Alert archive / Delaware / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 151, NWS Philadelphia/Mount Holly

August 4, 2022Kent County, Sussex County, Delaware; Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 4, 2022, 8:37 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 38 min. 3 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 4, 2022, 8:37 PM EDT (00:37 UTC)
Expired: Aug 4, 2022, 9:15 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kent County, DE, Sussex County, DE, Caroline County, MD

The radar

The Dover AFB radar (KDOX), 18 km from the middle of the area, began a volume at 00:36 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 4, 8:46 PM EDT	TSTM WND DMG	Laurel, DE	NUMEROUS TREES AND WIRES DOWN ACROSS LAUREL, DE. TIME ESTIMATED VIA RADAR.
Aug 4, 8:49 PM EDT	TSTM WND DMG	Georgetown, DE	REPORTS OF WIRES DOWN IN GEORGETOWN. TIME ESTIMATED VIA RADAR.
Aug 4, 8:54 PM EDT	TSTM WND DMG	5 S Sycamore, DE	* 1 INJ * TREE FELL INTO CAMPER AT TRAP POND STATE PARK. 1 MINOR INJURY REPORTED. TIME ESTIMATED VIA RADAR.

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 00:00Z, 0.6 hours before the alert went out and 84 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: 2653 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1015 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

873 
WUUS51 KPHI 050037
SVRPHI
DEC001-005-MDC011-050115-
/O.NEW.KPHI.SV.W.0151.220805T0037Z-220805T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
837 PM EDT Thu Aug 4 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Sussex County in southern Delaware...
  Southeastern Kent County in central Delaware...
  Southeastern Caroline County in eastern Maryland...

* Until 915 PM EDT.

* At 837 PM EDT, severe thunderstorms were located along a line
  extending from Bowers to near Andrewsville to 6 miles southeast of
  Cambridge, moving southeast at 25 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...
  Dover, Georgetown, Milford, Seaford, Millsboro, Laurel, Harrington,
  Lewes, Federalsburg, Milton, Bridgeville, Delmar, Dagsboro,
  Ellendale, Bowers, Henlopen Acres, Smithville, Gumboro, Cape
  Henlopen State Park and Agner.

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.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

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

&&

LAT...LON 3845 7538 3846 7569 3865 7571 3869 7577
      3868 7580 3870 7580 3870 7586 3884 7570
      3917 7543 3891 7491 3864 7513 3845 7536
TIME...MOT...LOC 0037Z 293DEG 23KT 3908 7540 3881 7562 3849 7599 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

1 follow-up statement

149 
WWUS51 KPHI 050112
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
912 PM EDT Thu Aug 4 2022

DEC001-005-MDC011-050122-
/O.EXP.KPHI.SV.W.0151.000000T0000Z-220805T0115Z/
Sussex DE-Kent DE-Caroline MD-
912 PM EDT Thu Aug 4 2022

...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTHEASTERN KENT AND
SOUTHEASTERN CAROLINE COUNTIES WILL EXPIRE AT 915 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

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 3845 7538 3846 7569 3865 7571 3869 7577
      3868 7580 3870 7580 3870 7586 3884 7570
      3917 7543 3891 7491 3864 7513 3845 7536
TIME...MOT...LOC 0112Z 293DEG 23KT 3899 7514 3872 7536 3840 7573 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 8:06 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, Sussex	39 min
Aug 4, 9:04 PM EDT	Special Weather Statement	PHI	Sussex	26 min
Aug 5, 2:06 PM EDT	Special Weather Statement	PHI	Sussex	24 min
Aug 5, 2:14 PM EDT	Special Weather Statement	PHI	Sussex	31 min
Aug 5, 2:50 PM EDT	Special Weather Statement	PHI	Sussex	25 min
Aug 5, 3:15 PM EDT	Areal Flood Advisory	PHI	Sussex	114 min
Aug 5, 3:17 PM EDT	Special Weather Statement	PHI	Sussex	28 min
Aug 5, 3:21 PM EDT	Special Weather Statement	PHI	Sussex	24 min
Aug 5, 3:43 PM EDT	Special Weather Statement	PHI	Sussex	32 min
Aug 5, 3:52 PM EDT	Special Weather Statement	PHI	Kent	23 min
Aug 5, 4:12 PM EDT	Special Weather Statement	PHI	Sussex	48 min
Aug 5, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	22 min
Aug 5, 4:58 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	2 hr
Aug 4, 9:42 PM EDT	Special Weather Statement	PHI	Caroline	33 min
Aug 4, 11:26 PM EDT	Special Weather Statement	PHI	Caroline	34 min
Aug 5, 4:47 PM EDT	Special Weather Statement	PHI	Caroline	28 min
Aug 5, 5:06 PM EDT	Special Weather Statement	PHI	Caroline	39 min
Aug 5, 5:37 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	38 min
Aug 5, 6:12 PM EDT	Special Weather Statement	PHI	Talbot	33 min
Aug 5, 6:47 PM EDT	Special Weather Statement	PHI	Queen Anne's	28 min
Aug 5, 7:15 PM EDT	Special Weather Statement	PHI	Talbot	45 min
Aug 5, 7:24 PM EDT	Flash Flood Warning	PHI	Caroline, Queen Anne's, Talbot	55 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2022 Severe Thunderstorm Warnings in Maryland, 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.