Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 5, 2012New Castle County, Delaware; Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 5, 2012, 10:50 PM EDT for New Castle County, Delaware; Cecil County, Maryland. It was in force for 55 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 5, 2012, 10:50 PM EDT (02:50 UTC)
Expired: Aug 5, 2012, 11:45 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD

The radar

The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 02:52 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.8 hours before the alert went out and 149 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: 629 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1122 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 132 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.

215 
WWUS81 KPHI 060250
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1050 PM EDT SUN AUG 5 2012

DEZ001-MDZ008-012-NJZ016-PAZ067-060345-
CECIL MD-CHESTER PA-KENT MD-NEW CASTLE DE-SALEM NJ-
1050 PM EDT SUN AUG 5 2012

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

AT 1048 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 15 MILES SOUTHWEST OF ELKTON...MOVING EAST AT 35
MPH. THE THUNDERSTORM WILL BE NEAR HOLLYWOOD BEACH...CHARLESTOWN
AROUND 1100 PM...BRANTWOOD...GLASGOW AROUND 1115 PM...BEAR...DELAWARE
CITY AROUND 1130 PM...PENNSVILLE AND CARNEYS POINT AROUND 1145 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.

LAT...LON 3984 7558 3984 7553 3947 7535 3944 7550
      3946 7555 3950 7556 3946 7558 3943 7554
      3929 7618 3932 7619 3934 7617 3938 7611
      3938 7606 3942 7601 3952 7599 3954 7607
      3958 7608 3971 7621

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 9:17 PM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	58 min
Aug 5, 9:48 PM EDT	Special Weather Statement	PHI	Burlington, Mercer, Monmouth	57 min
Aug 5, 10:00 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean	60 min
Aug 5, 10:14 PM EDT	Special Marine Warning	PHI		2 hr
Aug 5, 10:42 PM EDT	Special Weather Statement	PHI	Monmouth	48 min
Aug 5, 10:47 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	43 min
Aug 5, 11:02 PM EDT	Special Weather Statement	PHI	Ocean	58 min
Aug 5, 11:25 PM EDT	Special Marine Warning	PHI		65 min
Aug 5, 11:31 PM EDT	Areal Flood Advisory	PHI	Salem	3 hr
Aug 5, 11:42 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	63 min
Aug 6, 12:00 AM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester	60 min
Aug 6, 12:38 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more	3 hr
Aug 6, 12:46 AM EDT	Special Weather Statement	PHI	Burlington, Camden, Ocean	59 min
Aug 6, 1:09 AM EDT	Special Weather Statement	PHI	Atlantic	66 min
Aug 6, 1:36 AM EDT	Special Marine Warning	PHI		54 min
Aug 6, 2:23 AM EDT	Special Weather Statement	PHI	Atlantic	67 min
Aug 6, 3:32 AM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	58 min
Aug 6, 5:21 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland, Gloucester, Ocean	113 min

Nearby

Special Weather Statements in Delaware, 2012 Special Weather Statements in Maryland, 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.