Alert archive / Maryland / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 246, NWS Philadelphia/Mount Holly

July 28, 2023Kent County, New Castle County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2023, 10:07 PM EDT for Kent County, New Castle County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 38 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 28, 2023, 10:07 PM EDT (02:07 UTC)
Expired: Jul 28, 2023, 10:45 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 44 km from the middle of the area, began a volume at 02:07 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 28, 10:36 PM EDT	TSTM WND DMG	Smyrna, DE	Wires down in Smyrna. Time estimated from radar.
Jul 28, 10:41 PM EDT	TSTM WND DMG	Camden, DE	Wires down in Camden. 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.1 hours before the alert went out and 141 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: 3118 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1098 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 11.4

Open this sounding in Storm Lab

The text

As transmitted.

298 
WUUS51 KPHI 290207
SVRPHI
DEC001-003-MDC011-029-035-290245-
/O.NEW.KPHI.SV.W.0246.230729T0207Z-230729T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1007 PM EDT Fri Jul 28 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern New Castle County in northern Delaware...
  Kent County in central Delaware...
  Northeastern Queen Anne's County in northeastern Maryland...
  Northeastern Caroline County in eastern Maryland...
  Northeastern Kent County in northeastern Maryland...

* Until 1045 PM EDT.

* At 1006 PM EDT, severe thunderstorms were located along a line
  extending from near Chestertown to near Hope to near Denton, moving
  east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Dover, Smyrna, Chestertown, Denton, Camden, Clayton, Greensboro,
  Oakland, Ridgely, Cheswold, Church Hill, Millington, Sudlersville,
  Bowers, Goldsboro, Woodside, Viola, Hartly, Hazlettville and
  Morgnec.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3943 7553 3924 7535 3900 7530 3887 7590
      3907 7597 3923 7610
TIME...MOT...LOC 0206Z 261DEG 33KT 3923 7603 3909 7588 3891 7578 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MLB

2 follow-up statements

825 
WWUS51 KPHI 290220
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1020 PM EDT Fri Jul 28 2023

DEC001-003-MDC011-029-035-290245-
/O.CON.KPHI.SV.W.0246.000000T0000Z-230729T0245Z/
New Castle DE-Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
1020 PM EDT Fri Jul 28 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR SOUTHWESTERN NEW CASTLE...KENT...NORTHEASTERN QUEEN ANNE'S...
NORTHEASTERN CAROLINE AND NORTHEASTERN KENT COUNTIES...

At 1019 PM EDT, severe thunderstorms were located along a line
extending from Crumpton to near Hartly to near Harrington, moving
east at 40 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...
Dover, Smyrna, Chestertown, Denton, Camden, Clayton, Greensboro,
Oakland, Ridgely, Cheswold, Church Hill, Millington, Sudlersville,
Bowers, Goldsboro, Woodside, Viola, Hartly, Hazlettville and Morgnec.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3943 7553 3924 7535 3900 7530 3887 7590
      3907 7597 3923 7610
TIME...MOT...LOC 0219Z 261DEG 33KT 3925 7589 3911 7574 3893 7564 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

MLB

510 
WWUS51 KPHI 290230
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1030 PM EDT Fri Jul 28 2023

DEC001-003-MDC011-029-035-290245-
/O.CON.KPHI.SV.W.0246.000000T0000Z-230729T0245Z/
New Castle DE-Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
1030 PM EDT Fri Jul 28 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR SOUTHWESTERN NEW CASTLE...KENT...NORTHEASTERN QUEEN ANNE'S...
NORTHEASTERN CAROLINE AND NORTHEASTERN KENT COUNTIES...

At 1030 PM EDT, severe thunderstorms were located along a line
extending from near Delaney Corner to Hazlettville to near
Harrington, moving east at 40 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...
Dover, Smyrna, Denton, Camden, Clayton, Greensboro, Oakland, Ridgely,
Cheswold, Millington, Sudlersville, Bowers, Goldsboro, Woodside,
Viola, Hartly, Rising Sun-Lebanon, Woodland Beach, Hazlettville and
Morgnec.

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 these storms.
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 3943 7553 3924 7535 3900 7530 3888 7586
      3908 7591 3926 7601
TIME...MOT...LOC 0230Z 261DEG 33KT 3926 7576 3912 7561 3894 7552 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

MLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:04 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	41 min
Jul 28, 8:33 PM EDT	Special Weather Statement	PHI	New Castle	42 min
Jul 28, 10:44 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	31 min
Jul 28, 11:00 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	60 min
Jul 28, 11:33 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	27 min
Jul 28, 11:59 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	31 min
Jul 29, 12:12 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	36 min
Jul 29, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	50 min
Jul 29, 5:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	60 min
Jul 29, 5:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	46 min
Jul 29, 6:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, Sussex	75 min
Jul 29, 6:18 PM EDT	Tornado Warning	PHI	Sussex	27 min
Jul 29, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	49 min
Jul 28, 8:18 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	42 min
Jul 28, 9:30 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	45 min
Jul 29, 5:02 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline, Kent, Queen Anne's, Talbot	73 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2023 Severe Thunderstorm Warnings in Delaware, 2023 Every severe thunderstorm warning in 2023

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.