Skip Navigation Linksweather.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service Forecast Office   NWS emblem - Click to go to the NWS homepage
Sterling, VA banner image
navigation bar image  
  navigation bar image

[facebook] [twitter]

April 16, 2011 Severe Weather
000
NOUS41 KLWX 252101
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>506-260915-
DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL-
NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA-
ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON-
ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-
EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-
WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-
WESTERN PENDLETON-EASTERN PENDLETON-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
501 PM EDT MON APR 25 2011

...STORM SURVEY RESULTS FOR APRIL 16 2011...

THIS STATEMENT CONTAINS PRELIMINARY RESULTS OF ANALYSES OF NWS GROUND
SURVEYS...RADAR DATA AND PHOTOGRAPHIC EVIDENCE TO DETERMINE THE
CAUSE OF STORM DAMAGE ASSOCIATED WITH MULTIPLE STORMS THAT
OCCURRED THE AFTERNOON AND EVENING OF SATURDAY APRIL 16 2011.


...EF-1 TORNADO NEAR STUARTS DRAFT IN AUGUSTA COUNTY VA...

LOCATION...2 MI SW STUARTS DRAFT TO 2 MI N STUARTS DRAFT VIRGINIA
DATE...APRIL 16 2011
ESTIMATED START TIME...220 PM EDT
ESTIMATED END TIME...223 PM EDT
MAXIMUM EF-SCALE RATING...EF-1
MAXIMUM WIND SPEED...95 MPH
MAXIMUM PATH WIDTH...200 YARDS
LENGTH...4.1 MILES
BEGINNING LAT/LON...38.0182N / 79.0703W
ENDING LAT/LON...38.0637N / 79.0307W
* FATALITIES...NONE
* INJURIES...NONE
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
  CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN
  NWS STORM DATA.

...SUMMARY...

A GROUND SURVEY CONDUCTED BY THE NATIONAL WEATHER SERVICE
BALTIMORE/WASHINGTON WEATHER FORECAST OFFICE IN STERLING
DETERMINED A TORNADO RATED EF-1 TRACKED JUST WEST OF STUARTS DRAFT
VIRGINIA. PEAK WIND SPEEDS WERE AROUND 95 MPH. THE TORNADO
PRODUCED DAMAGE TO 37 STRUCTURES AND DOWNED NUMEROUS TREES AND
POWERLINES. THE PATTERN OF DAMAGE AND EYEWITNESS ACCOUNTS ALL
CONFIRMED THE OCCURRENCE OF A TORNADO.

INITIAL DAMAGE WAS NOTED IN THE CRANBERRY ESTATES NEIGHBORHOOD JUST 
OFF OFFLITER RD. THE TORNADO TRACKED NORTHEAST FROM THERE AND 
DESTROYED SEVERAL OUTBUILDINGS AND A BARN. NUMEROUS TREES WERE
TOPPLED AND WIRES WERE DOWN ALONG OLD WHITE HILL ROAD. A LARGE
TREE FELL ON A HOUSE OFF WHITE HILL ROAD. A LARGE STORAGE SHED WAS
DESTROYED AND MULTIPLE HARDWOOD TREES WERE TOPPED 10 TO 15 FEET
UP NEAR TWIN MILL AND CHURCHMANS MILL ROADS. A FARM COMPLEX OFF
TINKLING SPRING ROAD ALONG YODER CIRCLE LOST SEVERAL OUTBUILDINGS
AND TREES. THE DAMAGE ENDED NEAR GUTHRIE AND TINKLING SPRING
ROADS.

PRELIMINARY DAMAGE ESTIMATES FROM AUGUSTA COUNTY EMERGENCY OFFICIALS 
LISTED STORM DAMAGE TO 12 RESIDENCES...3 BUSINESSES...15 GARAGES 
SHEDS OR OTHER OUTBUILDINGS...2 MOBILE STRUCTURES AND 5 BARNS. 
PRELIMINARY DAMAGE COST IS ESTIMATED AT OVER 2.2 MILLION DOLLARS.

THE NATIONAL WEATHER SERVICE EXTENDS THANKS TO MEMBERS OF THE LOCAL 
STUARTS DRAFT FIRE DEPARTMENT AND AUGUSTA COUNTY EMERGENCY OFFICIALS
FOR THEIR ASSISTANCE IN CONDUCTING THE GROUND SURVEY.


...EF-0 TORNADO IN NORTHERN CARROLL COUNTY MARYLAND...

LOCATION...1 MI NE UNION MILLS TO 4 MI NE UNION MILLS MD
DATE...APRIL 16 2011
ESTIMATED START TIME...756 PM
ESTIMATED END TIME...759 PM EST
MAXIMUM EF-SCALE RATING...EF-0
ESTIMATED MAXIMUM WIND SPEED...80 MPH
PATH WIDTH...50 TO 250 YARDS
PATH LENGTH...3.1 MILES
BEGINNING LAT/LON...39.6783N / 77.0002W
ENDING LAT/LON...39.7090N / 76.9558W
* FATALITIES...NONE
* INJURIES...NONE
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN NWS 
STORM DATA.

...SUMMARY...

AFTER A REVIEW OF NATIONAL WEATHER SERVICE AND FEDERAL AVIATION
ADMINISTRATION WEATHER RADARS...GROUND OBSERVATIONS AND EYEWITNESS
ACCOUNTS...THE BALTIMORE/WASHINGTON WEATHER FORECAST OFFICE OF THE
NATIONAL WEATHER SERVICE HAS DETERMINED THAT A TORNADO RATED EF-0
ON THE ENHANCED FUJITA SCALE STRUCK NORTHERN CARROLL COUNTY...WITH
ESTIMATED MAXIMUM WIND SPEEDS OF 80 MPH.

THE TORNADO INITIALLY TOUCHED DOWN ALONG DEEP RUN ROAD DOWNING AND
SNAPPING DOZENS OF TREES ALONG THE ROAD AND IN THE RIVER VALLEY
BELOW. MANY WIRES WERE DOWNED FROM FALLING TREES. THE TORNADO
CONTINUED NORTHEAST ALONG GEETING ROAD...DOWNING NUMEROUS TREES...
PARTIALLY UNROOFING A BARN AND FLATTENING A SMALL FARM SHED.
CONTINUING TO FOLLOW THE DEEP RUN RIVER VALLEY...THE TORNADO THEN
HIT THE GRAND VALLEY FARMS SUBDIVISION...DOWNING SEVERAL TREES AND
LARGE BRANCHES. A LARGE TREE FELL ON ONE HOME...RENDERING THE HOME
UNINHABITABLE. ANOTHER HOME HAD ITS DECK AND OUTDOOR SHED DAMAGED
BY LARGE FALLING BRANCHES. THE TORNADO FINALLY LIFTED AFTER
SNAPPING SOME TREES AND PARTIALLY UNROOFING ANOTHER BARN ALONG
BAND HALL HILL ROAD.

THANKS TO CARROLL COUNTY EMERGENCY MANAGEMENT FOR THEIR ASSISTANCE 
WITH THE GROUND SURVEY.


...EF-1 TORNADO IN EASTERN FREDERICK AND WESTERN CARROLL COUNTIES
MD...

LOCATION...2 MI NNE NEW MARKET MD TO 2 MI WNW WINFIELD MD
DATE...APRIL 16 2011 
ESTIMATED START TIME...737 PM EDT 
ESTIMATED END TIME...751 PM EDT
MAXIMUM EF-SCALE RATING...EF-1 
MAXIMUM WIND SPEED...100 MPH 
PATH WIDTH...50-75 YARDS
LENGTH...9.5 MILES 
BEGINNING LAT/LON...39.4050N / 77.2614W 
ENDING LAT/LON...39.4597N / 77.0904W
* FATALITIES...NONE
* INJURIES...NONE
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
  CHANGE PENDING FINAL REVIEW OF THE EVENT/S/ AND PUBLICATION IN
  NWS STORM DATA.

...SUMMARY...

AFTER AN ANALYSIS OF THE RESULTS OF A DAMAGE SURVEY AND REVIEW OF
AVAILABLE RADAR DATA...THE NATIONAL WEATHER SERVICE
BALTIMORE/WASHINGTON WEATHER FORECAST OFFICE HAS DETERMINED THAT A
TORNADO RATED EF-1 STRUCK EASTERN FREDERICK AND WESTERN CARROLL
COUNTIES.

DAMAGE IN FREDERICK COUNTY WAS FOUND IN THREE SWATHS. A SHORT
SWATH OF DAMAGE WAS FOUND ALONG NEW LONDON ROAD AND GREEN VALLEY
ROAD. ALONG NEW LONDON ROAD...A DETACHED GARAGE COLLAPSED...
SHINGLES AND SIDING WERE REMOVED FROM A SINGLE-FAMILY HOME...
SOFTWOOD TREES WERE SNAPPED AND LARGE LIMBS WERE BROKEN FROM
HARDWOOD TREES.

THE TORNADO CONTINUED EAST THROUGH FARMLAND...WHERE NUMEROUS
HARDWOOD TREES WERE UPROOTED OR SNAPPED...AND BARNS AND
OUTBUILDINGS WERE DAMAGED OR DESTROYED. DAMAGE IN THIS SWATH WAS
CONSISTENT WITH MAXIMUM WINDS OF 90 TO 100 MPH AND HAS BEEN RATED
EF-1 ON THE ENHANCED FUJITA SCALE.

A SECOND SWATH WAS FOUND ALONG LIME PLANT ROAD. IN THIS VICINITY... 
SUBSTANTIAL DAMAGE WAS FOUND TO AN EQUESTRIAN FACILITY...WHERE METAL 
PANELS WERE REMOVED FROM A BARN ROOF...FENCING WAS DESTROYED...A 
SHED WAS DESTROYED AND REMOVED FROM THE PROPERTY...TREES WERE 
SNAPPED AND A POWER POLE BECAME SLANTED OVER. FARTHER EAST...A BARN 
ROOF WAS DESTROYED AND BLOWN DOWNSTREAM AND NUMEROUS TREES WERE 
SNAPPED.

THE TORNADO TRACK CURVED NORTHEASTERLY AT THIS TIME...REMOVED 
ROOFING PANELS FROM A DETACHED GARAGE NEAR DETRICK ROAD AND OLD 
ANNAPOLIS ROAD AND MOVED THROUGH THE LINGANORE WINERY PROPERTY... 
WHERE DAMAGE WAS SUSTAINED TO A WAREHOUSE ROOF...PAVILION ROOF AND 
TREES. SIX OR MORE SOFTWOOD TREES WERE SNAPPED...AND PIECES OF LARGE 
LIMBS AND PLYWOOD WERE IMPALED IN ADJACENT ROOFS. DAMAGE IN THIS 
SWATH WAS CONSISTENT WITH MAXIMUM WINDS OF 90 TO 100 MPH AND HAS 
BEEN RATED EF-1 ON THE ENHANCED FUJITA SCALE.

A DAMAGE SWATH ALSO WAS FOUND BEGINNING NEAR PEDDICORD ROAD AND 
TALBOT RUN ROAD. IN THIS VICINITY...SUBSTANTIAL TREE DAMAGE WAS 
NOTED. A WINDOW WAS BLOWN INTACT INWARD OUT OF ITS FRAME ON A 
SINGLE-FAMILY HOME ALONG CHELSEA ROAD. THE SWATH CONSISTED ALMOST
ENTIRELY OF DAMAGE TO TREES AS THE TORNADO MOVED NORTHEAST JUST
SOUTH OF BUFFALO ROAD AND BLACK ANKLE ROAD. HOWEVER...NEAR THIS
INTERSECTION...PINE TREES WERE SNAPPED AND SIDING AND TRIM WERE
TORN FROM A HOME...WHERE A PORTION OF A PORCH RAILING ALSO WAS
REMOVED. MODEST TREE DAMAGE CONTINUED THROUGH AN EQUESTRIAN SCHOOL
PROPERTY AND INTO CARROLL COUNTY...WHERE PATCHY TREE DAMAGE WAS
FOUND AND A POWER POLE WAS SNAPPED NEAR THE INTERSECTION OF MD-26
AND MD-27. DAMAGE IN THIS THIRD SWATH WAS CONSISTENT WITH MAXIMUM
WINDS OF 90 TO 100 MPH AND WAS RATED EF-1.

IN SUMMARY...THE DAMAGE SWATHS ACROSS EASTERN FREDERICK AND
WESTERN CARROLL COUNTIES IN NORTH CENTRAL MARYLAND WERE CLASSIFIED
PER NWS STANDARDS AS A SINGLE TORNADO...BUT LIKELY WERE CAUSED BY
THREE DISTINCT VORTICES.


...EF-0 TORNADO NEAR LEESBURG VA IN LOUDOUN COUNTY...

LOCATION...1 MI E HUGHESVILLE VA TO LEESBURG VA
DATE...APRIL 16 2011 
ESTIMATED START TIME...712 PM EDT 
ESTIMATED END TIME...716 PM EDT
MAXIMUM EF-SCALE RATING...EF-0
MAXIMUM WIND SPEED...70 MPH
PATH WIDTH...50 YARDS
PATH LENGTH...4.2 MILES
BEGINNING LAT/LON...39.0979N / 77.6376W
ENDING LAT/LON...39.1008N / 79.5616W
* FATALITIES...NONE
* INJURIES...NONE
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
  CHANGE PENDING FINAL REVIEW OF THE EVENT/S/ AND PUBLICATION IN
  NWS STORM DATA.

...SUMMARY...

RESULTS OF A DAMAGE SURVEY ALONG ROUTE 7...ROUTE 15 AND ADJACENT 
ROADWAYS SOUTH OF LEESBURG CONFIRMED A TRACK OF AN EF-0 TORNADO.
DAMAGE CONSISTED MAINLY OF SPORADIC SNAPPED TREE LIMBS AND A FEW
UPROOTED TREES IN THE NEIGHBORHOODS SURROUNDING WESTPARK GOLF
COURSE. A ROAD SIGN POST WAS PULLED FROM THE GROUND AND SNAPPED
ALONG CLUBHOUSE DRIVE.

TOWARD THE START OF THE TRACK ALONG CANBY ROAD...SEVERAL TREES WERE 
UPROOTED AND LIMBS WERE SNAPPED. SHINGLES ALSO WERE REMOVED FROM A 
HOME IN THIS VICINITY. A NOAA EMPLOYEE PROVIDED AN EYEWITNESS
ACCOUNT OF THE FUNNEL CLOUD FORMING JUST WEST OF CANBY ROAD. A
PROPERLY-SITED HOME WEATHER STATION IN THIS LOCATION MEASURED AN
UNOFFICIAL WIND GUST OF 65 MPH NEAR THE PATH OF THE DAMAGE.

TREE DAMAGE AT SECOND AVENUE AND SOUTH KING STREET LIKELY WAS THE 
RESULT OF STRAIGHT-LINE THUNDERSTORM WIND. THE TORNADO MOVED 
EASTWARD AND CROSSED ROUTE 7 AT THE DULLES GREENWAY INTERCHANGE 
BEFORE DISSIPATING.


...OTHER DAMAGE...

REPORTED TREE DAMAGE IN GREENE AND ALBEMARLE COUNTIES ALSO WAS
SURVEYED. OWING TO THE SPOTTY NATURE OF THE DAMAGE IN ALBEMARLE
COUNTY AND THE UNIDIRECTIONAL ORIENTATION OF THE DAMAGE IN GREENE
COUNTY...THE DAMAGE COULD NOT BE DETERMINED CONCLUSIVELY TO HAVE
BEEN CAUSED BY A TORNADO. PENDING ADDITIONAL INFORMATION...THE
DAMAGE IN THESE COUNTIES HAS BEEN ATTRIBUTED TO NON-TORNADIC
THUNDERSTORM WIND.

$$

SMZ/CS/MRK/JL


National Weather Service
Weather Forecast Office Baltimore/Washington
43858 Weather Service Rd.
Sterling, VA 20166
Phone: (703) 996-2200
Webmaster: lwxwebmaster@noaa.gov
Page last modified: Apr 25, 2011 5:26 PM EDT
Disclaimer
About Us
Credits
Privacy Policy
Career Opportunities
Glossary