Alert archive / Delaware / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 38, NWS Philadelphia/Mount Holly

May 14, 2016Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 14, 2016, 6:11 PM EDT for Sussex County, Delaware. It was in force for 34 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
May 14, 2016, 6:11 PM EDT (22:11 UTC)
Expired
May 14, 2016, 6:45 PM EDT
In force
34 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 22:13 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

TimeReportWhereRemark
May 14, 6:11 PM EDTMARINE TSTM WIND 45Dewey Beach, DE
May 14, 6:16 PM EDTMARINE TSTM WIND 48Dewey Beach, DE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.2 hours before the alert went out and 83 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 12:00Z on 2016-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2016-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1930 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

066 
WUUS51 KPHI 142211
SVRPHI
DEC005-142245-
/O.NEW.KPHI.SV.W.0038.160514T2211Z-160514T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
611 PM EDT SAT MAY 14 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...

* UNTIL 645 PM EDT

* AT 611 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MILLVILLE...OR
  10 MILES NORTHWEST OF OCEAN CITY...MOVING NORTHEAST AT 55 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  LEWES...MILLVILLE...HENLOPEN ACRES...CAPE HENLOPEN STATE PARK...LONG
  NECK...OCEAN VIEW...SOUTH BETHANY AND DEWEY BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3879 7523 3881 7511 3881 7506 3876 7505
      3846 7504 3846 7505 3845 7505 3845 7520
TIME...MOT...LOC 2211Z 235DEG 46KT 3849 7515 

HAIL...<.75IN
WIND...60MPH
 
$$

PO
1 follow-up statement
243 
WWUS51 KPHI 142229
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
629 PM EDT SAT MAY 14 2016

DEC005-142245-
/O.CON.KPHI.SV.W.0038.000000T0000Z-160514T2245Z/
SUSSEX DE-
629 PM EDT SAT MAY 14 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...

AT 629 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED 11 MILES SOUTHEAST
OF HENLOPEN ACRES...OR 20 MILES NORTHEAST OF OCEAN CITY...MOVING
NORTHEAST AT 55 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
LEWES...MILLVILLE...HENLOPEN ACRES...CAPE HENLOPEN STATE PARK...LONG
NECK...OCEAN VIEW...SOUTH BETHANY AND DEWEY BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3878 7514 3881 7511 3881 7506 3876 7505
      3846 7504 3845 7505 3845 7514
TIME...MOT...LOC 2229Z 235DEG 46KT 3862 7491 

HAIL...<.75IN
WIND...60MPH
 
$$

PO

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 2:44 PM EDTSpecial Weather StatementPHIKent, New Castle61 min
May 14, 3:41 PM EDTSpecial Weather StatementPHIKent, New Castle, Sussex79 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2016Every severe thunderstorm warning in 2016

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.