Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly

April 13, 20204 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 13, 2020, 2:50 PM EDT for 4 counties in Maryland. It was in force for 55 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 13, 2020, 2:50 PM EDT (18:50 UTC)
Expired: Apr 13, 2020, 3:45 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

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

The radar

The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 18:50 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 13, 3:06 PM EDT	TSTM WND GST 58	Rock Hall, MD
Apr 13, 3:19 PM EDT	TSTM WND DMG	1 Nne Church Hill, MD	DELAYED REPORT. DOWNED TREE LIMBS AND WIRES NEAR THE INTERSECTION OF STATE HIGHWAY 300 AND STATE HIGHWAY 19. TIME ESTIMATED FROM RADAR.
Apr 13, 3:20 PM EDT	TSTM WND DMG	2 Nne Hope, MD	SEVERAL SOCIAL MEDIA REPORTS OF DOWNED TREES NEAR WILLOW BRANCH ROAD. TIME ESTIMATED FROM RADAR.
Apr 13, 3:27 PM EDT	TORNADO	Henderson, MD	A WEAK EF-0 TORNADO TOUCHED DOWN JUST NORTH OF BALTIMORE CORNER IN CAROLINE COUNTY MD AT APPROXIMATELY 327 PM ON APRIL 13TH, THEN MOVED IN AN EAST TO NORTHEAST DIRECTION FOR ABOUT 4.9 MILES BEFORE LIFTING JUST SOUTH OF HENDERSON MD. NO INJURIES WERE REPORTED,
Apr 13, 3:30 PM EDT	TSTM WND GST 60	3 Sse Ingleside, MD	METAL SHED BLOWN APART; SIGNIFICANT TREE DAMAGE.

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 13, 11:33 AM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.8 hours before the alert went out and 103 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 487 m²/s²
0-3 km storm-relative helicity: 684 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

312 
WUUS51 KPHI 131850
SVRPHI
MDC011-029-035-041-131945-
/O.NEW.KPHI.SV.W.0032.200413T1850Z-200413T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
250 PM EDT Mon Apr 13 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Talbot County in eastern Maryland...
  Queen Anne's County in northeastern Maryland...
  Caroline County in eastern Maryland...
  Kent County in northeastern Maryland...

* Until 345 PM EDT.

* At 249 PM EDT, severe thunderstorms were located along a line
  extending from near Bel Air South to Lake Shore to Annapolis,
  moving east at 45 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
  Romancoke, Federalsburg, Greensboro, Oakland, Ridgely, Rock Hall,
  Trappe, St. Michaels, Church Hill, Preston, Oxford, Millington,
  Sudlersville and Betterton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for southern
Delaware...and eastern and northeastern Maryland.

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

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.

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

&&

LAT...LON 3892 7637 3904 7631 3898 7628 3900 7617
      3915 7628 3932 7618 3938 7606 3938 7577
      3867 7571 3867 7620 3878 7629 3867 7634
      3875 7637 3885 7627 3879 7619 3883 7619
      3897 7625 3884 7637
TIME...MOT...LOC 1849Z 259DEG 41KT 3945 7633 3912 7649 3895 7651 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

CMS

3 follow-up statements

461 
WWUS51 KPHI 131909
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
309 PM EDT Mon Apr 13 2020

MDC011-029-035-041-131945-
/O.CON.KPHI.SV.W.0032.000000T0000Z-200413T1945Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
309 PM EDT Mon Apr 13 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR TALBOT...QUEEN ANNE'S...CAROLINE AND KENT COUNTIES...

At 307 PM EDT, severe thunderstorms were located along a line
extending from near Hollywood Beach to near Old Town to near
Romancoke, moving east at 55 mph.

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

SOURCE...Radar and surface observations. A 70 mph gust was reported 
         on the Bay Bridge at 303 pm.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
Romancoke, Federalsburg, Greensboro, Oakland, Ridgely, Rock Hall,
Trappe, St. Michaels, Church Hill, Preston, Oxford, Millington,
Sudlersville and Betterton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for southern
Delaware...and eastern and northeastern Maryland.

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

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.

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

&&

LAT...LON 3892 7637 3904 7631 3899 7628 3898 7628
      3897 7627 3900 7617 3915 7628 3932 7618
      3938 7606 3938 7577 3867 7571 3867 7620
      3878 7629 3867 7634 3875 7637 3885 7627
      3879 7619 3883 7619 3897 7625 3884 7637
TIME...MOT...LOC 1907Z 258DEG 48KT 3949 7595 3909 7613 3892 7640 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

CMS

359 
WWUS51 KPHI 131933
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
333 PM EDT Mon Apr 13 2020

MDC011-029-035-041-131945-
/O.CON.KPHI.SV.W.0032.000000T0000Z-200413T1945Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
333 PM EDT Mon Apr 13 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR TALBOT...CENTRAL QUEEN ANNE'S...CAROLINE AND EAST CENTRAL KENT
COUNTIES...

At 332 PM EDT, severe thunderstorms were located along a line
extending from Port Penn to near Goldsboro to near Skipton, moving
east at 50 mph.

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

SOURCE...Radar and surface observations. Several reports of 60 to 70 
         mph wind gusts have been received.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Easton, Centerville, Talbot, Denton, Centreville, Romancoke,
Federalsburg, Greensboro, Oakland, Ridgely, Trappe, St. Michaels,
Preston, Oxford, Sudlersville, Goldsboro, Queen Anne, Smithville,
Grasonville and Starr.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for southern
Delaware...and eastern and northeastern Maryland.

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

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.

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

&&

LAT...LON 3892 7637 3904 7631 3899 7628 3898 7628
      3897 7627 3900 7617 3911 7590 3938 7577
      3867 7571 3867 7620 3878 7629 3867 7634
      3875 7637 3885 7627 3879 7619 3883 7619
      3897 7625 3884 7637
TIME...MOT...LOC 1932Z 271DEG 44KT 3949 7557 3909 7575 3892 7602 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

CMS

715 
WWUS51 KPHI 131942
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
342 PM EDT Mon Apr 13 2020

MDC011-029-035-041-131952-
/O.EXP.KPHI.SV.W.0032.000000T0000Z-200413T1945Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
342 PM EDT Mon Apr 13 2020

...THE SEVERE THUNDERSTORM WARNING FOR TALBOT...CENTRAL QUEEN
ANNE'S...CAROLINE AND EAST CENTRAL KENT COUNTIES WILL EXPIRE AT 345
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 are still possible with these thunderstorms.

A Tornado Watch remains in effect until 600 PM EDT for southern
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.

LAT...LON 3892 7637 3904 7631 3899 7628 3898 7628
      3897 7627 3900 7617 3911 7590 3938 7577
      3867 7571 3867 7620 3878 7629 3867 7634
      3875 7637 3885 7627 3879 7619 3883 7619
      3897 7625 3884 7637
TIME...MOT...LOC 1941Z 259DEG 41KT 3949 7557 3909 7575 3892 7602 

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 4:28 AM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	32 min
Apr 13, 4:45 AM EDT	Special Weather Statement	PHI	Caroline, Talbot	30 min
Apr 13, 5:12 AM EDT	Special Weather Statement	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	33 min
Apr 13, 5:41 AM EDT	Special Weather Statement	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	34 min
Apr 13, 6:11 AM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	4 hr
Apr 13, 6:17 AM EDT	Special Weather Statement	PHI	Queen Anne's	28 min
Apr 13, 6:42 AM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	4 hr
Apr 13, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	64 min
Apr 13, 3:26 PM EDT	Tornado Warning	PHI	Caroline, Queen Anne's	13 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.