Alert archive / Delaware / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 30, 2021Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 30, 2021, 4:14 PM EDT for Kent County, Delaware. 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: Aug 30, 2021, 4:14 PM EDT (20:14 UTC)
Expired: Aug 30, 2021, 4:45 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.25 in
Wind: 40

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 20:15 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.2 hours before the alert went out and 152 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: 843 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

302 
WWUS81 KPHI 302014
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
414 PM EDT Mon Aug 30 2021
 
DEZ001-002-MDZ012-302045-
Kent DE-New Castle DE-Kent MD-
414 PM EDT Mon Aug 30 2021

...A strong thunderstorm will impact portions of southwestern New
Castle, northern Kent and northeastern Kent Counties through 445 PM
EDT...

At 414 PM EDT, Doppler radar was tracking a strong thunderstorm over
Delaney Corner, or 10 miles south of Middletown, moving east at 15
mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Smyrna, Clayton, Cheswold, Sassafras, Delaney Corner, Woodland Beach,
Green Spring, Townsend, Kenton, Leipsic and Chambersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3938 7577 3942 7577 3944 7551 3920 7536
      3922 7575 3925 7576 3924 7580 3938 7581
TIME...MOT...LOC 2014Z 279DEG 13KT 3930 7574 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 5:00 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	71 hr
Aug 30, 5:44 AM EDT	Dense Fog Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more	3 hr
Aug 30, 4:48 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	27 min
Aug 30, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	44 min
Aug 30, 5:21 PM EDT	Special Weather Statement	PHI	Atlantic	24 min
Aug 30, 5:26 PM EDT	Special Marine Warning	PHI		64 min
Aug 30, 5:44 PM EDT	Special Marine Warning	PHI		61 min
Aug 30, 5:53 PM EDT	Special Weather Statement	PHI	Atlantic	22 min
Aug 30, 5:56 PM EDT	Special Weather Statement	PHI	Cape May	49 min
Aug 30, 6:16 PM EDT	Special Marine Warning	PHI		89 min
Aug 30, 6:41 PM EDT	Special Weather Statement	PHI	Cape May	34 min
Aug 30, 7:20 PM EDT	Special Weather Statement	PHI	Cape May	25 min
Aug 30, 7:31 PM EDT	Special Marine Warning	PHI		59 min
Aug 30, 3:44 PM EDT	Special Weather Statement	PHI	New Castle	31 min
Aug 30, 6:02 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	28 min
Aug 30, 3:46 PM EDT	Special Weather Statement	PHI	Kent	29 min
Aug 30, 4:27 PM EDT	Special Weather Statement	PHI	Kent	33 min
Aug 30, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	51 min

Nearby

Special Weather Statements in Delaware, 2021 Every special weather statement in 2021

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.