Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 97, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 26, 2025, 7:14 PM EDT for New Castle County, Delaware; Chester County, Delaware County, Pennsylvania. It was in force for 46 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 26, 2025, 7:14 PM EDT (23:14 UTC)
- Expired
- Jun 26, 2025, 8:00 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Chester County, PA, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 103 km from the middle of the area, began a volume at 23:13 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 26, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.2 hours before the alert went out and 159 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
- 437 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1094 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
524
WUUS51 KPHI 262314
SVRPHI
DEC003-PAC029-045-270000-
/O.NEW.KPHI.SV.W.0097.250626T2314Z-250627T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
714 PM EDT Thu Jun 26 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern New Castle County in northern Delaware...
Southwestern Chester County in southeastern Pennsylvania...
Western Delaware County in southeastern Pennsylvania...
* Until 800 PM EDT.
* At 713 PM EDT, a severe thunderstorm was located over Landenberg,
or 7 miles north of Newark, moving southeast at 25 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, Newark, Pennsville, Elsmere, Kennett Square, New
Castle, Oxford, West Grove, Delaware City, Newport, Glen Roy,
Stanton, North Star, Glasgow, Bear, Talleyville, Port Penn,
Wilmington Manor, Pike Creek, and Ashland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3973 7610 3974 7609 3976 7606 3979 7605
3996 7574 3984 7554 3964 7554 3962 7556
3959 7554 3950 7554 3951 7578 3972 7579
3972 7613
TIME...MOT...LOC 2313Z 314DEG 22KT 3978 7578
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DeSilva3 follow-up statements
196
WWUS51 KPHI 262336
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
736 PM EDT Thu Jun 26 2025
PAC045-262346-
/O.CAN.KPHI.SV.W.0097.000000T0000Z-250627T0000Z/
Delaware PA-
736 PM EDT Thu Jun 26 2025
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN DELAWARE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Delaware...southern New Jersey...and southeastern
Pennsylvania.
LAT...LON 3973 7610 3977 7605 3979 7555 3964 7555
3963 7556 3959 7554 3950 7554 3951 7578
3972 7579 3972 7612 3973 7612
TIME...MOT...LOC 2336Z 335DEG 21KT 3965 7574
$$
DEC003-PAC029-270000-
/O.CON.KPHI.SV.W.0097.000000T0000Z-250627T0000Z/
New Castle DE-Chester PA-
736 PM EDT Thu Jun 26 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHWESTERN NEW CASTLE AND SOUTH CENTRAL CHESTER COUNTIES...
At 736 PM EDT, a severe thunderstorm was located over Newark, moving
southeast at 25 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, Newark, Elsmere, New Castle, Delaware City, Newport,
Saint Georges, Glen Roy, Mount Pleasant, Greenville, Stanton, North
Star, Glasgow, Bear, Landenberg, Port Penn, Wilmington Manor, Pike
Creek, Kemblesville, and Hockessin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3973 7610 3977 7605 3979 7555 3964 7555
3963 7556 3959 7554 3950 7554 3951 7578
3972 7579 3972 7612 3973 7612
TIME...MOT...LOC 2336Z 335DEG 21KT 3965 7574
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DeSilva582
WWUS51 KPHI 262347
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
747 PM EDT Thu Jun 26 2025
PAC029-262356-
/O.CAN.KPHI.SV.W.0097.000000T0000Z-250627T0000Z/
Chester PA-
747 PM EDT Thu Jun 26 2025
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHESTER COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Delaware...and southern New Jersey.
LAT...LON 3972 7579 3973 7556 3965 7555 3963 7556
3959 7554 3950 7554 3951 7578 3965 7579
TIME...MOT...LOC 2346Z 330DEG 20KT 3960 7567
$$
DEC003-270000-
/O.CON.KPHI.SV.W.0097.000000T0000Z-250627T0000Z/
New Castle DE-
747 PM EDT Thu Jun 26 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHWESTERN NEW CASTLE COUNTY...
At 746 PM EDT, a severe thunderstorm was located over Bear, or 7
miles southeast of Newark, moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Newark, New Castle, Delaware City, Newport, Saint Georges, Mount
Pleasant, Stanton, Glasgow, Bear, Port Penn, Wilmington Manor, Pike
Creek, and Brookside.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3972 7579 3973 7556 3965 7555 3963 7556
3959 7554 3950 7554 3951 7578 3965 7579
TIME...MOT...LOC 2346Z 330DEG 20KT 3960 7567
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DeSilva450
WWUS51 KPHI 262353
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
753 PM EDT Thu Jun 26 2025
DEC003-270003-
/O.EXP.KPHI.SV.W.0097.000000T0000Z-250627T0000Z/
New Castle DE-
753 PM EDT Thu Jun 26 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NEW CASTLE COUNTY
WILL EXPIRE AT 800 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Delaware...and southern New Jersey.
LAT...LON 3972 7579 3973 7556 3965 7555 3963 7556
3959 7554 3950 7554 3951 7578 3965 7579
TIME...MOT...LOC 2353Z 314DEG 22KT 3959 7565
$$
DeSilvaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 4:25 AM EDT | Coastal Flood Advisory | PHI | Kent, New Castle, Sussex | 23 hr |
| Jun 26, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 40 min |
| Jun 26, 7:27 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jun 26, 12:24 PM EDT | Flood Watch | PHI | Berks, Carbon, Chester, Lehigh | 11 hr |
| Jun 26, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 42 min |
| Jun 26, 4:20 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 40 min |
| Jun 26, 4:31 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 44 min |
| Jun 26, 5:45 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 45 min |
| Jun 26, 6:21 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Jun 26, 6:29 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 46 min |
| Jun 26, 6:49 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Jun 26, 6:54 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 36 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2025Severe 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.