Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 282, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2026, 4:56 PM EDT for New Castle County, Delaware; Chester County, Delaware County, Pennsylvania. It was in force for 64 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
- Aug 7, 2026, 4:56 PM EDT (20:56 UTC)
- Expired
- Aug 7, 2026, 6:00 PM EDT
- In force
- 64 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 Philadelphia radar (KDIX), 113 km from the middle of the area, began a volume at 20:55 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 |
|---|---|---|---|
| Aug 7, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 174 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
- 514 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1052 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
891
WUUS51 KPHI 072056
SVRPHI
DEC003-PAC029-045-072200-
/O.NEW.KPHI.SV.W.0282.260807T2056Z-260807T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
456 PM EDT Fri Aug 7 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern New Castle County in northern Delaware...
Southeastern Chester County in southeastern Pennsylvania...
Southwestern Delaware County in southeastern Pennsylvania...
* Until 600 PM EDT.
* At 455 PM EDT, a severe thunderstorm was located over West Grove,
or 10 miles northwest of Newark, moving east at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Wilmington, Newark, West Chester, Coatesville, Westtown, Carneys
Point, Elsmere, Kennett Square, Penns Grove, Parkesburg, West
Grove, Newport, Arden, Cochranville, Stanton, Cheyney, North Star,
Talleyville, Elam, and Marshallton.
This includes Interstate 95 in Delaware between mile markers 11 and
23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to damaging winds, frequent cloud to ground lightning is
occurring with this storm. Move indoors immediately. Remember, if
you can hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 3998 7592 4002 7543 3974 7546 3970 7550
3971 7579 3972 7579 3972 7595
TIME...MOT...LOC 2055Z 269DEG 18KT 3982 7584
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse3 follow-up statements
825
WWUS51 KPHI 072111
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
511 PM EDT Fri Aug 7 2026
DEC003-PAC029-045-072200-
/O.CON.KPHI.SV.W.0282.000000T0000Z-260807T2200Z/
New Castle DE-Chester PA-Delaware PA-
511 PM EDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHERN NEW CASTLE...SOUTHEASTERN CHESTER AND SOUTHWESTERN
DELAWARE COUNTIES...
At 511 PM EDT, a severe thunderstorm was located over West Grove, or
10 miles north of Newark, moving east at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Newark, West Chester, Coatesville, Westtown, Elsmere,
Kennett Square, Parkesburg, West Grove, Newport, Arden, Stanton,
Cheyney, North Star, Talleyville, Elam, Marshallton, Pike Creek,
Chelsea, and Ashland.
This includes Interstate 95 in Delaware between mile markers 11 and
22.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3998 7591 4002 7543 3976 7546 3970 7550
3971 7579 3972 7579 3972 7593
TIME...MOT...LOC 2111Z 267DEG 17KT 3983 7578
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse538
WWUS51 KPHI 072135
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
535 PM EDT Fri Aug 7 2026
DEC003-PAC029-045-072200-
/O.CON.KPHI.SV.W.0282.000000T0000Z-260807T2200Z/
New Castle DE-Chester PA-Delaware PA-
535 PM EDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHERN NEW CASTLE...SOUTHEASTERN CHESTER AND SOUTHWESTERN
DELAWARE COUNTIES...
At 535 PM EDT, a severe thunderstorm was located over Greenville, or
near Wilmington, moving east at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Newark, Westtown, Elsmere, Kennett Square, Newport,
Arden, Stanton, Cheyney, North Star, Talleyville, Elam, Pike Creek,
Chelsea, Ashland, Gradyville, Greenville, Concordville, Hockessin,
and Lima.
This includes Interstate 95 in Delaware between mile markers 11 and
21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3993 7570 3996 7544 3976 7546 3970 7550
3971 7577
TIME...MOT...LOC 2135Z 270DEG 18KT 3978 7559
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse765
WWUS51 KPHI 072151
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
551 PM EDT Fri Aug 7 2026
DEC003-PAC029-045-072200-
/O.CON.KPHI.SV.W.0282.000000T0000Z-260807T2200Z/
New Castle DE-Chester PA-Delaware PA-
551 PM EDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHEASTERN NEW CASTLE...SOUTHEASTERN CHESTER AND SOUTHWESTERN
DELAWARE COUNTIES...
At 550 PM EDT, a severe thunderstorm was located over Arden, or near
Wilmington, moving east at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Westtown, Elsmere, Newport, Arden, Gradyville,
Greenville, Cheyney, Talleyville, Elam, Concordville, Chelsea, Lima,
Chester Heights, Bellefonte, Ardentown, Ardencroft, Edgemoor,
Claymont, and Boothwyn.
This includes Interstate 95 in Delaware between mile markers 11 and
21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3994 7560 3996 7544 3976 7546 3970 7550
3970 7561
TIME...MOT...LOC 2150Z 269DEG 18KT 3978 7549
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 50 min |
| Aug 7, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 67 min |
| Aug 7, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 62 min |
| Aug 7, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 44 min |
| Aug 7, 3:25 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 7, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 65 min |
| Aug 7, 3:37 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Aug 7, 4:04 PM EDT | Flash Flood Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 2 hr |
| Aug 7, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Monroe, Northampton | 54 min |
| Aug 7, 4:24 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 4 hr |
| Aug 7, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 55 min |
| Aug 7, 5:01 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 3 hr |
| Aug 7, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 44 min |
| Aug 7, 5:34 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Aug 7, 7:19 PM EDT | Areal Flood Warning | PHI | Monroe, Northampton | 4 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2026Severe Thunderstorm Warnings in Delaware, 2026Every severe thunderstorm warning in 2026
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.