Alert archive / Maryland / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 121, NWS Philadelphia/Mount Holly

July 12, 20224 counties in Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 12, 2022, 7:12 PM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 48 min. 10 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 12, 2022, 7:12 PM EDT (23:12 UTC)
Expired: Jul 12, 2022, 8:00 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Dover AFB radar (KDOX), 51 km from the middle of the area, began a volume at 23:13 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 12, 7:24 PM EDT	TSTM WND DMG	3 Ssw Denton, MD	LARGE TREES DOWN AND A LIMB INTO A CAR WINDSHIELD ON PEALIQUOR ROAD. PICTURES PROVIDED VIA SOCIAL MEDIA. TIME ESTIMATED VIA RADAR.
Jul 12, 7:29 PM EDT	TSTM WND DMG	2 S Denton, MD	* 1 INJ * PHOTO OF A CAMPER SIGNIFICANTLY DAMAGED BY A FALLEN TREE AT THE MARTINAK STATE PARK CAMPGROUND. THIS RESULTED IN ONE INJURY TO AN OCCUPANT. TIME ESTIMATED FROM RADAR.
Jul 12, 7:29 PM EDT	TSTM WND GST 55	1 Sse Denton, MD	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 1 SSE DENTON. WUNDERGROUND GAUGE KMDDENTO35 MEASURED WIND GUST.
Jul 12, 7:29 PM EDT	TSTM WND GST 55	1 Sse Denton, MD	WUNDERGROUND GAUGE KMDDENTO35 MEASURED WIND GUST.
Jul 12, 7:29 PM EDT	TSTM WND GST 70	1 Ssw Denton, MD	CORRECTS TIME FROM PREVIOUS TSTM WND GST REPORT FROM 1 SSW DENTON. WUNDERGROUND GAUGE KMDDENTO27 MEASURED WIND GUST.
Jul 12, 7:34 PM EDT	TSTM WND DMG	4 W Andrewsville, DE	CALLER REPORTS WIDESPREAD DAMAGE INCLUDING NUMEROUS LARGE TREES DOWN. TIME ESTIMATED VIA RADAR.
Jul 12, 7:38 PM EDT	TSTM WND DMG	2 W Andrewsville, DE	REPORT OF ROOF BLOWN OFF OF A HOUSE ALONG CATTAIL BRANCH ROAD. RADAR INDICATES THIS WAS FROM A MICROBURST WITH WINDS POTENTIALLY IN EXCESS OF 80 MPH. TIME ESTIMATED FROM RADAR.
Jul 12, 7:42 PM EDT	TSTM WND DMG	1 Ese Andrewsville, DE	NUMEROUS TREES DOWN MAKING ANDREWVILLE ROAD IMPASSIBLE WEST OF FARMINGTON. TIME ESTIMATED FROM RADAR.
Jul 12, 7:44 PM EDT	TSTM WND DMG	1 Nne Andrewsville, DE	REPORTS OF A STRUCTURE COLLAPSE AND ROOFS BLOWN OFF OF CHICKEN HOUSES ON PROSPECT CHURCH ROAD. TIME ESTIMATED VIA RADAR.
Jul 12, 7:44 PM EDT	TSTM WND DMG	2 N Andrewsville, DE	SOCIAL MEDIA REPORT OF LARGE TREES UPROOTED AND MULTIPLE LARGE BRANCHES DOWN ON PROSPECT CHURCH ROAD. TIME ESTIMATED VIA 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 12, 5:05 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.2 hours before the alert went out and 115 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

813 
WUUS51 KPHI 122312
SVRPHI
DEC001-005-MDC011-029-035-041-130000-
/O.NEW.KPHI.SV.W.0121.220712T2312Z-220713T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
712 PM EDT Tue Jul 12 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  West central Sussex County in southern Delaware...
  Southwestern Kent County in central Delaware...
  Talbot County in eastern Maryland...
  Queen Anne's County in northeastern Maryland...
  Caroline County in eastern Maryland...
  Central Kent County in northeastern Maryland...

* Until 800 PM EDT.

* At 712 PM EDT, severe thunderstorms were located along a line
  extending from near Centreville to near Starr to near Easton,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Dover, Easton, Centerville, Denton, Centreville, Harrington,
  Camden, Federalsburg, Greensboro, Oakland, Ridgely, Cheswold, St.
  Michaels, Church Hill, Preston, Oxford, Sudlersville, Goldsboro,
  Queen Anne and Woodside.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3872 7628 3872 7621 3876 7623 3873 7627
      3890 7614 3898 7619 3900 7617 3905 7620
      3916 7607 3923 7559 3897 7546 3867 7570
      3868 7580 3871 7584 3870 7590 3866 7596
      3871 7628
TIME...MOT...LOC 2312Z 266DEG 38KT 3909 7608 3895 7601 3876 7614 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

2 follow-up statements

658 
WWUS51 KPHI 122324
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
724 PM EDT Tue Jul 12 2022

MDC029-122333-
/O.CAN.KPHI.SV.W.0121.000000T0000Z-220713T0000Z/
Kent MD-
724 PM EDT Tue Jul 12 2022

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL 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 1000 PM EDT for
central Delaware...and eastern and northeastern Maryland.

LAT...LON 3879 7613 3889 7601 3893 7602 3898 7610
      3905 7614 3916 7607 3923 7559 3897 7546
      3867 7570 3869 7577 3868 7580 3870 7580
      3871 7584 3870 7590 3866 7596 3869 7616
TIME...MOT...LOC 2323Z 274DEG 39KT 3909 7593 3890 7586 3874 7601 

$$

DEC001-005-MDC011-035-041-130000-
/O.CON.KPHI.SV.W.0121.000000T0000Z-220713T0000Z/
Sussex DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
724 PM EDT Tue Jul 12 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR WEST CENTRAL SUSSEX...SOUTHWESTERN KENT...NORTHEASTERN TALBOT...
EASTERN QUEEN ANNE'S AND CAROLINE COUNTIES...

At 723 PM EDT, severe thunderstorms were located along a line
extending from near Hope to near Denton to near Tanyard, moving east
at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Dover, Easton, Centerville, Denton, Centreville, Harrington, Camden,
Federalsburg, Greensboro, Oakland, Ridgely, Cheswold, Church Hill,
Preston, Sudlersville, Goldsboro, Queen Anne, Woodside, Viola and
Hartly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3879 7613 3889 7601 3893 7602 3898 7610
      3905 7614 3916 7607 3923 7559 3897 7546
      3867 7570 3869 7577 3868 7580 3870 7580
      3871 7584 3870 7590 3866 7596 3869 7616
TIME...MOT...LOC 2323Z 274DEG 39KT 3909 7593 3890 7586 3874 7601 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

176 
WWUS51 KPHI 122344
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
744 PM EDT Tue Jul 12 2022

MDC035-041-122354-
/O.CAN.KPHI.SV.W.0121.000000T0000Z-220713T0000Z/
Talbot MD-Queen Anne's MD-
744 PM EDT Tue Jul 12 2022

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TALBOT AND
EASTERN QUEEN ANNE'S COUNTIES 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 1000 PM EDT for
central Delaware...and eastern and northeastern Maryland.

LAT...LON 3869 7577 3868 7580 3870 7580 3871 7583
      3870 7589 3888 7572 3909 7585 3911 7583
      3922 7558 3896 7546 3867 7570
TIME...MOT...LOC 2344Z 269DEG 36KT 3909 7575 3887 7564 3871 7581 

$$

DEC001-005-MDC011-130000-
/O.CON.KPHI.SV.W.0121.000000T0000Z-220713T0000Z/
Sussex DE-Kent DE-Caroline MD-
744 PM EDT Tue Jul 12 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR WEST CENTRAL SUSSEX...SOUTHWESTERN KENT AND EASTERN CAROLINE
COUNTIES...

At 744 PM EDT, severe thunderstorms were located along a line
extending from near Sandtown to Andrewsville to near Federalsburg,
moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Dover, Harrington, Camden, Federalsburg, Cheswold, Goldsboro,
Woodside, Viola, Smithville, Hazlettville, Agner, Sandtown,
Andrewsville, Rising Sun-Lebanon, Wyoming, Felton, Greenwood,
Houston, Henderson and Marydel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3869 7577 3868 7580 3870 7580 3871 7583
      3870 7589 3888 7572 3909 7585 3911 7583
      3922 7558 3896 7546 3867 7570
TIME...MOT...LOC 2344Z 269DEG 36KT 3909 7575 3887 7564 3871 7581 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 6:36 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline, Kent, Queen Anne's, Talbot	39 min
Jul 12, 7:37 PM EDT	Severe Thunderstorm Warning Destructive damage threat	PHI	Caroline	23 min
Jul 12, 5:29 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	31 min
Jul 12, 6:28 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent	18 min
Jul 12, 7:54 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	28 min
Jul 12, 7:56 PM EDT	Special Weather Statement	PHI	Sussex	34 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2022 Severe Thunderstorm Warnings in Delaware, 2022 Every severe thunderstorm warning in 2022

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.