Alert archive / New Jersey / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 26, NWS Philadelphia/Mount Holly

May 14, 2010Cumberland County, Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 14, 2010, 7:27 PM EDT for Cumberland County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 63 min. 7 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, 2010, 7:27 PM EDT (23:27 UTC)
Expired
May 14, 2010, 8:30 PM EDT
In force
63 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties New Castle County, DE, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 82 km from the middle of the area, began a volume at 23:30 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, 7:35 PM EDTHAIL 0.88Delaware City, DE
May 14, 8:05 PM EDTHAIL 1Bridgeton, NJ
May 14, 8:08 PM EDTHAIL 12 Ne Greenwich, NJQUARTER SIZE HAIL IN HOPWELL TWP.
May 14, 8:10 PM EDTTSTM WND DMGBridgeton, NJNUMEROUS WIRES AND TREES DOWN THROUGHOUT THE CITY OF BRIDGETON. DAMAGE WAS STRAIGHT LINE WIND.
May 14, 8:12 PM EDTHAIL 0.88Bridgeton, NJNICKEL SIZE HAIL IN BRIDGETON
May 14, 8:20 PM EDTTSTM WND DMGBridgeton, NJNUMEROUS WIRES AND TREES DOWN THROUGHOUT THE CITY OF BRIDGETON.
May 14, 8:28 PM EDTHAIL 16 N Millville, NJONE INCH HAIL REPORTED IN VINELAND.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 14, 3:43 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.5 hours before the alert went out and 53 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, Phillips Aaf/Abe, MD at 12:00Z on 2010-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2010-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.19395878Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

059 
WUUS51 KPHI 142327
SVRPHI
DEC003-NJC011-033-150030-
/O.NEW.KPHI.SV.W.0026.100514T2327Z-100515T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
727 PM EDT FRI MAY 14 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MILLVILLE...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 830 PM EDT

* AT 724 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  DELAWARE CITY...OR 10 MILES SOUTH OF WILMINGTON...AND MOVING
  SOUTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SALEM AROUND 735 PM EDT...
  ALLOWAY AROUND 745 PM EDT...
  SHILOH AND SEABROOK FARMS AROUND 755 PM EDT...
  BRIDGETON AROUND 800 PM EDT...
  ROSENHAYN AND FAIRTON AROUND 805 PM EDT...
  MILLVILLE AROUND 815 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

HAIL UP TO QUARTER SIZE HAS BEEN REPORTED IN BEAR WITH THIS STORM. IF 
YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT 
LIFE AND PROPERTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3971 7560 3969 7553 3962 7560 3959 7559
      3969 7551 3956 7506 3931 7501 3931 7531
      3947 7556 3958 7554 3954 7555 3958 7556
      3948 7558 3953 7571
TIME...MOT...LOC 2326Z 297DEG 33KT 3959 7557

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 4:18 PM EDTSpecial Weather StatementPHIWarren57 min
May 14, 5:07 PM EDTSpecial Weather StatementPHIMorris, Warren53 min
May 14, 5:53 PM EDTSevere Thunderstorm WarningPHIHunterdon, Somerset, Warren67 min
May 14, 6:09 PM EDTSpecial Weather StatementPHIMorris66 min
May 14, 6:11 PM EDTSpecial Weather StatementPHIWarren64 min
May 14, 6:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Hunterdon, Mercer65 min
May 14, 6:58 PM EDTSpecial Weather StatementPHIMercer, Monmouth, Ocean62 min
May 14, 7:04 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth, Ocean56 min
May 14, 7:19 PM EDTSpecial Marine WarningPHI56 min
May 14, 7:19 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester56 min
May 14, 7:33 PM EDTSpecial Marine WarningPHI87 min
May 14, 7:48 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean57 min
May 14, 6:35 PM EDTSevere Thunderstorm WarningPHINew Castle55 min
May 14, 7:00 PM EDTSevere Thunderstorm WarningPHINew Castle60 min
May 14, 7:08 PM EDTSevere Thunderstorm WarningPHIKent, New Castle67 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2010Severe Thunderstorm Warnings in Delaware, 2010Every severe thunderstorm warning in 2010

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.