Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 141, NWS Philadelphia/Mount Holly

July 6, 2020Caroline County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2020, 7:03 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 42 min. 13 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: Jul 6, 2020, 7:03 PM EDT (23:03 UTC)
Expired: Jul 6, 2020, 7:45 PM EDT
In force: 42 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

The radar

The Dover AFB radar (KDOX), 73 km from the middle of the area, began a volume at 23:05 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
Jul 6, 7:12 PM EDT	TSTM WND GST 66	Tolchester Beach, MD	TCBM2.
Jul 6, 7:19 PM EDT	TSTM WND DMG	2 Nne Langford, MD	STATE HIGHWAY 20 WESTBOUND AT BELL ROSE LANE CLOSED FROM WIND-BLOWN DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:20 PM EDT	TSTM WND DMG	2 Ne Langford, MD	STATE HIGHWAY 20 WESTBOUND AT STATE HIGHWAY 446 CLOSED FROM WIND-BLOWN DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:23 PM EDT	TSTM WND DMG	2 Ese Old Town, MD	SOME SPORADIC TREES SNAPPED FROM STRAIGHT LINE WINDS ALONG LANDS END ROAD, ESPECIALLY BETWEEN JACK ELLIOTT WAY AND BOOKERS WHART ROAD, THEN EAST SOUTHEASTWARD TOWARD CHURCH HILL ROAD BETWEEN CHURCH HILL AND CENTREVILLE. TIME ESTIMATED FROM RADAR.
Jul 6, 7:28 PM EDT	TSTM WND DMG	Crumpton, MD	MD-290 CLOSED IN BOTH DIRECTIONS NEAR FRONT ST DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:28 PM EDT	TSTM WND DMG	Crumpton, MD	MD-290 CLOSED IN BOTH DIRECTIONS NEAR FRONT ST DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:30 PM EDT	TSTM WND DMG	2 Sw Carville, MD	MD-304 CLOSED NEAR US-301 DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:30 PM EDT	TSTM WND DMG	2 Sw Carville, MD	MD-304 CLOSED NEAR US-301 DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:30 PM EDT	TSTM WND DMG	2 Sw Carville, MD	US-301 SOUTH CLOSED NEAR RUTHSBURG RD DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:35 PM EDT	TSTM WND DMG	Centreville, MD	TREES DOWN NEAR AND AROUND CENTREVILLE.
Jul 6, 7:35 PM EDT	TSTM WND DMG	Centreville, MD	TREES DOWN NEAR AND AROUND CENTREVILLE.
Jul 6, 7:44 PM EDT	TSTM WND DMG	2 Wnw Goldsboro, MD	MD 313 CLOSED IN BOTH DIRECTIONS FROM HOLLINGSWORTH CIRCLE TO JONES RD DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR.
Jul 6, 7:54 PM EDT	TSTM WND GST 60	Goldsboro, MD	VIDEO ON SOCIAL MEDIA OF WINDS WHICH APPEARED TO BE AT LEAST 60 MPH. 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
Jul 6, 1:38 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.1 hours before the alert went out and 111 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: 1250 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1150 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

153 
WUUS51 KPHI 062303
SVRPHI
MDC011-029-035-062345-
/O.NEW.KPHI.SV.W.0141.200706T2303Z-200706T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
703 PM EDT Mon Jul 6 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 745 PM EDT.

* At 703 PM EDT, a severe thunderstorm was located near Langford, or
  11 miles east of Millers Island, moving southeast at 35 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...
  Centerville, Chestertown, Denton, Centreville, Greensboro, Oakland,
  Ridgely, Rock Hall, Church Hill, Sudlersville, Goldsboro, Old Town,
  Starr, Jumptown, Newtown, Morgnec, Crumpton, Langford, Starkey
  Corner and Carville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3926 7622 3928 7620 3929 7617 3930 7618
      3932 7618 3919 7575 3886 7573 3906 7623
      3909 7623 3913 7625 3915 7628 3917 7628
TIME...MOT...LOC 2303Z 298DEG 29KT 3920 7621 

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

Robertson

1 follow-up statement

946 
WWUS51 KPHI 062331
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
731 PM EDT Mon Jul 6 2020

MDC011-029-035-062345-
/O.CON.KPHI.SV.W.0141.000000T0000Z-200706T2345Z/
Queen Anne's MD-Caroline MD-Kent MD-
731 PM EDT Mon Jul 6 2020

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

At 730 PM EDT, a severe thunderstorm was located over Carville, or
near Centerville, moving southeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. A tornado warning 
         remains in effect as well.

SOURCE...Radar indicated.

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

Locations impacted include...
Centerville, Chestertown, Denton, Centreville, Greensboro, Oakland,
Ridgely, Rock Hall, Church Hill, Sudlersville, Goldsboro, Old Town,
Starr, Jumptown, Morgnec, Crumpton, Langford, Starkey Corner,
Carville and Hope.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3918 7627 3927 7600 3919 7575 3886 7573
      3906 7623 3909 7623 3913 7625 3915 7628
      3917 7628
TIME...MOT...LOC 2330Z 307DEG 25KT 3908 7602 

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

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 12:52 PM EDT	Flash Flood Watch	PHI	Cecil	8 hr
Jul 6, 4:49 PM EDT	Special Weather Statement	PHI	Cecil	56 min
Jul 6, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	61 min
Jul 6, 5:43 PM EDT	Areal Flood Advisory	PHI	Cecil	3 hr
Jul 6, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	48 min
Jul 6, 6:37 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	53 min
Jul 6, 7:23 PM EDT	Tornado Warning	PHI	Caroline, Kent, Queen Anne's	19 min
Jul 6, 7:41 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	64 min
Jul 6, 7:48 PM EDT	Areal Flood Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	117 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.