Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly

June 28, 2020Kent County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 28, 2020, 6:57 PM EDT for Kent County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 48 min. 12 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: Jun 28, 2020, 6:57 PM EDT (22:57 UTC)
Expired: Jun 28, 2020, 7:45 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Kent County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 22:56 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
Jun 28, 6:57 PM EDT	TSTM WND DMG	Crumpton, MD	DOWNED POWER LINES REPORTED IN THE AREA. TIME ESTIMATED FROM RADAR.
Jun 28, 6:57 PM EDT	TSTM WND DMG	Crumpton, MD	DOWNED POWER LINES REPORTED IN THE AREA. TIME ESTIMATED FROM RADAR.
Jun 28, 7:00 PM EDT	HAIL 0.25	1 Se Crumpton, MD	MPING REPORT. TIME ESTIMATED FROM RADAR.
Jun 28, 7:00 PM EDT	HAIL 0.25	1 Se Crumpton, MD	MPING REPORT. TIME ESTIMATED FROM RADAR.
Jun 28, 7:02 PM EDT	TSTM WND DMG	3 Sw Crumpton, MD	DOWNED POWER LINES IN THE AREA. TIME ESTIMATED FROM RADAR.
Jun 28, 7:02 PM EDT	TSTM WND DMG	3 Sw Crumpton, MD	DOWNED POWER LINES IN THE AREA. TIME ESTIMATED FROM RADAR.
Jun 28, 7:16 PM EDT	HAIL 0.25	2 W Sudlersville, MD	MPING REPORT.
Jun 28, 7:16 PM EDT	HAIL 0.25	2 W Sudlersville, MD	MPING REPORT.
Jun 28, 7:20 PM EDT	HAIL 0.5	2 W Sudlersville, MD	MPING REPORT.
Jun 28, 7:20 PM EDT	HAIL 0.5	2 W Sudlersville, MD	MPING REPORT.
Jun 28, 7:25 PM EDT	TSTM WND DMG	1 W Barclay, MD	MPING REPORT OF TREE LIMBS DOWN AND SHINGLES BLOWN OFF. TIME ESTIMATED FROM RADAR.
Jun 28, 7:25 PM EDT	TSTM WND DMG	1 W Barclay, MD	MPING REPORT OF TREE LIMBS DOWN AND SHINGLES BLOWN OFF. TIME ESTIMATED FROM RADAR.

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.0 hours before the alert went out and 122 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: 106 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1209 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

885 
WUUS51 KPHI 282257
SVRPHI
DEC001-MDC011-029-035-282345-
/O.NEW.KPHI.SV.W.0093.200628T2257Z-200628T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
657 PM EDT Sun Jun 28 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  West central Kent County in central Delaware...
  Queen Anne's County in northeastern Maryland...
  Northeastern Caroline County in eastern Maryland...
  Central Kent County in northeastern Maryland...

* Until 745 PM EDT.

* At 657 PM EDT, a severe thunderstorm was located over Morgnec, or
  13 miles north of Centerville, moving southeast at 15 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Centerville, Chestertown, Centreville, Church Hill, Millington,
  Sudlersville, Goldsboro, Hartly, Old Town, Langford, Hazlettville,
  Starkey Corner, Morgnec, Massey, Crumpton, Carville, Hope,
  Queenstown, Henderson and Marydel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3928 7618 3928 7601 3934 7586 3913 7556
      3900 7581 3899 7617 3900 7617 3901 7619
TIME...MOT...LOC 2257Z 317DEG 13KT 3923 7602 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

2 follow-up statements

833 
WWUS51 KPHI 282319
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
719 PM EDT Sun Jun 28 2020

MDC029-282329-
/O.CAN.KPHI.SV.W.0093.000000T0000Z-200628T2345Z/
Kent MD-
719 PM EDT Sun Jun 28 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL KENT COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3919 7604 3925 7586 3912 7559 3900 7581
      3899 7599
TIME...MOT...LOC 2319Z 314DEG 15KT 3914 7588 

$$

DEC001-MDC011-035-282345-
/O.CON.KPHI.SV.W.0093.000000T0000Z-200628T2345Z/
Kent DE-Queen Anne's MD-Caroline MD-
719 PM EDT Sun Jun 28 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR WEST CENTRAL KENT...NORTHEASTERN QUEEN ANNE'S AND NORTHEASTERN
CAROLINE COUNTIES...

At 719 PM EDT, a severe thunderstorm was located near Sudlersville,
or 11 miles northeast of Centerville, moving southeast at 15 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Church Hill, Sudlersville, Goldsboro, Hartly, Hazlettville, Starkey
Corner, Carville, Hope, Henderson, Marydel, Templeville and Barclay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

Frequent cloud to ground lightning is occurring with this storm. 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.

&&

LAT...LON 3919 7604 3925 7586 3912 7559 3900 7581
      3899 7599
TIME...MOT...LOC 2319Z 314DEG 15KT 3914 7588 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

098 
WWUS51 KPHI 282341
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
741 PM EDT Sun Jun 28 2020

DEC001-MDC011-035-282351-
/O.EXP.KPHI.SV.W.0093.000000T0000Z-200628T2345Z/
Kent DE-Queen Anne's MD-Caroline MD-
741 PM EDT Sun Jun 28 2020

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL KENT...
NORTHEASTERN QUEEN ANNE'S AND NORTHEASTERN CAROLINE COUNTIES WILL
EXPIRE AT 745 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3919 7604 3925 7586 3912 7559 3900 7581
      3899 7599
TIME...MOT...LOC 2341Z 317DEG 13KT 3909 7581 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 5:37 PM EDT	Special Weather Statement	PHI	New Castle	38 min
Jun 28, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	34 min
Jun 28, 7:40 PM EDT	Special Weather Statement	PHI	Kent	35 min
Jun 28, 6:16 PM EDT	Special Weather Statement	PHI	Kent	44 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2020 Severe Thunderstorm Warnings in Delaware, 2020 Every severe thunderstorm warning in 2020

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.