Alert archive / Delaware / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 77, NWS Philadelphia/Mount Holly

June 16, 2023Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 16, 2023, 5:27 PM EDT for Sussex County, Delaware. It was in force for 48 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: Jun 16, 2023, 5:27 PM EDT (21:27 UTC)
Expired: Jun 16, 2023, 6:15 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 52 km from the middle of the area, began a volume at 21:29 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.

Issued	Product	Office	Lasted
Jun 16, 11:06 AM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.5 hours before the alert went out and 68 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: 1057 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 816 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted.

466 
WUUS51 KPHI 162127
SVRPHI
DEC005-162215-
/O.NEW.KPHI.SV.W.0077.230616T2127Z-230616T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
527 PM EDT Fri Jun 16 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Sussex County in southern Delaware...

* Until 615 PM EDT.

* At 527 PM EDT, a severe thunderstorm was located over Ocean Pines,
  or near Ocean City, moving northeast at 20 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...
  Millville, Ocean View and South Bethany. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

Frequent cloud to ground lightning is occurring with this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

&&

LAT...LON 3845 7502 3846 7505 3845 7505 3845 7522
      3846 7521 3860 7504 3851 7495 3847 7492
      3845 7493
TIME...MOT...LOC 2127Z 233DEG 18KT 3841 7518 

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

$$

Wunderlin

1 follow-up statement

718 
WWUS51 KPHI 162203
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
603 PM EDT Fri Jun 16 2023

DEC005-162215-
/O.CON.KPHI.SV.W.0077.000000T0000Z-230616T2215Z/
Sussex DE-
603 PM EDT Fri Jun 16 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...

At 603 PM EDT, a severe thunderstorm was located near Millville, or
12 miles north of Ocean City, moving northeast at 20 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...
Millville, Ocean View and South Bethany. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

Frequent cloud to ground lightning is occurring with this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

&&

LAT...LON 3845 7502 3846 7505 3845 7505 3845 7522
      3846 7521 3860 7504 3851 7495 3847 7492
      3845 7493
TIME...MOT...LOC 2203Z 233DEG 18KT 3852 7499 

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

$$

Wunderlin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 11:20 AM EDT	Severe Thunderstorm Warning	PHI	New Castle	40 min
Jun 16, 11:29 AM EDT	Special Weather Statement	PHI	New Castle	31 min
Jun 16, 11:40 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	50 min
Jun 16, 11:46 AM EDT	Severe Thunderstorm Warning	PHI	New Castle	59 min
Jun 16, 12:28 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	47 min
Jun 16, 12:46 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jun 16, 4:05 PM EDT	Special Weather Statement	PHI	Sussex	25 min
Jun 16, 4:29 PM EDT	Special Weather Statement	PHI	Sussex	46 min
Jun 16, 5:45 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.