Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 53, NWS Philadelphia/Mount Holly

June 10, 2008Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 10, 2008, 5:51 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 54 min. 7 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
Jun 10, 2008, 5:51 PM EDT (21:51 UTC)
Expired
Jun 10, 2008, 6:45 PM EDT
In force
54 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 128 km from the middle of the area, began a volume at 21:51 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 10, 6:00 PM EDTHAIL 1Fleetwood, PANICKEL TO QUARTER SIZE HAIL IN FLEETWOOD.
Jun 10, 6:05 PM EDTHAIL 1Fleetwood, PANICKEL TO QUARTER SIZE HAIL IN FLEETWOOD.
Jun 10, 6:05 PM EDTHAIL 1N Fleetwood, PANICKEL TO QUARTER SIZE HAIL IN FLEETWOOD.
Jun 10, 6:29 PM EDTHAIL 15 Sse Claussville, PAQUARTER SIZE HAIL IN BREINIGSVILLE.
Jun 10, 6:30 PM EDTHAIL 0.75Topton, PAPENNY SIZE HAIL NEAR TOPTON.
Jun 10, 6:40 PM EDTHAIL 0.75Topton, PAPENNY SIZE HAIL NEAR TOPTON.
Jun 10, 6:42 PM EDTHAIL 15 Sse Claussville, PAQUARTER SIZE HAIL IN BREINIGSVILLE.

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 10, 5:47 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.9 hours before the alert went out and 135 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 2008-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1286 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2008-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
1286 J/kg
Mixed-layer CIN
-135 J/kg
Mixed-layer LCL
1568 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 102151
SVRPHI
PAC011-077-102245-
/O.NEW.KPHI.SV.W.0053.080610T2151Z-080610T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
551 PM EDT TUE JUN 10 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 645 PM EDT

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND     
  DAMAGING WINDS TO 60 MPH.  THIS STORM WAS LOCATED NEAR             
  FLEETWOOD...OR ABOUT 6 MILES NORTHEAST OF READING...AND MOVING     
  NORTHEAST AT 23 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KUTZTOWN BY 610 PM...
  6 MILES NORTHWEST OF ANCIENT OAKS BY 625 PM...
  CLAUSSVILLE BY 630 PM...
  SCHNECKSVILLE BY 640 PM...
  NEFFS AND 8 MILES NORTHWEST OF ALLENTOWN BY 645 PM...

EXPECT FREQUENT CLOUD TO GROUND LIGHTNING WITH THIS STORM.

LAT...LON 4074 7563 4073 7561 4072 7555 4065 7550
      4066 7544 4062 7540 4034 7587 4042 7599
TIME...MOT...LOC 2151Z 220DEG 20KT 4044 7584

$$

GORSE
2 follow-up statements
000 
WWUS51 KPHI 102203
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
602 PM EDT TUE JUN 10 2008

PAC011-077-102245-
/O.CON.KPHI.SV.W.0053.000000T0000Z-080610T2245Z/
BERKS PA-LEHIGH PA-
602 PM EDT TUE JUN 10 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR CENTRAL LEHIGH AND CENTRAL BERKS COUNTIES...

AT 600 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE 
HAIL...AND DAMAGING WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR 
LYONS...OR 13 MILES NORTHEAST OF READING...MOVING NORTHEAST AT
23 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TOPTON BY 610 PM EDT...
  6 MILES NORTHWEST OF ALBURTIS BY 620 PM EDT...
  ANCIENT OAKS BY 625 PM EDT...
  CLAUSSVILLE BY 630 PM EDT...
  SCHNECKSVILLE...NEFFS AND 7 MILES NORTHWEST OF ALLENTOWN BY 640 PM
  EDT...
  FULLERTON AND 6 MILES WEST OF CATASAUQUA BY 645 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT FOR 
THE AREA.

LAT...LON 4074 7563 4073 7561 4072 7555 4065 7550
      4066 7544 4062 7540 4035 7586 4044 7596
TIME...MOT...LOC 2202Z 220DEG 20KT 4049 7577

$$

GORSE
000 
WWUS51 KPHI 102211
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
610 PM EDT TUE JUN 10 2008

PAC011-077-102245-
/O.CON.KPHI.SV.W.0053.000000T0000Z-080610T2245Z/
BERKS PA-LEHIGH PA-
610 PM EDT TUE JUN 10 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR CENTRAL LEHIGH AND NORTHEASTERN BERKS COUNTIES...

AT 608 PM EDT...A TRAINED WEATHER SPOTTER REPORTED QUARTER SIZE 
HAIL IN FLEETWOOD. THIS STORM WAS LOCATED NEAR KUTZTOWN...OR 15 
MILES WEST OF ALLENTOWN...MOVING NORTHEAST AT 23 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES NORTHWEST OF ALBURTIS BY 620 PM EDT...
  ANCIENT OAKS BY 625 PM EDT...
  CLAUSSVILLE BY 630 PM EDT...
  SCHNECKSVILLE BY 640 PM EDT...
  NEFFS...FULLERTON...6 MILES WEST OF CATASAUQUA AND 7 MILES
  NORTHWEST OF ALLENTOWN BY 645 PM EDT...

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

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT FOR 
THE AREA.

LAT...LON 4074 7563 4073 7561 4072 7555 4065 7550
      4066 7544 4062 7540 4035 7586 4044 7596
TIME...MOT...LOC 2210Z 220DEG 20KT 4052 7574

$$

GORSE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 5:47 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe58 min
Jun 10, 6:20 PM EDTSevere Thunderstorm WarningPHIMonroe40 min
Jun 10, 6:42 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh59 min
Jun 10, 6:47 PM EDTFlash Flood WarningPHIBerks, Lehigh3 hr
Jun 10, 6:57 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe, Northampton48 min
Jun 10, 7:02 PM EDTSevere Thunderstorm WarningPHIChester58 min
Jun 10, 7:13 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton77 min
Jun 10, 7:36 PM EDTSevere Thunderstorm WarningPHIBucks, Chester, Montgomery54 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008

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.