Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

July 15, 2012New Castle County, Delaware; Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 15, 2012, 8:08 PM EDT for New Castle County, Delaware; Cecil County, Maryland. It was in force for 67 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 15, 2012, 8:08 PM EDT (00:08 UTC)
Expired: Jul 15, 2012, 9:15 PM EDT
In force: 67 min
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD

The radar

The Dover AFB radar (KDOX), 97 km from the middle of the area, began a volume at 00:10 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, 0.1 hours before the alert went out and 155 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: 652 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1264 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 119 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.

679 
WWUS81 KPHI 160008
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EDT SUN JUL 15 2012

DEZ001-MDZ008-PAZ067-160115-
CECIL MD-CHESTER PA-NEW CASTLE DE-
808 PM EDT SUN JUL 15 2012

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

AT 805 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 21 MILES WEST OF ELKTON...MOVING EAST AT 30 MPH.
THE THUNDERSTORM WILL BE NEAR PORT DEPOSIT...RICHARDSMERE AROUND 815
PM...WOODLAWN...WOODLAWN...WEST NOTTINGHAM...PERRYVILLE AROUND 820
PM...FARMINGTON...RISING SUN AROUND 825 PM...BAY VIEW AND CHARLESTOWN
AROUND 830 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 3988 7560 3965 7556 3964 7559 3960 7560
      3964 7557 3954 7556 3951 7599 3953 7600
      3954 7607 3956 7610 3958 7608 3969 7621
      3970 7621

$$

FORECASTER: AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 8:04 PM EDT	Special Weather Statement	PHI	Atlantic	56 min
Jul 15, 8:11 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	64 min
Jul 15, 8:35 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth	55 min
Jul 15, 8:39 PM EDT	Special Marine Warning	PHI		66 min
Jul 15, 8:58 PM EDT	Special Weather Statement	PHI	Burlington, Camden	62 min
Jul 15, 9:00 PM EDT	Special Weather Statement	PHI	Burlington	60 min
Jul 15, 9:21 PM EDT	Special Weather Statement	PHI	Mercer	54 min
Jul 15, 9:33 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth	57 min
Jul 15, 9:45 PM EDT	Special Marine Warning	PHI		60 min
Jul 15, 9:52 PM EDT	Special Weather Statement	PHI	Ocean	68 min
Jul 15, 9:55 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer, Monmouth, Ocean	80 min
Jul 15, 10:14 PM EDT	Special Marine Warning	PHI		79 min
Jul 15, 10:51 PM EDT	Special Weather Statement	PHI	Atlantic, Camden, Gloucester, Salem	54 min
Jul 15, 11:25 PM EDT	Special Weather Statement	PHI	Atlantic, Ocean	65 min
Jul 16, 3:35 AM EDT	Heat Advisory	PHI	Burlington, Hunterdon, Middlesex, Monmouth, Morris, Ocean and 3 more	62 hr
Jul 15, 8:27 PM EDT	Special Weather Statement	PHI	Chester, Montgomery, Philadelphia	63 min
Jul 15, 8:30 PM EDT	Severe Thunderstorm Warning	PHI	Chester	45 min
Jul 15, 9:16 PM EDT	Special Weather Statement	PHI	Chester	59 min
Jul 16, 4:32 PM EDT	Special Weather Statement	PHI	Sussex	88 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.