Alert archive / Maryland / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 300, NWS Philadelphia/Mount Holly

August 10, 2026Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Sussex County, Delaware; 4 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2026, 5:36 PM EDT for Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Sussex County, Delaware; 4 counties in Maryland. It was in force for 39 min. 17 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 10, 2026, 5:36 PM EDT (21:36 UTC)
Expired: Aug 10, 2026, 6:15 PM EDT
In force: 39 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, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 51 km from the middle of the area, began a volume at 21:38 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 10, 5:38 PM EDT	TSTM WND DMG	Hope, MD	Tree down across the road and into wires near the intersection of Hayden Road and Church Hill Road. Time estimated from radar.
Aug 10, 5:38 PM EDT	TSTM WND DMG	Hope, MD	Tree down across the road and into wires near the intersection of Hayden Road and Church Hill Road. Time estimated from radar.
Aug 10, 5:38 PM EDT	TSTM WND DMG	Millington, MD	Trees down. Time estimated from radar.
Aug 10, 5:39 PM EDT	MARINE TSTM WIND 40	3 Ssw Cecilton, MD	35 kt peak gust at a personal weather station on the Sassafras River
Aug 10, 5:39 PM EDT	MARINE TSTM WIND 40	3 Ssw Cecilton, MD	A wind gust of 35 knots (40 MPH) was measured by a personal weather station (KMDGALEN26) adjacent to the Chesapeake Bay.
Aug 10, 5:39 PM EDT	MARINE TSTM WIND 47	3 Ssw Cecilton, MD	A wind gust of 41 knots (47 MPH) was measured by a mesonet on MD-213 at the tidal Sassafras River (MD039) adjacent to the Chesapeake Bay.
Aug 10, 5:41 PM EDT	TSTM WND DMG	2 N Skipton, MD	Wires down. Time estimated from radar.
Aug 10, 5:48 PM EDT	TSTM WND GST 70	Galena, MD	A 69.8 mph wind gust measured by a private weather station in Galena. Power is out.
Aug 10, 5:50 PM EDT	TSTM WND DMG	2 Se Skipton, MD	Tree down. Time estimated from radar.
Aug 10, 5:50 PM EDT	TSTM WND DMG	Galena, MD	Trees down. Time estimated from radar.
Aug 10, 5:50 PM EDT	TSTM WND DMG	Henderson, MD	Multiple trees down. Time estimated from radar.
Aug 10, 5:50 PM EDT	TSTM WND DMG	Middletown, DE	Wires down. Time estimated from radar.
Aug 10, 5:55 PM EDT	TSTM WND GST 55	2 N Harmony, MD	Mesonet station EW4458 Preston.
Aug 10, 6:08 PM EDT	TSTM WND DMG	Camden, DE	Tree and wires down. Time estimated from radar.
Aug 10, 6:13 PM EDT	TSTM WND GST 58	1 Ne Magnolia, DE	Mesonet station DEL17 Sr1 At Trap Shooters Rd.
Aug 10, 6:20 PM EDT	TSTM WND DMG	2 S American Corner, MD	Multiple trees down. Time estimated from radar.
Aug 10, 6:20 PM EDT	MARINE TSTM WIND 41	1 N Dover Air Force Bas, DE

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 10, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.6 hours before the alert went out and 122 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 682 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1254 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

As transmitted.

056 
WUUS51 KPHI 102136
SVRPHI
DEC001-003-005-MDC011-029-035-041-NJC011-033-102215-
/O.NEW.KPHI.SV.W.0300.260810T2136Z-260810T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
536 PM EDT Mon Aug 10 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Sussex County in southern Delaware...
  Southwestern New Castle County in northern Delaware...
  Kent County in central Delaware...
  Talbot County in eastern Maryland...
  Queen Anne's County in northeastern Maryland...
  Caroline County in eastern Maryland...
  Northeastern Kent County in northeastern Maryland...
  West central Cumberland County in southern New Jersey...
  Southwestern Salem County in southern New Jersey...

* Until 615 PM EDT.

* At 535 PM EDT, severe thunderstorms were located along a line
  extending from Hollywood Beach to Church Hill to near Grasonville
  to Deale, moving east at 35 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...
  Dover, Middletown, Easton, Centerville, Talbot, Smyrna, Milford,
  Denton, Centreville, Harrington, Camden, Clayton, Federalsburg,
  Bridgeville, Greensboro, Oakland, Ridgely, Cheswold, Trappe, and
  St. Michaels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3888 7637 3883 7631 3890 7630 3889 7630
      3879 7622 3879 7620 3892 7627 3914 7602
      3937 7600 3938 7577 3955 7578 3947 7527
      3926 7529 3939 7547 3901 7531 3877 7550
      3857 7603 3877 7624 3867 7634 3868 7634
TIME...MOT...LOC 2135Z 288DEG 31KT 3950 7593 3913 7596 3894 7615 3879
7651

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

2 follow-up statements

226 
WWUS51 KPHI 102203
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
603 PM EDT Mon Aug 10 2026

NJC033-102213-
/O.CAN.KPHI.SV.W.0300.000000T0000Z-260810T2215Z/
Salem NJ-
603 PM EDT Mon Aug 10 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SALEM 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 900 PM EDT for
central, northern and southern Delaware...eastern and northeastern
Maryland...and southern New Jersey.

LAT...LON 3883 7600 3902 7581 3946 7577 3938 7535
      3931 7536 3939 7548 3916 7537 3891 7539
      3877 7551 3868 7575 3868 7580 3871 7584
      3870 7590 3866 7596 3860 7599 3857 7603
      3874 7620
TIME...MOT...LOC 2203Z 295DEG 31KT 3938 7576 3901 7580 3883 7599 3868
7635

$$

DEC001-003-005-MDC011-029-035-041-NJC011-102215-
/O.CON.KPHI.SV.W.0300.000000T0000Z-260810T2215Z/
Sussex DE-New Castle DE-Kent DE-Talbot MD-Queen Anne's MD-
Caroline MD-Kent MD-Cumberland NJ-
603 PM EDT Mon Aug 10 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN SUSSEX...SOUTHWESTERN NEW CASTLE...KENT...
SOUTHEASTERN TALBOT...NORTHEASTERN QUEEN ANNE'S...CAROLINE...
NORTHEASTERN KENT AND WEST CENTRAL CUMBERLAND COUNTIES...

At 603 PM EDT, severe thunderstorms were located along a line
extending from near Sassafras to Goldsboro to Matthews to near
Tilghman Island, moving southeast at 35 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...
Dover, Middletown, Easton, Smyrna, Milford, Denton, Harrington,
Camden, Clayton, Federalsburg, Bridgeville, Greensboro, Ridgely,
Cheswold, Trappe, Preston, Bowers, Goldsboro, Woodside, and Viola.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3883 7600 3902 7581 3946 7577 3938 7535
      3931 7536 3939 7548 3916 7537 3891 7539
      3877 7551 3868 7575 3868 7580 3871 7584
      3870 7590 3866 7596 3860 7599 3857 7603
      3874 7620
TIME...MOT...LOC 2203Z 295DEG 31KT 3938 7576 3901 7580 3883 7599 3868
7635

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

277 
WWUS51 KPHI 102207
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
607 PM EDT Mon Aug 10 2026

DEC001-003-005-MDC011-029-035-041-NJC011-102217-
/O.EXP.KPHI.SV.W.0300.000000T0000Z-260810T2215Z/
Sussex DE-New Castle DE-Kent DE-Talbot MD-Queen Anne's MD-
Caroline MD-Kent MD-Cumberland NJ-
607 PM EDT Mon Aug 10 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX...
SOUTHWESTERN NEW CASTLE...KENT...SOUTHEASTERN TALBOT...NORTHEASTERN
QUEEN ANNE'S...CAROLINE...NORTHEASTERN KENT AND WEST CENTRAL
CUMBERLAND COUNTIES WILL EXPIRE AT 615 PM EDT...

The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central, northern and southern Delaware...eastern and 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 3883 7600 3902 7581 3946 7577 3938 7535
      3931 7536 3939 7548 3916 7537 3891 7539
      3877 7551 3868 7575 3868 7580 3871 7584
      3870 7590 3866 7596 3860 7599 3857 7603
      3874 7620
TIME...MOT...LOC 2207Z 288DEG 31KT 3938 7576 3901 7580 3883 7599 3868
7635

$$

MPS

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 4:02 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	43 min
Aug 10, 5:38 PM EDT	Special Marine Warning	PHI		97 min
Aug 10, 6:22 PM EDT	Special Marine Warning	PHI		68 min
Aug 10, 6:49 PM EDT	Special Marine Warning	PHI		56 min
Aug 10, 7:02 PM EDT	Special Marine Warning	PHI		58 min
Aug 10, 7:49 PM EDT	Special Marine Warning	PHI		56 min
Aug 10, 7:51 PM EDT	Special Marine Warning	PHI		54 min
Aug 10, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	66 min
Aug 10, 4:46 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	20 min
Aug 10, 6:07 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle, Sussex	38 min
Aug 10, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	23 min
Aug 10, 7:04 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	41 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2026 Severe Thunderstorm Warnings in Delaware, 2026 Severe Thunderstorm Warnings in New Jersey, 2026 Every 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.