Alert archive / Maryland / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 18, NWS Philadelphia/Mount Holly

April 2, 20164 states

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 2, 2016, 10:51 PM EDT for 4 states. It was in force for 39 min. 9 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
Apr 2, 2016, 10:51 PM EDT (02:51 UTC)
Expired
Apr 2, 2016, 11:30 PM EDT
In force
39 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA

The radar

The Dover AFB radar (KDOX), 81 km from the middle of the area, began a volume at 02:55 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
Apr 2, 10:53 PM EDTTSTM WND GST 53Chestertown, MD
Apr 2, 10:55 PM EDTHAIL 0.5North East, MD
Apr 2, 11:05 PM EDTTSTM WND DMGNewark, DETREE TOPPLED OVER HITTING A HOUSE IN NEWARK.
Apr 2, 11:05 PM EDTHAIL 0.25Elkton, MD
Apr 2, 11:11 PM EDTHAIL 0.25Newark, DEPEA SIZE HAIL IN NEWARK.
Apr 2, 11:15 PM EDTTSTM WND GST 53New Castle County Airpo, DE
Apr 2, 11:15 PM EDTHAIL 0.88Bear, DE
Apr 2, 11:15 PM EDTHAIL 1Wilmington, DE
Apr 2, 11:29 PM EDTTSTM WND GST 55New Castle County Airpo, DE

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.9 hours before the alert went out and 154 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 00:00Z on 2016-04-03Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2016-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.1939587897117136Sfc1 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
2870 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

938 
WUUS51 KPHI 030251
SVRPHI
DEC001-003-MDC015-029-035-NJC015-033-PAC029-045-030330-
/O.NEW.KPHI.SV.W.0018.160403T0251Z-160403T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1051 PM EDT SAT APR 2 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  NORTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
  NORTHERN KENT COUNTY IN NORTHEASTERN MARYLAND...
  CECIL COUNTY IN NORTHEASTERN MARYLAND...
  NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...
  SOUTH CENTRAL CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  SOUTH CENTRAL DELAWARE COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 1130 PM EDT

* AT 1050 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR
  LOMBARD TO NEAR MIDDLE RIVER...AND MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CALVERT...OXFORD...BLAKE...LOMBARD...FAIR HILL...PLEASANT HILL...ZION 
  AND BAY VIEW AROUND 1055 PM EDT. 
  KEMBLESVILLE...APPLETON...ANDORA...BARKSDALE AND CHERRY HILL AROUND 
  1100 PM EDT. 
  CHESTERTOWN...LADENBERG AND GLEN WESTOVER AROUND 1105 PM EDT. 
  NEWARK...BETTERTON AND NORTH STAR AROUND 1110 PM EDT. 
  ASHLAND...KENNEDYVILLE...HOCKESSIN...PIKE CREEK...MORGNEC AND STANTON 
  AROUND 1115 PM EDT. 
  ELSMERE...NEWPORT...GREENVILLE...CRUMPTON AND WILMINGTON MANOR AROUND 
  1120 PM EDT. 
  WILMINGTON...PENNSVILLE...MILLINGTON AND TALLEYVILLE AROUND 1125 PM 
  EDT. 
  CARNEYS POINT...PENNS GROVE...CECILTON...ARDEN...MASSEY...DELANEY 
  CORNER...SASSAFRAS AND WARWICK AROUND 1130 PM EDT. 

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE MARCUS
HOOK...TOWNSEND...CHESAPEAKE CITY...BROOKSIDE...KENTON...CHAMBERSVILLE...
ARDENCROFT...EDGEMOOR...KINGSTOWN AND ODESSA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

TO REPORT SEVERE WEATHER...CONTACT THE NATIONAL WEATHER SERVICE...OR
YOUR LOCAL AUTHORITY WHO WILL RELAY YOUR REPORT TO THE NATIONAL
WEATHER SERVICE OFFICE IN MOUNT HOLLY NJ .

&&

LAT...LON 3929 7617 3932 7618 3943 7600 3952 7598
      3957 7610 3979 7596 3982 7539 3946 7554
      3957 7551 3962 7557 3966 7552 3972 7551
      3970 7552 3962 7561 3959 7557 3946 7559
      3940 7553 3921 7560 3918 7626
TIME...MOT...LOC 0250Z 258DEG 35KT 3974 7597 3924 7630 

$$

DRAG
1 follow-up statement
229 
WWUS51 KPHI 030316
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1116 PM EDT SAT APR 2 2016

DEC001-003-MDC015-029-035-NJC015-033-PAC029-045-030330-
/O.CON.KPHI.SV.W.0018.000000T0000Z-160403T0330Z/
NEW CASTLE DE-KENT DE-KENT MD-CECIL MD-QUEEN ANNE'S MD-GLOUCESTER NJ-
SALEM NJ-CHESTER PA-DELAWARE PA-
1116 PM EDT SAT APR 2 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR NEW CASTLE...NORTHWESTERN KENT...NORTHEASTERN KENT...SOUTHEASTERN
CECIL...NORTHEASTERN QUEEN ANNE'S...NORTHWESTERN GLOUCESTER...
NORTHWESTERN SALEM...SOUTHEASTERN CHESTER AND SOUTH CENTRAL DELAWARE
COUNTIES...

AT 1114 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM ELSMERE TO
NEAR MORGNEC...MOVING EAST AT 60 TO 70 MPH.

1 INCH DIAMETER HAIL WAS JUST REPORTED FROM WILMINGTON DELAWARE. 

THESE SEVERE STORMS WILL BE NEAR...
  WILMINGTON...PENNSVILLE...CARNEYS POINT...ELSMERE...NEW CASTLE...PENNS 
  GROVE...NEWPORT...WILMINGTON MANOR AND GREENVILLE AROUND 1120 PM 
  EDT. 

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE MARCUS
HOOK...TOWNSEND...CHESAPEAKE CITY...BROOKSIDE...KENTON...CHAMBERSVILLE...
EDGEMOOR...ODESSA...GALENA AND CLAYMONT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 3932 7599 3943 7592 3955 7582 3963 7579
      3977 7562 3982 7539 3946 7554 3957 7551
      3962 7557 3966 7552 3972 7551 3970 7552
      3962 7561 3959 7557 3946 7559 3940 7553
      3921 7560 3919 7604 3928 7602
TIME...MOT...LOC 0314Z 282DEG 59KT 3973 7561 3922 7598 

$$

DRAG

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 10:02 PM EDTSpecial Weather StatementPHIKent, New Castle88 min
Apr 2, 11:09 PM EDTSevere Thunderstorm WarningPHINew Castle51 min
Apr 2, 11:24 PM EDTSevere Thunderstorm WarningPHIKent, New Castle51 min
Apr 3, 11:34 AM EDTWind AdvisoryPHINew Castle4 hr
Apr 3, 3:40 PM EDTFreeze WatchPHIKent, New Castle12 hr
Apr 2, 9:45 PM EDTSpecial Weather StatementPHICecil2 hr
Apr 2, 10:08 PM EDTSpecial Weather StatementPHICumberland37 min
Apr 2, 10:27 PM EDTSpecial Weather StatementPHIAtlantic, Cumberland33 min
Apr 2, 11:02 PM EDTSpecial Marine WarningPHI88 min
Apr 2, 11:40 PM EDTSpecial Marine WarningPHI65 min
Apr 2, 11:56 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset34 min
Apr 3, 12:08 AM EDTSpecial Weather StatementPHICape May22 min
Apr 3, 12:14 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Ocean31 min
Apr 3, 12:19 AM EDTSpecial Weather StatementPHIUnion26 min
Apr 3, 12:23 AM EDTSpecial Marine WarningPHI52 min
Apr 3, 12:30 AM EDTSpecial Marine WarningPHI60 min
Apr 3, 12:39 AM EDTSpecial Weather StatementPHIMonmouth21 min
Apr 3, 12:46 AM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean14 min
Apr 3, 12:52 AM EDTSpecial Weather StatementPHIOcean8 min
Apr 3, 1:12 AM EDTSpecial Marine WarningPHI33 min
Apr 3, 5:45 AM EDTLow Water AdvisoryPHI9 hr
Apr 3, 11:37 AM EDTGale WarningPHI4 hr
Apr 3, 3:07 PM EDTLow Water AdvisoryPHI113 min
Apr 3, 3:54 PM EDTGale WatchPHI12 hr
Apr 3, 3:54 PM EDTSmall Craft AdvisoryPHI5 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2016Severe Thunderstorm Warnings in Delaware, 2016Severe Thunderstorm Warnings in New Jersey, 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.