Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 114, NWS Philadelphia/Mount Holly

November 1, 20134 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 1, 2013, 6:45 AM EDT for 4 counties in Pennsylvania. It was in force for 75 min. 2 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: Nov 1, 2013, 6:45 AM EDT (10:45 UTC)
Expired: Nov 1, 2013, 8:00 AM EDT
In force: 75 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Binghamton radar (KBGM), 149 km from the middle of the area, began a volume at 10:45 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
Nov 1, 7:45 AM EDT	TSTM WND DMG	Jim Thorpe, PA	NUMEROUS REPORTS OF TREES AND POWER LINES ACROSS THE COUNTY.
Nov 1, 7:45 AM EDT	TSTM WND DMG	Jim Thorpe, PA	NUMEROUS REPORTS OF TREES AND POWER LINES ACROSS THE COUNTY.

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
Nov 1, 6:25 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 10.8 hours before the alert went out and 251 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: 5 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 324 m²/s²
0-3 km storm-relative helicity: 479 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.

037 
WUUS51 KPHI 011045
SVRPHI
PAC011-025-077-089-011200-
/O.NEW.KPHI.SV.W.0114.131101T1045Z-131101T1200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
645 AM EDT FRI NOV 1 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  NORTHWESTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  NORTHWESTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 800 AM EDT

* AT 642 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A LINE OF SHOWERS AND ISOLATED THUNDERSTORMS PRODUCING DAMAGING 
  WINDS. THESE SEVERE STORMS EXTENDED FROM   SHAMOKIN 
  TO LAWN...MOVING EAST AT 45 MPH. THESE STORMS ARE CAPABLE
  OF PRODUCING DAMAGING WINDS TO AROUND 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WEATHERLY AND STRAUSSTOWN AROUND 740 AM EDT...
  NESQUEHONING AROUND 745 AM EDT...
  WOMELSDORF AROUND 750 AM EDT...
  LAKE HARMONY AND BLAKESLEE AROUND 755 AM EDT...
  MECKESVILLE AND SHOEMAKERSVILLE AROUND 800 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SHOWERS AND THUNDERSTORMS HAS A HISTORY OF PRODUCING 
WIND DAMAGE IN MORE WESTERN PARTS OF PENNSYLVANIA.
 
THIS SEVERE THUNDERSTORM MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT
WAIT TO HEAR THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
FRIDAY MORNING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4052 7637 4052 7625 4058 7603 4065 7599
      4071 7581 4074 7577 4092 7600 4100 7575
      4102 7574 4105 7578 4110 7576 4114 7569
      4113 7564 4120 7557 4125 7543 4125 7525
      4125 7524 4027 7609 4049 7644
TIME...MOT...LOC 1044Z 252DEG 38KT 4082 7653 4017 7706

$$

TFG

1 follow-up statement

655 
WWUS51 KPHI 011139
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
739 AM EDT FRI NOV 1 2013

PAC011-025-077-089-011200-
/O.CON.KPHI.SV.W.0114.000000T0000Z-131101T1200Z/
BERKS PA-LEHIGH PA-MONROE PA-CARBON PA-
739 AM EDT FRI NOV 1 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM EDT
FOR CARBON...NORTHWESTERN MONROE...NORTHWESTERN LEHIGH AND WESTERN
BERKS COUNTIES...

AT 735 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF HEAVY SHOWERS AND ISOLATED THUNDERSTORMS CAPABLE 
OF PRODUCING DAMAGING WINDS TO 60 MPH. THIS LINE EXTENDED FROM 
WEATHERLY TO 8 MILES SOUTHWEST OF WOMELSDORF...MOVING EAST AT
45 MPH. THERE IS LITTLE TO NO LIGHTNING BEING DETECTED WITH THIS 
LINE, HOWEVER VERY STRONG WINDS JUST ABOVE THE SURFACE CAN MIX DOWN 
WITH THE LINE AS IT MOVES THROUGH.

THE LINE WILL BE NEAR...
JIM THORPE AND NEW MAHONING AROUND 745 AM EDT...
LAKE HARMONY AND BLAKESLEE AROUND 750 AM EDT...
LONG POND AND POCONO RACEWAY AROUND 755 AM EDT...
MOUNT POCONO AND TOBYHANNA AROUND 800 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE MAY CONTAIN LITTLE OR NO LIGHTNING. DO NOT WAIT TO HEAR 
THUNDER BEFORE TAKING COVER. SEEK SHELTER IMMEDIATELY INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
FRIDAY MORNING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4052 7637 4052 7625 4058 7603 4065 7599
      4071 7581 4074 7577 4092 7600 4100 7575
      4102 7574 4105 7578 4110 7576 4114 7569
      4113 7564 4120 7557 4125 7543 4125 7525
      4125 7524 4027 7609 4049 7644
TIME...MOT...LOC 1136Z 252DEG 38KT 4098 7574 4033 7628

$$

FORECASTER: GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 1, 2:21 AM EDT	Special Weather Statement	PHI	Lehigh, Northampton	84 min
Nov 1, 3:14 AM EDT	Wind Advisory	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	9 hr
Nov 1, 7:53 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more	67 min
Nov 1, 8:37 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	68 min
Nov 1, 9:11 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	79 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every severe thunderstorm warning in 2013

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.