Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 159, NWS Philadelphia/Mount Holly

July 22, 2020Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2020, 4:47 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 43 min. 1 report 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 22, 2020, 4:47 PM EDT (20:47 UTC)
Expired: Jul 22, 2020, 5:30 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Dover AFB radar (KDOX), 72 km from the middle of the area, began a volume at 20:48 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 22, 5:04 PM EDT	TSTM WND DMG	1 Ene Talbot, MD	DOWNED WIRES NEAR CLAIBORNE ROAD IN TALBOT. 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 22, 2:57 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.8 hours before the alert went out and 99 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: 248 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 1163 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

999 
WUUS51 KPHI 222047
SVRPHI
MDC011-035-041-222130-
/O.NEW.KPHI.SV.W.0159.200722T2047Z-200722T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
447 PM EDT Wed Jul 22 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 530 PM EDT.

* At 447 PM EDT, a severe thunderstorm was located over 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...
  Easton, Centerville, Talbot, Centreville, Trappe, St. Michaels,
  Grasonville, Tilghman Island, Starr, Skipton, Copperville, Chester,
  Wye Mills, Hambleton, Carville, Cordova, Queenstown and
  Stevensville South.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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.

&&

LAT...LON 3886 7626 3879 7620 3894 7621 3889 7629
      3896 7631 3885 7637 3884 7637 3885 7638
      3896 7635 3908 7597 3857 7604 3876 7622
      3872 7630 3878 7629 3867 7634 3868 7635
      3876 7638
TIME...MOT...LOC 2047Z 265DEG 32KT 3879 7652 

HAIL...0.75IN
WIND...60MPH
 
$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 9:16 PM EDT	Special Weather Statement	PHI	Kent	29 min
Jul 21, 9:25 PM EDT	Special Weather Statement	PHI	Talbot	35 min
Jul 21, 9:39 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	51 min
Jul 21, 9:46 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	29 min
Jul 21, 10:14 PM EDT	Special Weather Statement	PHI	Caroline	46 min
Jul 21, 10:21 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	54 min
Jul 22, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	22 min
Jul 22, 4:38 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	52 min
Jul 22, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	47 min
Jul 22, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	52 min
Jul 22, 5:54 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's	51 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2020 Every severe thunderstorm warning in 2020

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.