Alert archive / New Jersey / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 19, 20118 counties in New Jersey; 4 counties in Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 19, 2011, 4:25 PM EDT for 8 counties in New Jersey; 4 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 80 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 19, 2011, 4:25 PM EDT (20:25 UTC)
Expired: Jul 19, 2011, 5:45 PM EDT
In force: 80 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 25 km from the middle of the area, began a volume at 20:25 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.4 hours before the alert went out and 66 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: 1090 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1062 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

398 
WWUS81 KPHI 192025
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
425 PM EDT TUE JUL 19 2011

DEZ001>004-MDZ008-012-015-019-020-NJZ016>027-192145-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-CAMDEN NJ-CAPE MAY NJ-
CAROLINE MD-CECIL MD-COASTAL ATLANTIC NJ-COASTAL OCEAN NJ-
CUMBERLAND NJ-DELAWARE BEACHES DE-GLOUCESTER NJ-INLAND SUSSEX DE-
KENT MD-KENT DE-NEW CASTLE DE-NORTHWESTERN BURLINGTON NJ-OCEAN NJ-
QUEEN ANNE'S MD-SALEM NJ-SOUTHEASTERN BURLINGTON NJ-TALBOT MD-
425 PM EDT TUE JUL 19 2011

...STRONG THUNDERSTORMS WILL AFFECT ATLANTIC...BURLINGTON... 
CAMDEN...CAPE MAY...CAROLINE... CECIL...CUMBERLAND... 
GLOUCESTER...KENT...NEW CASTLE...OCEAN...QUEEN ANNE'S... 
SALEM...SUSSEX AND TALBOT COUNTIES...

AT 417 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
STRONG THUNDERSTORMS DEVELOPING OVER PORTIONS OF SOUTHERN NEW 
JERSEY, DELAWARE AND THE EASTERN SHORE OF MARYLAND.  THESE STORMS 
ARE MOVING SOUTHEAST AT 20 MPH.  

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
ADDITIONALLY, VERY HEAVY RAIN IS POSSIBLE WITH THE STRONGER STORMS.

EXPECT INTENSE LIGHTNING FROM THESE STORMS. DO NOT SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES.

LAT...LON 3846 7570 3869 7583 3856 7604 3867 7636
      3887 7625 3882 7621 3883 7620 3921 7625
      3956 7556 3932 7543 3958 7553 4011 7446
      3983 7407 3881 7508 3844 7505

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 6:02 AM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Salem	13 hr
Jul 19, 2:13 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland	92 min
Jul 19, 2:29 PM EDT	Excessive Heat Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	5 days
Jul 19, 4:11 PM EDT	Special Marine Warning	PHI		64 min
Jul 19, 5:04 PM EDT	Areal Flood Advisory	PHI	Cape May	3 hr
Jul 19, 5:52 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Salem	53 min
Jul 19, 6:00 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	90 min
Jul 19, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Gloucester	55 min
Jul 19, 6:28 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr
Jul 19, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	52 min
Jul 19, 7:28 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	3 hr
Jul 19, 3:27 AM EDT	Special Weather Statement	PHI	Monroe	63 min
Jul 19, 6:32 PM EDT	Special Weather Statement	PHI	Caroline, Talbot	88 min
Jul 19, 6:53 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	38 min
Jul 19, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	92 min
Jul 19, 3:45 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	3 hr
Jul 19, 4:12 PM EDT	Flash Flood Warning	PHI	Kent	3 hr
Jul 19, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	32 min

Nearby

Special Weather Statements in New Jersey, 2011 Special Weather Statements in Maryland, 2011 Special Weather Statements in Delaware, 2011 Every special weather statement in 2011

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.