Alert archive / Delaware / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Dec 31, 2024, 7:15 PM EST for Kent County, New Castle County, Sussex County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 22 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
- Dec 31, 2024, 7:15 PM EST (00:15 UTC)
- Expired
- Dec 31, 2024, 7:37 PM EST
- In force
- 22 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 30 km from the middle of the area, began a volume at 00:16 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 00:00Z, 0.3 hours before the alert went out and 125 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
- 707 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 418 m²/s²
- 0-3 km storm-relative helicity
- 415 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted.
503
WUUS51 KPHI 010015
SVRPHI
DEC001-003-005-MDC011-029-035-010100-
/O.NEW.KPHI.SV.W.0001.250101T0015Z-250101T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
715 PM EST Tue Dec 31 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southwestern New Castle County in northern Delaware...
Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Northeastern Kent County in northeastern Maryland...
* Until 800 PM EST.
* At 715 PM EST, severe thunderstorms were located along a line
extending from near Church Hill to near Denton to 13 miles south of
Cambridge, moving northeast at 50 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Dover, Middletown, Georgetown, Smyrna, Milford, Seaford,
Chestertown, Denton, Millsboro, Laurel, Harrington, Camden,
Clayton, Federalsburg, Milton, Bridgeville, Greensboro, Oakland,
Ridgely, and Cheswold.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3865 7571 3869 7577 3870 7589 3884 7582
3932 7615 3937 7603 3936 7588 3938 7577
3946 7577 3952 7558 3931 7537 3939 7548
3939 7549 3927 7537 3905 7537 3890 7525
3856 7530 3846 7559 3846 7569
TIME...MOT...LOC 0015Z 232DEG 45KT 3919 7600 3887 7578 3837 7604
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PO1 follow-up statement
271
WWUS51 KPHI 010037
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
737 PM EST Tue Dec 31 2024
DEC001-003-005-MDC011-029-035-010047-
/O.CAN.KPHI.SV.W.0001.000000T0000Z-250101T0100Z/
Sussex DE-New Castle DE-Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
737 PM EST Tue Dec 31 2024
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTHWESTERN NEW
CASTLE...KENT...NORTHEASTERN QUEEN ANNE'S...CAROLINE AND NORTHEASTERN
KENT COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However small hail is
still possible with these thunderstorms.
LAT...LON 3865 7571 3869 7577 3870 7589 3884 7582
3932 7615 3937 7603 3936 7588 3938 7577
3946 7577 3952 7558 3931 7537 3939 7548
3939 7549 3927 7537 3905 7537 3890 7525
3856 7530 3846 7559 3846 7569
TIME...MOT...LOC 0034Z 232DEG 45KT 3934 7575 3902 7553 3852 7579
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 2:28 AM EST | Dense Fog Advisory | PHI | New Castle | 3 hr |
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.