Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 336, NWS Philadelphia/Mount Holly

August 7, 20195 counties in Maryland; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2019, 4:57 PM EDT for 5 counties in Maryland; Kent County, New Castle County, Delaware. It was in force for 63 min. 8 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: Aug 7, 2019, 4:57 PM EDT (20:57 UTC)
Expired: Aug 7, 2019, 6:00 PM EDT
In force: 63 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.88 in
Wind: 60.0 mph

Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 20:58 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
Aug 7, 5:00 PM EDT	TSTM WND DMG	Chestertown, MD	SEVERAL REPORTS OF WIRES BLOWN DOWN AND NUMEROUS POWER OUTAGES AROUND CHESTERTOWN. TIME ESTIMATED FROM RADAR.
Aug 7, 5:00 PM EDT	TSTM WND GST 51	2 E Chester, MD	SITE MD040 ON THE KENT NARROW BRIDGE.
Aug 7, 5:15 PM EDT	TSTM WND DMG	2 Ene Queenstown, MD	TREE DOWN ACROSS THE ROADWAY AT THE INTERSECTION OF CHERRY LN AND MD-301. TIME ESTIMATED FROM RADAR.
Aug 7, 5:15 PM EDT	TSTM WND DMG	2 Ene Queenstown, MD	TREE DOWN ACROSS THE ROADWAY AT THE INTERSECTION OF CHERRY LN AND MD-301. TIME ESTIMATED FROM RADAR.
Aug 7, 5:16 PM EDT	TSTM WND DMG	1 E Queenstown, MD	TREE DOWN IN ROADWAY AT THE INTERSECTION OF MD-301 AND 4-H PARK RD. TIME ESTIMATED FROM RADAR.
Aug 7, 5:23 PM EDT	TSTM WND DMG	Carville, MD	DOWNED TREE ON ROUTE 305 IN CARVILLE. TIME ESTIMATED FROM RADAR.
Aug 7, 5:33 PM EDT	TSTM WND DMG	1 W Templeville, MD	TREE DOWN ON MD-302 AT WOODYARD RD. TIME ESTIMATED FROM RADAR.
Aug 7, 5:42 PM EDT	TSTM WND DMG	3 N Easton, MD	TWO TREES WERE DOWNED. TIME ESTIMATED FROM RADAR.

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
Aug 7, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.0 hours before the alert went out and 106 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: 371 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

486 
WUUS51 KPHI 072057
SVRPHI
DEC001-003-MDC011-015-029-035-041-072200-
/O.NEW.KPHI.SV.W.0336.190807T2057Z-190807T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
457 PM EDT Wed Aug 7 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern New Castle County in northern Delaware...
  Northwestern Kent County in central Delaware...
  Talbot County in eastern Maryland...
  Queen Anne's County in northeastern Maryland...
  Northern Caroline County in eastern Maryland...
  Kent County in northeastern Maryland...
  Southeastern Cecil County in northeastern Maryland...

* Until 600 PM EDT.

* At 456 PM EDT, severe thunderstorms were located along a line
  extending from near Perryman to near Overton to near Deale, moving
  east at 25 mph.

  HAZARD...60 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Middletown, Easton, Centerville, Talbot, Chestertown, Centreville,
  Greensboro, Oakland, Ridgely, Rock Hall, Trappe, St. Michaels,
  Church Hill, Cecilton, Millington, Sudlersville, Betterton,
  Goldsboro, Queen Anne and Hartly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 3896 7631 3884 7637 3892 7637 3904 7631
      3898 7628 3899 7620 3900 7617 3901 7622
      3917 7628 3932 7618 3942 7600 3952 7598
      3954 7560 3904 7575 3862 7608 3876 7622
      3871 7628 3877 7632 3867 7634
TIME...MOT...LOC 2056Z 273DEG 23KT 3943 7618 3907 7629 3875 7654 

TORNADO...POSSIBLE
HAIL...0.88IN
WIND...60MPH
 
$$

MPS

3 follow-up statements

403 
WWUS51 KPHI 072126
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
526 PM EDT Wed Aug 7 2019

DEC001-003-MDC011-015-029-035-041-072200-
/O.CON.KPHI.SV.W.0336.000000T0000Z-190807T2200Z/
New Castle DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
Cecil MD-
526 PM EDT Wed Aug 7 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHWESTERN NEW CASTLE...NORTHWESTERN KENT...TALBOT...QUEEN
ANNE'S...NORTHERN CAROLINE...NORTHEASTERN KENT AND SOUTHEASTERN CECIL
COUNTIES...

At 526 PM EDT, severe thunderstorms were located along a line
extending from near Cecilton to near Hope to near Grasonville to
Tilghman Island, moving east at 35 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Middletown, Easton, Centerville, Talbot, Centreville, Greensboro,
Oakland, Ridgely, Trappe, St. Michaels, Church Hill, Cecilton,
Millington, Sudlersville, Goldsboro, Queen Anne, Hartly, Starr,
Copperville and Bohemias Mills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 3863 7607 3863 7609 3876 7622 3871 7628
      3877 7632 3867 7634 3868 7634 3886 7632
      3892 7626 3908 7605 3941 7603 3942 7600
      3949 7599 3950 7561 3904 7575
TIME...MOT...LOC 2126Z 275DEG 32KT 3942 7595 3908 7595 3892 7619 3876
7636

HAIL...0.88IN
WIND...60MPH
 
$$

MPS

864 
WWUS51 KPHI 072142
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
542 PM EDT Wed Aug 7 2019

DEC001-003-MDC011-015-029-035-041-072200-
/O.CON.KPHI.SV.W.0336.000000T0000Z-190807T2200Z/
New Castle DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
Cecil MD-
542 PM EDT Wed Aug 7 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHWESTERN NEW CASTLE...NORTHWESTERN KENT...TALBOT...EASTERN
QUEEN ANNE'S...NORTHERN CAROLINE...NORTHEASTERN KENT AND SOUTHEASTERN
CECIL COUNTIES...

At 542 PM EDT, severe thunderstorms were located along a line
extending from Cecilton to near Goldsboro to Wye Mills to near St.
Michaels, moving east at 30 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Middletown, Easton, Greensboro, Oakland, Ridgely, Trappe, St.
Michaels, Millington, Sudlersville, Goldsboro, Queen Anne, Hartly,
Warwick, Starr, Copperville, Bohemias Mills, Jumptown, Delaney
Corner, Sassafras and Tanyard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 3875 7633 3873 7632 3873 7630 3877 7630
      3882 7625 3878 7621 3879 7619 3886 7620
      3908 7589 3949 7585 3950 7561 3904 7575
      3864 7606 3863 7609 3876 7622 3871 7628
      3872 7633
TIME...MOT...LOC 2142Z 280DEG 25KT 3942 7584 3908 7584 3892 7608 3876
7625

HAIL...0.75IN
WIND...60MPH
 
$$

MPS

975 
WWUS51 KPHI 072154
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
554 PM EDT Wed Aug 7 2019

DEC001-003-MDC011-015-029-035-041-072203-
/O.EXP.KPHI.SV.W.0336.000000T0000Z-190807T2200Z/
New Castle DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
Cecil MD-
554 PM EDT Wed Aug 7 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE...
NORTHWESTERN KENT...TALBOT...EASTERN QUEEN ANNE'S...NORTHERN
CAROLINE...NORTHEASTERN KENT AND SOUTHEASTERN CECIL COUNTIES WILL
EXPIRE AT 600 PM 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 severe thunderstorm watch remains in effect until 900 PM EDT for
central and northern Delaware...and eastern and northeastern
Maryland.

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

New Severe Thunderstorm Warnings are in effect.

LAT...LON 3875 7633 3873 7632 3873 7630 3877 7630
      3882 7625 3878 7621 3879 7619 3886 7620
      3908 7589 3949 7585 3950 7561 3904 7575
      3864 7606 3863 7609 3876 7622 3871 7628
      3872 7633
TIME...MOT...LOC 2153Z 273DEG 23KT 3942 7575 3908 7575 3892 7599 3876
7616

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 10:29 PM EDT	Special Weather Statement	PHI	Talbot	46 min
Aug 7, 4:07 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	53 min
Aug 7, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	42 min
Aug 7, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	52 min
Aug 7, 6:39 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	51 min
Aug 7, 10:02 AM EDT	Flash Flood Watch	PHI	New Castle	11 hr
Aug 7, 1:46 PM EDT	Special Weather Statement	PHI	Sussex	29 min
Aug 7, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	41 min
Aug 7, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	63 min
Aug 7, 4:44 PM EDT	Special Weather Statement	PHI	New Castle	31 min
Aug 7, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	59 min
Aug 7, 6:01 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Aug 7, 7:23 PM EDT	Special Weather Statement	PHI	Sussex	37 min
Aug 7, 7:54 PM EDT	Special Weather Statement	PHI	Sussex	36 min

Nearby

Severe Thunderstorm Warnings in Maryland, 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.