Tornado Confirmed

Mother nature went on a rampage across the central and eastern U.S. Thursday, Friday and Saturday. When the complex storm system arrived in the Mid Atlantic region on Saturday it produced a day of rain and numerous severe thunderstorms. One of those storms generated a tornado in Carroll County. The confirmation message is below.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
806 PM EDT SUN APR 17 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0756 PM     TORNADO          1 SW DEEP RUN           39.68N  77.00W
04/16/2011                   CARROLL            MD   NWS EMPLOYEE

            TORNADO CONFIRMED EF-0. MAX WINDS 80 MPH. MAX WIDTH 200
            YARDS. PATH LENGTH 2 MILES. NUMEROUS TREES UPROOTED AND
            SNAPPED. ONE TREE INTO HOUSE. TWO BARNS PARTIALLY
            UNROOFED.

The following is a listing of rainfall reports around the area.

PUBLIC INFORMATION STATEMENT
SPOTTER REPORTS
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
506 PM EDT SUN APR 17 2011

THE FOLLOWING ARE UNOFFICIAL OBSERVATIONS TAKEN DURING THE PAST
25 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 RAINFALL********************

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

MARYLAND

...BALTIMORE COUNTY...
   1 SW PERRY HALL       1.00   555 PM  4/16  TRAINED SPOTTER

...HOWARD COUNTY...
   2 WSW ELKRIDGE        1.25   512 PM  4/16  TRAINED SPOTTER

**********************24 HOUR RAINFALL**********************

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

MARYLAND

...ALLEGANY COUNTY...
   1 SSE CRESAPTOWN-BEL  1.25   700 AM  4/17  COCORAHS

...ANNE ARUNDEL COUNTY...
   1 SE DEALE 0.9 SE     1.48   700 AM  4/17  COCORAHS
   2 W SEVERN 2.0 W      1.32   700 AM  4/17  COCORAHS
   1 NNW PAROLE          1.25  1000 AM  4/17  TRAINED SPOTTER
   1 SE PASADENA 0.7 SE  1.10   700 AM  4/17  COCORAHS
   2 NNE CROFTON 1.5 NN  0.96   700 AM  4/17  COCORAHS
   1 WSW ODENTON 0.8 WS  0.96   700 AM  4/17  COCORAHS
   3 SSW SOUTH GATE 3.0  0.94   800 AM  4/17  COCORAHS
   3 ESE PASADENA 2.6 E  0.72   800 AM  4/17  COCORAHS

...BALTIMORE COUNTY...
   1 SW JACKSONVILLE 1.  1.79   800 AM  4/17  COCORAHS
   4 N COCKEYSVILLE 3.7  1.74   900 AM  4/17  COCORAHS
   3 WNW BALDWIN 2.7 WN  1.64   800 AM  4/17  COCORAHS
   1 SW LONG GREEN 0.6   1.57   700 AM  4/17  COCORAHS
   1 SW TOWSON 0.8 SW    1.42   830 AM  4/17  COCORAHS
   1 E KINGSVILLE 1.2 E  1.38   700 AM  4/17  COCORAHS
   1 SE GWYNN OAK 1.2 S  1.23   700 AM  4/17  COCORAHS
   NE REISTERSTOWN 0.4   1.20   700 AM  4/17  COCORAHS
   2 WNW CATONSVILLE 1.  1.09   700 AM  4/17  COCORAHS
   2 ESE WHITE MARSH 2.  1.00   600 AM  4/17  COCORAHS
   1 ENE CATONSVILLE 0.  0.97   800 AM  4/17  COCORAHS
   1 NNE ROSEDALE        0.95   800 AM  4/17  TRAINED SPOTTER

...CALVERT COUNTY...
   1 W PRINCE FREDERICK  1.48   700 AM  4/17  COCORAHS
   2 SW CHESAPEAKE BEAC  1.36   700 AM  4/17  COCORAHS
   6 E MARLTON 6.0 E     1.06   700 AM  4/17  COCORAHS

...CARROLL COUNTY...
   4 NE TANEYTOWN 3.7 N  1.77   700 AM  4/17  COCORAHS
   3 NE TANEYTOWN 3.2 N  1.68   700 AM  4/17  COCORAHS
   SE MOUNT AIRY 0.2 SE  1.65   700 AM  4/17  COCORAHS
   2 SE ELDERSBURG 2.0   1.62   730 AM  4/17  COCORAHS
   1 W WESTMINSTER 1.0   1.32   600 AM  4/17  COCORAHS

...CHARLES COUNTY...
   2 E WALDORF 2.2 E     1.12   700 AM  4/17  COCORAHS
   3 WNW LA PLATA 2.6 W  1.04   332 AM  4/17  COCORAHS
   4 SSE WALDORF 3.6 SS  1.00   500 AM  4/17  COCORAHS
   1 SW BRYANS ROAD 1.0  0.70   700 AM  4/17  COCORAHS

...FREDERICK COUNTY...
   1 SSE THURMONT 0.8 S  4.08   700 AM  4/17  COCORAHS
   2 ESE MIDDLETOWN 1.8  1.85   700 AM  4/17  COCORAHS
   3 NW FREDERICK 3.1 N  1.83   700 AM  4/17  COCORAHS
   5 WSW NEW MARKET 4.8  1.30   700 AM  4/17  COCORAHS
   4 SSW FREDERICK 3.5   1.09   600 AM  4/17  COCORAHS

...HARFORD COUNTY...
   SE WHITEFORD 0.3 SE   1.91   800 AM  4/17  COCORAHS
   4 WNW HAVRE DE GRACE  1.71   700 AM  4/17  COCORAHS
   3 WNW FALLSTON 2.6 W  1.65   700 AM  4/17  COCORAHS
   3 NNE KINGSVILLE 2.5  1.54   700 AM  4/17  COCORAHS
   2 W BEL AIR 1.7 W     1.32   700 AM  4/17  COCORAHS

...HOWARD COUNTY...
   3 NW COLUMBIA 2.6 NW  1.43   730 AM  4/17  COCORAHS
   3 SE SYKESVILLE 2.6   1.43   700 AM  4/17  COCORAHS
   2 SSE SYKESVILLE 1.7  1.40   700 AM  4/17  COCORAHS
   2 W COLUMBIA 1.7 W    1.39   700 AM  4/17  COCORAHS
   1 WSW ELLICOTT CITY   1.38   815 AM  4/17  COCORAHS
   2 N COLUMBIA 2.3 N    1.31   700 AM  4/17  COCORAHS
   1 SE MARRIOTTSVILLE   1.30   800 AM  4/17  COCORAHS
   2 WNW ELLICOTT CITY   1.26   700 AM  4/17  COCORAHS
   2 SE WOODBINE 1.6 SE  1.26   700 AM  4/17  COCORAHS
   2 N ELLICOTT CITY 1.  1.18   700 AM  4/17  COCORAHS
   2 W ELKRIDGE 1.8 W    0.90   700 AM  4/17  COCORAHS

...MONTGOMERY COUNTY...
   1 NNW POTOMAC 0.9 NN  1.60   700 AM  4/17  COCORAHS
   2 W ROCKVILLE 1.8 W   1.45   700 AM  4/17  COCORAHS
   5 NNE GERMANTOWN 4.6  1.36   700 AM  4/17  COCORAHS
   1 ESE NORBECK 1.1 ES  1.25   700 AM  4/17  COCORAHS
   2 W COLESVILLE 1.7 W  1.19   700 AM  4/17  COCORAHS
   2 NNE WHEATON-GLENMO  1.17   700 AM  4/17  COCORAHS
   1 ESE ROSSMOOR 1.3 E  1.10   700 AM  4/17  COCORAHS
   1 SE OLNEY 0.6 SE     1.04   700 AM  4/17  COCORAHS
   2 NW WHITE OAK 1.7 N  1.02   700 AM  4/17  COCORAHS
   1 N WHITE OAK 1.2 N   0.99   700 AM  4/17  COCORAHS
   1 NNW TAKOMA PARK 0.  0.87   700 AM  4/17  COCORAHS

...PRINCE GEORGES COUNTY...
   1 E BOWIE 0.5 E       1.07   700 AM  4/17  COCORAHS
   7 ESE BRANDYWINE 6.7  1.02   700 AM  4/17  COCORAHS
   ESE CAMP SPRINGS 0.1  0.87   800 AM  4/17  COCORAHS
   2 SE FOREST HEIGHTS   0.86   700 AM  4/17  COCORAHS
   2 SE SUITLAND 2.1 SE  0.86   800 AM  4/17  COCORAHS
   1 W OXON HILL 1.1 W   0.85   700 AM  4/17  COCORAHS
   2 S LAUREL 2.0 S      0.83   800 AM  4/17  COCORAHS
   2 NNW CAMP SPRINGS 1  0.82   700 AM  4/17  COCORAHS

...ST. MARYS COUNTY...
   2 W CALIFORNIA        1.30   700 AM  4/17  TRAINED SPOTTER
   4 ENE CHARLOTTE HALL  1.22   700 AM  4/17  COCORAHS
   4 E HOLLYWOOD 3.5 E   1.16   700 AM  4/17  COCORAHS
   SW PARK HALL 0.2 SW   1.02   700 AM  4/17  COCORAHS
   SSE TALL TIMBERS 0.3  0.89   800 AM  4/17  COCORAHS
   1 NE LEONARDTOWN 0.6  0.86   600 AM  4/17  COCORAHS
   1 NNW COLTONS POINT   0.85   700 AM  4/17  COCORAHS

...WASHINGTON COUNTY...
   3 NNE SMITHSBURG 3.1  2.66   700 AM  4/17  COCORAHS
   2 ESE WILLIAMSPORT 2  2.31   700 AM  4/17  COCORAHS

PUBLIC INFORMATION STATEMENT
SPOTTER REPORTS
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
236 PM EDT SUN APR 17 2011

THE FOLLOWING ARE UNOFFICIAL OBSERVATIONS TAKEN DURING THE PAST 25 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/PHI
********************STORM TOTAL RAINFALL********************

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

DELAWARE

...KENT COUNTY...
   DOVER AFB             1.31   800 AM  4/17

...NEW CASTLE COUNTY...
   WILMINGTON AIRPORT    1.95   800 AM  4/17
   BLACKBIRD             1.77   900 AM  4/17
   LONGWOOD              1.76   900 AM  4/17
   NEWARK                1.60   700 AM  4/17

...SUSSEX COUNTY...
   REDDEN                1.33   900 AM  4/17
   PRIMEHOOK BEACH       1.31   900 AM  4/17
   GEORGETOWN AIRPORT    0.95   800 AM  4/17
   BETHANY BEACH         0.47   900 AM  4/17
   MILLSBORO             0.46   900 AM  4/17

MARYLAND

...CECIL COUNTY...
   CONOWINGO             2.10   900 AM  4/17
   FAIR HILL             1.50   900 AM  4/17

The following maps outline the severe weather reports for the three day period. Take note of the red dots on the maps. These indicate the location of reported tornadoes. There were 248 reports of tornadoes over the three day period. Many were multiple reports for a single tornado and a final tally of the actual number of  tornadoes should be forthcoming.

John Collins

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