Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 3, 2012New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 3, 2012, 3:57 PM EDT for New Castle County, Delaware. It was in force for 63 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 3, 2012, 3:57 PM EDT (19:57 UTC)
Expired: Aug 3, 2012, 5:00 PM EDT
In force: 63 min
Issued by: NWS Philadelphia/Mount Holly

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 19:56 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.

What was reported inside it

Time	Report	Where	Remark
Aug 3, 4:30 PM EDT	TSTM WND DMG	Blackbird, DE	WIRES DOWN.
Aug 3, 4:35 PM EDT	HAIL 0.88	Townsend, DE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.0 hours before the alert went out and 48 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: 1112 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 37 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.

574 
WWUS81 KPHI 031957
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
357 PM EDT FRI AUG 3 2012

DEZ001-002-NJZ016-021-032100-
CUMBERLAND NJ-KENT DE-NEW CASTLE DE-SALEM NJ-
357 PM EDT FRI AUG 3 2012

...A STRONG THUNDERSTORM WILL AFFECT CUMBERLAND...KENT...NEW CASTLE
AND SALEM COUNTIES...

AT 352 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 10 MILES SOUTHEAST OF MIDDLETOWN...MOVING
NORTHEAST AT 10 MPH. THE THUNDERSTORM WILL BE NEAR CHAMBERSVILLE
AROUND 405 PM...WOODLAND BEACH AROUND 410 PM...HOPE CREEK...PORT PENN
AROUND 445 PM...NEWPORT MEADOWS AROUND 450 PM AND HANCOCKS BRIDGE
AROUND 500 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

EXPECT SMALL HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING
FROM THIS STORM.

LAT...LON 3961 7556 3945 7530 3936 7540 3943 7547
      3946 7555 3950 7556 3948 7558 3946 7558
      3942 7553 3937 7551 3932 7544 3922 7556
      3933 7577 3938 7577

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:38 PM EDT	Special Weather Statement	PHI	Burlington	67 min
Aug 3, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	58 min
Aug 3, 4:21 PM EDT	Special Marine Warning	PHI		84 min
Aug 3, 4:35 PM EDT	Special Weather Statement	PHI	Monmouth	55 min
Aug 3, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	60 min
Aug 3, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	63 min
Aug 3, 5:35 PM EDT	Special Weather Statement	PHI	Mercer	55 min
Aug 3, 5:42 PM EDT	Special Weather Statement	PHI	Mercer	63 min
Aug 3, 5:46 PM EDT	Areal Flood Advisory	PHI	Gloucester	101 min
Aug 3, 5:55 PM EDT	Special Weather Statement	PHI	Burlington	65 min
Aug 3, 6:20 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer	2 hr
Aug 3, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	43 min
Aug 3, 2:39 PM EDT	Special Weather Statement	PHI	Chester	66 min
Aug 3, 4:15 PM EDT	Special Weather Statement	PHI	Delaware	60 min
Aug 3, 7:33 PM EDT	Special Weather Statement	PHI	Bucks	57 min
Aug 3, 2:58 PM EDT	Special Weather Statement	PHI	Sussex	62 min
Aug 3, 4:14 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	3 hr
Aug 3, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	40 min
Aug 3, 5:24 PM EDT	Special Weather Statement	PHI	Cecil	66 min

Nearby

Special Weather Statements in Delaware, 2012 Every special weather statement in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.