Alert archive / Delaware / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 63, NWS Philadelphia/Mount Holly

June 8, 2023Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 8, 2023, 1:38 PM EDT for Sussex County, Delaware. It was in force for 37 min. 4 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: Jun 8, 2023, 1:38 PM EDT (17:38 UTC)
Expired: Jun 8, 2023, 2:15 PM EDT
In force: 37 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), 53 km from the middle of the area, began a volume at 17:42 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
Jun 8, 1:46 PM EDT	HAIL 0.7	3 W Fenwick Island, DE	Report of Dime Size Hail covering the ground.
Jun 8, 1:46 PM EDT	HAIL 0.7	3 W Fenwick Island, DE	Report of Dime Size Hail covering the ground.
Jun 8, 1:55 PM EDT	HAIL 1	3 Ssw Millville, DE	Report of Video showing Quarter Sized Hail in Bayard, DE covering the ground.
Jun 8, 1:55 PM EDT	HAIL 1	3 Ssw Millville, DE	Report of Video showing Quarter Sized Hail in Bayard, DE covering the ground.

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 12:00Z, 5.6 hours before the alert went out and 70 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: 206 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 997 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

829 
WUUS51 KPHI 081738
SVRPHI
DEC005-081815-
/O.NEW.KPHI.SV.W.0063.230608T1738Z-230608T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
138 PM EDT Thu Jun 8 2023

The National Weather Service in Mount Holly NJ has issued a

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

* Until 215 PM EDT.

* At 137 PM EDT, a severe thunderstorm was located near Millville, or
  9 miles north of Ocean City, moving east 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...
  Selbyville, Millville, Ocean View and South Bethany. 

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, occasional 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.

&&

LAT...LON 3845 7503 3846 7505 3845 7505 3845 7523
      3858 7520 3857 7484 3847 7483 3845 7483
TIME...MOT...LOC 1737Z 275DEG 18KT 3849 7512 

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

$$

Robertson

3 follow-up statements

210 
WWUS51 KPHI 081752
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
152 PM EDT Thu Jun 8 2023

DEC005-081815-
/O.CON.KPHI.SV.W.0063.000000T0000Z-230608T1815Z/
Sussex DE-
152 PM EDT Thu Jun 8 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...

At 152 PM EDT, a severe thunderstorm was located near Millville, or 8
miles north of Ocean City, moving east 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.

&&

LAT...LON 3857 7513 3857 7484 3845 7484 3845 7502
      3846 7505 3845 7505 3845 7515
TIME...MOT...LOC 1752Z 275DEG 18KT 3848 7503 

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

$$

MLB

541 
WWUS51 KPHI 081759
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
159 PM EDT Thu Jun 8 2023

DEC005-081815-
/O.CON.KPHI.SV.W.0063.000000T0000Z-230608T1815Z/
Sussex DE-
159 PM EDT Thu Jun 8 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...

At 158 PM EDT, a severe thunderstorm was located 8 miles southeast of
Millville, or 9 miles northeast of Ocean City, moving east at 20 mph.

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

SOURCE...Broadcast media. At 1:55 PM, broadcast media reported 1 
         inch hail in Bayard.

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.

&&

LAT...LON 3856 7511 3856 7484 3845 7484 3845 7502
      3846 7505 3845 7505 3845 7513
TIME...MOT...LOC 1758Z 275DEG 18KT 3848 7499 

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

$$

MLB

701 
WWUS51 KPHI 081808
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
208 PM EDT Thu Jun 8 2023

DEC005-081818-
/O.EXP.KPHI.SV.W.0063.000000T0000Z-230608T1815Z/
Sussex DE-
208 PM EDT Thu Jun 8 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY
WILL EXPIRE AT 215 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

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 3856 7511 3856 7484 3845 7484 3845 7502
      3846 7505 3845 7505 3845 7513
TIME...MOT...LOC 1808Z 275DEG 18KT 3848 7495 

$$

MLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 11:17 AM EDT	Special Weather Statement	PHI	Sussex	28 min
Jun 8, 11:43 AM EDT	Special Weather Statement	PHI	Sussex	32 min
Jun 8, 11:52 AM EDT	Special Weather Statement	PHI	Sussex	53 min
Jun 8, 12:02 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	43 min
Jun 8, 12:12 PM EDT	Special Weather Statement	PHI	Sussex	18 min
Jun 8, 12:23 PM EDT	Special Weather Statement	PHI	Sussex	22 min
Jun 8, 12:43 PM EDT	Special Weather Statement	PHI	Sussex	47 min
Jun 8, 1:28 PM EDT	Special Weather Statement	PHI	Sussex	47 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.