Alert archive / Maryland / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 149, NWS Philadelphia/Mount Holly

August 4, 2022Kent County, Maryland; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 4, 2022, 7:41 PM EDT for Kent County, Maryland; New Castle County, Delaware. It was in force for 34 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: Aug 4, 2022, 7:41 PM EDT (23:41 UTC)
Expired: Aug 4, 2022, 8:15 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties New Castle County, DE, Kent County, MD

The radar

The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 23:43 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, 7:51 PM EDT	TSTM WND GST 58	1 S Odessa, DE	DEDOT GAUGE AT US 1 AT APPOQUINIMINK RIVER MEASURED 58 MPH GUST.

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.7 hours before the alert went out and 170 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: 729 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1307 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

918 
WUUS51 KPHI 042341
SVRPHI
DEC003-MDC029-050015-
/O.NEW.KPHI.SV.W.0149.220804T2341Z-220805T0015Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern New Castle County in northern Delaware...
  Northeastern Kent County in northeastern Maryland...

* Until 815 PM EDT.

* At 740 PM EDT, a severe thunderstorm was located over Cayots, or
  near Middletown, 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...
  Middletown, Pennsville, Salem, Delaware City, Saint Georges, Port
  Penn, Mount Pleasant, Townsend, Galena and Odessa.

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 3938 7577 3957 7578 3964 7555 3957 7550
      3966 7548 3961 7541 3958 7549 3954 7544
      3954 7554 3950 7553 3951 7548 3949 7553
      3950 7554 3946 7554 3943 7540 3941 7542
      3934 7588
TIME...MOT...LOC 2340Z 253DEG 31KT 3945 7583 

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

$$

MPS

1 follow-up statement

973 
WWUS51 KPHI 050008
SVSPHI

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

DEC003-MDC029-050018-
/O.EXP.KPHI.SV.W.0149.000000T0000Z-220805T0015Z/
New Castle DE-Kent MD-
808 PM EDT Thu Aug 4 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE AND
NORTHEASTERN KENT COUNTIES WILL EXPIRE AT 815 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

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 3938 7577 3957 7578 3964 7555 3957 7550
      3966 7548 3961 7541 3958 7549 3954 7544
      3954 7554 3950 7553 3951 7548 3949 7553
      3950 7554 3946 7554 3943 7540 3941 7542
      3934 7588
TIME...MOT...LOC 0008Z 253DEG 31KT 3952 7554 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	40 min
Aug 4, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	51 min
Aug 4, 7:32 PM EDT	Special Weather Statement	PHI	Kent, New Castle	43 min

Nearby

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