Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly

May 26, 2011Carbon County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 26, 2011, 6:50 PM EDT for Carbon County, Pennsylvania. It was in force for 55 min. 3 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 26, 2011, 6:50 PM EDT (22:50 UTC)
Expired
May 26, 2011, 7:45 PM EDT
In force
55 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Carbon County, PA

The radar

The Binghamton radar (KBGM), 136 km from the middle of the area, began a volume at 22:53 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 26, 7:06 PM EDTHAIL 3Lansford, PA
May 26, 7:06 PM EDTHAIL 3Summit Hill, PA
May 26, 7:10 PM EDTHAIL 3Lansford, PAHOUSE WINDOWS BROKEN AND CAR DENTED BY LARGE HAIL

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.8 hours before the alert went out and 170 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 2011-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 970 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 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
970 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
989 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
288 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

742 
WUUS51 KPHI 262250
SVRPHI
PAC025-262345-
/O.NEW.KPHI.SV.W.0068.110526T2250Z-110526T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
650 PM EDT THU MAY 26 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 745 PM EDT

* AT 647 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  WEST OF NESQUEHONING...OR 12 MILES WEST OF LEHIGHTON...AND MOVING
  NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NESQUEHONING AROUND 705 PM EDT...
  WEATHERLY AND JIM THORPE AROUND 715 PM EDT...
  6 MILES SOUTHEAST OF WHITE HAVEN AROUND 730 PM EDT...
  CHRISTMANS AROUND 740 PM EDT...
  7 MILES NORTHWEST OF PENN FOREST RESERVOIR AROUND 745 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4112 7570 4091 7555 4079 7586 4084 7594
      4091 7600 4095 7588 4098 7584 4100 7575
      4103 7576 4105 7578 4107 7578
TIME...MOT...LOC 2249Z 235DEG 18KT 4086 7594

$$

RPW
1 follow-up statement
991 
WWUS51 KPHI 262320
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
720 PM EDT THU MAY 26 2011

PAC025-262345-
/O.CON.KPHI.SV.W.0068.000000T0000Z-110526T2345Z/
CARBON PA-
720 PM EDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR CARBON COUNTY...

AT 717 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING VERY LARGE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED NEAR WEATHERLY...OR 8 MILES NORTHWEST OF LEHIGHTON...MOVING 
NORTHEAST AT 20 MPH. SPOTTER REPORTS 3 INCH DIAMETER HAIL IN SUMMIT
HILL AND LANSFORD AT 7:06 PM.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES SOUTHEAST OF WHITE HAVEN BY 730 PM EDT...
  6 MILES SOUTHEAST OF EAST SIDE BY 735 PM EDT...
  CHRISTMANS BY 740 PM EDT...
  7 MILES NORTHWEST OF PENN FOREST RESERVOIR BY 745 PM EDT...

LAT...LON 4112 7570 4091 7555 4081 7586 4085 7592
      4090 7593 4095 7588 4098 7584 4100 7575
      4103 7576 4105 7578 4107 7578
TIME...MOT...LOC 2318Z 235DEG 18KT 4094 7578

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 5:50 PM EDTSpecial Weather StatementPHICarbon55 min
May 26, 7:48 PM EDTSpecial Weather StatementPHICarbon, Monroe57 min
May 26, 7:56 PM EDTSpecial Weather StatementPHIBerks49 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning in 2011

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.