Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

June 30, 2012Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 30, 2012, 12:45 AM EDT for Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland. It was in force for 60 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: Jun 30, 2012, 12:45 AM EDT (04:45 UTC)
Expired: Jun 30, 2012, 1:45 AM EDT
In force: 60 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 45 km from the middle of the area, began a volume at 04:49 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, 4.8 hours before the alert went out and 130 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: 2642 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1881 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

179 
WWUS81 KPHI 300445
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1245 AM EDT SAT JUN 30 2012

DEZ001>003-MDZ008-012-015-019-020-300545-
CAROLINE MD-CECIL MD-INLAND SUSSEX DE-KENT DE-KENT MD-NEW CASTLE DE-
QUEEN ANNE'S MD-TALBOT MD-
1245 AM EDT SAT JUN 30 2012

...STRONG THUNDERSTORM WINDS WILL AFFECT CAROLINE...CECIL... 
KENT...NEW CASTLE...QUEEN ANNE'S...SUSSEX AND TALBOT COUNTIES...

ALTHOUGH MOST THUNDERSTORMS HAVE CLEARED THE AREA...DOPPLER RADAR 
CONTINUES TO INDICATE STRONG WINDS BEHIND THE MAIN LINE OF STORMS. 
ANYONE GOING OUTSIDE TO INSPECT STORM DAMAGE SHOULD BE CAREFUL FOR 
CONTINUING STRONG WINDS.

WIND GUSTS TO 50 MPH ARE POSSIBLE BEHIND THESE STORMS.

LAT...LON 3846 7569 3870 7584 3857 7603 3874 7631
      3866 7634 3867 7635 3877 7639 3889 7610
      3913 7608 3900 7621 3917 7628 3952 7599
      3972 7622 3979 7541 3962 7561 3960 7561
      3963 7557 3946 7558 3878 7514 3845 7511

$$

FORECASTER: AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 11:53 PM EDT	Special Marine Warning	PHI		97 min
Jun 30, 12:04 AM EDT	Special Marine Warning	PHI		116 min
Jun 30, 12:18 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	72 min
Jun 30, 12:25 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	65 min
Jun 30, 12:27 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	63 min
Jun 30, 12:34 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	56 min
Jun 30, 1:11 AM EDT	Special Marine Warning	PHI		64 min
Jun 30, 1:31 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	59 min
Jun 30, 2:18 AM EDT	Special Marine Warning	PHI		117 min
Jun 29, 10:54 PM EDT	Special Weather Statement	PHI	Chester, Delaware	51 min
Jun 29, 11:51 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	54 min
Jun 29, 11:22 PM EDT	Special Weather Statement	PHI	New Castle	53 min
Jun 29, 11:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	67 min
Jun 29, 11:50 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	55 min
Jun 30, 3:48 AM EDT	Heat Advisory	PHI	Kent, Sussex	16 hr
Jun 29, 11:03 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	72 min
Jun 29, 11:45 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	60 min

Nearby

Special Weather Statements in Maryland, 2012 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.