Alert archive / Delaware / Special Weather Statements in 2015

Special Weather Statement, NWS Philadelphia/Mount Holly

July 6, 2015Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 6, 2015, 4:03 PM EDT for Sussex County, Delaware. It was in force for 57 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: Jul 6, 2015, 4:03 PM EDT (20:03 UTC)
Expired: Jul 6, 2015, 5:00 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 19 km from the middle of the area, began a volume at 20:06 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, 8.1 hours before the alert went out and 80 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: 1168 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

882 
WWUS81 KPHI 062003
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
403 PM EDT MON JUL 6 2015
 
DEZ003-062100-
INLAND SUSSEX-
403 PM EDT MON JUL 6 2015

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

AT 402 PM EDT...A STRONG THUNDERSTORM WAS NEAR GUMBORO...OR 10 MILES
NORTHEAST OF SALISBURY...MOVING NORTH AT 25 MPH.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND WILL 
CAUSE PONDING ON ROADWAYS AND POOR DRAINAGE AREAS.

OCCASIONAL CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE 
SHELTER INSIDE A BUILDING OR VEHICLE.

WIND GUSTS UP TO 30 MPH ARE ALSO POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR...
  SYCAMORE AROUND 420 PM EDT.
  MILLSBORO AROUND 425 PM EDT.
  GEORGETOWN AROUND 445 PM EDT.
  MILTON AND ELLENDALE AROUND 500 PM EDT.

LAT...LON 3845 7555 3884 7555 3884 7552 3879 7522
      3875 7523 3845 7536
TIME...MOT...LOC 2002Z 188DEG 20KT 3848 7545 
$$

ROBERTSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:49 PM EDT	Special Weather Statement	PHI	Hunterdon	41 min
Jul 6, 6:50 PM EDT	Special Weather Statement	PHI	Berks, Montgomery	40 min
Jul 6, 7:10 PM EDT	Special Weather Statement	PHI	Delaware	50 min
Jul 6, 7:19 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery	4 hr
Jul 6, 7:55 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	4 hr
Jul 6, 5:23 PM EDT	Areal Flood Advisory	PHI	Cecil	4 hr
Jul 6, 6:05 PM EDT	Flash Flood Warning	PHI	Cecil	4 hr
Jul 6, 4:54 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Jul 6, 5:02 PM EDT	Special Weather Statement	PHI	Kent	28 min

Nearby

Special Weather Statements in Delaware, 2015 Every special weather statement in 2015

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.