Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 66, NWS Philadelphia/Mount Holly

June 4, 2020Cecil County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2020, 9:30 PM EDT for Cecil County, Kent County, Queen Anne's County, Maryland. It was in force for 28 min. 1 report 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 4, 2020, 9:30 PM EDT (01:30 UTC)
Expired: Jun 4, 2020, 9:58 PM EDT
In force: 28 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Cecil County, MD, Kent County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 01:30 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 4, 9:40 PM EDT	TSTM WND DMG	2 Nnw Morgnec, MD	TREE DOWN AT THE INTERSECTION OF PEKINS HILL RD AND WALLIS RD. 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 1.5 hours before the alert went out and 154 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: 1848 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1057 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted.

256 
WUUS51 KPHI 050130
SVRPHI
MDC015-029-035-050215-
/O.NEW.KPHI.SV.W.0066.200605T0130Z-200605T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
930 PM EDT Thu Jun 4 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Queen Anne's County in northeastern Maryland...
  Kent County in northeastern Maryland...
  Southern Cecil County in northeastern Maryland...

* Until 1015 PM EDT.

* At 930 PM EDT, a severe thunderstorm was located over Rock Hall, or
  11 miles northwest of Centerville, moving northeast at 40 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...
  Chestertown, Rock Hall, Church Hill, Millington, Sudlersville, Old
  Town, Langford, Starkey Corner, Morgnec, Massey, Crumpton,
  Kennedyville, Galena and Kingstown.

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 3921 7625 3925 7623 3940 7585 3920 7576
      3904 7624 3909 7623 3913 7625 3915 7628
      3917 7628
TIME...MOT...LOC 0130Z 247DEG 37KT 3916 7620 

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

MPS

2 follow-up statements

399 
WWUS51 KPHI 050150
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
950 PM EDT Thu Jun 4 2020

MDC015-029-035-050215-
/O.CON.KPHI.SV.W.0066.000000T0000Z-200605T0215Z/
Queen Anne's MD-Kent MD-Cecil MD-
950 PM EDT Thu Jun 4 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN KENT AND SOUTHERN CECIL
COUNTIES...

At 949 PM EDT, a severe thunderstorm was located over Crumpton, or 14
miles north of Centerville, moving east at 40 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...
Church Hill, Millington, Sudlersville, Morgnec, Massey, Crumpton,
Kennedyville, Galena and Kingstown.

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.

&&

LAT...LON 3913 7604 3931 7606 3934 7600 3940 7585
      3920 7576 3913 7597
TIME...MOT...LOC 0149Z 264DEG 33KT 3923 7596 

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

MPS

154 
WWUS51 KPHI 050158
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
958 PM EDT Thu Jun 4 2020

MDC015-029-035-050208-
/O.CAN.KPHI.SV.W.0066.000000T0000Z-200605T0215Z/
Queen Anne's MD-Kent MD-Cecil MD-
958 PM EDT Thu Jun 4 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S...
NORTHEASTERN KENT AND SOUTHERN CECIL COUNTIES IS CANCELLED...
                
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 has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

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

LAT...LON 3913 7604 3931 7606 3934 7600 3940 7585
      3920 7576 3913 7597
TIME...MOT...LOC 0157Z 247DEG 37KT 3927 7584 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 9:15 PM EDT	Special Weather Statement	PHI	Cecil, Kent, Queen Anne's, Talbot	45 min
Jun 4, 9:54 PM EDT	Special Weather Statement	PHI	Caroline, Cecil, Talbot	36 min
Jun 4, 10:12 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	33 min
Jun 5, 9:47 AM EDT	Flash Flood Watch	PHI	Cecil, Kent	12 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 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.