Alert archive / Delaware / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 18, 2025, 4:13 PM EDT for Caroline County, Maryland; Kent County, Sussex County, Delaware. It was in force for 47 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 18, 2025, 4:13 PM EDT (20:13 UTC)
- Expired
- Jun 18, 2025, 5:00 PM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 16 km from the middle of the area, began a volume at 20:15 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.
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 18, 12:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.2 hours before the alert went out and 108 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
- 1416 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1090 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.5
The text
As transmitted.
653
WUUS51 KPHI 182013
SVRPHI
DEC001-005-MDC011-182100-
/O.NEW.KPHI.SV.W.0068.250618T2013Z-250618T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
413 PM EDT Wed Jun 18 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Sussex County in southern Delaware...
Southern Kent County in central Delaware...
East central Caroline County in eastern Maryland...
* Until 500 PM EDT.
* At 413 PM EDT, a severe thunderstorm was located near Denton, or 16
miles southeast of Centerville, moving east at 35 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Milford, Harrington, Ellendale, Andrewsville, Felton, Greenwood,
Frederica, Houston, and Farmington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3884 7576 3900 7576 3901 7535 3877 7536
TIME...MOT...LOC 2013Z 276DEG 29KT 3893 7579
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
AKL3 follow-up statements
314
WWUS51 KPHI 182032
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
432 PM EDT Wed Jun 18 2025
MDC011-182042-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-250618T2100Z/
Caroline MD-
432 PM EDT Wed Jun 18 2025
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CAROLINE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central and southern Delaware.
LAT...LON 3889 7568 3900 7567 3901 7535 3877 7536
3881 7560 3887 7560
TIME...MOT...LOC 2032Z 274DEG 32KT 3892 7552
$$
DEC001-005-182100-
/O.CON.KPHI.SV.W.0068.000000T0000Z-250618T2100Z/
Sussex DE-Kent DE-
432 PM EDT Wed Jun 18 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTHWESTERN SUSSEX AND SOUTHERN KENT COUNTIES...
At 432 PM EDT, a severe thunderstorm was located over Harrington, or
16 miles south of Dover, moving east 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...
Milford, Harrington, Ellendale, Felton, Greenwood, Frederica,
Houston, and Farmington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3889 7568 3900 7567 3901 7535 3877 7536
3881 7560 3887 7560
TIME...MOT...LOC 2032Z 274DEG 32KT 3892 7552
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL454
WWUS51 KPHI 182044
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
444 PM EDT Wed Jun 18 2025
DEC001-005-182100-
/O.CON.KPHI.SV.W.0068.000000T0000Z-250618T2100Z/
Sussex DE-Kent DE-
444 PM EDT Wed Jun 18 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTH CENTRAL SUSSEX AND SOUTHEASTERN KENT COUNTIES...
At 443 PM EDT, a severe thunderstorm was located near Milford, or 15
miles north of Georgetown, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Milford, Ellendale, and Frederica.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3901 7535 3877 7536 3879 7548 3892 7548
3901 7549
TIME...MOT...LOC 2043Z 275DEG 29KT 3891 7535
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL615
WWUS51 KPHI 182052
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
452 PM EDT Wed Jun 18 2025
DEC001-005-182102-
/O.EXP.KPHI.SV.W.0068.000000T0000Z-250618T2100Z/
Sussex DE-Kent DE-
452 PM EDT Wed Jun 18 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SUSSEX AND
SOUTHEASTERN KENT COUNTIES WILL EXPIRE AT 500 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central and southern Delaware.
LAT...LON 3901 7535 3877 7536 3879 7548 3892 7548
3901 7549
TIME...MOT...LOC 2052Z 276DEG 29KT 3890 7527
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 3:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 45 min |
| Jun 18, 3:39 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 51 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2025Severe Thunderstorm Warnings in Maryland, 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.