Alert archive / Delaware / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

June 9, 2021New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 9, 2021, 1:35 PM EDT for New Castle County, Delaware. It was in force for 25 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: Jun 9, 2021, 1:35 PM EDT (17:35 UTC)
Expired: Jun 9, 2021, 2:00 PM EDT
In force: 25 min
Issued by: NWS Philadelphia/Mount Holly

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 103 km from the middle of the area, began a volume at 17:38 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, 5.6 hours before the alert went out and 168 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: 193 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1225 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -75 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

716 
WWUS81 KPHI 091735
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
135 PM EDT Wed Jun 9 2021

DEZ001-091800-
New Castle-
135 PM EDT Wed Jun 9 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN NEW CASTLE COUNTY...

At 134 PM EDT, a strong thunderstorm was located over Stanton, or
near Newark, moving southeast at 10 mph.

Wind gusts up to 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Wilmington, Newark, Elsmere, New Castle, Newport, Stanton, North
Star, Wilmington Manor, Pike Creek, Hockessin, Greenville, Brookside
and Edgemoor.

This includes Interstate 95 in Delaware between mile markers 6 and
15.
 
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 3973 7578 3973 7577 3974 7577 3979 7572
      3974 7547 3963 7559 3969 7579 3972 7579
TIME...MOT...LOC 1734Z 293DEG 8KT 3971 7565 

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 8:40 PM EDT	Special Marine Warning	PHI		65 min
Jun 9, 1:46 PM EDT	Special Marine Warning	PHI		59 min
Jun 9, 1:48 PM EDT	Special Weather Statement	PHI	Salem	27 min
Jun 9, 1:52 PM EDT	Special Weather Statement	PHI	Atlantic	23 min
Jun 9, 2:07 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	23 min
Jun 9, 2:14 PM EDT	Special Weather Statement	PHI	Salem	31 min
Jun 9, 2:21 PM EDT	Flash Flood Warning	PHI	Cumberland, Gloucester, Salem	73 min
Jun 9, 2:47 PM EDT	Special Marine Warning	PHI		58 min
Jun 9, 3:32 PM EDT	Special Weather Statement	PHI	Burlington	28 min
Jun 9, 3:48 PM EDT	Special Marine Warning	PHI		57 min
Jun 9, 3:49 PM EDT	Flash Flood Warning	PHI	Burlington	3 hr
Jun 9, 3:51 PM EDT	Special Weather Statement	PHI	Hunterdon	24 min
Jun 9, 5:32 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth	28 min
Jun 9, 6:46 PM EDT	Special Marine Warning	PHI		59 min
Jun 9, 6:50 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	87 min
Jun 9, 7:42 PM EDT	Special Marine Warning	PHI		63 min
Jun 9, 4:54 PM EDT	Flash Flood Warning	PHI	Berks, Montgomery	112 min
Jun 9, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	23 min
Jun 8, 8:15 PM EDT	Special Weather Statement	PHI	Sussex	45 min
Jun 9, 7:54 AM EDT	River Flood Warning	PHI	New Castle	5 hr
Jun 9, 2:26 PM EDT	Severe Thunderstorm Warning	PHI	Kent	64 min
Jun 9, 2:28 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	62 min
Jun 9, 3:11 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	64 min
Jun 9, 3:24 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jun 9, 4:32 PM EDT	Areal Flood Advisory	PHI	Sussex	108 min
Jun 9, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	27 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.