Alert archive / Maryland / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Philadelphia/Mount Holly

June 14, 20214 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2021, 11:03 PM EDT for 4 counties in Maryland. It was in force for 57 min. 4 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 14, 2021, 11:03 PM EDT (03:03 UTC)
Expired: Jun 15, 2021, 12:00 AM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 03:03 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 14, 11:35 PM EDT	MARINE TSTM WIND 41	14 E Bay Ridge, MD	GRASONVILLE
Jun 14, 11:49 PM EDT	MARINE TSTM WIND 40	16 Ese Bay Ridge, MD	SAINT MICHAELS
Jun 15, 12:02 AM EDT	TSTM WND DMG	1 Wsw Easton, MD	DOWNED WIRES NEAR MAIDEN POINT COURT. TIME ESTIMATED FROM RADAR.
Jun 15, 12:04 AM EDT	TSTM WND DMG	Easton, MD	SEVERAL REPORTS OF POWER LINES DOWN AND NUMEROUS OUTAGES IN PORTIONS OF THE EASTON AREA. 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
Jun 14, 7:29 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 3.1 hours before the alert went out and 104 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: 763 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1915 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

840 
WUUS51 KPHI 150303
SVRPHI
MDC011-029-035-041-150400-
/O.NEW.KPHI.SV.W.0089.210615T0303Z-210615T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1103 PM EDT Mon Jun 14 2021

The National Weather Service in Mount Holly NJ has issued a

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

* Until midnight EDT.

* At 1103 PM EDT, severe thunderstorms were located along a line
  extending from Overton to near Bowie, moving southeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter 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...
  Easton, Talbot, Denton, Centreville, Romancoke, Ridgely, St.
  Michaels, Queen Anne, Grasonville, Starr, Tilghman Island,
  Stevensville, Skipton, Copperville, Jumptown, Chester, Matthews,
  Wye Mills, Griffin and Cordova.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3886 7626 3879 7620 3879 7619 3897 7625
      3884 7637 3884 7638 3903 7632 3904 7631
      3898 7628 3900 7617 3908 7623 3908 7622
      3894 7573 3892 7573 3883 7572 3872 7630
      3878 7629 3867 7634 3877 7638
TIME...MOT...LOC 0303Z 294DEG 26KT 3903 7625 3890 7668 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

1 follow-up statement

901 
WWUS51 KPHI 150329
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1129 PM EDT Mon Jun 14 2021

MDC029-150337-
/O.CAN.KPHI.SV.W.0089.000000T0000Z-210615T0400Z/
Kent MD-
1129 PM EDT Mon Jun 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KENT COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM EDT for
central and southern Delaware...and eastern and northeastern
Maryland.

LAT...LON 3903 7632 3904 7631 3897 7622 3900 7617
      3907 7618 3894 7573 3883 7572 3874 7630
      3878 7629 3867 7634 3875 7637 3886 7626
      3879 7620 3883 7619 3897 7625 3895 7631
      3885 7637 3885 7638
TIME...MOT...LOC 0327Z 293DEG 27KT 3894 7601 3890 7622 3884 7650 

$$

MDC011-035-041-150400-
/O.CON.KPHI.SV.W.0089.000000T0000Z-210615T0400Z/
Talbot MD-Queen Anne's MD-Caroline MD-
1129 PM EDT Mon Jun 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT
FOR NORTHERN TALBOT...SOUTHWESTERN QUEEN ANNE'S AND CENTRAL CAROLINE
COUNTIES...

At 1127 PM EDT, severe thunderstorms were located along a line
extending from near Starr to near Grasonville to Shady Side, moving
southeast at 30 mph.

HAZARD...60 mph wind gusts and quarter 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...
Easton, Talbot, Denton, Centreville, Ridgely, St. Michaels, Queen
Anne, Grasonville, Starr, Tilghman Island, Stevensville, Skipton,
Copperville, Jumptown, Chester, Matthews, Wye Mills, Griffin, Cordova
and Queenstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3903 7632 3904 7631 3897 7622 3900 7617
      3907 7618 3894 7573 3883 7572 3874 7630
      3878 7629 3867 7634 3875 7637 3886 7626
      3879 7620 3883 7619 3897 7625 3895 7631
      3885 7637 3885 7638
TIME...MOT...LOC 0327Z 293DEG 27KT 3894 7601 3890 7622 3884 7650 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	67 min
Jun 14, 10:55 PM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's	2 hr
Jun 14, 11:12 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	63 min
Jun 14, 11:39 PM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's	85 min
Jun 14, 11:42 PM EDT	Severe Thunderstorm Warning	PHI	Kent	63 min
Jun 14, 11:51 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	54 min
Jun 14, 11:54 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	66 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2021 Every severe thunderstorm warning in 2021

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.