Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 306, NWS Philadelphia/Mount Holly

August 1, 2019Caroline County, Queen Anne's County, Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 1, 2019, 4:56 PM EDT for Caroline County, Queen Anne's County, Maryland; Kent County, Sussex County, Delaware. It was in force for 50 min. 5 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: Aug 1, 2019, 4:56 PM EDT (20:56 UTC)
Expired: Aug 1, 2019, 5:46 PM EDT
In force: 50 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, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 26 km from the middle of the area, began a volume at 20:55 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
Aug 1, 4:58 PM EDT	TSTM WND DMG	2 W Felton, DE	TREE LIMBS DOWN AT THE INTERSECTION OF SANDTOWN ROAD AND BURNITE MILL ROAD. TIME ESTIMATED FROM RADAR.
Aug 1, 5:02 PM EDT	TSTM WND DMG	Felton, DE	TREES AND WIRES REPORTED DOWN IN FELTON. TIME ESTIMATED FROM RADAR.
Aug 1, 5:30 PM EDT	TSTM WND GST 50	Bridgeville, DE	DEOS SITE MEASURED A 50 MPH GUST IN BRIDGEVILLE.
Aug 1, 5:40 PM EDT	TSTM WND DMG	Bridgeville, DE	TREES REPORTED DOWN IN BRIDGEVILLE.
Aug 1, 5:40 PM EDT	HAIL 0.7	Bridgeville, DE	DIME SIZE HAIL REPORTED IN BRIDGEVILLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.9 hours before the alert went out and 110 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: 134 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1051 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

894 
WUUS51 KPHI 012056
SVRPHI
DEC001-005-MDC011-035-012200-
/O.NEW.KPHI.SV.W.0306.190801T2056Z-190801T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
456 PM EDT Thu Aug 1 2019

The National Weather Service in Mount Holly NJ has issued a

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

* Until 600 PM EDT.

* At 455 PM EDT, a severe thunderstorm was located over Sandtown, or 
  13 miles southwest of Dover, moving south at 20 mph. Another 
  severe thunderstorm was moving into northwestern Sussex County 
  from the north.

  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, Milford, Denton, Harrington, Camden, Bridgeville,
  Greensboro, Oakland, Ridgely, Ellendale, Goldsboro, Woodside,
  Viola, Smithville, Jumptown, Hazlettville, Agner, Sandtown,
  Andrewsville and Harmony.

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 this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

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

&&

LAT...LON 3870 7587 3912 7599 3918 7557 3871 7533
TIME...MOT...LOC 2055Z 348DEG 18KT 3902 7570 

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

Gorse

2 follow-up statements

219 
WWUS51 KPHI 012125
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
525 PM EDT Thu Aug 1 2019

MDC035-012133-
/O.CAN.KPHI.SV.W.0306.000000T0000Z-190801T2200Z/
Queen Anne's MD-
525 PM EDT Thu Aug 1 2019

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL QUEEN ANNE'S
COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3870 7587 3896 7594 3898 7594 3898 7593
      3905 7551 3871 7533
TIME...MOT...LOC 2123Z 339DEG 18KT 3889 7564 

$$

DEC001-005-MDC011-012200-
/O.CON.KPHI.SV.W.0306.000000T0000Z-190801T2200Z/
Sussex DE-Kent DE-Caroline MD-
525 PM EDT Thu Aug 1 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN SUSSEX...SOUTHWESTERN KENT AND CAROLINE COUNTIES...

At 523 PM EDT, a severe thunderstorm was located over Andrewsville, 
or 18 miles northwest of Georgetown, moving south at 20 mph. An 
additional severe thunderstorm continues to move across northwestern 
Sussex County from the north.

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...
Milford, Denton, Harrington, Bridgeville, Greensboro, Oakland,
Ridgely, Ellendale, Viola, Harmony, Smithville, Jumptown, Agner,
Andrewsville, Griffin, Felton, Greenwood, Houston, Farmington and
Riverview.

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 this storm.
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, and may lead to flash flooding. Do 
not drive your vehicle through flooded roadways.

&&

LAT...LON 3870 7587 3896 7594 3898 7594 3898 7593
      3905 7551 3871 7533
TIME...MOT...LOC 2123Z 339DEG 18KT 3889 7564 

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

Gorse

312 
WWUS51 KPHI 012146
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
546 PM EDT Thu Aug 1 2019

DEC001-005-MDC011-012155-
/O.CAN.KPHI.SV.W.0306.000000T0000Z-190801T2200Z/
Sussex DE-Kent DE-Caroline MD-
546 PM EDT Thu Aug 1 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX...
SOUTHWESTERN KENT AND CAROLINE COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, this warning has been cancelled.

LAT...LON 3870 7587 3896 7594 3898 7594 3898 7593
      3905 7551 3871 7533
TIME...MOT...LOC 2144Z 348DEG 18KT 3878 7561 

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 8:00 PM EDT	Special Weather Statement	PHI	Kent	30 min
Jul 31, 8:13 PM EDT	Special Weather Statement	PHI	Queen Anne's	32 min
Jul 31, 8:47 PM EDT	Special Weather Statement	PHI	Caroline	28 min
Aug 1, 4:02 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	45 min
Aug 1, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	54 min
Aug 1, 4:41 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	21 min
Jul 31, 8:39 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Jul 31, 8:48 PM EDT	Special Weather Statement	PHI	Sussex	27 min
Jul 31, 9:18 PM EDT	Special Weather Statement	PHI	Sussex	27 min
Aug 1, 2:43 PM EDT	Special Weather Statement	PHI	Kent	47 min
Aug 1, 3:02 PM EDT	Coastal Flood Advisory	PHI	Kent, New Castle, Sussex	12 hr
Aug 1, 3:39 PM EDT	Special Weather Statement	PHI	Kent	51 min
Aug 1, 3:51 PM EDT	Special Weather Statement	PHI	Kent	39 min
Aug 1, 4:00 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	60 min
Aug 1, 4:11 PM EDT	Special Weather Statement	PHI	New Castle	34 min
Aug 1, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	47 min
Aug 1, 6:16 PM EDT	Special Weather Statement	PHI	Sussex	14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.