Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 198, NWS Philadelphia/Mount Holly

July 4, 2019Caroline County, Talbot County, Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 4, 2019, 3:15 PM EDT for Caroline County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 27 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: Jul 4, 2019, 3:15 PM EDT (19:15 UTC)
Expired: Jul 4, 2019, 3:42 PM EDT
In force: 27 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, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 19:18 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 nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.3 hours before the alert went out and 109 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: 1129 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1075 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

343 
WUUS51 KPHI 041915
SVRPHI
DEC001-005-MDC011-041-042000-
/O.NEW.KPHI.SV.W.0198.190704T1915Z-190704T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
315 PM EDT Thu Jul 4 2019

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...
  East central Talbot County in eastern Maryland...
  Central Caroline County in eastern Maryland...

* Until 400 PM EDT.

* At 315 PM EDT, a severe thunderstorm was located over Denton, or 14
  miles northeast of Easton, moving east at 10 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...
  Denton, Ridgely, Jumptown, Agner, Matthews, Harmony, Smithville,
  Griffin, Andrewsville and Hillsboro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3880 7599 3897 7592 3894 7560 3871 7570
TIME...MOT...LOC 1915Z 282DEG 10KT 3886 7582 

HAIL...1.00IN
WIND...60MPH
 
$$

MPS

1 follow-up statement

104 
WWUS51 KPHI 041942
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
342 PM EDT Thu Jul 4 2019

DEC001-005-MDC011-041-041951-
/O.CAN.KPHI.SV.W.0198.000000T0000Z-190704T2000Z/
Sussex DE-Kent DE-Talbot MD-Caroline MD-
342 PM EDT Thu Jul 4 2019

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL SUSSEX...
SOUTHWESTERN KENT...EAST CENTRAL TALBOT AND CENTRAL CAROLINE COUNTIES
IS CANCELLED...
                
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 has been cancelled.  However, heavy rain is 
still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 3880 7599 3897 7592 3894 7560 3871 7570
TIME...MOT...LOC 1939Z 282DEG 10KT 3884 7573 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 2:11 PM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	4 hr
Jul 4, 2:17 PM EDT	Special Weather Statement	PHI	Talbot	43 min
Jul 4, 2:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	52 min
Jul 4, 3:46 PM EDT	Special Weather Statement	PHI	Caroline	44 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2019 Severe Thunderstorm Warnings in Delaware, 2019 Every severe thunderstorm warning in 2019

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.