Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 165, NWS Philadelphia/Mount Holly

July 22, 2020Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2020, 5:23 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 52 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: Jul 22, 2020, 5:23 PM EDT (21:23 UTC)
Expired: Jul 22, 2020, 6:15 PM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Dover AFB radar (KDOX), 40 km from the middle of the area, began a volume at 21:23 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 22, 5:57 PM EDT	TSTM WND DMG	2 Se Federalsburg, MD	DOWNED WIRES NEAR RELIANCE ROAD SOUTHEAST OF FEDERALSBURG. TIME ESTIMATED FROM RADAR.
Jul 22, 5:57 PM EDT	TSTM WND DMG	3 Ene Federalsburg, MD	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 3 ENE FEDERALSBURG. DOWNED WIRES NEAR BRIDGEVILLE ROAD EAST OF FEDERALSBURG. 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 22, 2:57 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.4 hours before the alert went out and 98 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: 186 J/kg
Mixed-layer CIN: -242 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

947 
WUUS51 KPHI 222123
SVRPHI
DEC001-005-MDC011-035-041-222215-
/O.NEW.KPHI.SV.W.0165.200722T2123Z-200722T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
523 PM EDT Wed Jul 22 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  West central Sussex County in southern Delaware...
  Western Kent County in central Delaware...
  Talbot County in eastern Maryland...
  Southeastern Queen Anne's County in northeastern Maryland...
  Caroline County in eastern Maryland...

* Until 615 PM EDT.

* At 523 PM EDT, severe thunderstorms were located along a line
  extending from near Centreville to Easton to near University Of
  Maryland Center For Environmental Studies, moving east at 35 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Easton, Centerville, Denton, Centreville, Harrington, Federalsburg,
  Greensboro, Oakland, Ridgely, Trappe, Preston, Sudlersville,
  Goldsboro, Queen Anne, Hartly, Smithville, Starr, Jumptown,
  Hazlettville and Agner.

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 3865 7571 3869 7577 3868 7580 3870 7580
      3871 7584 3868 7593 3860 7599 3857 7604
      3863 7608 3862 7612 3865 7616 3876 7610
      3903 7614 3929 7566 3886 7556 3856 7570
TIME...MOT...LOC 2123Z 254DEG 32KT 3908 7612 3879 7605 3858 7616 

HAIL...0.75IN
WIND...60MPH
 
$$

MPS

2 follow-up statements

314 
WWUS51 KPHI 222157
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
557 PM EDT Wed Jul 22 2020

MDC041-222206-
/O.CAN.KPHI.SV.W.0165.000000T0000Z-200722T2215Z/
Talbot MD-
557 PM EDT Wed Jul 22 2020

...THE SEVERE THUNDERSTORM WARNING FOR TALBOT 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 1000 PM EDT for
central and southern Delaware...and eastern and northeastern
Maryland.

LAT...LON 3860 7568 3859 7570 3865 7571 3869 7577
      3868 7580 3870 7580 3871 7584 3869 7591
      3866 7594 3883 7586 3914 7593 3929 7566
      3886 7556
TIME...MOT...LOC 2156Z 250DEG 23KT 3915 7585 3886 7578 3865 7589 

$$

DEC001-005-MDC011-035-222215-
/O.CON.KPHI.SV.W.0165.000000T0000Z-200722T2215Z/
Sussex DE-Kent DE-Queen Anne's MD-Caroline MD-
557 PM EDT Wed Jul 22 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR WEST CENTRAL SUSSEX...WESTERN KENT...EAST CENTRAL QUEEN ANNE'S
AND CAROLINE COUNTIES...

At 556 PM EDT, severe thunderstorms were located along a line
extending from near Sudlersville to near Denton to near Hurlock,
moving east at 25 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Denton, Harrington, Federalsburg, Greensboro, Oakland, Ridgely,
Preston, Sudlersville, Goldsboro, Hartly, Harmony, Smithville,
Hazlettville, Agner, Sandtown, Andrewsville, Greenwood, Kenton,
Henderson and Marydel.

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.

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

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

&&

LAT...LON 3860 7568 3859 7570 3865 7571 3869 7577
      3868 7580 3870 7580 3871 7584 3869 7591
      3866 7594 3883 7586 3914 7593 3929 7566
      3886 7556
TIME...MOT...LOC 2156Z 250DEG 23KT 3915 7585 3886 7578 3865 7589 

HAIL...0.75IN
WIND...60MPH
 
$$

MPS

889 
WWUS51 KPHI 222217
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
617 PM EDT Wed Jul 22 2020

DEC001-005-MDC011-035-222226-
/O.EXP.KPHI.SV.W.0165.000000T0000Z-200722T2215Z/
Sussex DE-Kent DE-Queen Anne's MD-Caroline MD-
617 PM EDT Wed Jul 22 2020

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL SUSSEX...WESTERN
KENT...EAST CENTRAL QUEEN ANNE'S AND CAROLINE COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central and 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 3860 7568 3859 7570 3865 7571 3869 7577
      3868 7580 3870 7580 3871 7584 3869 7591
      3866 7594 3883 7586 3914 7593 3929 7566
      3886 7556
TIME...MOT...LOC 2216Z 254DEG 32KT 3920 7563 3891 7556 3870 7567 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 10:14 PM EDT	Special Weather Statement	PHI	Kent	46 min
Jul 21, 10:21 PM EDT	Severe Thunderstorm Warning	PHI	Kent	54 min
Jul 22, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	57 min
Jul 22, 5:54 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	51 min
Jul 21, 9:16 PM EDT	Special Weather Statement	PHI	Kent	29 min
Jul 21, 9:25 PM EDT	Special Weather Statement	PHI	Talbot	35 min
Jul 21, 9:39 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	51 min
Jul 21, 9:46 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	29 min
Jul 22, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	22 min
Jul 22, 4:38 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	52 min
Jul 22, 4:47 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	43 min
Jul 22, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	47 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2020 Severe Thunderstorm Warnings in Delaware, 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.