A late season heat wave will continue across portions of California into the Desert Southwest. Meanwhile, Tropical Storm Milton is strengthening in the southwest Gulf of Mexico. Milton is expected to become a major hurricane and bring significant impacts to Florida this upcoming week. Read More >
Overview
In advance of an amplified upper-level trough from Hudson Bay southward to the Great Lakes/Ohio Valley, a narrow corridor of unstable air surged northward into the coastal Mid-Atlantic region during the afternoon and evening of 13 June 2019. With steep low-level lapse rates and improving deep-layer shear aided by the approach of the trough, low-topped convection developed to our west along and in advance of a cold front during the afternoon. A particularly intense portion of the increasingly organized storms affected northeast Maryland. As the storm crossed Chesapeake Bay, it is suspected to have produced a waterspout that moved onshore, producing considerable damage to trees in Elk Neck State Park in Cecil County. Several reports of wind damage occurred eastward through southeast Cecil County, southern New Castle County, and Salem County, before the storm made a marked left turn into Gloucester County. The storm produced two tornadoes here: one in the Mullica Hill area and the other in the Deptford and Blackwood areas before dissipating in Camden County. Additionally, the organized line of storms produced torrential rainfall, with several reports of flash flooding in the Philadelphia and Wilmington areas. |
Composite radar loop of the Gloucester County tornadoes on 13 June 2019. |
Synoptic Overview at 12z 13 June 2019 (courtesy of SPC)
Figure 1: 250-mb analysis | Figure 2: 300-mb analysis | Figure 3: 500-mb analysis |
Figure 4: 700-mb analysis | Figure 5: 850-mb analysis | Figure 6: 925-mb analysis |
Synoptic Overview at 00z 14 June 2019 (courtesy of SPC)
Figure 7: 250-mb analysis | Figure 8: 300-mb analysis | Figure 9: 500-mb analysis |
Figure 10: 700-mb analysis | Figure 11: 850-mb analysis | Figure 12: 925-mb analysis |
Surface Maps (courtesy of WPC)
Figure 13: 15z surface map | Figure 14: 18z surface map | Figure 15: 21z surface map |
Figure 16: 00z surface map | Figure 17: 03z surface map | Figure 18: 06z surface map |
Figure 19: 12z Upton, NY sounding | Figure 20: 12z Sterling, VA sounding | Figure 21: 12z Wallops Island, VA sounding |
Figure 22: 00z Upton, NY sounding | Figure 23: 00z Sterling, VA sounding | Figure 24: 00z Wallops Island, VA sounding |
Figure 1: National Preliminary Reports 12z 13 June 2019 to 12z 14 June 2019 | Figure 2: Prelim Reports vs. 1630z SPC Convective Outlook |
Figure 3: Zoomed Preliminary Reports for the same period. | Figure 4: Local storm reports (including flooding and non-severe reports) in the region. |
Figure 1: Plot of local storm reports and storm-based warnings for the 13 June 2019 event. Click here for more information. |
NWUS51 KPHI 151003 LSRPHI PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 603 AM EDT SAT JUN 15 2019 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0648 PM TSTM WND DMG 1 SW CONOWINGO 39.67N 76.17W 06/13/2019 CECIL MD DEPT OF HIGHWAYS WIND DAMAGE CLOSED U.S. HIGHWAY 1 NORTHBOUND AT STATE HIGHWAY 222. TIME ESTIMATED FROM RADAR. 0654 PM TSTM WND DMG PORT DEPOSIT 39.61N 76.10W 06/13/2019 CECIL MD TRAINED SPOTTER SEVERAL REPORTS OF TREES DOWN IN PORT DEPOSIT, INCLUDING ONE ACROSS CANAL ROAD, FORCING ITS CLOSURE. TIME ESTIMATED FROM RADAR. 0702 PM TORNADO 5 WSW HOLLYWOOD BEACH 39.48N 75.99W 06/13/2019 CECIL MD NWS STORM SURVEY A STORM SURVEY DETERMINED AN EF1 TORNADO SNAPPED OR UPROOTED HUNDREDS OF TREES IN ELK NECK STATE PARK. THE TORNADO LIFTED NEAR HOLLYWOOD BEACH. 0704 PM TSTM WND DMG 4 WSW HOLLYWOOD BEACH 39.48N 75.99W 06/13/2019 CECIL MD DEPT OF HIGHWAYS STATE HIGHWAY 272 CLOSED AT CAMPGROUND ROAD FROM WIND DAMAGE. TIME ESTIMATED FROM RADAR. 0714 PM TSTM WND DMG 2 WNW BRANTWOOD 39.57N 75.83W 06/13/2019 CECIL MD PUBLIC CORRECTS TIME OF PREVIOUS TSTM WND DMG REPORT FROM 2 WNW BRANTWOOD. DOWNED TREE AND WIRES WITH PEOPLE TRAPPED IN A HOME. NO INJURIES REPORTED. TIME ESTIMATED FROM RADAR. 0715 PM TSTM WND DMG 1 SE CAYOTS 39.48N 75.83W 06/13/2019 CECIL MD PUBLIC CORRECTS TIIME OF PREVIOUS TSTM WND DMG REPORT FROM 1 SE CAYOTS. NUMEROUS TREES DOWN. SEVERAL OUTBUILDINGS DAMAGED. ROOF AND WINDOW DAMAGE TO A HOUSE. TIME ESTIMATED FROM RADAR. 0715 PM TSTM WND DMG 2 W ELKTON 39.61N 75.86W 06/13/2019 CECIL MD DEPT OF HIGHWAYS WIND DAMAGE CLOSED U.S. HIGHWAY 40 WESTBOUND NEAR NOTTINGHAM ROAD. TIME ESTIMATED FROM RADAR. 0720 PM TSTM WND DMG 1 NNE CHESAPEAKE CITY 39.54N 75.81W 06/13/2019 CECIL MD DEPT OF HIGHWAYS SEVERAL REPORTS OF WIND DAMAGE NEAR STATE HIGHWAY 213 AND BIDDLE STREET. TIME ESTIMATED FROM RADAR. 0728 PM TSTM WND DMG 2 ESE MOUNT PLEASANT 39.50N 75.68W 06/13/2019 NEW CASTLE DE LAW ENFORCEMENT WIND GUSTS BLEW OVER A TRACTOR TRAILER NEAR THE INTERSECTION OF CEDAR LANE ROAD AND BOYDS CORNER ROAD. TIME ESTIMATED FROM RADAR. 0733 PM TSTM WND DMG 2 NNE MCDONOUGH 39.52N 75.63W 06/13/2019 NEW CASTLE DE PUBLIC DOWNED TREES AND PARTIAL ROOF DAMAGE NEAR THE INTERSECTION OF PORT PENN ROAD AND DUTCH NECK ROAD. TIME ESTIMATED FROM RADAR. 0740 PM TSTM WND DMG WILMINGTON MANOR 39.69N 75.59W 06/13/2019 NEW CASTLE DE BROADCAST MEDIA DOWNED TREEE DAMAGING A HOUSE. TIME ESTIMATED FROM RADAR. 0743 PM TSTM WND DMG 1 W SALEM 39.57N 75.49W 06/13/2019 SALEM NJ PUBLIC SEVERAL TREES DOWNED AND UPROOTED. TIME ESTIMATED FROM RADAR. 0746 PM TSTM WND DMG SALEM 39.58N 75.48W 06/13/2019 SALEM NJ PUBLIC DOWNED TREES AND PARTIAL ROOF DAMAGE NEAR THE INTERSECTION OF FRONT STREET AND BROADWAY. TIME ESTIMATED FROM RADAR. 0758 PM FLOOD CHEYNEY 39.93N 75.53W 06/13/2019 CHESTER PA TRAINED SPOTTER FLOODING ALONG DILWORTHTOWN RD BETWEEN WESTOWN RD. AND CREEK RD. FAST MOVING WATER SEEN OVER ROADWAY. 1.62 INCHES OF RAIN IN 45 MINUTES. 0800 PM TSTM WND DMG WOODSTOWN 39.65N 75.33W 06/13/2019 SALEM NJ PUBLIC MULTIPLE REPORTS OF TREES DOWN. TIME ESTIMATED FROM RADAR. 0807 PM TSTM WND DMG SOUTH HARRISON TWP 39.70N 75.27W 06/13/2019 GLOUCESTER NJ PUBLIC LARGE TREE DOWN AT A RESIDENCE NEAR THE INTERSECTION OF STATE HIGHWAY 45 AND COUNTY ROAD 694. TIME ESTIMATED FROM RADAR. 0815 PM TORNADO 1 ESE HARRISON TWP 39.75N 75.24W 06/13/2019 GLOUCESTER NJ NWS STORM SURVEY A STORM SURVEY DETERMINED AN EF0 TORNADO OCCURRED NEAR MULLICA HILL. CAUSING TREE DAMAGE, FENCING DAMAGE TO ONE RESIDENCE AND RIPPED A GUTTER OFF ANOTHER RESIDENCE. 0815 PM FLASH FLOOD 1 NNW CLEARVIEW MANOR 39.72N 75.57W 06/13/2019 NEW CASTLE DE PUBLIC SOCIAL MEDIA PHOTOS OF WATER OVER TWO FEET DEEP IN SEVERAL RESIDENTIAL AREAS IN THE OVERVIEW GARDENS AREA. TIME ESTIMATED FROM RADAR REPORTS AND SOCIAL MEDIA POSTS. 0816 PM TORNADO MULLICA HILL 39.74N 75.22W 06/13/2019 GLOUCESTER NJ PUBLIC VIDEO OF A FUNNEL IN MULLICA HILL WITH SMALL DEBRIS BEING LOFTED. TIME ESTIMATED FROM RADAR. 0830 PM TORNADO 2 W BLACKWOOD 39.80N 75.10W 06/13/2019 GLOUCESTER NJ NWS STORM SURVEY A TORNADO SKIPPED ALONG A 2.1 MILE PATH FROM DEPTFORD TOWNSHIP INTO THE BLACKWOOD SECTION OF GLOUCESTER TOWNSHIP, CAUSING SIGNIFICANT TREE DAMAGE AND COLLATERAL DAMAGE TO RESIDENCES. 0830 PM TSTM WND DMG 1 N FAIRVIEW 39.79N 75.11W 06/13/2019 GLOUCESTER NJ TRAINED SPOTTER DOWNED ROAD SIGN AND NUMEROUS TREE BRANCHES DOWN NEAR THE INTERSECTION OF STATE HIGHWAYS 55 AND 47. TIME ESTIMATED FROM RADAR. 0834 PM TSTM WND DMG BLACKWOOD 39.81N 75.06W 06/13/2019 CAMDEN NJ LAW ENFORCEMENT NUMEROUS TREES DOWN BETWEEN CHURCH STREET AND BLACK HORSE PIKE ALONG ERIAL ROAD. TIME ESTIMATED FROM RADAR. 0835 PM FLASH FLOOD PENNYPACK CREEK AT PHIL 40.05N 75.03W 06/13/2019 PHILADELPHIA PA OTHER FEDERAL THE GAUGE AT PENNYPACK CREEK IN PHILADELPHIA REACHED FLOOD STAGE. 0835 PM FLASH FLOOD FRANKFORD CREEK AT PHIL 40.02N 75.10W 06/13/2019 PHILADELPHIA PA OTHER FEDERAL THE GAUGE AT FRANKFORD CREEK IN PHILADELPHIA REACHED FLOOD STAGE. 0900 PM FLOOD 1 ESE MANTUA 39.96N 75.18W 06/13/2019 PHILADELPHIA PA DEPT OF HIGHWAYS FLOODING REPORTED ALONG I-76. 0901 PM FLOOD 1 WNW POINT BREEZE 39.94N 75.20W 06/13/2019 PHILADELPHIA PA DEPT OF HIGHWAYS REPORT OF FLOODING ON I-76. 0907 PM FLOOD 1 SW SHAWMONT 40.04N 75.25W 06/13/2019 MONTGOMERY PA DEPT OF HIGHWAYS FLOODING REPORTED ON I-76. 0946 PM COASTAL FLOOD WILMINGTON 39.74N 75.55W 06/13/2019 NEW CASTLE DE DEPT OF HIGHWAYS SOUTH MARKET STREET BRIDGE CLOSED FROM TIDAL FLOODING. 1015 PM FLASH FLOOD CHESTER CREEK NEAR CHES 39.87N 75.41W 06/13/2019 DELAWARE PA OTHER FEDERAL THE GAUGE AT CHESTER CREEK NEAR CHESTER REACHED FLOOD STAGE. 0203 AM COASTAL FLOOD BROOKLAWN 39.88N 75.12W 06/14/2019 CAMDEN NJ DEPT OF HIGHWAYS U.S. HIGHWAY 130 CLOSED NEAR COUNTY ROAD 551 FROM TIDAL FLOODING. && $$ CMS
NOUS41 KPHI 142039 PNSPHI DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054- 055-060>062-070-071-101>106-150845- Public Information Statement National Weather Service Mount Holly NJ 439 PM EDT Fri Jun 14 2019 ...NWS DAMAGE SURVEY FOR 06/13/2019 STRAIGHT LINE WIND AND TORNADO EVENT... .MULLICA HILL TORNADO... Start Location...Mullica Hill in Gloucester County, New Jersey End Location...Mullica Hill in Gloucester County, New Jersey Date...June 13, 2019 Estimated Time...8:15 PM EDT Maximum EF-Scale Rating...EF0 Estimated Maximum Wind Speed...60-70 mph Maximum Path Width...50 yards Path Length...0.3 miles Beginning Lat/Lon...39.7469/-75.2447 Ending Lat/Lon...39.7500/-75.2402 * Fatalities...0 * Injuries...0 ...Summary... A tornado formed in the development near Saddle Court in Mullica Hill. This caused damage to fencing at one residence, and ripped a gutter off another residence. Backyard furniture was lifted approximately 50 yards. From there, the tornado moved in a northeasterly direction and caused a narrow path of tree damage before lifting southwest of Highway 322. .DEPTFORD TOWNSHIP AND BLACKWOOD TORNADO... Start Location...Deptford Township in Gloucester County, New Jersey End Location...Blackwood section of Gloucester Township in Camden County, New Jersey Date...June 13, 2019 Estimated Time...8:30 to 8:35 PM EDT Maximum EF-Scale Rating...EF1 Estimated Maximum Wind Speed...90-100 mph Maximum Path Width...200 yards Path Length...2.1 miles (non-continuous) Beginning Lat/Lon...39.8011/-75.0983 Ending Lat/Lon...39.8064/-75.0599 * Fatalities...0 * Injuries...0 ...Summary... The tornado took a non-continuous path from Deptford Township into the Blackwood section of Gloucester Township. There were several locations of tree damage, including snapped and uprooted hardwood trees. There was damage to three residences in Deptford Township when portions of trees fell on these residences. In Blackwood, an uprooted tree caused damage to an apartment building. .Salem straight line winds... Location...Salem in Salem County, New Jersey Date...June 13, 2019 Estimated Time...7:42 PM EDT Estimated Maximum Wind Speed...60-80 mph Maximum Path Width...100 yards Path Length...1.3 miles Beginning Lat/Lon...39.5711/-75.4903 Ending Lat/Lon...39.5729/-75.4668 * Fatalities...0 * Injuries...0 ...Summary... Straight line winds caused tree damage in and in the vicinity of Salem. The winds also damaged a garage door and flipped a boat at a residence on Amwellbury Road. 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 events and publication in NWS Storm Data. $$ SJ/JM --- NOUS41 KPHI 142115 PNSPHI DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054- 055-060>062-070-071-101>106-150915- Public Information Statement National Weather Service Mount Holly NJ 515 PM EDT Fri Jun 14 2019 ...NWS DAMAGE SURVEY FOR 06/13/19 TORNADO EVENT... .Elk Neck State Park in Cecil County, MD Tornado... Start Location...Elk Neck State Park in Cecil County, MD End Location...Hollywood Beach in Cecil County, MD Date...June 13, 2019 Estimated Time...7:02 PM EDT to 7:10 PM EDT Maximum EF-Scale Rating...EF1 Estimated Maximum Wind Speed...100 mph Maximum Path Width...Approximately 580 yards or one third of a mile Path Length...7.5 miles Beginning Lat/Lon...39.4800/-75.9942 Ending Lat/Lon...39.4988/-75.9123 * Fatalities...0 * Injuries...0 ...Summary... A tornado touched down in Elk Neck State Park in southwestern Cecil County, MD around 7:02 PM on Thursday, June 13. It is possible this tornado formed offshore as a waterspout which then came onshore. Hundreds of trees were snapped or uprooted in Elk Neck State Park in a pattern consistent with tornadic winds. A few outbuildings also sustained minor damage. The tornado tracked east-northeastwards towards Hollywood Beach. Only minor damage was observed in this area, and the tornado is estimated to have lifted at 7:10 PM. No injuries were reported as a result of this tornado. 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. $$ JEO
Gloucester/Camden County Tornadoes and New Castle/Salem County Wind Damage
Figure 1: TPHL radar loop of base velocities during the two tornadoes that occurred in Gloucester Counties on the evening of 13 June 2019. The loop is valid from 2356 UTC on 13 June 2019 to 0100 UTC on 14 June 2019. Note the tightening of the rotation (red is outbound; green is inbound) as the broader circulation approaches Mullica Hill. This tighter circulation coincides with the EF0 tornado that developed here. The circulation weakens rather quickly after continuing northward. However, a second circulation rapidly tightens south of Woodbury and continues east-northeast into Camden County (west of Lindenwold). This second circulation is associated with the EF1 tornado that occurred in the Deptford and Blackwood areas. | Figure 2: Same as Fig. 1, valid from 2321 UTC on 13 June 2019 to 0010 UTC on 14 June 2019. In this phase of the event (i.e., before the New Jersey tornadoes), several reports of wind damage very closely correspond to stronger base velocities seen in this radar animation moving from the Bohemia Mills and Mount Pleasant areas eastward to Port Penn. The storm crosses Delaware Bay, entering Salem County near Salem (where several reports of tree and property damage were received) before moving northeastward to Woodstown, which also featured straight-line wind damage. As opposed to the animation in Fig. 1, there is much less evidence of tighter rotation during this phase of the storm and is consistent with storm surveys in Salem County and photos from New Castle County exhibiting characteristics of non-tornadic wind damage. Additional damage was reported in the Wilmington Manor area (south of Wilmington), collocated with stronger base velocities in this area around 2345 UTC. This cell exhibits broader cyclonic rotation after entering New Jersey. |
Cecil County Tornado
Figure 3: KDOX radar reflectivity factor animation of the tornadic storm that occurred in Cecil County on 13 June 2019. Animation is from 2256 UTC to 2310 UTC. This line segment featured two areas of damage reports, which are consistent with the portions of the line that begin bowing out toward the end of the animation . One bow is located near North East, and the other is located near Hollywood Beach. Several instances of wind damage occurred along and downstream of the path of these bows. However, a tornado also occurred in the Elk Neck State Park area. There is some indication of a notch in the line segment in this general vicinity (north of Betterton in Chesapeake Bay), which is a a commonly observed location where brief tornadoes occur in storms of this type. | Figure 4: Same as Fig. 3, using base velocities. A close analysis of the animation shows broader rotation beginning in Chesapeake Bay and continuing through southern Cecil County. Notably, however, is a tightening of the rotation observed just prior to landfall. The tornado likely began as a waterspout in Chesapeake Bay. The tighter rotation weakens rapidly after landfall, coinciding with apparent dissipation near Hollywood Beach. |