Alert archive / Delaware / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 103, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2024, 8:15 PM EDT for Kent County, New Castle County, Delaware; Cumberland County, Salem County, New Jersey. It was in force for 45 min. 2 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 30, 2024, 8:15 PM EDT (00:15 UTC)
- Expired
- Jun 30, 2024, 9:00 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 78 km from the middle of the area, began a volume at 00:18 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 30, 8:20 PM EDT | MARINE TSTM WIND 43 | Lower Alloways Creek, NJ | NJWXNET Station: Lower Alloways Creek. |
| Jun 30, 8:40 PM EDT | MARINE TSTM WIND 51 | Lower Alloways Creek, NJ | Updates previous marine tstm wind report from Lower Alloways Creek. NJWXNET Station: Lower Alloways Creek. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 30, 11:09 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 3:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.3 hours before the alert went out and 178 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.
- Mixed-layer CAPE
- 1384 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1667 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
331
WUUS51 KPHI 010015
SVRPHI
DEC001-003-NJC011-033-010100-
/O.NEW.KPHI.SV.W.0103.240701T0015Z-240701T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
815 PM EDT Sun Jun 30 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Northeastern Kent County in central Delaware...
Central Cumberland County in southern New Jersey...
Salem County in southern New Jersey...
* Until 900 PM EDT.
* At 815 PM EDT, severe thunderstorms were located along a line
extending from near Woodstown to Middletown, moving southeast at 35
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Wilmington, Vineland, Dover, Newark, Millville, Bridgeton,
Middletown, Pennsville, Smyrna, Carneys Point, New Castle, Salem,
Woodstown, Alloway, Quinton, Delaware City, Elmer, Greenwich,
Shiloh, and Woodland Beach.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Delaware between mile markers 0 and 5.
Interstate 295 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3972 7539 3942 7491 3918 7551 3947 7578
3965 7579
TIME...MOT...LOC 0015Z 311DEG 32KT 3960 7529 3946 7574
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich1 follow-up statement
500
WWUS51 KPHI 010053
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
853 PM EDT Sun Jun 30 2024
DEC001-003-NJC011-033-010103-
/O.EXP.KPHI.SV.W.0103.000000T0000Z-240701T0100Z/
New Castle DE-Kent DE-Cumberland NJ-Salem NJ-
853 PM EDT Sun Jun 30 2024
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE...
NORTHEASTERN KENT...CENTRAL CUMBERLAND AND SALEM COUNTIES WILL EXPIRE
AT 900 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
central Delaware...and southern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3972 7539 3942 7491 3918 7551 3947 7578
3965 7579
TIME...MOT...LOC 0053Z 292DEG 29KT 3951 7511 3942 7578
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:45 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jun 30, 9:03 PM EDT | River Flood Warning | PHI | New Castle | 3 hr |
| Jun 30, 8:24 PM EDT | Special Marine Warning | PHI | 96 min | |
| Jun 30, 8:52 PM EDT | Special Marine Warning | PHI | 83 min | |
| Jun 30, 9:38 PM EDT | Special Marine Warning | PHI | 37 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2024Severe Thunderstorm Warnings in New Jersey, 2024Every severe thunderstorm warning in 2024
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.