Alert archive / Maryland / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 15, NWS Philadelphia/Mount Holly

April 1, 20234 counties in Maryland; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 1, 2023, 7:20 PM EDT for 4 counties in Maryland; Kent County, Delaware. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 1, 2023, 7:20 PM EDT (23:20 UTC)
Expired
Apr 1, 2023, 8:00 PM EDT
In force
40 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Damage threat
Considerable
Hail
1.0 in
Wind
70.0 mph

Counties Kent County, DE, 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 23:23 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 1, 5:30 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.3 hours before the alert went out and 106 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2023-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2023-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 448 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
648 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
448 m²/s²
0-3 km storm-relative helicity
443 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

875 
WUUS51 KPHI 012320
SVRPHI
DEC001-MDC011-029-035-041-020000-
/O.NEW.KPHI.SV.W.0015.230401T2320Z-230402T0000Z/

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

The National Weather Service in Mount Holly NJ has issued a

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

* Until 800 PM EDT.

* At 720 PM EDT, a severe thunderstorm was located over Overton, or 7
  miles west of Centerville, moving east at 60 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Centerville, Centreville, Greensboro, Oakland, Ridgely, Goldsboro,
  Queen Anne, Grasonville, Starr, Jumptown, Overton, Wye Mills,
  Sandtown, Carville, Hope, Chester, Queenstown, Hillsboro and
  Henderson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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
Delaware...and eastern and northeastern Maryland.

&&

LAT...LON 3898 7628 3897 7622 3900 7617 3903 7624
      3909 7623 3911 7569 3889 7566 3892 7620
      3896 7624 3893 7626 3892 7626 3894 7628
      3893 7629 3900 7629
TIME...MOT...LOC 2320Z 270DEG 54KT 3900 7620 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 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.

IssuedProductOfficeCountiesLasted
Apr 1, 5:13 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot32 min
Apr 1, 5:34 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's26 min
Apr 1, 5:38 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot37 min
Apr 1, 6:58 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's47 min
Apr 1, 7:36 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICaroline, Queen Anne's, Talbot39 min
Apr 1, 7:50 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot40 min
Apr 1, 6:01 PM EDTTornado WarningPHIKent, Sussex29 min
Apr 1, 6:22 PM EDTTornado Warning Tornado observedPHISussex23 min
Apr 1, 6:33 PM EDTTornado WarningPHINew Castle27 min
Apr 1, 6:39 PM EDTSevere Thunderstorm Warning Considerable damage threatPHIKent, New Castle51 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2023Severe Thunderstorm Warnings in Delaware, 2023Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.