Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 11, NWS Philadelphia/Mount Holly

April 15, 2019Kent County, New Castle County, Sussex County, Delaware; 4 counties in New Jersey; 5 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 15, 2019, 3:07 AM EDT for Kent County, New Castle County, Sussex County, Delaware; 4 counties in New Jersey; 5 counties in Maryland. It was in force for 38 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 15, 2019, 3:07 AM EDT (07:07 UTC)
Expired: Apr 15, 2019, 3:45 AM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 27 km from the middle of the area, began a volume at 07:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 15, 3:12 AM EDT	TSTM WND DMG	Marydel, DE	TREES BLOWN DOWN IN MARYDEL. TIME ESTIMATED FROM RADAR.
Apr 15, 3:20 AM EDT	TSTM WND DMG	Port Penn, DE	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM PORT PENN. THE INTERSECTION OF W MARKET ST. AND DELAWARE CITY PORT PENN RD IS CLOSED DUE TO A UTILITY POLE AND TREE IN THE ROADWAY. TIME ESTIMATED FROM RADAR.
Apr 15, 3:20 AM EDT	TSTM WND DMG	Port Penn, DE	THE INTERSECTION OF W MARKET ST. AND DELAWARE CITY PORT PENN RD IS CLOSED DUE TO A UTILITY POLE AND TREE IN THE ROADWAY. TIME ESTIMATED FROM RADAR.
Apr 15, 3:20 AM EDT	TSTM WND GST 56	Port Penn, DE
Apr 15, 3:25 AM EDT	TSTM WND GST 64	Logan Twp., NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 15, 1:05 AM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.1 hours before the alert went out and 123 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 124 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 806 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

729 
WUUS51 KPHI 150707
SVRPHI
DEC001-003-005-MDC011-015-029-035-041-NJC007-011-015-033-150745-
/O.NEW.KPHI.SV.W.0011.190415T0707Z-190415T0745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
307 AM EDT MON APR 15 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Sussex County in southern Delaware...
  New Castle County in northern Delaware...
  Kent County in central Delaware...
  Eastern Talbot County in eastern Maryland...
  Eastern Queen Anne's County in northeastern Maryland...
  Caroline County in eastern Maryland...
  Northeastern Kent County in northeastern Maryland...
  Eastern Cecil County in northeastern Maryland...
  Western Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Northwestern Camden County in southern New Jersey...
  Central Gloucester County in southern New Jersey...

* Until 345 AM EDT.

* At 306 AM EDT, severe thunderstorms were located along a line
  extending from Elkton to Sudlersville to near Windyhill, moving
  northeast at 60 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Wilmington, Dover, Newark, Bridgeton, Middletown, Elkton, Deptford,
  West Deptford, Glassboro, Pennsville, Bellmawr, Woodbury, Smyrna,
  Milford, Pitman, Carneys Point, Elsmere, Paulsboro, New Castle and
  Penns Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 700 AM EDT for central,
northern and southern Delaware...eastern and northeastern Maryland...
southern New Jersey...and southeastern Pennsylvania.

LAT...LON 3861 7608 3914 7593 3970 7588 3988 7507
      3918 7519 3939 7549 3927 7537 3905 7537
      3890 7526 3881 7528 3868 7580 3871 7584
      3870 7590 3864 7597
TIME...MOT...LOC 0706Z 238DEG 54KT 3961 7579 3917 7587 3872 7601 

HAIL...<.75IN
WIND...60MPH
 
$$

MPS

2 follow-up statements

951 
WWUS51 KPHI 150730
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
330 AM EDT MON APR 15 2019

MDC015-029-035-041-150739-
/O.CAN.KPHI.SV.W.0011.000000T0000Z-190415T0745Z/
Talbot MD-Queen Anne's MD-Kent MD-Cecil MD-
330 AM EDT MON APR 15 2019

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TALBOT...EASTERN QUEEN
ANNE'S...NORTHEASTERN KENT AND EASTERN CECIL COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 700 AM EDT for central,
northern and southern Delaware...eastern Maryland...southern New
Jersey...and southeastern Pennsylvania.

LAT...LON 3871 7584 3978 7553 3988 7507 3918 7519
      3939 7549 3927 7537 3905 7537 3890 7526
      3881 7528 3868 7580
TIME...MOT...LOC 0729Z 238DEG 54KT 3979 7542 3935 7551 3890 7565 

$$

DEC001-003-005-MDC011-NJC007-011-015-033-150745-
/O.CON.KPHI.SV.W.0011.000000T0000Z-190415T0745Z/
Sussex DE-New Castle DE-Kent DE-Caroline MD-Cumberland NJ-Salem NJ-
Camden NJ-Gloucester NJ-
330 AM EDT MON APR 15 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM EDT
FOR NORTHWESTERN SUSSEX...EASTERN NEW CASTLE...KENT...SOUTHEASTERN
CAROLINE...WESTERN CUMBERLAND...SALEM...NORTHWESTERN CAMDEN AND
CENTRAL GLOUCESTER COUNTIES...

At 329 AM EDT, severe thunderstorms were located along a line
extending from near Arden to Woodland Beach to near Andrewsville,
moving northeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Wilmington, Dover, Bridgeton, Deptford, West Deptford, Glassboro,
Pennsville, Bellmawr, Woodbury, Smyrna, Milford, Pitman, Carneys
Point, Paulsboro, New Castle, Penns Grove, Salem, Westville,
Harrington and Woodstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 700 AM EDT for central,
northern and southern Delaware...eastern Maryland...southern New
Jersey...and southeastern Pennsylvania.

LAT...LON 3871 7584 3978 7553 3988 7507 3918 7519
      3939 7549 3927 7537 3905 7537 3890 7526
      3881 7528 3868 7580
TIME...MOT...LOC 0729Z 238DEG 54KT 3979 7542 3935 7551 3890 7565 

HAIL...<.75IN
WIND...60MPH
 
$$

MPS

258 
WWUS51 KPHI 150738
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
338 AM EDT MON APR 15 2019

DEC001-003-005-MDC011-NJC007-011-015-033-150748-
/O.EXP.KPHI.SV.W.0011.000000T0000Z-190415T0745Z/
Sussex DE-New Castle DE-Kent DE-Caroline MD-Cumberland NJ-Salem NJ-
Camden NJ-Gloucester NJ-
338 AM EDT MON APR 15 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX...EASTERN
NEW CASTLE...KENT...SOUTHEASTERN CAROLINE...WESTERN CUMBERLAND...
SALEM...NORTHWESTERN CAMDEN AND CENTRAL GLOUCESTER COUNTIES WILL
EXPIRE AT 345 AM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A tornado watch remains in effect until 700 AM EDT for central,
northern and southern Delaware...eastern Maryland...southern New
Jersey...and southeastern Pennsylvania.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
in Mount Holly NJ.

LAT...LON 3871 7584 3978 7553 3988 7507 3918 7519
      3939 7549 3927 7537 3905 7537 3890 7526
      3881 7528 3868 7580
TIME...MOT...LOC 0738Z 238DEG 54KT 3985 7529 3941 7538 3896 7552 

$$

MPS

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 15, 2:46 AM EDT	Severe Thunderstorm Warning	PHI	New Castle	44 min
Apr 15, 3:19 AM EDT	Tornado Warning	PHI	New Castle	26 min
Apr 15, 3:19 AM EDT	Wind Advisory	PHI	Kent, New Castle, Sussex	18 hr
Apr 15, 3:21 AM EDT	Tornado Warning	PHI	Kent	24 min
Apr 15, 3:28 AM EDT	Severe Thunderstorm Warning	PHI	Sussex	47 min
Apr 15, 3:31 AM EDT	Tornado Warning	PHI	Sussex	29 min
Apr 15, 3:36 AM EDT	Tornado Warning	PHI	Kent, Sussex	24 min
Apr 15, 3:41 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	64 min
Apr 15, 3:59 AM EDT	Areal Flood Advisory	PHI	Kent, Sussex	4 hr
Apr 15, 4:19 AM EDT	Special Weather Statement	PHI	Sussex	26 min
Apr 15, 12:31 AM EDT	Marine Dense Fog Advisory	PHI		5 hr
Apr 15, 2:34 AM EDT	Special Weather Statement	PHI	Warren	41 min
Apr 15, 2:47 AM EDT	Special Marine Warning	PHI		58 min
Apr 15, 3:00 AM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Apr 15, 3:03 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	20 min
Apr 15, 3:08 AM EDT	Special Marine Warning	PHI		67 min
Apr 15, 3:11 AM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Sussex, Warren	49 min
Apr 15, 3:27 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Morris, Somerset	32 min
Apr 15, 3:39 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more	37 min
Apr 15, 3:42 AM EDT	Special Marine Warning	PHI		63 min
Apr 15, 3:57 AM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	13 min
Apr 15, 4:16 AM EDT	Special Marine Warning	PHI		59 min
Apr 15, 4:40 AM EDT	Special Marine Warning	PHI		65 min
Apr 15, 4:47 AM EDT	Special Weather Statement	PHI	Atlantic	28 min
Apr 15, 5:07 AM EDT	Special Marine Warning	PHI		53 min
Apr 15, 5:30 AM EDT	Coastal Flood Statement	PHI	Ocean	7 hr
Apr 15, 6:59 AM EDT	Areal Flood Warning	PHI	Hunterdon	4 hr
Apr 15, 2:15 AM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	45 min
Apr 15, 2:25 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	50 min
Apr 15, 2:43 AM EDT	Tornado Warning	PHI	Caroline, Kent, Queen Anne's	32 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2019 Severe Thunderstorm Warnings in New Jersey, 2019 Severe Thunderstorm Warnings in Delaware, 2019 Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.