National Weather Service Confirms 2 Tornadoes Friday Evening NWS Reports on Each Tornado Below Discussion: The National Weather Service has confirmed 2 tornadoes both rated EF1 touched down in Baltimore City and Carroll County Friday evening. The Baltimore City tornado caused heavy damage to an apartment complex and Amazon Warehouse where 2 people were killed. The tornado striking Baltimore was on the ground for a 2.5 mile path. EF1 tornadoes produce 105 mph wind. A review of each tornado as identified by the National Weather Service is below… PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 444 PM EDT SAT NOV 3 2018 …NWS DAMAGE SURVEY FOR CITY OF BALTIMORE AND BALTIMORE COUNTY TORNADO EVENT ON 2 NOVEMBER 2018… .CITY OF BALTIMORE AND BALTIMORE COUNTY EF-1… START LOCATION…BALTIMORE MD END LOCATION…DUNDALK IN BALTIMORE COUNTY MD DATE…NOVEMBER 2, 2018 ESTIMATED TIME…9:42 PM EDT MAXIMUM EF-SCALE RATING…EF-1 ESTIMATED MAXIMUM WIND SPEED…105 MPH MAXIMUM PATH WIDTH…150 YARDS PATH LENGTH…2.5 MILES BEGINNING LAT/LON…39.2700/-76.5552 ENDING LAT/LON…39.2740/-76.5080 * FATALITIES…2 * INJURIES…1 …SUMMARY… A TORNADO TOUCHED DOWN IN BALTIMORE CITY AT 9:42 PM EST ON FRIDAY EVENING NOVEMBER 2, 2018. INITIAL DAMAGE WAS TO A TRACTOR TRAILER WHICH WAS BLOWN OVER ON INTERSTATE 95 JUST NORTH THE FORT MCHENRY TUNNEL, AND A FENCE LINE BLOWN OVER ON SOUTH NEWKIRK STREET. FROM THERE THE TORNADO TRACKED EAST AS IT MOVED NEARLY PARALLEL TO HOLABIRD AVENUE. IT BLEW IN LARGE GARAGE DOORS ON BOTH SIDES OF THE BUILDING AT FLEXI-VAN LEASING FACILITY. AS IT MOVED EAST AND IMPACTED THE NORTH BUILDING OF THE AMAZON SORTING FACILITY, THE TORNADO REACHED PEAK INTENSITY OF APPROXIMATELY 105 MPH WHICH SUPPORTS THE RATING OF EF-1. THERE IT BLEW OFF THE ROOF OF A PORTION OF THE BUILDING, INCLUDING IRON RAFTERS. WITH THE LOSS OF THE ROOF, THE EIGHT INCH CONCRETE WALL PANELS PUSHED IN AND COLLAPSED INTO THE BUILDING TOWARDS THE NORTH END OF THE WEST WALL. TWO FATALITIES OCCURRED INSIDE THE BUILDING WITH THE WALL COLLAPSE. ABOUT A DOZEN TRUCK TRAILERS WERE PUSHED OVER, MOVED, OR ROLLED BY THE WIND. TWO OF THE TRAILERS WERE NOTED TO HAVE BEEN BLOWN IN AN OPPOSITE DIRECTION OF THE WIND THAT TOPPLED THE WALL. SEVERAL LIGHT STANCHIONS AND SIGNS WERE BLOWN OVER. SEVERAL CAR WINDOWS WERE BLOWN OUT BY FLYING DEBRIS. THE TORNADO CONTINUED EAST ALONG THE SOUTH SIDE OF HOLABIRD AVE., UPROOTING SEVERAL LARGE TREES, AND SNAPPING DOZENS OF LARGE TREE BRANCHES. DAMAGE ALONG THE ENTIRE PATH WAS MAINLY CONVERGENT, AND WHILE MUCH OF THE DAMAGE WAS FROM WEST-SOUTHWEST TO EAST-NORTHEAST, THERE WERE SEVERAL NOTABLE EXCEPTIONS OF DAMAGE IN DIFFERING DIRECTIONS. AN EYEWITNESS FIRE FIGHTER OUTSIDE THE BALTIMORE CITY FIRE DEPARTMENT ENGINE 50 FIREHOUSE IN THE AREA SAW THE SWIRLING DEBRIS AND THE FUNNEL CLOUD AS IT PASSED. THE TORNADO LIFTED AS IT REACHED THE INTERSECTION WITH DUNDALK AVENUE. AFTER IT INITIALLY LIFTED, THE TORNADO BRIEFLY TOUCHED DOWN ONE LAST TIME ON THE HOLABIRD EAST APARTMENTS ON 4 GEORGES CT IN DUNDALK, IN ADJACENT BALTIMORE COUNTY. THE NORTHEAST BUILDING IN THE COMPLEX WAS UNROOFED ENTIRELY. THE STRONG SOUTHWEST WIND HIT THE BUILDING BROADSIDE AND LIFTED THE ROOF OFF THE BUILDING. NO OTHER DAMAGE WAS NOTED IN THE AREA. A RESIDENT REPORTED SWIRLING WINDS WITH THE EVENT. THE NATIONAL WEATHER SERVICE EXTENDS ITS GRATITUDE TO THE BALTIMORE CITY FIRE DEPARTMENT, THE MAYOR’S OFFICE OF EMERGENCY MANAGEMENT, AND THE BALTIMORE COUNTY OFFICE OF HOMELAND SECURITY AND EMERGENCY MANAGEMENT FOR THEIR ASSISTANCE WITH THE DAMAGE SURVEY. EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE FOLLOWING CATEGORIES: EF0…WEAK……65 TO 85 MPH EF1…WEAK……86 TO 110 MPH EF2…STRONG….111 TO 135 MPH EF3…STRONG….136 TO 165 MPH EF4…VIOLENT…166 TO 200 MPH EF5…VIOLENT…>200 MPH * THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS STORM DATA. PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 824 PM EDT SAT NOV 3 2018 …NWS DAMAGE SURVEY FOR MT. AIRY TORNADO EVENT ON 2 NOVEMBER 2018… .MT. AIRY EF-1 TORNADO EVENT… START LOCATION…EXTREME NORTHWEST HOWARD COUNTY MD END LOCATION…MT. AIRY IN CARROLL COUNTY MD DATE…NOV 2 2018 ESTIMATED TIME…8:20 PM EDT MAXIMUM EF-SCALE RATING…EF1 ESTIMATED MAXIMUM WIND SPEED…100 MPH MAXIMUM PATH WIDTH…400 YARDS PATH LENGTH…4.7 MILES BEGINNING LAT/LON…39.3482/-77.1574ABOUT ENDING LAT/LON…39.4046/-77.1086 * FATALITIES…0 * INJURIES…0 …SUMMARY… A TORNADO TOUCHED DOWN IN EXTREME NORTHWEST HOWARD COUNTY MD, APPROXIMATELY 1 MILE SOUTH OF INTERSTATE 70 AROUND 8:20 PM EDT. THE TORNADO QUICKLY MOVED NORTH OF THE SOUTH BRANCH OF THE PATAPSCO INTO CARROLL COUNTY, WHERE NUMEROUS TREES WERE DOWNED IN THE PHEASANT RIDGE AREA SOUTH OF INTERSTATE 70. THE TORNADO PROCEEDED TO MOVE INTO THE RETAIL AREA OF MT. AIRY, WHERE A CANOPY OVER THE GAS PUMPS AT HIGH’S DAIRY STORE WAS PARTIALLY TORN OFF, AND THE TJ MAXX ROOF WAS LIFTED UP AND PARTIALLY REMOVED. THERE WERE ALSO NUMEROUS TREES DOWN BEHIND THE SHOPPING CENTER NEAR THE WATER TOWER. THE TORNADO THEN CONTINUED NORTH, WHERE THE ROOFS OF SEVERAL OUTBUILDINGS OF KNILLS FARM MARKET WERE AT LEAST PARTIALLY BLOWN OFF AND A SILO WAS DESTROYED. AS THE TORNADO CROSSED WATERSVILLE ROAD, IT SNAPPED SEVERAL POWER POLES, WHICH MERITED THE MAXIMUM WIND ESTIMATE OF 100 MPH, ALONG WITH THE SNAPPING OF FIVE PINE TREES AT A RESIDENCE ON WATERSVILLE ROAD. SEVERAL RESIDENCES ALONG ARROWWOOD CIRCLE WERE IMPACTED WITH MINOR STRUCTURAL DAMAGE. NUMEROUS HARDWOOD TREES WERE SNAPPED ALONG THE 6000 BLOCK OF RUNKLES ROAD. THE LAST EVIDENCE OF TORNADIC DAMAGE WAS OBSERVED ON GILLIS FALLS ROAD WHERE A FEW TREES WERE UPROOTED JUST EAST OF RUNKLES ROAD. RADAR IMAGERY FROM THE FAA’S TERMINAL DOPPLER WEATHER RADAR SHOWED THE TORNADIC COUPLET DISSIPATE NORTH OF GILLIS FALLS ROAD. THE NATIONAL WEATHER SERVICE EXTENDS ITS GRATITUDE TO THE CARROLL COUNTY DEPARTMENT OF PUBLIC SAFETY, EMERGENCY MANAGEMENT, AND THE CARROLL COUNTY SHERRIF’S OFFICE FOR PROVIDING DRONE RECONNAISSANCE SUPPORTING THE DAMAGE SURVEY. EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE FOLLOWING CATEGORIES: EF0…WEAK……65 TO 85 MPH EF1…WEAK……86 TO 110 MPH EF2…STRONG….111 TO 135 MPH EF3…STRONG….136 TO 165 MPH EF4…VIOLENT…166 TO 200 MPH EF5…VIOLENT…>200 MPH * THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN NWS STORM DATA. CIC discussion: The squall line causing the severe weather including 2 tornado events across the BGE Service Area emerged mid-evening Friday ahead of a suddenly developing low pressure system initially in northwest Virginia. The surface fronts/radar depiction in Fig. 1 identify the position of the developing low pressure area at 8PM. Interestingly, the trail of thunderstorm activity extending to the Florida Peninsula – identifying axis of maximum low-level moisture – is along the coast in the Mid-Atlantic region. Implied is the severe weather event which struck Baltimore was caused more so by a rapidly steepening lapse rate coupled with already sharp directional wind shear more related to the upper trough west of the Appalachians. Ahead of any cold front there is usually a pool of cold air in the upper atmosphere to the west. In this case that pool of cold air was getting colder while convective currents were lifting subtropical moisture aloft into the upper atmosphere. This process caused the sensible weather to intensify on the back end of the general heavy rain/thunderstorm event and cross the BGE Service Area late Friday evening. This set of circumstances while not unique is certainly very unusual for early November. Due to the nocturnal nature of the event there were no extraordinary severe weather indices identifying presence of the event. Surface analysis at 11PM (Fig. 2) indicates the low pressure area causing the severe weather was just northeast of Baltimore. The track of this system was right through the BGE Service Area. NWS Baltimore/Washington discussions indicated 2-in. per hour rainfall rates associated with this squall line and now echoes but tornado confirmation via radar was not discernable. NWS Baltimore/Washington investigation done on Saturday confirmed 2 tornadoes as described above. Fig. 1: At 8PM EDT FRI Nov. 2, 2018 a low pressure area formed on a cold front in northwest Virginia. Heavy rain/strong thunderstorms northeast of the developing low pressure were already in-place. A squall line formed just northeast of the low pressure area mid-evening. Fig. 2: At 11PM EDT FRI Nov. 2, 2018 the low pressure area causing the tornado event across Baltimore late Friday evening moved to near Philadelphia. The severe weather was lifting northeastward and away from Baltimore but losing intensity.