Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

October 15, 2012Kent County, Sussex County, Delaware; Caroline County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 15, 2012, 7:33 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Talbot County, Maryland. It was in force for 117 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: Oct 15, 2012, 7:33 PM EDT (23:33 UTC)
Expired: Oct 15, 2012, 9:30 PM EDT
In force: 117 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 23:33 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
Oct 15, 9:28 PM EDT	MARINE TSTM WIND 35	Lewes, DE
Oct 15, 9:28 PM EDT	MARINE TSTM WIND 39	Lewes, 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, 11.6 hours before the alert went out and 81 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 181 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.

182 
WWUS81 KPHI 152333
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
733 PM EDT MON OCT 15 2012

DEZ002>004-MDZ015-019-020-160130-
CAROLINE MD-DELAWARE BEACHES DE-INLAND SUSSEX DE-KENT DE-
QUEEN ANNE'S MD-TALBOT MD-
733 PM EDT MON OCT 15 2012

...SHOWERS WITH HEAVY RAINFALL WILL AFFECT KENT...CAROLINE...
SUSSEX...QUEEN ANNE'S AND TALBOT COUNTIES...

AT 728 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH HEAVY RAINFALL ALONG A LINE EXTENDING FROM 13 MILES WEST
OF DOVER TO 32 MILES SOUTHWEST OF DOVER TO 45 MILES SOUTH OF 
BALTIMORE...MOVING EAST AT 20 MPH. THERE COULD BE AN ISOLATED 
THUNDERSTORM. 

THE SHOWERS WILL BE NEAR KENTON..CORDOVA...OAKLAND...OAKLAND AROUND 
740 PM...RIDGELY...OXFORD...GOLDSBORO...EASTON AROUND 745 
PM...CHESWOLD AND GRIFFIN AROUND 750 PM.

IN ADDITION, OTHER SHOWERS WILL BE MOVING INTO SOUTHERN DELAWARE
FROM THE LOWER PENINSULA. 

VERY HEAVY RAIN WILL FALL FROM THE STRONG SHOWERS AND ISOLATED 
THUNDERSTORMS AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY 
FILL POOR DRAINAGE AREAS. RAINFALL AMOUNTS OF UP TO HALF AN INCH
WITHIN AN HOUR ARE POSSIBLE. 

LAT...LON 3845 7569 3864 7571 3870 7584 3867 7594
      3857 7603 3872 7626 3872 7631 3866 7634
      3867 7635 3875 7638 3884 7625 3882 7620
      3888 7621 3925 7576 3929 7576 3914 7539
      3892 7530 3879 7515 3880 7508 3844 7505

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 4:33 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	87 min
Oct 15, 4:48 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth	87 min
Oct 15, 2:02 PM EDT	Special Weather Statement	PHI	Chester, Delaware	88 min
Oct 15, 2:44 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	61 min
Oct 15, 3:25 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	80 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.