCATION                 SNOW     TIME/DATE   COMMENTS                   
                     ON GROUND           OF 
                     /INCHES/   MEASUREMENT

MARYLAND

...ALLEGANY COUNTY...
   1 SE CUMBERLAND       10.0   700 AM  1/27  COCORAHS                

...ANNE ARUNDEL COUNTY...
   2 NNE CROFTON          6.4   530 AM  1/27  COCORAHS                
   3 E LAUREL             6.0   700 AM  1/27  COCORAHS                
   3 SSW SOUTH GATE       5.2   800 AM  1/27  COCORAHS                
   BWI AIRPORT            5.0   700 AM  1/27  AIRPORT                 
   1 SE DEALE             3.5   700 AM  1/27  COCORAHS                
   EASTPORT               3.3   819 AM  1/27  TRAINED SPOTTER         
   1 NE HERALD HARBOR     2.0   730 AM  1/27  COCORAHS                

...BALTIMORE COUNTY...
   4 N COCKEYSVILLE      14.0   900 AM  1/27  COCORAHS                
   NE REISTERSTOWN       13.0   700 AM  1/27  COCORAHS                
   JACKSONVILLE          12.5  1143 PM  1/26  PUBLIC                  
   2 WNW CATONSVILLE     11.0   700 AM  1/27  COCORAHS                
   3 WNW BALDWIN         11.0   800 AM  1/27  COCORAHS                
   1 SW LONG GREEN       10.4   700 AM  1/27  COCORAHS                
   1 E KINGSVILLE        10.0   700 AM  1/27  COCORAHS                

...CALVERT COUNTY...
   1 W PRINCE FREDERICK   4.0   700 AM  1/27  COCORAHS                

...CARROLL COUNTY...
   SE MOUNT AIRY         10.5   700 AM  1/27  COCORAHS                
   2 SE ELDERSBURG        9.0   700 AM  1/27  COCORAHS                

...CHARLES COUNTY...
   4 SSE WALDORF          3.5   500 AM  1/27  COCORAHS                
   2 ESE BRYANS ROAD MD   0.9   700 AM  1/27  COCORAHS                

...FREDERICK COUNTY...
   7 ENE FREDERICK        7.5   700 AM  1/27  COCORAHS                
   4 SSW FREDERICK        7.0   600 AM  1/27  COCORAHS                
   1 SSE THURMONT         4.0   700 AM  1/27  COCORAHS                

...HARFORD COUNTY...
   1 N JARRETTSVILLE      7.0   800 AM  1/27  COCORAHS                

...HOWARD COUNTY...
   2 WNW ELLICOTT CITY    9.5   800 AM  1/27  COCORAHS                
   2 W ELKRIDGE           9.0   700 AM  1/27  COCORAHS                

...MONTGOMERY COUNTY...
   2 WSW DAMASCUS        11.0   700 AM  1/27  COCORAHS                
   7 N SILVER SPRING     10.0   700 AM  1/27  COCORAHS                
   2 NNE WHEATON-GLENMO   7.0   600 AM  1/27  COCORAHS                
   1 SE NORBECK           7.0   700 AM  1/27  COCORAHS                
   2 W ROCKVILLE          5.5   700 AM  1/27  COCORAHS                

...PRINCE GEORGES COUNTY...
   1 SSE FOREST HEIGHTS   7.3   756 AM  1/27  CO-OP OBSERVER          
   1 W OXON HILL          7.0   700 AM  1/27  COCORAHS                
   ESE CAMP SPRINGS       6.0   800 AM  1/27  COCORAHS                
   1 E BOWIE              5.5   700 AM  1/27  COCORAHS                
   1 W FORESTVILLE        5.5   700 AM  1/27  COCORAHS                
   7 ESE BRANDYWINE       4.0   700 AM  1/27  COCORAHS                

...ST. MARYS COUNTY...
   1 N RIDGE              1.5   700 AM  1/27  COCORAHS                
   4 E HOLLYWOOD          1.0   700 AM  1/27  COCORAHS                
   SW PARK HALL           0.5   745 AM  1/27  COCORAHS                

...WASHINGTON COUNTY...
   3 ENE WILLIAMSPORT     5.5   637 AM  1/27  COCORAHS                

VIRGINIA

...ARLINGTON COUNTY...
   REAGAN NATIONAL AIRP   4.0   700 AM  1/27  AIRPORT                 
   2 E BARCROFT           3.4   500 AM  1/27  TRAINED SPOTTER         

...FAIRFAX COUNTY...
   1 W VIENNA             8.9   800 AM  1/27  COCORAHS                
   1 E OAKTON             8.0   955 AM  1/27  1.15 LIQUID EQUIVALENT  
   3 N VIENNA             8.0   700 AM  1/27  COCORAHS                
   2 S MCLEAN             7.0   700 AM  1/27  COCORAHS                
   1 SSE FRANCONIA        2.5   700 AM  1/27  COCORAHS                

...FAUQUIER COUNTY...
   OPAL                   7.0   829 AM  1/27  1.15 LIQUID EQUIVALENT  
   6 NNE REMINGTON        5.0   800 AM  1/27  COCORAHS                

...FREDERICK COUNTY...
   5 NE WINCHESTER        9.0   900 AM  1/27  COCORAHS                
   2 E STEPHENS CITY      8.9   700 AM  1/27  COCORAHS                
   SE MIDDLETOWN          6.0   815 AM  1/27  COCORAHS                

...GREENE COUNTY...
   2 WNW STANARDSVILLE    0.5   600 AM  1/27  COCORAHS                

...LOUDOUN COUNTY...
   3 WSW ROUND HILL      11.5   700 AM  1/27  COCORAHS                
   1 SSW ARCOLA           9.0  1134 PM  1/26  NWS EMPLOYEE            
   3 NW DULLES INTERNAT   6.0   655 AM  1/27  NWS OFFICE              
   DULLES INTERNATIONAL   6.0   700 AM  1/27  AIRPORT                 

...ORANGE COUNTY...
   1 NW BARBOURSVILLE     3.0   830 AM  1/27  COCORAHS                

...PRINCE WILLIAM COUNTY...
   1 SSW WOODBRIDGE       2.5   630 AM  1/27  COCORAHS                

...SHENANDOAH COUNTY...
   4 N STRASBURG          8.0   700 AM  1/27  COCORAHS                

...SPOTSYLVANIA COUNTY...
   5 SSW FREDERICKSBURG   2.0   600 AM  1/27  COCORAHS                

...STAFFORD COUNTY...
   2 NNW STAFFORD         2.0   700 AM  1/27  COCORAHS                

WEST VIRGINIA

...BERKELEY COUNTY...
   1 WNW BUNKER HILL      8.0   700 AM  1/27  COCORAHS                
   2 E MARTINSBURG        8.0  1131 PM  1/26  NWS EMPLOYEE            
   2 NW FALLING WATERS    8.0   700 AM  1/27  COCORAHS                

...HAMPSHIRE COUNTY...
   2 ESE SPRINGFIELD      9.0   700 AM  1/27  COCORAHS                

...PENDLETON COUNTY...
   3 NE FORT SEYBERT      9.0   600 AM  1/27  COCORAHS                

$$

References

The Washington Post, cited 2011: Washington lurches to its feet after hard-hitting storm.
[ Available online at https://www.washingtonpost.com/wp-dyn/content/article/2011/01/26/AR2011012603960.html ]