Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly

May 28, 2019New Castle County, Delaware; Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 28, 2019, 7:20 PM EDT for New Castle County, Delaware; Cumberland County, Salem County, New Jersey. It was in force for 40 min. 8 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 28, 2019, 7:20 PM EDT (23:20 UTC)
Expired
May 28, 2019, 8:00 PM EDT
In force
40 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

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

The radar

The Dover AFB radar (KDOX), 86 km from the middle of the area, began a volume at 23:20 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 28, 7:20 PM EDTHAIL 0.75Elmhurst, DE
May 28, 7:23 PM EDTHAIL 0.88Bridgeton, NJ
May 28, 7:28 PM EDTHAIL 1Carneys Point Twp, NJTIME ESTIMATED FROM RADAR.
May 28, 7:35 PM EDTHAIL 1Pennsville, NJ
May 28, 7:40 PM EDTHAIL 1.5Pennsville, NJ
May 28, 7:42 PM EDTHAIL 1.5Salem, NJ
May 28, 8:02 PM EDTTSTM WND DMG1 W Hopewell Twp., NJEMERGENCY MANAGEMENT REPORTS NUMEROUS TREES DOWN WEST OF BRIDGETON IN THE AREA OF ROADSTOWN ROAD AND RANDOLPH ROAD.
May 28, 8:06 PM EDTTSTM WND DMG2 Ssw Shiloh, NJSEVERAL REPORTS OF ABOUT 10 POWER POLES SNAPPED ALONG ROADSTOWN ROAD BETWEEN RANDOLPH ROAD AND ROADSTOWN. TIME ESTIMATED FROM RADAR.

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 28, 1:48 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.3 hours before the alert went out and 181 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, Washington/Dulle, VA at 12:00Z on 2019-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 joules per kilogram.LCLLFCEL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2019-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 293 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
35 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
293 m²/s²
0-3 km storm-relative helicity
414 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

803 
WUUS51 KPHI 282320
SVRPHI
DEC003-NJC011-033-290000-
/O.NEW.KPHI.SV.W.0068.190528T2320Z-190529T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
720 PM EDT Tue May 28 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern New Castle County in northern Delaware...
  Northwestern Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...

* Until 800 PM EDT.

* At 720 PM EDT, a severe thunderstorm was located over Delaware
  Memorial Bridge, or over Wilmington, moving southeast at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Wilmington, Vineland, Bridgeton, Pennsville, Carneys Point,
  Elsmere, New Castle, Penns Grove, Salem, Woodstown, Alloway,
  Quinton, Delaware City, Newfield, Elmer, Newport, Greenwich,
  Shiloh, Stanton and Hancocks Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect until 1000 PM EDT for northern
Delaware...and southern New Jersey.

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3978 7544 3969 7532 3966 7521 3955 7503
      3934 7536 3940 7545 3943 7546 3949 7555
      3957 7551 3962 7557 3971 7549 3972 7551
      3962 7561 3960 7561 3958 7556 3958 7557
      3951 7556 3971 7572
TIME...MOT...LOC 2320Z 300DEG 31KT 3970 7553 

HAIL...1.00IN
WIND...60MPH
 
$$

Gorse
1 follow-up statement
784 
WWUS51 KPHI 282337
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
737 PM EDT Tue May 28 2019

DEC003-282347-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-190529T0000Z/
New Castle DE-
737 PM EDT Tue May 28 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1000 PM EDT for southern New
Jersey.

LAT...LON 3966 7550 3969 7532 3966 7521 3955 7503
      3955 7504 3934 7536 3940 7545 3944 7546
      3949 7554 3950 7554 3949 7553 3954 7553
      3957 7551 3959 7555 3963 7556
TIME...MOT...LOC 2337Z 307DEG 30KT 3960 7540 

$$

NJC011-033-290000-
/O.CON.KPHI.SV.W.0068.000000T0000Z-190529T0000Z/
Cumberland NJ-Salem NJ-
737 PM EDT Tue May 28 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHWESTERN CUMBERLAND AND SALEM COUNTIES...

At 737 PM EDT, a severe thunderstorm was located near Alloway, or 11
miles southeast of Wilmington, moving southeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Vineland, Bridgeton, Pennsville, Salem, Woodstown, Alloway, Quinton,
Elmer, Greenwich, Shiloh, Olivet, Hancocks Bridge, Newport Meadows,
Seabrook Farms, Rosenhayn and Centerton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect until 1000 PM EDT for southern New
Jersey.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

Frequent cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3966 7550 3969 7532 3966 7521 3955 7503
      3955 7504 3934 7536 3940 7545 3944 7546
      3949 7554 3950 7554 3949 7553 3954 7553
      3957 7551 3959 7555 3963 7556
TIME...MOT...LOC 2337Z 307DEG 30KT 3960 7540 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Gorse

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 8:28 AM EDTSevere Thunderstorm WarningPHIKent, Sussex47 min
May 28, 9:13 AM EDTSevere Thunderstorm WarningPHIKent, Sussex47 min
May 28, 5:14 PM EDTSevere Thunderstorm WarningPHINew Castle46 min
May 28, 6:04 PM EDTSpecial Weather StatementPHINew Castle41 min
May 28, 6:11 PM EDTSevere Thunderstorm WarningPHINew Castle64 min
May 28, 6:24 PM EDTSevere Thunderstorm WarningPHINew Castle48 min
May 28, 6:52 PM EDTSevere Thunderstorm WarningPHINew Castle38 min
May 28, 7:00 PM EDTAreal Flood AdvisoryPHINew Castle3 hr
May 28, 9:17 AM EDTSpecial Marine WarningPHI58 min
May 28, 9:31 AM EDTSpecial Weather StatementPHICape May44 min
May 28, 6:13 PM EDTSpecial Marine WarningPHI62 min
May 28, 6:59 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland, Gloucester, Salem61 min
May 28, 7:39 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren66 min
May 28, 7:53 PM EDTSevere Thunderstorm WarningPHICape May, Cumberland, Salem52 min
May 28, 7:55 PM EDTAreal Flood AdvisoryPHICumberland, Salem2 hr
May 28, 7:59 PM EDTAreal Flood AdvisoryPHIMorris, Sussex, Warren2 hr
May 28, 7:59 PM EDTTornado WarningPHICumberland31 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2019Severe Thunderstorm Warnings in Delaware, 2019Every severe thunderstorm warning in 2019

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.