Alert archive / Maryland / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 18, NWS Philadelphia/Mount Holly

April 1, 2023Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 1, 2023, 7:50 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 40 min. 1 report 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 1, 2023, 7:50 PM EDT (23:50 UTC)
Expired: Apr 1, 2023, 8:30 PM EDT
In force: 40 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 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), 33 km from the middle of the area, began a volume at 23:53 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 1, 7:55 PM EDT	HAIL 1	Farmington, DE	TIME GIVEN IN REPORT.

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 1, 5:30 PM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.8 hours before the alert went out and 87 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: 706 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 434 m²/s²
0-3 km storm-relative helicity: 376 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

801 
WUUS51 KPHI 012350
SVRPHI
DEC001-005-MDC011-035-041-020030-
/O.NEW.KPHI.SV.W.0018.230401T2350Z-230402T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
750 PM EDT Sat Apr 1 2023

The National Weather Service in Mount Holly NJ has issued a

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

* Until 830 PM EDT.

* At 749 PM EDT, severe thunderstorms were located along a line
  extending from near Wye Mills to Hambleton to near Taylors Island,
  moving east 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. These 
           storms will impact recovery effort across Sussex County.

* Locations impacted include...
  Easton, Georgetown, Milford, Seaford, Denton, Millsboro, Laurel,
  Harrington, Lewes, Federalsburg, Milton, Selbyville, Bridgeville,
  Delmar, Trappe, Dagsboro, Preston, Millville, Ellendale and
  Henlopen Acres.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Tornado Watch remains in effect until 1000 PM EDT for central and
southern Delaware...and eastern and northeastern Maryland.

&&

LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
      3871 7584 3868 7593 3860 7599 3858 7605
      3863 7608 3864 7615 3870 7612 3888 7621
      3892 7620 3890 7521 3880 7506 3846 7502
      3845 7520
TIME...MOT...LOC 2349Z 261DEG 30KT 3890 7613 3871 7604 3844 7623 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MLB

2 follow-up statements

168 
WWUS51 KPHI 020017
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
817 PM EDT Sat Apr 1 2023

MDC035-041-020027-
/O.CAN.KPHI.SV.W.0018.000000T0000Z-230402T0030Z/
Talbot MD-Queen Anne's MD-
817 PM EDT Sat Apr 1 2023

...THE SEVERE THUNDERSTORM WARNING FOR TALBOT AND SOUTH CENTRAL QUEEN
ANNE'S COUNTIES IS CANCELLED...

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

A Tornado Watch remains in effect until 1000 PM EDT for central and
southern Delaware...and eastern Maryland.

LAT...LON 3846 7569 3865 7572 3869 7577 3868 7580
      3870 7580 3871 7584 3869 7589 3870 7590
      3868 7593 3891 7578 3890 7521 3880 7506
      3846 7502 3845 7520
TIME...MOT...LOC 0017Z 261DEG 30KT 3893 7586 3874 7577 3847 7596 

$$

DEC001-005-MDC011-020030-
/O.CON.KPHI.SV.W.0018.000000T0000Z-230402T0030Z/
Sussex DE-Kent DE-Caroline MD-
817 PM EDT Sat Apr 1 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SUSSEX...SOUTHWESTERN KENT AND SOUTHEASTERN CAROLINE COUNTIES...

At 817 PM EDT, severe thunderstorms were located along a line
extending from Ridgely to Agner to 7 miles west of Vienna, moving
east 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...
Georgetown, Milford, Seaford, Millsboro, Laurel, Harrington, Lewes,
Federalsburg, Milton, Selbyville, Bridgeville, Delmar, Dagsboro,
Preston, Millville, Ellendale, Henlopen Acres, Smithville, Gumboro
and Cape Henlopen State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EDT for central and
southern Delaware...and eastern Maryland.

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

&&

LAT...LON 3846 7569 3865 7572 3869 7577 3868 7580
      3870 7580 3871 7584 3869 7589 3870 7590
      3868 7593 3891 7578 3890 7521 3880 7506
      3846 7502 3845 7520
TIME...MOT...LOC 0017Z 261DEG 30KT 3893 7586 3874 7577 3847 7596 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MLB

837 
WWUS51 KPHI 020029
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
829 PM EDT Sat Apr 1 2023

DEC001-005-MDC011-020038-
/O.EXP.KPHI.SV.W.0018.000000T0000Z-230402T0030Z/
Sussex DE-Kent DE-Caroline MD-
829 PM EDT Sat Apr 1 2023

...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTHWESTERN KENT AND
SOUTHEASTERN CAROLINE COUNTIES WILL EXPIRE AT 830 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 1000 PM EDT for central and
southern Delaware...and eastern Maryland.

Remember, a Severe Thunderstorm Warning still remains in effect for
Sussex County until 9:15 PM.

LAT...LON 3846 7569 3865 7572 3869 7577 3868 7580
      3870 7580 3871 7584 3869 7589 3870 7590
      3868 7593 3891 7578 3890 7521 3880 7506
      3846 7502 3845 7520
TIME...MOT...LOC 0028Z 261DEG 30KT 3894 7576 3875 7567 3848 7586 

$$

MLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 1, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	37 min
Apr 1, 6:01 PM EDT	Tornado Warning	PHI	Kent, Sussex	29 min
Apr 1, 6:22 PM EDT	Tornado Warning Tornado observed	PHI	Sussex	23 min
Apr 1, 6:33 PM EDT	Tornado Warning	PHI	New Castle	27 min
Apr 1, 6:39 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	51 min
Apr 1, 6:58 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	47 min
Apr 1, 7:20 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent	40 min
Apr 1, 7:36 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, Sussex	39 min
Apr 1, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	32 min
Apr 1, 5:34 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	26 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.