Alert archive / Delaware / Special Weather Statements in 2014

Special Weather Statement, NWS Philadelphia/Mount Holly

September 6, 2014Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 6, 2014, 9:13 PM EDT for Sussex County, Delaware. It was in force for 62 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
Sep 6, 2014, 9:13 PM EDT (01:13 UTC)
Expired
Sep 6, 2014, 10:15 PM EDT
In force
62 min
Issued by
NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 23 km from the middle of the area, began a volume at 01:15 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, 1.2 hours before the alert went out and 80 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2014-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1728 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2014-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1728 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1060 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.5

Open this sounding in Storm Lab

The text

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

128 
WWUS81 KPHI 070113
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
913 PM EDT SAT SEP 6 2014

DEZ003-004-070215-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
913 PM EDT SAT SEP 6 2014

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SUSSEX COUNTY...

AT 908 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
ELLENDALE TO MARDELA SPRINGS...MOVING EAST AT 20 MPH.

WIND GUSTS TO 30 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS. 

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. DO
NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. 

THESE STORMS WILL BE NEAR LAUREL AROUND 920 PM...MILTON AROUND 930
PM...LEWES AROUND 1000 PM...REHOBOTH BEACH AROUND 1010 PM AND
SELBYVILLE AROUND 1020 PM.

LAT...LON 3845 7567 3846 7570 3858 7571 3890 7547
      3887 7524 3880 7516 3879 7511 3881 7510
      3880 7508 3866 7505 3866 7506 3851 7504
      3844 7509 3845 7552

$$

FORECASTER: SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 8:13 PM EDTSpecial Marine WarningPHI62 min
Sep 6, 8:41 PM EDTSpecial Weather StatementPHIMorris, Sussex, Warren64 min
Sep 6, 9:04 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Morris, Somerset, Warren42 min
Sep 6, 9:30 PM EDTSpecial Weather StatementPHIBurlington, Mercer60 min
Sep 6, 9:39 PM EDTSpecial Marine WarningPHI66 min
Sep 6, 9:50 PM EDTSpecial Weather StatementPHIMorris55 min
Sep 6, 10:06 PM EDTSpecial Weather StatementPHISalem24 min
Sep 6, 11:00 PM EDTSpecial Weather StatementPHIAtlantic30 min
Sep 7, 3:35 AM EDTSmall Craft AdvisoryPHI4 days
Sep 6, 8:27 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton63 min
Sep 6, 9:23 PM EDTSpecial Weather StatementPHICaroline67 min
Sep 6, 10:00 PM EDTAreal Flood AdvisoryPHIKent, Sussex4 hr

Nearby

Special Weather Statements in Delaware, 2014Every special weather statement in 2014

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.