Alert archive / Delaware / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 59, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 31, 2025, 2:00 PM EDT for Caroline County, Maryland; Kent County, Sussex County, Delaware. 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
- May 31, 2025, 2:00 PM EDT (18:00 UTC)
- Expired
- May 31, 2025, 2:45 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, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 11 km from the middle of the area, began a volume at 18:03 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 |
|---|---|---|---|
| May 31, 2:23 PM EDT | HAIL 0.5 | Houston, DE | Report of pea to half inch size hail. |
| May 31, 2:47 PM EDT | MARINE TSTM WIND 44 | 2 Wnw Lewes, DE | Mesonet station XLEW Lewes. |
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, 6.0 hours before the alert went out and 98 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 974 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- -32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
917
WUUS51 KPHI 311800
SVRPHI
DEC001-005-MDC011-311845-
/O.NEW.KPHI.SV.W.0059.250531T1800Z-250531T1845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
200 PM EDT Sat May 31 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern Sussex County in southern Delaware...
Southern Kent County in central Delaware...
Southeastern Caroline County in eastern Maryland...
* Until 245 PM EDT.
* At 200 PM EDT, a severe thunderstorm was located near Andrewsville,
or 17 miles northeast of Hurlock, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Georgetown, Milford, Denton, Harrington, Lewes, Milton,
Bridgeville, Ellendale, Henlopen Acres, Smithville, Cape Henlopen
State Park, Agner, Andrewsville, Harmony, Greenwood, Houston, Dewey
Beach, and Farmington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3872 7588 3893 7588 3898 7510 3867 7506
TIME...MOT...LOC 1800Z 275DEG 31KT 3885 7573
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PF2 follow-up statements
120
WWUS51 KPHI 311819
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
219 PM EDT Sat May 31 2025
MDC011-311829-
/O.CAN.KPHI.SV.W.0059.000000T0000Z-250531T1845Z/
Caroline MD-
219 PM EDT Sat May 31 2025
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CAROLINE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3868 7529 3871 7564 3894 7563 3898 7510
3867 7506
TIME...MOT...LOC 1819Z 275DEG 34KT 3881 7548
$$
DEC001-005-311845-
/O.CON.KPHI.SV.W.0059.000000T0000Z-250531T1845Z/
Sussex DE-Kent DE-
219 PM EDT Sat May 31 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTHERN SUSSEX AND SOUTHEASTERN KENT COUNTIES...
At 219 PM EDT, a severe thunderstorm was located over Ellendale, or 9
miles northwest of Georgetown, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Milford, Harrington, Lewes, Milton, Bridgeville,
Ellendale, Henlopen Acres, Cape Henlopen State Park, Greenwood,
Houston, Dewey Beach, and Farmington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3868 7529 3871 7564 3894 7563 3898 7510
3867 7506
TIME...MOT...LOC 1819Z 275DEG 34KT 3881 7548
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PF837
WWUS51 KPHI 311838
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
238 PM EDT Sat May 31 2025
DEC001-005-311847-
/O.EXP.KPHI.SV.W.0059.000000T0000Z-250531T1845Z/
Sussex DE-Kent DE-
238 PM EDT Sat May 31 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SUSSEX AND
SOUTHEASTERN KENT COUNTIES WILL EXPIRE AT 245 PM EDT...
The storm which prompted the warning is moving out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3868 7529 3871 7564 3894 7563 3898 7510
3867 7506
TIME...MOT...LOC 1837Z 275DEG 31KT 3880 7533
$$
PFThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:57 PM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 33 min |
| May 30, 9:04 PM EDT | Wind Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 10 hr |
| May 30, 9:33 PM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 27 min |
| May 30, 10:26 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 49 min |
| May 31, 1:17 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 43 min |
| May 31, 1:30 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 45 min |
| May 31, 1:42 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 48 min |
| May 30, 10:26 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| May 30, 10:55 PM EDT | Tornado Warning | PHI | New Castle | 22 min |
| May 31, 2:26 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 49 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.