Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 277, NWS Philadelphia/Mount Holly

December 1, 2006Berks County, Carbon County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Dec 1, 2006, 4:27 PM EST for Berks County, Carbon County, Lehigh County, Pennsylvania. It was in force for 78 min. 10 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: Dec 1, 2006, 4:27 PM EST (21:27 UTC)
Expired: Dec 1, 2006, 5:45 PM EST
In force: 78 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Berks County, PA, Carbon County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 162 km from the middle of the area, began a volume at 21:29 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

Time	Report	Where	Remark
Dec 1, 4:42 PM EST	NON-TSTM WND GST 44	Allentown, PA	A 44 MPH WIND GUST WAS MEASURED AT THE LEHIGH VALLEY INTERNATIONAL AIRPORT.
Dec 1, 4:53 PM EST	TSTM WND DMG	Minersville, PA	TREES AND WIRES DOWN
Dec 1, 4:57 PM EST	TSTM WND DMG	Schuylkill Haven, PA	TREES AND WIRES DOWN
Dec 1, 5:00 PM EST	TSTM WND DMG	Hometown, PA	TREES AND WIRES DOWN
Dec 1, 5:00 PM EST	TSTM WND DMG	Reading, PA	TREES AND WIRES REPORTED DOWN COUNTYWIDE.
Dec 1, 5:04 PM EST	NON-TSTM WND GST 51	Allentown, PA	A 51 MPH WIND GUST WAS MEASURED AT THE LEHIGH VALLEY INTERNATIONAL AIRPORT.
Dec 1, 5:14 PM EST	TSTM WND GST 46	Reading, PA	A 46 MPH WIND GUST WAS MEASURED AT THE READING AIRPORT.
Dec 1, 5:20 PM EST	TSTM WND DMG	Jim Thorpe, PA	A BUILDING ON A CONSTRUCTION SITE WAS DAMAGED, AND SCAFFOLDING WAS BROUGHT DOWN.
Dec 1, 5:20 PM EST	NON-TSTM WND DMG	Allentown, PA	A HANGER ROOF BEING PEALED OFF AT THE LEHIGH VALLEY INTERNATIONAL AIRPORT.
Dec 1, 5:30 PM EST	TSTM WND DMG	Allentown, PA	TREES AND WIRES REPORTED DOWN COUNTYWIDE.

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.

Issued	Product	Office	Lasted
Dec 1, 3:24 PM EST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.5 hours before the alert went out and 128 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 966 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -103 m²/s²
0-3 km storm-relative helicity: 9 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.

000 
WUUS51 KPHI 012131
SVRPHI
PAC011-025-077-012245-
/O.NEW.KPHI.SV.W.0277.061201T2127Z-061201T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
427 PM EST FRI DEC 1 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BERKS COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF READING...
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF ALLENTOWN...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 545 PM EST

* AT 425 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS
  IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED IN A LINE FROM 25
  MILES NORTHWEST OF STRAUSSTOWN...OR ABOUT 30 MILES NORTHEAST OF 
  HARRISBURG...TO NEAR BERWICK...MOVING NORTHEAST AT 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES NORTHWEST OF NESQUEHONING BY 505 PM EST...
  WEATHERLY AND 9 MILES NORTHWEST OF JIM THORPE BY 510 PM EST...

TAKE SHELTER IMMEDIATELY WHEN SEVERE THUNDERSTORMS APPROACH YOUR AREA.

LAT...LON 4068 7681 4052 7669 4016 7587 4053 7536
      4075 7561 4103 7561

$$

NIERENBERG

2 follow-up statements

000 
WWUS51 KPHI 012157
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
456 PM EST FRI DEC 1 2006

PAC011-025-077-012245-
/O.CON.KPHI.SV.W.0277.000000T0000Z-061201T2245Z/
BERKS PA-LEHIGH PA-CARBON PA-
456 PM EST FRI DEC 1 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR CARBON...LEHIGH AND BERKS COUNTIES...

AT 454 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS LINE OF STORMS IS RACING
TO THE NORTHEAST AT 60 MPH.

THE LINE OF SEVERE THUNDERSTORMS WILL BE NEAR...
  TRESCKOW AND AROUND LANSFORD BY 505 PM EST...                      
  WEATHERLY...BEAVER MEADOWS...NESQUEHONING AND 7 MILES NORTHWEST    
  OF SUMMIT HILL BY 510 PM EST...
  7 MILES NORTHWEST OF JIM THORPE BY 515 PM EST...
  EAST SIDE AND 6 MILES SOUTHEAST OF WHITE HAVEN BY 520 PM EST...

THIS NARROW LINE OF STORMS HAS A HISTORY OF PRODUCING WIND DAMAGE. 
THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EST
FRIDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4068 7681 4052 7669 4016 7587 4053 7536
      4075 7561 4100 7556 4113 7567

$$

GORSE

000 
WWUS51 KPHI 012227
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
525 PM EST FRI DEC 1 2006

PAC011-025-077-012245-
/O.CON.KPHI.SV.W.0277.000000T0000Z-061201T2245Z/
BERKS PA-LEHIGH PA-CARBON PA-
525 PM EST FRI DEC 1 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR CARBON...LEHIGH AND BERKS COUNTIES...

AT 522 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
NARROW SOLID LINE OF SEVERE THUNDERSTORMS ACROSS MOST OF EASTERN 
PENNSYLVANIA, CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 
MPH. THIS LINE OF STORMS IS RACING EAST NORTHEASTWARD AT 55 MPH.

THE LINE OF SEVERE THUNDERSTORMS WILL BE NEAR...
  7 MILES SOUTH OF WEISSPORT AND 7 MILES SOUTH OF WEISSPORT EAST BY
  525 PM EST...
  SLATINGTON...SCHNECKSVILLE...PALMERTON AND BOWMANSTOWN BY 530 PM
  EST...
  8 MILES NORTH OF FULLERTON BY 535 PM EST...

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
A WIND GUST TO 63 MPH WAS REPORTED EARLIER NEAR HAZELTON IN LUZERNE 
COUNTY. 

THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

IN ADDITION TO DAMAGING WINDS, FREQUENT CLOUD TO GROUND LIGHTNING IS 
OCCURRING WITH THIS LINE OF STORMS. 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 1000 PM EST
FRIDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4052 7623 4045 7639 4016 7587 4053 7536
      4075 7561 4083 7552 4101 7557 4113 7567

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 3:54 AM EST	High Wind Warning	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	21 hr
Dec 1, 3:54 AM EST	Wind Advisory	PHI	Delaware, Philadelphia	21 hr
Dec 1, 4:49 PM EST	Severe Thunderstorm Warning	PHI	Monroe, Northampton	71 min
Dec 1, 5:07 PM EST	Tornado Warning	PHI	Monroe	38 min
Dec 1, 5:45 PM EST	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	42 min
Dec 1, 5:55 PM EST	Tornado Warning	PHI	Northampton	35 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2006 Every severe thunderstorm warning in 2006

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.