Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 70, NWS Philadelphia/Mount Holly

May 26, 20115 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 26, 2011, 8:46 PM EDT for 5 counties in Pennsylvania. It was in force for 59 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
May 26, 2011, 8:46 PM EDT (00:46 UTC)
Expired
May 26, 2011, 9:45 PM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Binghamton radar (KBGM), 139 km from the middle of the area, began a volume at 00:48 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, 8:58 PM EDTTSTM WND DMGJim Thorpe, PABRANCHES DOWN..POLES FIRES ..POWER OUT
May 26, 8:58 PM EDTTSTM WND DMGNesquehoning, PABRANCHES DOWN..POLE FIRES..POWER OUTAGES
May 26, 9:00 PM EDTTSTM WND DMGAlbany Twp, PASIDE OF UNUSED BARN BLOWN OUT... TWO ROOFS DAMAGED... TREES AND POWER LINES DOWN.
May 26, 9:02 PM EDTTSTM WND GST 62Towamensing Twp, PAIN UPPER TOWAMENSING TWNSHP
May 26, 9:03 PM EDTTSTM WND DMGPalmerton, PATREE ON A CAR WITH ENTRAPMENT
May 26, 9:13 PM EDTHAIL 1Lehigh Twp, PA
May 26, 9:16 PM EDTTSTM WND DMGBrodheadsville, PATREES AND BRANCHES DOWN. MANY POWER OUTAGES.
May 26, 9:16 PM EDTTSTM WND DMGScotrun, PATREES AND LIMBS DOWN. MANY POWER OUTAGES.
May 26, 9:19 PM EDTTSTM WND GST 60Mount Pocono, PAKMPO ASOS TSB 909P

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.8 hours before the alert went out and 236 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 2011-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1038 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 2011-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 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
1038 J/kg
Mixed-layer CIN
-241 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

099 
WUUS51 KPHI 270046
SVRPHI
PAC011-025-077-089-095-270145-
/O.NEW.KPHI.SV.W.0070.110527T0046Z-110527T0145Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
  NORTHWESTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  NORTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF LEHIGHTON...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...

* UNTIL 945 PM EDT

* AT 843 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG 
A LINE EXTENDING FROM 14 MILES NORTHWEST OF WEATHERLY TO 
WANAMAKERS...OR ALONG A LINE EXTENDING FROM 17 MILES SOUTHWEST OF 
WILKES-BARRE TO 14 MILES SOUTHWEST OF LEHIGHTON...AND MOVING EAST AT 
45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  NEW TRIPOLI...NEW MAHONING AND NESQUEHONING AROUND 850 PM EDT...
  JIM THORPE...JORDAN VALLEY...WEATHERLY AND LEHIGHTON AROUND 855 PM
  EDT...
  WALNUTPORT...NEFFS AND EMERALD AROUND 900 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 4083 7512 4059 7596 4065 7599 4074 7578
      4084 7594 4091 7600 4098 7584 4100 7575
      4105 7578 4110 7577 4114 7570 4113 7564
      4123 7555 4125 7548 4124 7535
TIME...MOT...LOC 0044Z 248DEG 40KT 4105 7605 4067 7585

$$

RPW
2 follow-up statements
414 
WWUS51 KPHI 270105
SVSPHI

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

PAC011-270114-
/O.CAN.KPHI.SV.W.0070.000000T0000Z-110527T0145Z/
BERKS PA-
905 PM EDT THU MAY 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BERKS COUNTY IS
CANCELLED...

THE THUNDERSTORMS HAVED MOVED OUT OF THE AREA.

LAT...LON 4083 7512 4063 7581 4072 7577 4074 7578
      4086 7586 4095 7592 4098 7584 4100 7575
      4105 7578 4110 7577 4114 7570 4113 7564
      4123 7555 4125 7548 4124 7535
TIME...MOT...LOC 0104Z 248DEG 40KT 4109 7575 4072 7556

$$

PAC025-077-089-095-270145-
/O.CON.KPHI.SV.W.0070.000000T0000Z-110527T0145Z/
LEHIGH PA-NORTHAMPTON PA-CARBON PA-MONROE PA-
905 PM EDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR MONROE...CARBON...NORTHERN NORTHAMPTON AND NORTHWESTERN LEHIGH
COUNTIES...

AT 900 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM WHITE HAVEN TO NEFFS...OR ALONG A LINE EXTENDING FROM 
12 MILES SOUTH OF WILKES-BARRE TO 10 MILES SOUTHEAST OF 
LEHIGHTON...MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  PENN FOREST RESERVOIR...BEERSVILLE AND ALBRIGHTSVILLE BY 910 PM
  EDT...
  MECKESVILLE...LAKE HARMONY...JONAS AND BLAKESLEE BY 915 PM EDT...
  ROSSLAND...POCONO RACEWAY AND LONG POND BY 920 PM EDT...

LAT...LON 4083 7512 4063 7581 4072 7577 4074 7578
      4086 7586 4095 7592 4098 7584 4100 7575
      4105 7578 4110 7577 4114 7570 4113 7564
      4123 7555 4125 7548 4124 7535
TIME...MOT...LOC 0104Z 248DEG 40KT 4109 7575 4072 7556

$$

RPW
502 
WWUS51 KPHI 270126
SVSPHI

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

PAC077-270134-
/O.CAN.KPHI.SV.W.0070.000000T0000Z-110527T0145Z/
LEHIGH PA-
926 PM EDT THU MAY 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LEHIGH COUNTY IS
CANCELLED...

THE THUNDERSTORMS HAVE MOVED OUT OF THE AREA.

LAT...LON 4083 7512 4072 7551 4109 7569 4113 7565
      4113 7564 4123 7555 4125 7548 4124 7535
TIME...MOT...LOC 0124Z 248DEG 40KT 4117 7547 4080 7529

$$

PAC025-089-095-270145-
/O.CON.KPHI.SV.W.0070.000000T0000Z-110527T0145Z/
NORTHAMPTON PA-CARBON PA-MONROE PA-
926 PM EDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR MONROE...NORTHEASTERN CARBON AND NORTHERN NORTHAMPTON COUNTIES...

AT 921 PM EDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH WAS LOCATED ALONG A LINE FROM 
POCONO PINES TO CHAPMAN...OR ALONG A LINE EXTENDING FROM 8 MILES 
WEST OF MOUNT POCONO TO 9 MILES NORTHWEST OF EASTON...MOVING EAST AT 
45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  TOBYHANNA...STORMVILLE...SCOTRUN AND REEDERS BY 930 PM EDT...
  EAST BANGOR BY 935 PM EDT...

LAT...LON 4083 7512 4072 7551 4109 7569 4113 7565
      4113 7564 4123 7555 4125 7548 4124 7535
TIME...MOT...LOC 0124Z 248DEG 40KT 4117 7547 4080 7529

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 8:11 PM EDTSevere Thunderstorm WarningPHIBerks48 min
May 26, 8:50 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh, Northampton55 min
May 26, 9:44 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton61 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.