Alert archive / Delaware / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

April 7, 2020Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 7, 2020, 11:10 PM EDT for Sussex County, Delaware. It was in force for 35 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
Apr 7, 2020, 11:10 PM EDT (03:10 UTC)
Expired
Apr 7, 2020, 11:45 PM EDT
In force
35 min
Issued by
NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 43 km from the middle of the area, began a volume at 03:09 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.2 hours before the alert went out and 61 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2020-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2020-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1245 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

543 
WWUS81 KPHI 080310
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1110 PM EDT Tue Apr 7 2020

DEZ003-004-080345-
Inland Sussex-Delaware Beaches-
1110 PM EDT Tue Apr 7 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN SUSSEX COUNTY...

At 1110 PM EDT, a strong thunderstorm was located over Laurel, or 11
miles north of Salisbury, moving east at 40 mph.

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

Locations impacted include...
Laurel, Selbyville, Delmar, Gumboro, Frankford and Bethel. 

LAT...LON 3842 7500 3846 7505 3845 7505 3845 7539
      3846 7565 3848 7569 3860 7559 3847 7487
TIME...MOT...LOC 0310Z 290DEG 34KT 3853 7555 

$$

NC

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 9:30 PM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more33 hr
Apr 8, 2:30 AM EDTSevere Thunderstorm WarningPHICamden, Gloucester30 min
Apr 8, 2:35 AM EDTSpecial Weather StatementPHICamden25 min
Apr 8, 2:40 AM EDTSpecial Weather StatementPHIHunterdon35 min
Apr 8, 2:51 AM EDTSpecial Weather StatementPHICumberland24 min
Apr 8, 2:58 AM EDTSpecial Weather StatementPHIBurlington32 min
Apr 8, 3:13 AM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex32 min
Apr 8, 3:25 AM EDTSpecial Weather StatementPHIBurlington, Ocean35 min
Apr 8, 3:50 AM EDTGale WatchPHI24 hr
Apr 8, 4:21 AM EDTSpecial Weather StatementPHICumberland39 min
Apr 8, 4:52 AM EDTSpecial Marine WarningPHI83 min
Apr 8, 4:56 AM EDTSpecial Weather StatementPHIAtlantic, Cape May, Cumberland64 min
Apr 8, 3:24 PM EDTGale WarningPHI58 hr
Apr 8, 7:19 PM EDTWind AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more24 hr
Apr 8, 1:53 AM EDTSpecial Weather StatementPHICarbon, Lehigh, Northampton37 min
Apr 8, 1:55 AM EDTSpecial Weather StatementPHIChester, Delaware50 min
Apr 8, 1:59 AM EDTSpecial Weather StatementPHIBerks46 min
Apr 7, 11:48 PM EDTSevere Thunderstorm WarningPHISussex27 min
Apr 8, 12:53 AM EDTSpecial Weather StatementPHIKent52 min
Apr 8, 1:06 AM EDTSpecial Weather StatementPHINew Castle39 min
Apr 7, 11:21 PM EDTSpecial Weather StatementPHICaroline39 min
Apr 8, 12:09 AM EDTSpecial Weather StatementPHIKent, Queen Anne's51 min

Nearby

Special Weather Statements in Delaware, 2020Every special weather statement in 2020

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.