Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 88, NWS Philadelphia/Mount Holly

June 5, 2011Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 5, 2011, 8:06 PM EDT for Berks County, Pennsylvania. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 5, 2011, 8:06 PM EDT (00:06 UTC)
Expired
Jun 5, 2011, 8:45 PM EDT
In force
39 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Berks County, PA

The radar

The State College radar (KCCX), 154 km from the middle of the area, began a volume at 00:08 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 191 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 2011-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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 00:00Z on 2011-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
10 J/kg
Mixed-layer CIN
-197 J/kg
Mixed-layer LCL
1814 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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.

542 
WUUS51 KPHI 060006
SVRPHI
PAC011-060045-
/O.NEW.KPHI.SV.W.0088.110606T0006Z-110606T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
806 PM EDT SUN JUN 5 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 845 PM EDT

* AT 801 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 12 MILES NORTHWEST OF
  STRAUSSTOWN...OR 29 MILES NORTHWEST OF READING...AND MOVING SOUTH
  AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES WEST OF STRAUSSTOWN AROUND 820 PM EDT...
  WOMELSDORF AROUND 840 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 4052 7637 4052 7630 4054 7620 4026 7606
      4030 7614 4036 7621 4036 7624 4047 7640
      4049 7644 4050 7644
TIME...MOT...LOC 0006Z 342DEG 23KT 4055 7637

$$

HAYES
2 follow-up statements
930 
WWUS51 KPHI 060019
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
819 PM EDT SUN JUN 5 2011

PAC011-060045-
/O.CON.KPHI.SV.W.0088.000000T0000Z-110606T0045Z/
BERKS PA-
819 PM EDT SUN JUN 5 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR WEST CENTRAL BERKS COUNTY...

AT 818 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 8 MILES WEST OF STRAUSSTOWN...OR 24 MILES NORTHWEST OF
READING...MOVING SOUTH AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOMELSDORF BY 840 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 4052 7637 4052 7630 4054 7620 4026 7606
      4030 7614 4036 7621 4036 7624 4047 7640
      4049 7644 4050 7644
TIME...MOT...LOC 0020Z 342DEG 23KT 4046 7633

$$

HAYES
215 
WWUS51 KPHI 060040
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
840 PM EDT SUN JUN 5 2011

PAC011-060050-
/O.EXP.KPHI.SV.W.0088.000000T0000Z-110606T0045Z/
BERKS PA-
840 PM EDT SUN JUN 5 2011

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL BERKS COUNTY WILL
EXPIRE AT 845 PM EDT...

THE STORM THAT PROMPTED THE WARNING WILL MOVE OUT OF THE AREA BY 845 
PM.

LAT...LON 4052 7637 4052 7630 4054 7620 4026 7606
      4030 7614 4036 7621 4036 7624 4047 7640
      4049 7644 4050 7644
TIME...MOT...LOC 0040Z 342DEG 23KT 4034 7628

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 8:16 PM EDTSpecial Weather StatementPHICarbon, Lehigh, Northampton59 min
Jun 6, 1:46 PM EDTExcessive Heat WatchPHIDelaware, Philadelphia25 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.