785  
NOUS41 KLWX 191934  
PNSLWX  
DCZ001-MDZ003>006-011-013-014-016>018-501>508-VAZ025>031-036>040-  
050>057-501>508-WVZ050>053-055-501>506-192345-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
334 PM EDT WED APR 19 2017  
   
..SEVEN TORNADOES CONFIRMED ON APRIL 6 2017
 
 
A LINE OF SEVERE THUNDERSTORMS PRODUCED NUMEROUS INSTANCES OF  
STRAIGHT-LINE WIND DAMAGE FROM CENTRAL THROUGH NORTHERN VIRGINIA  
AND NORTH-CENTRAL MARYLAND, INCLUDING THE WASHINGTON DC AND  
BALTIMORE MD METRO AREAS. EMBEDDED ALONG THE LINE WERE SEVEN  
INSTANCES OF BRIEF TORNADIC DAMAGE.  
 
BELOW IS A SUMMARY OF TORNADOES CONFIRMED BY THE NATIONAL WEATHER  
SERVICE FORECAST OFFICE IN STERLING VA FOLLOWING EXTENSIVE SURVEYS  
AND DATA ANALYSIS.  
   
..TORNADO CONFIRMED NEAR UNIONVILLE IN ORANGE COUNTY VIRGINIA
 
 
LOCATION...NORTH OF UNIONVILLE IN ORANGE COUNTY VIRGINIA  
DATE...APRIL 6, 2017  
ESTIMATED TIME...1229 PM EDT TO 1233 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...85 MPH  
MAXIMUM PATH WIDTH...175 YARDS  
PATH LENGTH...2.7 MILES  
BEGINNING LAT/LON...38.28 N / 77.97 W  
ENDING LAT/LON...38.31 N / 77.94 W  
* FATALITIES...0  
* INJURIES...0  
 
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS  
STORM DATA.  
   
..SUMMARY
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED A TORNADO NEAR UNIONVILLE IN ORANGE COUNTY VIRGINIA  
ON APRIL 6, 2017.  
 
THE TORNADO CAUSED EXTENSIVE CONVERGENT TREE DAMAGE INTERMITTENTLY  
ALONG ITS PATH, ALONG WITH SOME MINOR STRUCTURAL DAMAGE. THE FIRST  
INSTANCES OF UPROOTED AND SNAPPED TREES OCCURRED NEAR THE  
INTERSECTION OF EVERONA ROAD AND DEERTRAIL LANE. THE TORNADO  
CONTINUED NORTH-NORTHEAST, CAUSING ADDITIONAL TREE DAMAGE ON  
SIGNAL HILL LANE.  
 
THE MOST EXTENSIVE IMPACTS OCCURRED ALONG US ROUTE 522 NEAR IDA MAE  
LANE, WHERE MANY OF THE TREES IN THE CONCENTRATED PATH OF THE  
TORNADO WERE EITHER SNAPPED OR UPROOTED IN DIFFERING DIRECTIONS. AT  
LEAST TWO TREES FELL ON STRUCTURES. METAL ROOFING AND SIDING WERE  
REMOVED FROM A BUSINESS ON THE SIDES OF THE BUILDING OPPOSING STORM  
MOTION. SOME OF THIS MATERIAL WAS LOFTED AND LANDED IN A YARD 0.4  
MILES AWAY. THE WALL OF AN OUTBUILDING WAS DISPLACED SEVERAL  
INCHES OFF ITS FOUNDATION. SEVERAL HOMES RECEIVED MINOR DAMAGE TO  
SHINGLES, GUTTERS, AND SIDING. TWO RESIDENTS IN THIS AREA WITNESSED  
THE TORNADO AND OBSERVED DEBRIS BEING LOFTED AND SWIRLING IN THE  
AIR. THE SURVEY CONCLUDED THAT THIS CONCENTRATED TORNADIC DAMAGE WAS  
EMBEDDED WITHIN A LARGER AREA OF VERY STRONG STRAIGHT-LINE WINDS, AS  
NUMEROUS TREES WERE DOWNED IN UNIDIRECTIONAL FASHION ALONG A 0.7 MILE  
STRETCH OF US 522.  
 
THE NEXT OBSERVABLE DAMAGE OCCURRED ON PINE STAKE ROAD NEAR CLOVER  
HILL FARM LANE. TREES WERE DOWNED IN A CONVERGENT PATTERN ALONG A  
NARROW PATH, AND A WOODEN FENCE SUSTAINED DAMAGE. THE TORNADO LIFTED  
AFTER THIS POINT, AS NO FURTHER DAMAGE WAS OBSERVED TO THE NORTH-  
NORTHEAST.  
 
THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK THE ORANGE COUNTY  
EMERGENCY MANAGEMENT AGENCY AND THE RESIDENTS INTERVIEWED FOR THEIR  
ASSISTANCE IN THIS SURVEY.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO  
THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
ADS  
   
..TORNADO CONFIRMED SOUTHWEST OF WARRENTON VA
 
 
LOCATION...SOUTHWEST OF WARRENTON IN FAUQUIER COUNTY VIRGINIA  
DATE...APRIL 6 2017  
ESTIMATED TIME...1258 PM EDT TO 1259 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...80 MPH  
MAXIMUM PATH WIDTH...50 YARDS  
PATH LENGTH...0.3 MILES  
BEGINNING LAT/LON...38.68 N / 77.86 W  
ENDING LAT/LON...38.68 N / 77.86 W  
* FATALITIES...0  
* INJURIES...0  
 
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS  
STORM DATA.  
   
..SUMMARY
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED A TORNADO SOUTHWEST OF WARRENTON IN FAUQUIER COUNTY  
VIRGINIA ON APRIL 6, 2017.  
 
AN EXTENSIVE AREA OF TREE DAMAGE WAS NOTED ALONG A SEVERAL MILE LONG  
PATH IN WEST-CENTRAL FAUQUIER COUNTY. EMBEDDED WITHIN THIS STRAIGHT-  
LINE WIND DAMAGE WAS A SMALL CONCENTRATED AREA OF CONVERGENT TREE  
DAMAGE CONSISTENT WITH AN EF-0 TORNADO.  
 
A ROW OF TREES JUST NORTH OF HARTS MILL ROAD WAS BLOWN DOWN TOWARDS  
THE WEST-NORTHWEST, WHILE SEVERAL OTHER TREES JUST SOUTH OF THE ROAD  
WERE SNAPPED AND FELL TOWARDS THE NORTHEAST. A SIMILAR PATTERN OF TREE  
DAMAGE WAS FOUND AT A RESIDENCE ON WOODBOURNE LANE A QUARTER MILE TO  
THE NORTHEAST, WHERE SEVERAL DOZEN HARDWOOD TREES WERE UPROOTED, MAINLY  
FALLING TOWARDS THE EAST BUT A COUPLE FELL TOWARDS THE WEST.  
 
FURTHER SOUTHWEST AND TO THE NORTHEAST OF THE TORNADIC DAMAGE,  
HARDWOOD AND SOFTWOOD TREES WERE SNAPPED AND UPROOTED BUT ALL FALLING  
TO THE NORTHEAST OVER A NEARLY MILE-WIDE SWATH, INDICATING STRAIGHT-LINE  
WIND DAMAGE. IT IS NOTABLE THAT THE STRAIGHT-LINE WIND DAMAGE WAS MORE  
SEVERE THAN THAT CAUSED BY THE BRIEF TORNADO.  
 
THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK THE FAUQUIER COUNTY  
EMERGENCY MANAGEMENT AGENCY AND THE RESIDENTS INTERVIEWED FOR THEIR  
ASSISTANCE IN THIS SURVEY.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO  
THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
SMZ  
   
..TORNADO CONFIRMED NORTH OF AIRLIE VA
 
 
LOCATION...NORTH OF AIRLIE IN FAUQUIER COUNTY VIRGINIA  
DATE...APRIL 6 2017  
ESTIMATED TIME...108 PM EDT TO 114 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...85 MPH  
MAXIMUM PATH WIDTH...75 YARDS  
PATH LENGTH...5.9 MILES  
BEGINNING LAT/LON...38.75 N / 77.82W  
ENDING LAT/LON...38.82 N / 77.75 W  
* FATALITIES...0  
* INJURIES...0  
 
*THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT  
TO CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION  
IN NWS STORM DATA.  
   
..SUMMARY
 
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED A TORNADO NEAR AIRLIE IN FAUQUIER COUNTY VIRGINIA ON APRIL  
6, 2017.  
 
THE TORNADO CAUSED A NEARLY CONTINUOUS PATH OF CONVERGENT TREE DAMAGE.  
LARGE TO MID SIZED TREES WERE SNAPPED AND UPROOTED. THE MOST INTENSE  
OF WHICH WAS THE RESULT OF ESTIMATED WIND SPEEDS OF 85 MPH THAT  
SNAPPED SEVERAL LARGE TREES ON AIRLIE ROAD BETWEEN ARTILLERY ROAD  
AND THE RAINFOREST TRUST. THE FIRST TREES DOWNED WERE NOTED JUST  
WEST OF US 17. AFTER CROSSING AIRLIE ROAD, THE TORNADO SNAPPED AND  
UPROOTED TREES ALL ALONG BLANTYRE ROAD. CONTINUOUS DAMAGE STOPPED  
JUST PRIOR TO INTERSTATE 66.  
 
THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK THE FAUQUIER COUNTY  
EMERGENCY MANAGEMENT AGENCY AND THE RESIDENTS INTERVIEWED FOR THEIR  
ASSISTANCE IN THIS SURVEY.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO  
THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
CAS/ADS  
   
..TORNADO CONFIRMED NEAR NEW BALTIMORE VA
 
 
LOCATION...NEAR NEW BALTIMORE IN FAUQUIER COUNTY VIRGINIA  
DATE...APRIL 6 2017  
ESTIMATED TIME...108 PM EDT TO 110 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...85 MPH  
MAXIMUM PATH WIDTH...75 YARDS  
PATH LENGTH...1 MILE  
BEGINNING LAT/LON...38.77 N / 77.72W  
ENDING LAT/LON...38.78 N / 77.72 W  
* FATALITIES...0  
* INJURIES...0  
 
*THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT  
TO CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION  
IN NWS STORM DATA.  
   
..SUMMARY
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED A TORNADO NEAR NEW BALTIMORE IN FAUQUIER COUNTY  
VIRGINIA ON APRIL 6, 2017.  
 
THE TORNADO CAUSED A CONTINUOUS PATH OF EXTENSIVE TREE DAMAGE,  
ALONG WITH SOME MINOR STRUCTURAL DAMAGE. THE FIRST INSTANCES  
OF UPROOTED AND SNAPPED TREES OCCURRED JUST NORTHWEST OF THE  
INTERSECTION OF LEE HIGHWAY AND ELECTRIC AVENUE. THE TORNADO  
CONTINUED NORTH-NORTHEAST, GENERALLY ALONG BEVERLYS MILL ROAD,  
CAUSING ADDITIONAL DAMAGE TO JUST NORTH OF FAIRVIEW LANE.  
 
EXTENSIVE TREE DAMAGE WAS FOUND ALONG THE TORNADO'S PATH,  
WHERE MANY HARDWOOD AND SOFTWOOD TREES WERE EITHER SNAPPED,  
TOPPED OR UPROOTED IN A CONVERGENT PATTERN. SEVERAL TREES  
FELL ON VEHICLES. WOODED FENCES WERE BLOWN DOWN IN SEVERAL  
LOCATIONS ALONG ITS PATH. A ROOF WAS PARTIALLY REMOVED FROM  
A BARN. OTHER METAL ROOFING WAS REMOVED FROM SMALLER OUTBUILDINGS.  
SEVERAL SHEDS WERE EITHER DESTROYED OR SEVERELY DAMAGED. MOST HOMES  
IN THE PATH HAD MINOR DAMAGE TO SHINGLES, GUTTERS AND SIDING.  
 
TWO RESIDENTS IN THE AREA WITNESSED THE TORNADO WITH DEBRIS  
BEING LOFTED.  
 
THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK FAUQUIER  
COUNTY EMERGENCY MANAGEMENT AGENCY AND THE RESIDENTS INTERVIEWED  
FOR THEIR ASSISTANCE IN THIS SURVEY.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES  
INTO THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
IMR  
   
..TORNADO CONFIRMED NEAR HERNDON AND STERLING PARK VA
 
 
LOCATION...HERNDON TO STERLING PARK IN FAIRFAX AND LOUDOUN  
COUNTIES IN VIRGINIA  
DATE...APRIL 6 2017  
ESTIMATED TIME...134 PM EDT TO 139 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...70 MPH  
MAXIMUM PATH WIDTH...25 YARDS  
PATH LENGTH...3.3 MILES  
BEGINNING LAT/LON...38.97 N / 77.41W  
ENDING LAT/LON...39.01 N / 77.38 W  
* FATALITIES...0  
* INJURIES...0  
 
* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS  
STORM DATA.  
   
..SUMMARY
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED A TORNADO NEAR HERNDON AND STERLING PARK IN FAIRFAX AND  
LOUDOUN COUNTIES IN VIRGINIA ON APRIL 6, 2017.  
 
A PATH OF SPORADIC DAMAGE, MAINLY TO TREES, BEGAN JUST EAST  
OF ROCK HILL ROAD IN BETWEEN THE DULLES GREENE AND CAPSTONE  
APARTMENT COMPLEXES IN HERNDON. ABOUT A HALF DOZEN TREES HERE  
WERE EITHER SNAPPED OR UPROOTED IN A CONVERGENT PATTERN. ONE OF  
THE TREES WAS THROWN INTO THE WINDOW OF A NEARBY APARTMENT  
BUILDING.  
 
THE TORNADO CONTINUED NORTH-NORTHEAST, WHERE ADDITIONAL TREE  
DAMAGE WAS NOTED NEAR THE INTERSECTIONS OF SUMMERFIELD DRIVE  
AND AUTUMN BREEZE COURT, AND STERLING ROAD (VA-606) AND  
HERNDON PARKWAY. SEVERAL TREES WERE DOWNED FROM EAST TO WEST,  
AND FENCING WAS BLOWN DOWN NORTH TO SOUTH.  
 
IT APPEARS THE TORNADO LIFTED BRIEFLY AS IT CONTINUED  
NORTH-NORTHEAST, BEFORE TOUCHING DOWN AGAIN NEAR THE INTERSECTION  
OF CRESTVIEW DRIVE AND BUILDERS ROAD. HERE, NEARLY A DOZEN TREES  
WERE SNAPPED OR UPROOTED, MAINLY TO THE NORTH, WITH FENCING  
BLOWN DOWN TOWARDS THE TREES (TO THE WEST).  
 
ADDITIONAL MINOR AND SPORADIC TREE DAMAGE WAS NOTED IN A  
NORTH-NORTHEASTWARD PATH, WITH SEVERAL TREES SNAPPED AND  
UPROOTED AND AN INSTANCE OF SIDING DAMAGE NOTED BY A TRAINED  
SPOTTER JUST EAST OF SOUTH LINCOLN AVENUE. THE TORNADO LIKELY  
LIFTED FOR A FINAL TIME JUST NORTHEAST OF THE INTERSECTION OF  
EAST FREDERICK DRIVE AND SUGARLAND ROAD IN STERLING PARK.  
 
THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK FAIRFAX AND LOUDOUN  
COUNTY EMERGENCY MANAGEMENT AGENCY AND THE RESIDENTS INTERVIEWED  
FOR THEIR ASSISTANCE IN THIS SURVEY.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES  
INTO THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
LEE/SMZ  
   
..TORNADO CONFIRMED IN ARLINGTON VA AND WASHINGTON DC
 
 
LOCATION...ARLINGTON VIRGINIA TO WASHINGTON DC  
DATE...APRIL 6 2017  
ESTIMATED TIME...139 PM EDT TO 145 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...70 MPH  
MAXIMUM PATH WIDTH...50 YARDS  
PATH LENGTH...4.5 MILES  
BEGINNING LAT/LON...38.85 N / 77.07 W  
ENDING LAT/LON...38.90 N / 77.01 W  
* FATALITIES...0  
* INJURIES...1  
 
* 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
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED AN EF-0 TORNADO INITIATING IN ARLINGTON VA AND ENDING IN  
WASHINGTON DC ON APRIL 6, 2017.  
 
TREES WERE SNAPPED ALONG INTERSTATE 395 ADJACENT TO ARMY-NAVY  
COUNTRY CLUB AT APPROXIMATELY 1:39 PM EDT. VIDEO OF A PORTION OF  
THE PENTAGON PARKING LOT SHOWED A VORTEX CROSS BETWEEN TWO LIGHT  
POLES, RIPPING OFF ONE LAMP FROM THE TOP OF THE POLES. ADDITIONAL  
VIDEO FROM THE PENTAGON SHOWED TWO ROPE-LIKE FUNNEL CLOUDS FORM AT  
THE SAME TIME, ALTHOUGH IT COULD NOT BE DETERMINED FROM THE VIDEO  
WHETHER THESE FUNNELS TOUCHED THE GROUND OR WERE ATTACHED TO THE  
CLOUD BASE.  
 
ARLINGTON COUNTY FIRE DEPARTMENT IN CRYSTAL CITY PROVIDED CARE FOR  
1 PATIENT WITH MINOR INJURIES WHEN PART OF A MACYS STOREFRONT FELL  
ON A CAR.  
 
VIDEO FROM THE NATIONAL PARK SERVICE NATIONAL MALL AND  
MEMORIAL PARKS SHOWED A WATERSPOUT OVER THE POTOMAC RIVER WEST OF  
THE TIDAL BASIN; HOWEVER, IT IS NOT CLEAR THE VERTICAL EXTENT OF  
THIS WATERSPOUT AND WHETHER IT WAS SOURCED FROM THE CLOUD BASE, OR  
AN INDEPENDENT VORTEX ASSOCIATED WITH THE GUST FRONT.  
 
THE WATERSPOUT THEN MOVED ONSHORE NEAR THE GEORGE MASON MEMORIAL  
AT THE TIDAL BASIN AT APPROXIMATELY 1:41 PM EDT. HERE, MULTIPLE  
LARGE SOFTWOOD AND HARDWOOD TREES, INCLUDING SEVERAL ORNAMENTAL  
CHERRY TREES, HAD LARGE BRANCHES DOWNED AND/OR WERE UPROOTED  
AROUND THE TIDAL BASIN. WHILE SOME MINOR TREE DAMAGE WAS EVIDENCED  
NEAR THE GEORGE MASON MEMORIAL ON THE SOUTHWEST SIDE OF THE TIDAL  
BASIN, THE MOST CONCENTRATED DAMAGE WAS IN THE GROVE OF TREES  
DIRECTLY ADJACENT TO THE PARKING LOT OF THE TIDAL BASIN MARINA.  
 
THE LAST DAMAGE REPORTED TO THE NWS WAS TO THE ROOF OF THE ST.  
ALOYSIUS CHURCH AT THE INTERSECTION OF NORTH CAPITOL AND I  
STREETS NW AT 145 PM EDT.  
 
THIS TORNADO IS RATED EF-0 WITH ESTIMATED WINDS 65-70 MPH, PATH  
LENGTH OF 4.5 MILES, AND A PATH WIDTH OF 25-50 YARDS. THE WIND  
ESTIMATES WERE BASED ON THE DAMAGE OBSERVED, WEATHER RADAR  
VELOCITY OBSERVATIONS FROM THE KLWX WSR-88D AND FROM FEDERAL  
AVIATION ADMINISTRATION TERMINAL DOPPLER WEATHER RADARS AT JOINT  
BASE ANDREWS AND REAGAN NATIONAL AIRPORT, AND THE FACT THAT  
SEVERAL OF THE LARGER DOWNED TREES AROUND THE TIDAL BASIN HAD  
EVIDENCE OF AMPLE ROT IN THE BASE OF THEIR TRUNKS.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES  
INTO THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
LEE  
   
..TORNADO CONFIRMED NEAR ANACOSTIA IN SOUTHEAST WASHINGTON DC
 
 
LOCATION...JOINT BASE ANACOSTIA BOLLING AND ANACOSTIA DC  
DATE...APRIL 6 2017  
ESTIMATED TIME...141 PM EDT TO 143 PM EDT  
MAXIMUM EF-SCALE RATING...EF-0  
ESTIMATED MAXIMUM WIND SPEED...75 MPH  
MAXIMUM PATH WIDTH...25 YARDS  
PATH LENGTH...2.2 MILES  
BEGINNING LAT/LON...38.84 N / 77.02 W  
ENDING LAT/LON...38.86 N / 76.99 W  
* FATALITIES...0  
* INJURIES...1  
 
* 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
 
 
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON DC HAS  
CONFIRMED AN EF-0 TORNADO INITIATING IN JOINT BASE ANACOSTIA BOLLING  
AND CONTINUING INTO ANACOSTIA DC ON APRIL 6, 2017. ON THE TWO MILE  
PATH, THE WEAK TORNADO CAUSED SEVERAL SMALL AND MIDSIZED TREES TO BE  
SNAPPED AND UPROOTED ON BASE IN A CONVERGENT MANNER. FLAGS WERE  
STRIPPED OFF THEIR POSTS IN THE CENTRAL ROUNDABOUT. A LARGE SOCCER  
NET WAS THROWN FROM THE ATHLETIC FIELD. SHINGLE DAMAGE WAS NOTED TO  
ONE OF THE BUILDINGS. AS THE TORNADO CROSSED OVER INTERSTATE 295 IT  
LIKELY LIFTED OFF THE GROUND. TREES WERE SNAPPED HIGHER UP ON THE  
TRUNKS ON THE HILL JUST EAST OF THE INTERSTATE. AN APARTMENT COMPLEX  
WAS UNROOFED ON STANTON RD SE. MEDIA REPORTED ONE PERSON WAS INJURED  
BY FLYING DRYWALL.  
 
THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT  
WEATHER.GOV/WASHINGTON.  
 
FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES  
INTO THE FOLLOWING CATEGORIES:  
 
EF0...WIND SPEEDS 65 TO 85 MPH.  
EF1...WIND SPEEDS 86 TO 110 MPH.  
EF2...WIND SPEEDS 111 TO 135 MPH.  
EF3...WIND SPEEDS 136 TO 165 MPH.  
EF4...WIND SPEEDS 166 TO 200 MPH.  
EF5...WIND SPEEDS GREATER THAN 200 MPH.  
 

 
 
CAS  
 

 
 
DH/IMR/SMZ  
 
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