Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 144, NWS Philadelphia/Mount Holly

July 23, 20144 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2014, 7:49 PM EDT for 4 counties in Pennsylvania. It was in force for 38 min. 1 report 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: Jul 23, 2014, 7:49 PM EDT (23:49 UTC)
Expired: Jul 23, 2014, 8:27 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 23:53 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
Jul 23, 8:00 PM EDT	TSTM WND DMG	Jim Thorpe, PA	NUMEROUS TREES DOWN... WITH SOME DAMAGE TO HOUSES AND VEHICLES.

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.8 hours before the alert went out and 160 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: 697 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 737 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 37 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.

786 
WUUS51 KPHI 232349
SVRPHI
PAC025-077-089-095-240045-
/O.NEW.KPHI.SV.W.0144.140723T2349Z-140724T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
749 PM EDT WED JUL 23 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  NORTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 845 PM EDT

* AT 748 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR NESQUEHONING...MOVING EAST
  AT 30 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  JIM THORPE AND LEHIGHTON AROUND 755 PM EDT...
  BELTZVILLE STATE PARK AND PALMERTON AROUND 805 PM EDT...
  PENN FOREST RESERVOIR AND BERLINSVILLE AROUND 810 PM EDT...
  KRESGEVILLE AND DANIELSVILLE AROUND 815 PM EDT...
  KUNKLETOWN AND SUN VALLEY AROUND 820 PM EDT...
  ROSSLAND AND GILBERT AROUND 825 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS SEVERE
THUNDERSTORM. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 4104 7513 4078 7512 4077 7513 4078 7517
      4076 7519 4068 7584 4070 7585 4074 7577
      4084 7592 4091 7600 4092 7600 4100 7579
TIME...MOT...LOC 2350Z 267DEG 27KT 4087 7577

$$

FORECASTER: SFJ

2 follow-up statements

442 
WWUS51 KPHI 240008
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EDT WED JUL 23 2014

PAC025-077-089-095-240045-
/O.CON.KPHI.SV.W.0144.000000T0000Z-140724T0045Z/
LEHIGH PA-MONROE PA-CARBON PA-NORTHAMPTON PA-
808 PM EDT WED JUL 23 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR NORTHERN NORTHAMPTON...CARBON...SOUTHERN MONROE AND NORTHWESTERN
LEHIGH COUNTIES...

AT 805 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR BELTZVILLE STATE
PARK...OR 6 MILES NORTHEAST OF LEHIGHTON...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TRACHSVILLE BY 815 PM EDT...
  KRESGEVILLE AND KUNKLETOWN BY 820 PM EDT...
  FIDDLETOWN...GILBERT...BRODHEADSVILLE AND EFFORT BY 825 PM EDT...
  ROSSLAND BY 830 PM EDT...
  SAYLORSBURG BY 835 PM EDT...
  PEN ARGYL BY 840 PM EDT...

IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

LAT...LON 4104 7513 4078 7512 4077 7513 4078 7517
      4076 7519 4068 7584 4070 7585 4074 7577
      4084 7592 4091 7600 4092 7600 4100 7579
TIME...MOT...LOC 0008Z 267DEG 27KT 4088 7559

$$

SFJ

653 
WWUS51 KPHI 240027
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
827 PM EDT WED JUL 23 2014

PAC025-077-089-095-240036-
/O.CAN.KPHI.SV.W.0144.000000T0000Z-140724T0045Z/
LEHIGH PA-MONROE PA-CARBON PA-NORTHAMPTON PA-
827 PM EDT WED JUL 23 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NORTHAMPTON...
CARBON...SOUTHERN MONROE AND NORTHWESTERN LEHIGH COUNTIES IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. THEREFORE...THE 
WARNING HAS BEEN CANCELLED.

LAT...LON 4104 7513 4078 7512 4077 7513 4078 7517
      4076 7519 4068 7584 4070 7585 4074 7577
      4084 7592 4091 7600 4092 7600 4100 7579
TIME...MOT...LOC 0026Z 267DEG 27KT 4089 7541

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 4:33 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	57 min
Jul 23, 4:42 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	48 min
Jul 23, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	58 min
Jul 23, 5:25 PM EDT	Special Weather Statement	PHI	Monroe	50 min
Jul 23, 6:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	61 min
Jul 23, 7:09 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	51 min
Jul 23, 7:25 PM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Monroe, Northampton	65 min
Jul 23, 7:59 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	61 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2014 Every severe thunderstorm warning in 2014

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.