Alert archive / Delaware / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

October 16, 2021New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 16, 2021, 3:40 PM EDT for New Castle County, Delaware. It was in force for 50 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: Oct 16, 2021, 3:40 PM EDT (19:40 UTC)
Expired: Oct 16, 2021, 4:30 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.00 in
Wind: 40

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 79 km from the middle of the area, began a volume at 19:41 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, 7.7 hours before the alert went out and 165 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1259 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

368 
WWUS81 KPHI 161940
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
340 PM EDT Sat Oct 16 2021
 
DEZ001-NJZ016-021-162030-
New Castle DE-Salem NJ-Cumberland NJ-
340 PM EDT Sat Oct 16 2021

...A strong thunderstorm will impact portions of southwestern New
Castle, northwestern Cumberland and southwestern Salem Counties
through 430 PM EDT...

At 340 PM EDT, Doppler radar was tracking a strong thunderstorm over
Bohemias Mills, or near Middletown, moving east at 35 mph.

HAZARD...Wind gusts up to 45 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Middletown, Salem, Alloway, Quinton, Delaware City, Shiloh, Saint
Georges, Mount Pleasant, Hancocks Bridge, Port Penn, Hope Creek,
Townsend and Odessa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3957 7577 3961 7541 3946 7527 3937 7577
      3956 7578
TIME...MOT...LOC 1940Z 250DEG 30KT 3946 7582 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 16, 10:35 AM EDT	Coastal Flood Statement	PHI	Ocean	2 hr
Oct 16, 3:22 PM EDT	Special Marine Warning	PHI		113 min
Oct 16, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Salem	18 min
Oct 16, 3:41 PM EDT	Special Weather Statement	PHI	Hunterdon, Sussex, Warren	49 min
Oct 16, 4:02 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	43 min
Oct 16, 4:18 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 1 more	57 min
Oct 16, 5:10 PM EDT	Special Marine Warning	PHI		95 min
Oct 16, 5:29 PM EDT	Special Marine Warning	PHI		91 min
Oct 16, 6:09 PM EDT	Special Marine Warning	PHI		66 min
Oct 16, 6:52 PM EDT	Coastal Flood Statement	PHI	Ocean	4 hr
Oct 16, 1:39 PM EDT	Special Weather Statement	PHI	Berks	51 min
Oct 16, 2:32 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	58 min
Oct 16, 2:44 PM EDT	Special Weather Statement	PHI	Chester	61 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.