Alert archive / Delaware / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 208, NWS Philadelphia/Mount Holly

July 19, 2023Kent County, Sussex County, Delaware; Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 19, 2023, 8:32 AM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 29 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
Jul 19, 2023, 8:32 AM EDT (12:32 UTC)
Expired
Jul 19, 2023, 9:01 AM EDT
In force
29 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

Counties Kent County, DE, Sussex County, DE, Caroline County, MD

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 0.5 hours before the alert went out and 83 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, Wallops Is Stn, VA at 12:00Z on 2023-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1625 joules per kilogram.LCLLFCEL10008507005003002001001 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, Wallops Is Stn, VA at 12:00Z on 2023-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.193958Sfc1 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
1625 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1083 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.6
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

690 
WUUS51 KPHI 191232
SVRPHI
DEC001-005-MDC011-191315-
/O.NEW.KPHI.SV.W.0208.230719T1232Z-230719T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
832 AM EDT Wed Jul 19 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Western Sussex County in southern Delaware...
  South central Kent County in central Delaware...
  Southeastern Caroline County in eastern Maryland...

* Until 915 AM EDT.

* At 832 AM EDT, a severe thunderstorm was located near Bridgeville,
  or 13 miles northeast of Hurlock, moving east at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Georgetown, Seaford, Laurel, Milton, Bridgeville, Ellendale,
  Sycamore, Smithville, Gumboro, Blades, Greenwood and Bethel.

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.

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

&&

LAT...LON 3852 7570 3864 7571 3869 7577 3883 7577
      3890 7531 3847 7535
TIME...MOT...LOC 1232Z 268DEG 25KT 3875 7567 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS
2 follow-up statements
965 
WWUS51 KPHI 191247
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
847 AM EDT Wed Jul 19 2023

DEC001-MDC011-191256-
/O.CAN.KPHI.SV.W.0208.000000T0000Z-230719T1315Z/
Kent DE-Caroline MD-
847 AM EDT Wed Jul 19 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL KENT AND
SOUTHEASTERN CAROLINE COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3848 7544 3859 7566 3884 7556 3887 7550
      3890 7531 3847 7535
TIME...MOT...LOC 1246Z 288DEG 28KT 3871 7551 

$$

DEC005-191315-
/O.CON.KPHI.SV.W.0208.000000T0000Z-230719T1315Z/
Sussex DE-
847 AM EDT Wed Jul 19 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM EDT
FOR CENTRAL SUSSEX COUNTY...

At 846 AM EDT, a severe thunderstorm was located near Bridgeville, or
near Georgetown, moving east at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Georgetown, Seaford, Laurel, Milton, Bridgeville, Ellendale,
Sycamore, Gumboro, Blades and Bethel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3848 7544 3859 7566 3884 7556 3887 7550
      3890 7531 3847 7535
TIME...MOT...LOC 1246Z 288DEG 28KT 3871 7551 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS
426 
WWUS51 KPHI 191301
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
901 AM EDT Wed Jul 19 2023

DEC005-191311-
/O.CAN.KPHI.SV.W.0208.000000T0000Z-230719T1315Z/
Sussex DE-
901 AM EDT Wed Jul 19 2023

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SUSSEX COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

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 3848 7544 3859 7566 3884 7556 3887 7550
      3890 7531 3847 7535
TIME...MOT...LOC 1258Z 268DEG 25KT 3871 7538 

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 8:07 AM EDTSpecial Weather StatementPHIKent23 min
Jul 19, 8:26 AM EDTSpecial Weather StatementPHIKent34 min
Jul 19, 8:56 AM EDTSpecial Weather StatementPHISussex34 min
Jul 19, 10:13 AM EDTSpecial Weather StatementPHISussex32 min
Jul 19, 5:53 AM EDTSpecial Weather StatementPHICaroline, Talbot52 min
Jul 19, 7:06 AM EDTSpecial Weather StatementPHICaroline, Queen Anne's, Talbot24 min
Jul 19, 7:20 AM EDTSpecial Weather StatementPHICaroline, Queen Anne's, Talbot10 min
Jul 19, 7:40 AM EDTAreal Flood AdvisoryPHICaroline, Queen Anne's, Talbot4 hr
Jul 19, 8:02 AM EDTSpecial Weather StatementPHICaroline28 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2023Severe Thunderstorm Warnings in Maryland, 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.