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11/04/2018, 6:56 am EST

BGE Severe Weather Event Report: Friday November 2 Tornado

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.  
07/29/2018, 11:34 am EST

BGE Severe Weather Events: High Wind July 27th.

3 in. of rain and many damaging wind gust reports from last evening  Discussion: Last evening’s SEVERE WEATHER episode was most notable due to damaging wind gusts exceeding 50 mph. Here are the storm reports issued by NOAA/SPC for Maryland much occurring in or near the BGE service area: 1940 UNK 2 SSW NORTH POTOMAC MONTGOMERY MD 3907 7726 TREE DOWN ON POWER LINES IN THE 13100 BLOCK OF TRAVILAH ROAD. (LWX)   1955 UNK 1 S FUNKSTOWN WASHINGTON MD 3959 7771 TREE DOWN NEAR THE INTERSECTION OF WAGAMAN ROAD AND GARIS SHOP ROAD. (LWX) 2020 UNK ROXBURY MILLS HOWARD MD 3925 7705 TREE DOWN ON MD 97 SOUTH OF ROXBURY MILL RD. (LWX) 2035 UNK ROXBURY MILLS HOWARD MD 3925 7705 TREE DOWN ON MD 97 SOUTH OF ROXBURY MILL RD. (LWX)   2052 UNK 2 ESE OAKLAND BALTIMORE MD 3940 7686 TREE DOWN AT LIBERTY ROAD AND WARDS CHAPEL ROAD. (LWX) 2057 UNK 1 NNE POINT OF ROCKS FREDERICK MD 3929 7753 TREE IN ROADWAY ON MD-464 JUST WEST OF US-15. (LWX) 2102 UNK 3 NNE POINT OF ROCKS FREDERICK MD 3931 7751 LARGE TREE DOWN BLOCKING US-15 NEAR BASFORD ROAD. (LWX)   2106 UNK 2 SE FREDERICK FREDERICK MD 3941 7740 WIRES DOWN NEAR THE INTERSECTION OF EAST PATRICK STREET AND HAMILTON AVENUE. (LWX)   2110 UNK 2 E PARK MILLS FREDERICK MD 3930 7737 WIRES DOWN NEAR THE INTERSECTION OF PETERS ROAD AND THURSTON ROAD. (LWX) 2110 UNK 3 ESE BALLENGER CREEK FREDERICK MD 3936 7739 TREE DOWN BLOCKING MD-355 NEAR BALL ROAD. (LWX) 2115 UNK 1 N JARRETTSVILLE HARFORD MD 3962 7648 TREE DOWN IN THE 3900 BLOCK OF FEDERAL HILL ROAD. (LWX)   2123 UNK LINTHICUM ANNE ARUNDEL MD 3921 7667 MULTIPLE TREES DOWN IN THE LINTHICUM AREA. (LWX) 2123 UNK 1 NW NEW MARKET FREDERICK MD 3939 7729 TREE ON POWER LINES ON BOYERS MILL ROAD BETWEEN FINN DRIVE AND NEW MARKET COURT. (LWX)   2129 UNK 1 SE TIMONIUM BALTIMORE MD 3943 7661 TREE DOWN AT THE 200 BLOCK OF WELFORD ROAD. (LWX) 2130 UNK 1 ENE CLARKSBURG MONTGOMERY MD 3925 7726 TREE DOWN ON WIRES IN THE 23900 BLOCK OF STRINGTOWN ROAD. (LWX) 2134 UNK 2 ESE LIBERTYTOWN FREDERICK MD 3947 7721 WIRES DOWN IN THE 8700 BLOCK OF MAPLEVILLE ROAD. (LWX)   2147 UNK 2 WNW KINGSVILLE BALTIMORE MD 3946 7646 TREE DOWN AT THE GLEN ARM ROAD AND HARTFORD ROAD. (LWX) 2157 UNK 3 NNE JOPPA HARFORD MD 3947 7634 TREE DOWN NEAR THE INTERSECTION OF SINGER ROAD AND WINTERS RUN ROAD. (LWX) 2158 UNK 2 WSW BYNUM HARFORD MD 3956 7640 TREE DOWN NEAR INTERSTECTION OF GRAFTON SHOP ROAD AND OSBORNE PARKWAY. (LWX)   2200 UNK ABINGDON HARFORD MD 3946 7628 TREE DOWN NEAR THE INTERSECTION OF FEDERAL LANE AND ABINGDON ROAD. (LWX) 2200 UNK 2 WNW HARFORD HARFORD MD 3950 7631 TREE DOWN NEAR THE INTERSECTION OF EAST WHEEL ROAD AND CEDAR LANE. (LWX) 2200 UNK 1 SW BEL AIR HARFORD MD 3952 7636 TREE LIMB DOWN BLOCKING ROADWAY NEAR THE INTERSECTION OF NORTH TOLLGATE ROAD AND BOULTON STREET. (LWX) 2200 UNK BEL AIR HARFORD MD 3953 7634 LARGE TREE ACROSS THE ROADWAY NEAR THE INTERSECTION OF BARNES STREET AND POWELL AVENUE. (LWX) 2201 UNK 2 SW PERRYMAN HARFORD MD 3945 7623 TREE AND WIRES DOWN NEAR THE INTERSECTION OF FOREST GREEN ROAD AND PARK BEACH DRIVE. (LWX) 2201 UNK 1 SE HARFORD HARFORD MD 3948 7625 TREE DOWN NEAR THE INTERSECTION OF BELCAMP ROAD AND SANFORD COURT. (LWX) 2201 UNK 3 W HARFORD HARFORD MD 3949 7632 TREE DOWN NEAR THE INTERSECTION OF LAUREL BUSH ROAD AND TEMPLE DRIVE. (LWX) 2202 UNK 1 NE BEL AIR HARFORD MD 3954 7634 WIRES DOWN IN THE 600 BLOCK OF LEE WAY. (LWX)   2201 UNK 2 SW PERRYMAN HARFORD MD 3945 7623 TREE AND WIRES DOWN NEAR THE INTERSECTION OF FOREST GREEN ROAD AND PARK BEACH DRIVE. (LWX) 2201 UNK 1 SE HARFORD HARFORD MD 3948 7625 TREE DOWN NEAR THE INTERSECTION OF BELCAMP ROAD AND SANFORD COURT. (LWX) 2201 UNK 3 W HARFORD HARFORD MD 3949 7632 TREE DOWN NEAR THE INTERSECTION OF LAUREL BUSH ROAD AND TEMPLE DRIVE. (LWX) 2202 UNK 1 NE BEL AIR HARFORD MD 3954 7634 WIRES DOWN IN THE 600 BLOCK OF LEE WAY. (LWX) 2203 UNK 1 WSW PERRYMAN ANZ530 MD 3946 7623 TREE DOWN NEAR THE INTERSECTION OF WILSON AVENUE AND ABINGDON ROAD. (LWX) 2204 UNK 1 NNE ABINGDON HARFORD MD 3948 7627 TREE DOWN IN THE 1000 BLOCK OF HOOKERS MILL ROAD. (LWX) 2204 UNK 1 NNE PERRYMAN HARFORD MD 3948 7620 TREE DOWN NEAR THE INTERSECTION OF MD-159 PERRYMAN ROAD AND CRANBERRY ROAD/ADVANTAGE AVENUE. (LWX) 2204 UNK 2 SSE BEL AIR HARFORD MD 3951 7633 TREE DOWN NEAR INTERSECTION OF WESTWOOD DRIVE AND BONNIE AVENUE. (LWX) 2207 UNK 2 NW HARFORD HARFORD MD 3951 7628 TREE DOWN BLOCKING THE ROADWAY IN THE 1700 BLOCK OF SOUTH FOUNTAIN GREEN ROAD. (LWX) 2207 UNK 3 NE SCARBORO HARFORD MD 3967 7625 TREE DOWN IN THE 1800 BLOCK OF CASTLETON ROAD. (LWX) Radar estimates indicate the maximum rainfall amount was just under 3 in. on the central Baltimore/Harford County line, eastern Baltimore City and due west of Baltimore in northern Howard County. 1-2 in. of rain surrounded this area on a west-to-east arc. Parts of Carroll County received 2+ in. of rain otherwise northern service area missed out on the heavy rainfall. BWI recorded 0.97 in. of rain. The July rainfall is now a record 16.40 in.
06/19/2018, 4:31 am EST

BGE Storm Report For June 18, 2018

Unexpected isolated strong storms into BGE service area June 18th   Discussion: A thunderstorm formed north-northeast of Martinsburg, WV mid-afternoon Monday June 18th and moved east-southeast and intensifying reaching the BGE Service Area in-between 4 and 5 PM. The storm is characterized as “severe” by Climate Impact Company due to the likelihood of wind gusts exceeding 50 MPH to cause storm reports in Carroll, Howard and Baltimore Counties (Table 1). Location Character Time Sykesville, Carroll County Multiple trees/wires down. 4:20 PM Gaither, Howard County Downed trees 4:23 PM Towson, Baltimore County Multiple reports of trees down 4:28 PM Friendship, Howard County Downed trees 4:28 PM Pikesville, Baltimore County Multiple trees down, blocked roads 4:44 PM Pikesville, Baltimore County Multiple trees down 4:47 PM Table 1: Storm Prediction Center report of damage caused by high wind related to a severe thunderstorm in the BGE Service Area yesterday. Radar indicates the rainfall that occurred with these storm was minor, generally 0.25 to 0.50 in. mostly on the lower end of that range.  Hot temperatures and high humidity caused convective available potential energy (CAPE) values to easily eclipse 2000 j/kg which supports strong to severe thunderstorms if a trigger to ignite activity is present. Fig 1: The high-resolution rapid refresh (HRRR) model depiction of thunderstorm activity in the BGE Service Area between 4 and 5 PM Monday June 18 is indicated. Fig. 2: Convective available potential energy forecast across the BGE Service Area ahead of the approaching thunderstorms indicated buoyant >2000 J/KG range certainly supporting strong-to-severe thunderstorms. Summary: A large area of severe thunderstorms producing many wind damage reports occurred across the Northeast U.S. on Monday. The event affecting the BGE Service Area between 4 and 5 PM Monday afternoon was not part of that complex but rather an isolated thunderstorm which became severe moving into an area of high instability across the BGE Service Area. The storm was likely initiated by the elevated terrain in south-central Pennsylvania rather than any synoptic meteorological diagnostic. Once the storm developed and moving east-southeast the drift into the unstable atmosphere across the BGE Service Area enabled intensification. Although not officially measured the damage reported by this isolated storm indicates wind gusts exceeding 50 mph qualifying the storm as severe. Fig. 3: Storm Prediction Center reports of damage caused by severe thunderstorms on Monday June 18th. The isolated severe thunderstorm affecting the BGE Service Area was not part of a larger severe weather outbreak to the north.
05/28/2018, 6:09 am EST

BGE Storm Review: Ellicott City 8 in. of Rain May 27

Ellicott City, MD hit by 8 in. of rain in 3-hour period on Sunday May 27 Summary: As a weak “backdoor” cold front surged southward into the BGE Service Area Sunday afternoon a line of thunderstorms quickly evolved just north of Baltimore expanding westward along the frontal boundary. Convective available potential energy was >2000 j/kg and arrival of the cold front was in prime time to produce deep convection. Dew points were in the mid 70’s indicating an unusually high amount of moisture in the lower atmosphere. As the line of thunderstorms extended westward and intensified rainfall rates of nearly 3 in. per hour developed. In a 3-hour period Ellicott City which is 13 miles west of Baltimore received 8 in. of rain. Baltimore City missed the intense rain receiving a little over 1 in. Wind gusts within the squall line were generally in the 34-45 mph range. Flood warnings remain in effect until 7 AM for the far west/southwest BGE service area this morning.