Alert archive / Delaware / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 325, NWS Philadelphia/Mount Holly

September 8, 2023Kent County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 8, 2023, 2:15 PM EDT for Kent County, Delaware. It was in force for 45 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: Sep 8, 2023, 2:15 PM EDT (18:15 UTC)
Expired: Sep 8, 2023, 3:00 PM EDT
In force: 45 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 27 km from the middle of the area, began a volume at 18:15 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
Sep 8, 2:55 PM EDT	TSTM WND GST 54	3 S Kitts Hummock, DE	North Bayshore Drive weatherflow site.

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, 6.3 hours before the alert went out and 126 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: 2819 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

420 
WUUS51 KPHI 081815
SVRPHI
DEC001-081900-
/O.NEW.KPHI.SV.W.0325.230908T1815Z-230908T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
215 PM EDT Fri Sep 8 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Kent County in central Delaware...

* Until 300 PM EDT.

* At 215 PM EDT, a severe thunderstorm was located over Bowers, or 9
  miles southeast of Dover, moving northeast at 15 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...
  Dover, Milford, Bowers, Dover Base Housing, Rising Sun-Lebanon, Big
  Stone Beach, Frederica, Magnolia, Little Creek, Riverview and
  Woodside East.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

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

&&

LAT...LON 3902 7557 3923 7540 3919 7538 3907 7538
      3900 7530 3892 7544
TIME...MOT...LOC 1815Z 221DEG 13KT 3904 7543 

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

$$

Staarmann

1 follow-up statement

991 
WWUS51 KPHI 081831
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
231 PM EDT Fri Sep 8 2023

DEC001-081900-
/O.CON.KPHI.SV.W.0325.000000T0000Z-230908T1900Z/
Kent DE-
231 PM EDT Fri Sep 8 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHEASTERN KENT COUNTY...

At 231 PM EDT, a severe thunderstorm was located over Bowers, or 9
miles southeast of Dover, moving northeast at 15 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...
Dover, Milford, Bowers, Dover Base Housing, Rising Sun-Lebanon, Big
Stone Beach, Frederica, Magnolia, Little Creek, Riverview and
Woodside East.

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 3902 7557 3923 7540 3919 7538 3907 7538
      3900 7530 3892 7544
TIME...MOT...LOC 1831Z 221DEG 13KT 3908 7538 

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

$$

MLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 9:14 PM EDT	Severe Thunderstorm Warning	PHI	Kent	30 min
Sep 8, 1:21 PM EDT	Special Weather Statement	PHI	Sussex	24 min
Sep 8, 1:51 PM EDT	Special Weather Statement	PHI	Sussex	24 min
Sep 8, 2:05 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	40 min
Sep 8, 2:46 PM EDT	Special Weather Statement	PHI	Kent	29 min
Sep 8, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Kent	39 min
Sep 8, 3:27 PM EDT	Special Weather Statement	PHI	Kent, New Castle	33 min
Sep 8, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	44 min
Sep 8, 3:32 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	43 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.