Alert archive / Maryland / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 313, NWS Philadelphia/Mount Holly

August 20, 20264 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 20, 2026, 5:05 PM EDT for 4 counties in Maryland. It was in force for 40 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: Aug 20, 2026, 5:05 PM EDT (21:05 UTC)
Expired: Aug 20, 2026, 5:45 PM EDT
In force: 40 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 21:06 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 20, 5:41 PM EDT	TORNADO	2 W Barclay, MD	A brief tornado occurred near Barclay, snapping and uprooting several softwood and hardwood trees in a wooded area next to a residence located near the intersection of Dell Foxx Rd and Barclay Rd. The tornado then moved east across a bean field and onto a resi
Aug 20, 5:41 PM EDT	TORNADO	2 W Barclay, MD	A brief tornado occurred near Barclay, snapping and uprooting several softwood and hardwood trees in a wooded area next to a residence located near the intersection of Dell Foxx Rd and Barclay Rd. The tornado then moved east across a bean field and onto a resi

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 20, 2:31 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 20, 2:58 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 107 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: 97 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

697 
WUUS51 KPHI 202105
SVRPHI
MDC011-029-035-041-202145-
/O.NEW.KPHI.SV.W.0313.260820T2105Z-260820T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
505 PM EDT Thu Aug 20 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  North central Talbot County in eastern Maryland...
  Queen Anne's County in northeastern Maryland...
  North central Caroline County in eastern Maryland...
  Kent County in northeastern Maryland...

* Until 545 PM EDT.

* At 505 PM EDT, severe thunderstorms were located along a line
  extending from near Newtown to Rock Hall to Severn River, moving
  east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  Centerville, Chestertown, Centreville, Oakland, Rock Hall, Church
  Hill, Millington, Sudlersville, Queen Anne, Old Town, Grasonville,
  Starr, Jumptown, Newtown, and Morgnec.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.

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

A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.

&&

LAT...LON 3904 7630 3898 7628 3897 7622 3900 7616
      3903 7624 3909 7623 3915 7628 3929 7617
      3933 7617 3933 7576 3932 7576 3910 7575
      3889 7598 3892 7620 3896 7624 3892 7625
      3893 7631 3895 7631 3893 7632 3893 7636
TIME...MOT...LOC 2105Z 273DEG 27KT 3928 7622 3915 7625 3899 7647 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DeSilva

1 follow-up statement

831 
WWUS51 KPHI 202131
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
531 PM EDT Thu Aug 20 2026

MDC041-202141-
/O.CAN.KPHI.SV.W.0313.000000T0000Z-260820T2145Z/
Talbot MD-
531 PM EDT Thu Aug 20 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL TALBOT COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.

LAT...LON 3898 7626 3897 7622 3900 7616 3904 7624
      3912 7617 3933 7605 3933 7576 3910 7575
      3892 7596 3894 7609 3891 7612 3892 7620
      3894 7622 3894 7621 3895 7623 3897 7625
      3893 7626 3894 7626 3896 7628
TIME...MOT...LOC 2131Z 265DEG 26KT 3924 7601 3911 7604 3895 7626 

$$

MDC011-029-035-202145-
/O.CON.KPHI.SV.W.0313.000000T0000Z-260820T2145Z/
Queen Anne's MD-Caroline MD-Kent MD-
531 PM EDT Thu Aug 20 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR QUEEN ANNE'S...NORTH CENTRAL CAROLINE AND CENTRAL KENT
COUNTIES...

At 531 PM EDT, severe thunderstorms were located along a line
extending from Morgnec to Starkey Corner to near Chester, moving east
at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and power lines.

Locations impacted include...
Centerville, Chestertown, Centreville, Church Hill, Millington,
Sudlersville, Old Town, Grasonville, Starr, Jumptown, Overton,
Starkey Corner, Wye Mills, Morgnec, and Massey.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.

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

&&

LAT...LON 3898 7626 3897 7622 3900 7616 3904 7624
      3912 7617 3933 7605 3933 7576 3910 7575
      3892 7596 3894 7609 3891 7612 3892 7620
      3894 7622 3894 7621 3895 7623 3897 7625
      3893 7626 3894 7626 3896 7628
TIME...MOT...LOC 2131Z 265DEG 26KT 3924 7601 3911 7604 3895 7626 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DeSilva

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 2:43 PM EDT	Tornado Warning	PHI	Kent, Queen Anne's	32 min
Aug 20, 5:30 PM EDT	Tornado Warning	PHI	Kent, Queen Anne's	30 min
Aug 20, 5:39 PM EDT	Tornado Warning	PHI	Queen Anne's	36 min
Aug 20, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	50 min
Aug 20, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	39 min
Aug 20, 6:53 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Caroline, Queen Anne's	105 min
Aug 20, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	48 min

Nearby

Severe Thunderstorm Warnings in Maryland, 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.