Alert archive / Maryland / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 17, NWS Philadelphia/Mount Holly

April 9, 2020Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 9, 2020, 12:29 PM EDT for Kent County, Queen Anne's County, Maryland. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 9, 2020, 12:29 PM EDT (16:29 UTC)
Expired: Apr 9, 2020, 1:00 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Dover AFB radar (KDOX), 78 km from the middle of the area, began a volume at 16:33 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 12:01 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.5 hours before the alert went out and 117 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: 20 J/kg
Mixed-layer CIN: -589 J/kg
Mixed-layer LCL: 1002 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 394 m²/s²
0-3 km storm-relative helicity: 416 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

882 
WUUS51 KPHI 091629
SVRPHI
MDC029-035-091700-
/O.NEW.KPHI.SV.W.0017.200409T1629Z-200409T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1229 PM EDT Thu Apr 9 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 100 PM EDT.

* At 1228 PM EDT, a severe thunderstorm was located near Newtown, or
  11 miles east of Middle River, moving east at 45 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...
  Chestertown, Church Hill, Millington, Betterton, Old Town,
  Langford, Newtown, Starkey Corner, Morgnec, Massey, Crumpton,
  Kennedyville, Galena and Kingstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3926 7622 3928 7620 3929 7617 3932 7618
      3934 7616 3933 7614 3937 7611 3937 7606
      3938 7606 3933 7579 3907 7597 3920 7625
TIME...MOT...LOC 1628Z 289DEG 40KT 3931 7622 

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

MPS

1 follow-up statement

715 
WWUS51 KPHI 091650
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1250 PM EDT Thu Apr 9 2020

MDC029-035-091700-
/O.EXP.KPHI.SV.W.0017.000000T0000Z-200409T1700Z/
Queen Anne's MD-Kent MD-
1250 PM EDT Thu Apr 9 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL QUEEN ANNE'S AND
KENT COUNTIES WILL EXPIRE AT 100 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 400 PM EDT for
northeastern Maryland.

LAT...LON 3926 7622 3928 7620 3929 7617 3932 7618
      3934 7616 3933 7614 3937 7611 3937 7606
      3938 7606 3933 7579 3907 7597 3920 7625
TIME...MOT...LOC 1650Z 289DEG 40KT 3923 7594 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 6:53 AM EDT	Special Weather Statement	PHI	Queen Anne's, Talbot	37 min
Apr 9, 7:35 AM EDT	Special Weather Statement	PHI	Caroline, Kent	40 min
Apr 9, 12:57 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	33 min
Apr 9, 1:12 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	48 min
Apr 9, 3:32 PM EDT	Wind Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	27 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.