Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 51, NWS Philadelphia/Mount Holly

June 26, 2013Burlington County, Camden County, New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 26, 2013, 8:11 PM EDT for Burlington County, Camden County, New Jersey; 4 counties in Pennsylvania. It was in force for 64 min. 1 report 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
Jun 26, 2013, 8:11 PM EDT (00:11 UTC)
Expired
Jun 26, 2013, 9:15 PM EDT
In force
64 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 64 km from the middle of the area, began a volume at 00:11 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
Jun 26, 8:30 PM EDTTSTM WND DMGLower Merion Twp, PATREES DOWN.

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
Jun 26, 2:55 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 217 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, Brookhaven, NY at 00:00Z on 2013-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 311 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, Brookhaven, NY at 00:00Z on 2013-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
311 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1282 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

860 
WUUS51 KPHI 270011
SVRPHI
NJC005-007-PAC029-045-091-101-270115-
/O.NEW.KPHI.SV.W.0051.130627T0011Z-130627T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
811 PM EDT WED JUN 26 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTHERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  EAST CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
  WEST CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 915 PM EDT

* AT 810 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR PAOLI...MOVING EAST AT 25
  MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RADNOR TOWNSHIP AND BROOMALL AROUND 820 PM EDT...
  TROUT LAKE AND NORRISTOWN AROUND 825 PM EDT...
  BRYN MAWR AND CONSHOHOCKEN AROUND 830 PM EDT...
  NARBERTH AND MORRIS PARK AROUND 835 PM EDT...
  ROXBOROUGH AND CHESTNUT HILL AROUND 840 PM EDT...
  GERMANTOWN AROUND 845 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CREATE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

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

&&

LAT...LON 4011 7558 4016 7505 4011 7496 4009 7495
      4006 7498 4005 7497 4007 7493 3983 7496
      3985 7510 3989 7514 3988 7519 3986 7521
      3990 7557
TIME...MOT...LOC 0011Z 264DEG 22KT 4001 7545

$$

IOVINO
2 follow-up statements
148 
WWUS51 KPHI 270029
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
829 PM EDT WED JUN 26 2013

PAC029-270038-
/O.CAN.KPHI.SV.W.0051.000000T0000Z-130627T0115Z/
CHESTER PA-
829 PM EDT WED JUN 26 2013

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHESTER COUNTY IS
CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF CHESTER COUNTY...THEREFORE THE SEVERE THUNDERSTORM WARNING 
HAS BEEN CANCELLED.

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

LAT...LON 3983 7496 3985 7510 3989 7514 3986 7522
      3989 7542 4002 7542 4007 7536 4007 7540
      4013 7542 4016 7505 4011 7496 4009 7495
      4006 7498 4005 7497 4007 7493
TIME...MOT...LOC 0028Z 264DEG 22KT 4002 7531

$$

NJC005-007-PAC045-091-101-270115-
/O.CON.KPHI.SV.W.0051.000000T0000Z-130627T0115Z/
CAMDEN NJ-MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-BURLINGTON NJ-
829 PM EDT WED JUN 26 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR WEST CENTRAL BURLINGTON...NORTHEASTERN DELAWARE...PHILADELPHIA...
SOUTHEASTERN MONTGOMERY AND NORTHWESTERN CAMDEN COUNTIES...

AT 824 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR TROUT LAKE...OR 11 MILES WEST OF PHILADELPHIA...MOVING EAST AT
25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
NARBERTH AND MORRIS PARK AROUND 835 PM EDT...
ROXBOROUGH AND CHESTNUT HILL AROUND 840 PM EDT...
GERMANTOWN AND WYNDMOOR AROUND 845 PM EDT...
PHILADELPHIA AND KENSINGTON AROUND 850 PM EDT...
ROCKLEDGE AND ABINGTON AROUND 855 PM EDT...
TACONY AND WISSINOMING AROUND 900 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3983 7496 3985 7510 3989 7514 3986 7522
      3989 7542 4002 7542 4007 7536 4007 7540
      4013 7542 4016 7505 4011 7496 4009 7495
      4006 7498 4005 7497 4007 7493
TIME...MOT...LOC 0028Z 264DEG 22KT 4002 7531

$$

IOVINO
277 
WWUS51 KPHI 270050
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
850 PM EDT WED JUN 26 2013

PAC045-270100-
/O.CAN.KPHI.SV.W.0051.000000T0000Z-130627T0115Z/
DELAWARE PA-
850 PM EDT WED JUN 26 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DELAWARE COUNTY
IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF DELAWARE COUNTY...THEREFORE THE SEVERE THUNDERSTORM WARNING 
HAS BEEN CANCELLED.

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

LAT...LON 3983 7496 3985 7510 3989 7514 3988 7519
      3986 7521 3988 7522 4014 7530 4016 7505
      4011 7496 4009 7495 4006 7498 4005 7497
      4007 7493
TIME...MOT...LOC 0050Z 264DEG 22KT 4003 7514

$$

NJC005-007-PAC091-101-270115-
/O.CON.KPHI.SV.W.0051.000000T0000Z-130627T0115Z/
CAMDEN NJ-MONTGOMERY PA-PHILADELPHIA PA-BURLINGTON NJ-
850 PM EDT WED JUN 26 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR WEST CENTRAL BURLINGTON...PHILADELPHIA...SOUTHEASTERN MONTGOMERY
AND NORTHWESTERN CAMDEN COUNTIES...

AT 845 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED NEAR GERMANTOWN...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
ROCKLEDGE AND ABINGTON AROUND 855 PM EDT...
TACONY AND WISSINOMING AROUND 900 PM EDT...
HOLMESBURG AND RIVERTON AROUND 905 PM EDT...
RIVERSIDE AND MOORESTOWN-LENOLA AROUND 910 PM EDT...
DELANCO AROUND 915 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3983 7496 3985 7510 3989 7514 3988 7519
      3986 7521 3988 7522 4014 7530 4016 7505
      4011 7496 4009 7495 4006 7498 4005 7497
      4007 7493
TIME...MOT...LOC 0050Z 264DEG 22KT 4003 7514

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 8:02 PM EDTSpecial Weather StatementPHICape May58 min
Jun 26, 8:18 PM EDTSpecial Weather StatementPHIMercer, Monmouth57 min
Jun 26, 9:20 PM EDTSpecial Weather StatementPHIBurlington40 min
Jun 26, 9:31 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden44 min
Jun 26, 10:20 PM EDTSpecial Weather StatementPHICamden40 min
Jun 26, 10:54 PM EDTSpecial Weather StatementPHIBurlington, Ocean51 min
Jun 27, 3:55 AM EDTSmall Craft AdvisoryPHI6 days
Jun 27, 3:52 PM EDTSpecial Marine WarningPHI38 min
Jun 27, 4:04 PM EDTSpecial Weather StatementPHISalem56 min
Jun 27, 4:22 PM EDTSpecial Marine WarningPHI38 min
Jun 27, 4:49 PM EDTSpecial Marine WarningPHI56 min
Jun 27, 4:51 PM EDTSpecial Weather StatementPHICamden, Cumberland, Gloucester, Salem114 min
Jun 27, 5:52 PM EDTSpecial Weather StatementPHIWarren53 min
Jun 27, 6:42 PM EDTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Cape May, Mercer63 min
Jun 27, 7:07 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more3 hr
Jun 27, 7:19 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset, Warren56 min
Jun 27, 4:32 PM EDTSpecial Weather StatementPHIBerks, Bucks, Chester, Delaware, Montgomery, Philadelphia118 min
Jun 27, 5:18 PM EDTAreal Flood AdvisoryPHIChester4 hr
Jun 27, 6:27 PM EDTAreal Flood AdvisoryPHIBerks, Bucks, Chester, Lehigh, Montgomery4 hr
Jun 27, 6:35 PM EDTSpecial Weather StatementPHIBucks, Lehigh55 min
Jun 27, 6:52 PM EDTAreal Flood WarningPHIChester9 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013Severe Thunderstorm Warnings in New Jersey, 2013Every severe thunderstorm warning in 2013

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.