Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly

June 27, 2020Cecil County, Kent County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 27, 2020, 4:59 PM EDT for Cecil County, Kent County, Maryland. It was in force for 31 min. 2 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 27, 2020, 4:59 PM EDT (20:59 UTC)
Expired: Jun 27, 2020, 5:30 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Cecil County, MD, Kent County, MD

The radar

The Dover AFB radar (KDOX), 81 km from the middle of the area, began a volume at 21:02 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 27, 5:05 PM EDT	TSTM WND DMG	1 Sw Betterton, MD	DEBRIS ON MD ROUTE 292 AT HOWELL POINT ROAD. TIME ESTIMATED FROM RADAR.
Jun 27, 5:05 PM EDT	TSTM WND DMG	Betterton, MD	TREES DOWN IN BETTERTON. 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, 9.0 hours before the alert went out and 124 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: 2 J/kg
Mixed-layer CIN: -198 J/kg
Mixed-layer LCL: 1545 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

981 
WUUS51 KPHI 272059
SVRPHI
MDC015-029-272130-
/O.NEW.KPHI.SV.W.0078.200627T2059Z-200627T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
459 PM EDT Sat Jun 27 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Kent County in northeastern Maryland...
  Southeastern Cecil County in northeastern Maryland...

* Until 530 PM EDT.

* At 459 PM EDT, a severe thunderstorm was located over Betterton, or
  7 miles south of Aberdeen Proving Ground, moving east at 40 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Cecilton, Betterton, Warwick, Newtown, Sassafras, Cayots, Bohemias
  Mills, Kennedyville, Chesapeake City and Galena.

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 3934 7616 3933 7614 3937 7611 3937 7606
      3942 7600 3946 7601 3948 7600 3953 7578
      3933 7576 3925 7618 3928 7619 3929 7617
      3932 7618
TIME...MOT...LOC 2059Z 259DEG 33KT 3936 7610 

HAIL...1.25IN
WIND...60MPH
 
$$

JEO

2 follow-up statements

204 
WWUS51 KPHI 272112
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
512 PM EDT Sat Jun 27 2020

MDC015-029-272130-
/O.CON.KPHI.SV.W.0078.000000T0000Z-200627T2130Z/
Kent MD-Cecil MD-
512 PM EDT Sat Jun 27 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHEASTERN KENT AND SOUTHEASTERN CECIL COUNTIES...

At 511 PM EDT, a severe thunderstorm was located near Cecilton, or 11
miles southeast of Aberdeen Proving Ground, moving east at 40 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Cecilton, Warwick, Sassafras, Bohemias Mills, Kennedyville and
Galena.

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 3934 7607 3937 7606 3942 7600 3943 7598
      3949 7578 3933 7576 3927 7607
TIME...MOT...LOC 2111Z 259DEG 33KT 3938 7595 

HAIL...1.25IN
WIND...60MPH
 
$$

JEO

715 
WWUS51 KPHI 272126
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
526 PM EDT Sat Jun 27 2020

MDC015-029-272135-
/O.EXP.KPHI.SV.W.0078.000000T0000Z-200627T2130Z/
Kent MD-Cecil MD-
526 PM EDT Sat Jun 27 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KENT AND
SOUTHEASTERN CECIL COUNTIES WILL EXPIRE AT 530 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

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 3934 7607 3937 7606 3942 7600 3943 7598
      3949 7578 3933 7576 3927 7607
TIME...MOT...LOC 2125Z 259DEG 33KT 3940 7579 

$$

JEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 4:56 PM EDT	Special Weather Statement	PHI	Cecil	34 min
Jun 27, 5:32 PM EDT	Special Weather Statement	PHI	Kent	28 min
Jun 27, 5:37 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	23 min
Jun 27, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	35 min

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.