Alert archive / Delaware / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 21, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 26, 2025, 7:55 PM EDT for Sussex County, Delaware. It was in force for 34 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
- Apr 26, 2025, 7:55 PM EDT (23:55 UTC)
- Expired
- Apr 26, 2025, 8:29 PM EDT
- In force
- 34 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 23:57 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 nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.9 hours before the alert went out and 67 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
- 266 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 921 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
073
WUUS51 KPHI 262355
SVRPHI
DEC005-270045-
/O.NEW.KPHI.SV.W.0021.250426T2355Z-250427T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
755 PM EDT Sat Apr 26 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Sussex County in southern Delaware...
* Until 845 PM EDT.
* At 755 PM EDT, a severe thunderstorm was located near Gumboro, or
14 miles south of Georgetown, moving east at 40 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...
Dagsboro, Ocean View, Gumboro, Selbyville, Millville, South
Bethany, Frankford, and Millsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3845 7503 3846 7505 3845 7505 3845 7537
3846 7540 3858 7539 3858 7484 3846 7483
3845 7483
TIME...MOT...LOC 2355Z 273DEG 36KT 3849 7531
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM3 follow-up statements
401
WWUS51 KPHI 270010
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
810 PM EDT Sat Apr 26 2025
DEC005-270045-
/O.CON.KPHI.SV.W.0021.000000T0000Z-250427T0045Z/
Sussex DE-
810 PM EDT Sat Apr 26 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
At 810 PM EDT, a severe thunderstorm was located near Millville, or 8
miles north of Ocean City, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dagsboro, Ocean View, Selbyville, Millville, South Bethany,
Frankford, and Millsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3845 7529 3849 7525 3858 7529 3858 7484
3845 7483 3845 7503 3846 7505 3845 7505
TIME...MOT...LOC 0010Z 273DEG 36KT 3848 7511
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM911
WWUS51 KPHI 270023
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
823 PM EDT Sat Apr 26 2025
DEC005-270045-
/O.CON.KPHI.SV.W.0021.000000T0000Z-250427T0045Z/
Sussex DE-
823 PM EDT Sat Apr 26 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
At 823 PM EDT, a severe thunderstorm was located 7 miles southeast of
Millville, or 9 miles north of Ocean City, moving east at 40 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...
Ocean View, Millville, and South Bethany.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3845 7513 3849 7510 3858 7515 3858 7484
3845 7483 3845 7503 3846 7505 3845 7505
TIME...MOT...LOC 0023Z 271DEG 34KT 3849 7500
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM304
WWUS51 KPHI 270029
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
829 PM EDT Sat Apr 26 2025
DEC005-270039-
/O.CAN.KPHI.SV.W.0021.000000T0000Z-250427T0045Z/
Sussex DE-
829 PM EDT Sat Apr 26 2025
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 3845 7513 3849 7510 3858 7515 3858 7484
3845 7483 3845 7503 3846 7505 3845 7505
TIME...MOT...LOC 0028Z 273DEG 36KT 3849 7492
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 42 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2025Every severe thunderstorm warning in 2025
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.