Alert archive / Delaware / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 290, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 8, 2026, 1:44 PM EDT for 4 states. It was in force for 46 min. 6 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
- Aug 8, 2026, 1:44 PM EDT (17:44 UTC)
- Expired
- Aug 8, 2026, 2:30 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 Kent County, DE, New Castle County, DE, Kent County, MD, Queen Anne's County, MD, Gloucester County, NJ, Salem County, NJ, Chester County, PA
The radar
The Dover AFB radar (KDOX), 79 km from the middle of the area, began a volume at 17:45 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 |
|---|---|---|---|
| Aug 8, 1:53 PM EDT | MARINE TSTM WIND 48 | New Castle County Airpo, DE | |
| Aug 8, 2:00 PM EDT | TSTM WND DMG | Carneys Point Twp, NJ | Multiple large branches were blown down. Time estimated from radar. |
| Aug 8, 2:05 PM EDT | TSTM WND DMG | Oldmans Twp., NJ | A few trees blown down around Oldmans Township. Time estimated from radar. |
| Aug 8, 2:05 PM EDT | TSTM WND GST 62 | 1 Ene Carneys Point Twp, NJ | measured from a handheld anemometer. |
| Aug 8, 2:05 PM EDT | MARINE TSTM WIND 40 | Blackbird, DE | |
| Aug 8, 2:05 PM EDT | MARINE TSTM WIND 51 | Lower Alloways Creek, NJ |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 8, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.7 hours before the alert went out and 139 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
- 63 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted.
149
WUUS51 KPHI 081744
SVRPHI
DEC001-003-MDC029-035-NJC015-033-PAC029-081830-
/O.NEW.KPHI.SV.W.0290.260808T1744Z-260808T1830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
144 PM EDT Sat Aug 8 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
New Castle County in northern Delaware...
Northwestern Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Northern Kent County in northeastern Maryland...
Northwestern Salem County in southern New Jersey...
West central Gloucester County in southern New Jersey...
South central Chester County in southeastern Pennsylvania...
* Until 230 PM EDT.
* At 144 PM EDT, severe thunderstorms were located along a line
extending from Appleton to near Hollywood Beach to near Newtown,
moving east at 30 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, Middletown, Pennsville, Smyrna, Carneys Point,
Elsmere, New Castle, Penns Grove, Salem, Clayton, Swedesboro,
Delaware City, Newport, Millington, Betterton, Stanton, North Star,
Glasgow, and Bear.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 95 in Delaware between mile markers 1 and 19.
Interstate 295 in New Jersey between mile markers 0 and 12.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3929 7617 3931 7618 3934 7616 3933 7614
3937 7611 3937 7595 3936 7588 3938 7582
3938 7577 3972 7579 3973 7585 3979 7580
3979 7525 3946 7548 3919 7573 3927 7620
TIME...MOT...LOC 1744Z 279DEG 26KT 3970 7580 3951 7595 3933 7611
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS2 follow-up statements
796
WWUS51 KPHI 081811
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
211 PM EDT Sat Aug 8 2026
PAC029-081821-
/O.CAN.KPHI.SV.W.0290.000000T0000Z-260808T1830Z/
Chester PA-
211 PM EDT Sat Aug 8 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHESTER COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
central and northern Delaware...northeastern Maryland...and southern
New Jersey.
LAT...LON 3937 7591 3938 7577 3947 7577 3979 7547
3979 7525 3978 7525 3946 7548 3919 7573
3925 7606
TIME...MOT...LOC 1811Z 279DEG 25KT 3975 7545 3949 7570 3923 7603
$$
DEC001-003-MDC029-035-NJC015-033-081830-
/O.CON.KPHI.SV.W.0290.000000T0000Z-260808T1830Z/
New Castle DE-Kent DE-Queen Anne's MD-Kent MD-Salem NJ-Gloucester NJ-
211 PM EDT Sat Aug 8 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR SOUTHEASTERN NEW CASTLE...NORTHWESTERN KENT...NORTHEASTERN QUEEN
ANNE'S...NORTHEASTERN KENT...NORTHWESTERN SALEM AND WEST CENTRAL
GLOUCESTER COUNTIES...
At 211 PM EDT, severe thunderstorms were located along a line
extending from Penns Grove to Mount Pleasant to near Morgnec, moving
east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Middletown, Pennsville, Smyrna, Carneys Point, New
Castle, Penns Grove, Salem, Clayton, Swedesboro, Delaware City,
Millington, Hancocks Bridge, Port Penn, Morgnec, Delaney Corner,
Crumpton, Beckett, Saint Georges, and Sassafras.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 295 in New Jersey between mile markers 0 and 12.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3937 7591 3938 7577 3947 7577 3979 7547
3979 7525 3978 7525 3946 7548 3919 7573
3925 7606
TIME...MOT...LOC 1811Z 279DEG 25KT 3975 7545 3949 7570 3923 7603
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS974
WWUS51 KPHI 081823
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
223 PM EDT Sat Aug 8 2026
DEC001-003-MDC029-035-NJC015-033-081831-
/O.EXP.KPHI.SV.W.0290.000000T0000Z-260808T1830Z/
New Castle DE-Kent DE-Queen Anne's MD-Kent MD-Salem NJ-Gloucester NJ-
223 PM EDT Sat Aug 8 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NEW CASTLE...
NORTHWESTERN KENT...NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN KENT...
NORTHWESTERN SALEM AND WEST CENTRAL GLOUCESTER COUNTIES WILL EXPIRE
AT 230 PM EDT...
Most of storms which prompted the warning have weakened below severe
limits. Therefore, this warning will be allowed to expire. However,
storms are redeveloping in southern New Jersey, and a new Severe
Thunderstorm Warning is in effect for portions of Salem and
Gloucester Counties until 300 PM EDT.
A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
central and northern Delaware...northeastern Maryland...and southern
New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3937 7591 3938 7577 3947 7577 3979 7547
3979 7525 3978 7525 3946 7548 3919 7573
3925 7606
TIME...MOT...LOC 1821Z 279DEG 26KT 3974 7537 3948 7562 3922 7595
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| Aug 8, 12:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 50 min |
| Aug 8, 1:30 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 45 min |
| Aug 8, 1:21 PM EDT | Special Marine Warning | PHI | 84 min | |
| Aug 8, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Cumberland, Gloucester, Salem | 42 min |
| Aug 8, 2:50 PM EDT | Special Marine Warning | PHI | 40 min | |
| Aug 8, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 47 min |
| Aug 8, 2:59 PM EDT | Special Marine Warning | PHI | 70 min | |
| Aug 8, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Somerset | 53 min |
| Aug 8, 3:31 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 29 min |
| Aug 8, 3:44 PM EDT | Special Marine Warning | PHI | 36 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2026Severe Thunderstorm Warnings in Maryland, 2026Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.