Alert archive / Delaware / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

August 7, 2018Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 7, 2018, 2:13 PM EDT for Sussex County, Delaware. It was in force for 47 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 7, 2018, 2:13 PM EDT (18:13 UTC)
Expired: Aug 7, 2018, 3:00 PM EDT
In force: 47 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 18:16 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 12:00Z, 6.2 hours before the alert went out and 76 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: 1558 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 937 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 31 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.

586 
WWUS81 KPHI 071813
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
213 PM EDT TUE AUG 7 2018

DEZ003-004-071900-
Inland Sussex-Delaware Beaches-
213 PM EDT TUE AUG 7 2018

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

At 210 PM EDT, strong thunderstorms were located in southeastern 
Sussex County, moving northeast at 5 mph.

Winds up to 40 mph are possible with these storm.

Locations impacted include...
Millsboro, Selbyville, Dagsboro, Millville, Long Neck, Ocean View,
Frankford and South Bethany.

Torrential rainfall is also occurring with these storms, and may 
cause localized flooding. Do not drive your vehicle through flooded 
roadways.

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

LAT...LON 3855 7534 3863 7518 3864 7511 3867 7507
      3862 7507 3862 7515 3859 7521 3857 7518
      3859 7514 3858 7507 3860 7507 3860 7510
      3861 7506 3860 7506 3845 7505 3845 7526
TIME...MOT...LOC 1811Z 244DEG 5KT 3848 7520 

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 12:19 PM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 6 more	6 hr
Aug 7, 2:24 PM EDT	Areal Flood Advisory	PHI	Sussex	78 min
Aug 7, 3:31 PM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 4 more	26 hr
Aug 7, 4:27 PM EDT	Special Weather Statement	PHI	Sussex	48 min
Aug 7, 5:07 PM EDT	Special Weather Statement	PHI	Sussex	53 min
Aug 7, 5:46 PM EDT	Special Weather Statement	PHI	Morris, Sussex	59 min
Aug 7, 4:07 PM EDT	Special Weather Statement	PHI	Monroe	38 min
Aug 7, 4:44 PM EDT	Special Weather Statement	PHI	Monroe	61 min
Aug 7, 4:48 PM EDT	Special Weather Statement	PHI	Lehigh	57 min
Aug 7, 5:32 PM EDT	Special Weather Statement	PHI	Berks	58 min
Aug 7, 5:41 PM EDT	Special Weather Statement	PHI	Lehigh	49 min
Aug 7, 6:21 PM EDT	Special Weather Statement	PHI	Lehigh	54 min
Aug 7, 6:25 PM EDT	Special Weather Statement	PHI	Berks	65 min
Aug 7, 4:50 PM EDT	Special Weather Statement	PHI	Kent	55 min

Nearby

Special Weather Statements in Delaware, 2018 Every special weather statement in 2018

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.