Alert archive / Maryland / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 255, NWS Philadelphia/Mount Holly

July 29, 20234 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2023, 5:02 PM EDT for 4 counties in Maryland. It was in force for 73 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: Jul 29, 2023, 5:02 PM EDT (21:02 UTC)
Expired: Jul 29, 2023, 6:15 PM EDT
In force: 73 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

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

The radar

The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 21:05 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
Jul 29, 5:19 PM EDT	TSTM WND DMG	Stevensville, MD	Tree down at Kent Island High School. Time estimated from radar.
Jul 29, 5:19 PM EDT	TSTM WND DMG	Stevensville, MD	Tree down at Kent Island High School. Time estimated from radar.
Jul 29, 5:24 PM EDT	TSTM WND GST 61	1 Wnw Bozman, MD	Wunderground station KMDWITTM5.
Jul 29, 5:24 PM EDT	TSTM WND GST 70	6 Nw Talbot, MD	Wunderground station KMDSTEVE76.
Jul 29, 5:24 PM EDT	TSTM WND GST 70	6 Nw Talbot, MD	Wunderground station KMDSTEVE76.
Jul 29, 5:29 PM EDT	TSTM WND GST 58	10 E North Beach, MD	Wind gusts of up to 50 knots (58 MPH) were measured by a mesonet on the MD-33 Knapps Narrows Drawbridge (MD073) between 5:29 and 5:54 PM.
Jul 29, 5:33 PM EDT	TSTM WND DMG	2 Ene Copperville, MD	Tree down on Todds Corner Road. Time estimated from radar.
Jul 29, 5:34 PM EDT	TSTM WND GST 58	Tilghman, MD	Mesonet station MD073 Md-33 At Knapps Narrows Drawbrid.
Jul 29, 5:38 PM EDT	TSTM WND DMG	1 Sse Easton, MD	Power lines and wires down on Elm Avenue and Wayside Avenue in Easton. Time estimated from radar.
Jul 29, 5:38 PM EDT	TSTM WND DMG	3 Nw Hambleton, MD	Trees down on Baileys Neck Road southwest of Easton. Time estimated from radar.
Jul 29, 5:40 PM EDT	TSTM WND DMG	2 Se Easton, MD	Tree down on Jefferys Way in Easton. Time estimated from radar.
Jul 29, 5:44 PM EDT	TSTM WND GST 56	Carville, MD	MDDOT gauge on US 301 at MD 305.
Jul 29, 5:44 PM EDT	TSTM WND GST 56	Carville, MD	Wind gust to 56 mph recorded by the MD DOT station at the intersection of US 301 and MD 305.
Jul 29, 5:44 PM EDT	TSTM WND GST 56	Carville, MD	MDDOT gauge on US 301 at MD 305.
Jul 29, 5:44 PM EDT	TSTM WND GST 56	Carville, MD	Wind gust to 56 mph recorded by the MD DOT station at the intersection of US 301 and MD 305.
Jul 29, 5:49 PM EDT	TSTM WND GST 61	Tilghman Island, MD	Wunderground station KMDTILGH14.
Jul 29, 6:03 PM EDT	TSTM WND DMG	2 N Smithville, MD	Several large branches blown down on Nobel and Breeding Road. Time estimated from radar.

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
Jul 29, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.0 hours before the alert went out and 105 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: 87 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1163 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

013 
WUUS51 KPHI 292102
SVRPHI
MDC011-029-035-041-292215-
/O.NEW.KPHI.SV.W.0255.230729T2102Z-230729T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
502 PM EDT Sat Jul 29 2023

The National Weather Service in Mount Holly NJ has issued a

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

* Until 615 PM EDT.

* At 501 PM EDT, severe thunderstorms were located along a line
  extending from Arnold to near Bowie to Crystal City, moving east 
  at 35 mph. This line of storms has a history of producing wind 
  damage across the DC metro area.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Easton, Centerville, Talbot, Denton, Centreville, Greensboro,
  Oakland, Ridgely, Rock Hall, Trappe, St. Michaels, Church Hill,
  Preston, Oxford, Goldsboro, Queen Anne, Smithville, Old Town,
  Grasonville and Starr.

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.

&&

LAT...LON 3897 7625 3896 7631 3884 7637 3918 7627
      3915 7575 3876 7572 3857 7603 3868 7621
      3876 7622 3871 7628 3878 7629 3876 7632
      3867 7634 3877 7638
TIME...MOT...LOC 2101Z 287DEG 32KT 3906 7651 3892 7672 3886 7707 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Staarmann

4 follow-up statements

674 
WWUS51 KPHI 292121
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
521 PM EDT Sat Jul 29 2023

MDC011-029-035-041-292215-
/O.CON.KPHI.SV.W.0255.000000T0000Z-230729T2215Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
521 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR TALBOT...QUEEN ANNE'S...CAROLINE AND SOUTHWESTERN KENT
COUNTIES...

At 520 PM EDT, severe thunderstorms were located along a line
extending from Stevensville to Shady Side to Andrews Air Force Base, 
moving east at 40 mph. This line of storms has a history of 
producing wind damage across the DC metro.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Easton, Centerville, Talbot, Denton, Centreville, Greensboro,
Oakland, Ridgely, Rock Hall, Trappe, St. Michaels, Church Hill,
Preston, Oxford, Goldsboro, Queen Anne, Smithville, Old Town,
Grasonville and Starr.

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 these storms.
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 3897 7625 3896 7631 3884 7637 3918 7627
      3915 7575 3876 7572 3857 7603 3868 7621
      3876 7622 3871 7628 3878 7629 3876 7632
      3867 7634 3877 7638
TIME...MOT...LOC 2120Z 289DEG 34KT 3902 7633 3883 7649 3882 7688 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Staarmann

411 
WWUS51 KPHI 292130
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
530 PM EDT Sat Jul 29 2023

MDC011-029-035-041-292215-
/O.CON.KPHI.SV.W.0255.000000T0000Z-230729T2215Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
530 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR TALBOT...QUEEN ANNE'S...CAROLINE AND SOUTHWESTERN KENT
COUNTIES...

At 529 PM EDT, severe thunderstorms were located along a line
extending from Overton to near Kent Point to near Marlton, moving 
east at 40 mph. This line of storms has a history of producing wind 
damage across the DC metro.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated. At 528 PM EDT, a 59 mph wind gust was 
         reported on Poplar Island.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Easton, Centerville, Talbot, Denton, Centreville, Greensboro,
Oakland, Ridgely, Rock Hall, Trappe, St. Michaels, Church Hill,
Preston, Oxford, Goldsboro, Queen Anne, Smithville, Old Town,
Grasonville and Starr.

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 these storms.
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 3897 7625 3896 7631 3884 7637 3918 7627
      3915 7575 3876 7572 3857 7603 3868 7621
      3876 7622 3871 7628 3878 7629 3876 7632
      3867 7634 3877 7638
TIME...MOT...LOC 2129Z 288DEG 34KT 3903 7621 3880 7638 3874 7673 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Staarmann

184 
WWUS51 KPHI 292155
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
555 PM EDT Sat Jul 29 2023

MDC029-292205-
/O.CAN.KPHI.SV.W.0255.000000T0000Z-230729T2215Z/
Kent MD-
555 PM EDT Sat Jul 29 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KENT 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
eastern and northeastern Maryland.

LAT...LON 3897 7625 3916 7594 3915 7575 3876 7572
      3857 7603 3868 7621 3876 7622 3871 7628
      3878 7629 3876 7632 3867 7634 3877 7638
TIME...MOT...LOC 2155Z 286DEG 32KT 3904 7584 3874 7612 3868 7647 

$$

MDC011-035-041-292215-
/O.CON.KPHI.SV.W.0255.000000T0000Z-230729T2215Z/
Talbot MD-Queen Anne's MD-Caroline MD-
555 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR TALBOT...CENTRAL QUEEN ANNE'S AND CAROLINE COUNTIES...

At 555 PM EDT, severe thunderstorms were located along a line
extending from near Goldsboro to near Easton to near Chesapeake
Beach, moving east at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Easton, Centerville, Talbot, Denton, Centreville, Greensboro,
Oakland, Ridgely, Trappe, St. Michaels, Preston, Oxford, Goldsboro,
Queen Anne, Smithville, Grasonville, Starr, Copperville, Jumptown and
Agner.

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 these storms.
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 3897 7625 3916 7594 3915 7575 3876 7572
      3857 7603 3868 7621 3876 7622 3871 7628
      3878 7629 3876 7632 3867 7634 3877 7638
TIME...MOT...LOC 2155Z 286DEG 32KT 3904 7584 3874 7612 3868 7647 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Staarmann

792 
WWUS51 KPHI 292205
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
605 PM EDT Sat Jul 29 2023

MDC035-292215-
/O.CAN.KPHI.SV.W.0255.000000T0000Z-230729T2215Z/
Queen Anne's MD-
605 PM EDT Sat Jul 29 2023

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL QUEEN ANNE'S 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
eastern and northeastern Maryland.

LAT...LON 3883 7630 3885 7627 3879 7620 3886 7620
      3888 7611 3895 7607 3892 7595 3909 7585
      3914 7575 3876 7572 3870 7582 3868 7593
      3857 7603 3868 7621 3876 7622 3871 7628
      3878 7629 3876 7631 3867 7634 3875 7637
TIME...MOT...LOC 2205Z 287DEG 32KT 3902 7575 3872 7603 3866 7638 

$$

MDC011-041-292215-
/O.CON.KPHI.SV.W.0255.000000T0000Z-230729T2215Z/
Talbot MD-Caroline MD-
605 PM EDT Sat Jul 29 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR TALBOT AND CAROLINE COUNTIES...

At 605 PM EDT, severe thunderstorms were located along a line
extending from Sandtown to near Hambleton to 6 miles south of
Tilghman Island, moving east at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Easton, Talbot, Denton, Greensboro, Oakland, Ridgely, Trappe, St.
Michaels, Preston, Oxford, Goldsboro, Queen Anne, Smithville,
Copperville, Jumptown, Agner, Choptank, Windyhill, Tanyard and
Harmony.

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 these storms.
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.

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

&&

LAT...LON 3883 7630 3885 7627 3879 7620 3886 7620
      3888 7611 3895 7607 3892 7595 3909 7585
      3914 7575 3876 7572 3870 7582 3868 7593
      3857 7603 3868 7621 3876 7622 3871 7628
      3878 7629 3876 7631 3867 7634 3875 7637
TIME...MOT...LOC 2205Z 287DEG 32KT 3902 7575 3872 7603 3866 7638 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:18 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	42 min
Jul 28, 9:30 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	45 min
Jul 28, 10:07 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	38 min
Jul 28, 10:44 PM EDT	Severe Thunderstorm Warning	PHI	Kent	31 min
Jul 28, 11:00 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	60 min
Jul 28, 11:33 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	27 min
Jul 29, 12:12 AM EDT	Severe Thunderstorm Warning	PHI	Caroline	36 min
Jul 29, 5:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, Queen Anne's	60 min
Jul 29, 5:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline, Kent, Queen Anne's	46 min
Jul 29, 6:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline	75 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2023 Every severe thunderstorm warning in 2023

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.