Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 14, NWS Philadelphia/Mount Holly

May 26, 2012Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 26, 2012, 2:42 PM EDT for Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 48 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
May 26, 2012, 2:42 PM EDT (18:42 UTC)
Expired
May 26, 2012, 3:30 PM EDT
In force
48 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 118 km from the middle of the area, began a volume at 18:43 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
May 26, 3:00 PM EDTTSTM WND DMGHamilton Twp, PATREES DOWN IN HAMILTON TOWNSHIP.

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
May 26, 2:29 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.7 hours before the alert went out and 196 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, Brookhaven, NY at 12:00Z on 2012-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 144 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, Brookhaven, NY at 12:00Z on 2012-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
144 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
659 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
105 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.

122 
WUUS51 KPHI 261842
SVRPHI
NJC041-PAC089-095-261930-
/O.NEW.KPHI.SV.W.0014.120526T1842Z-120526T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
242 PM EDT SAT MAY 26 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  WESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 330 PM EDT

* AT 238 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE            
  HAIL...AND DAMAGING WINDS TO 60 MPH. THIS STORM WAS LOCATED        
  NEAR EAST BANGOR...OR 15 MILES NORTH OF EASTON...AND MOVING SOUTH  
  AT 15 MPH. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  EAST BANGOR AROUND 245 PM EDT...
  BANGOR AND PEN ARGYL AROUND 250 PM EDT...
  WIND GAP AROUND 255 PM EDT...
  BELFAST AROUND 320 PM EDT...
  ROXBURG AROUND 325 PM EDT...
  HARMONY...TATAMY AND FORKS AROUND 330 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW 
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4071 7498 4067 7547 4100 7548 4101 7507
TIME...MOT...LOC 1839Z 355DEG 9KT 4090 7521

$$

GORSE
2 follow-up statements
519 
WWUS51 KPHI 261909
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
309 PM EDT SAT MAY 26 2012

NJC041-PAC089-095-261930-
/O.CON.KPHI.SV.W.0014.000000T0000Z-120526T1930Z/
WARREN NJ-MONROE PA-NORTHAMPTON PA-
309 PM EDT SAT MAY 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTHERN NORTHAMPTON...SOUTHERN MONROE AND WESTERN WARREN
COUNTIES...

AT 305 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS TO 60 MPH.  THIS STORM WAS LOCATED NEAR 
PEN ARGYL...OR 14 MILES NORTH OF EASTON...MOVING SOUTH AT NEAR
10 MPH. THE STRONGEST PART OF THIS STORM IS IN SOUTHEASTERN MONROE 
COUNTY, WITH VERY LITTLE MOVEMENT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR STRONG 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.

FREQUENT 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.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4075 7499 4074 7547 4100 7548 4101 7507
TIME...MOT...LOC 1907Z 339DEG 7KT 4089 7526

$$

GORSE
526 
WWUS51 KPHI 261926
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
326 PM EDT SAT MAY 26 2012

NJC041-PAC089-095-261934-
/O.EXP.KPHI.SV.W.0014.000000T0000Z-120526T1930Z/
WARREN NJ-MONROE PA-NORTHAMPTON PA-
326 PM EDT SAT MAY 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NORTHAMPTON...
SOUTHERN MONROE AND WESTERN WARREN COUNTIES WILL EXPIRE AT 330 PM
EDT...

THE THUNDERSTORM HAS BEEN SHOWING A WEAKENING TREND, THEREFORE THE 
WARNING WILL BE ALLOWED TO EXPIRE AT 330 PM. 
 
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4075 7499 4074 7547 4100 7548 4101 7507
TIME...MOT...LOC 1924Z 339DEG 7KT 4086 7524

$$

GORSE

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 2:02 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton58 min
May 26, 2:18 PM EDTAreal Flood AdvisoryPHIMonroe, Northampton5 hr
May 26, 2:23 PM EDTAreal Flood AdvisoryPHICarbon3 hr
May 26, 2:36 PM EDTFlash Flood WarningPHIMonroe, Northampton5 hr
May 26, 2:46 PM EDTSpecial Weather StatementPHICarbon44 min
May 26, 3:15 PM EDTAreal Flood AdvisoryPHICarbon2 hr
May 26, 3:32 PM EDTFlash Flood WarningPHIMonroe, Northampton4 hr
May 26, 3:39 PM EDTSpecial Weather StatementPHIMonroe51 min
May 26, 3:40 PM EDTExcessive Heat WatchPHIDelaware, Philadelphia23 hr
May 26, 3:45 PM EDTAreal Flood AdvisoryPHICarbon3 hr
May 26, 3:48 PM EDTAreal Flood AdvisoryPHIMonroe3 hr
May 26, 3:51 PM EDTSpecial Weather StatementPHICarbon39 min
May 26, 3:54 PM EDTFlash Flood WarningPHICarbon4 hr
May 26, 4:31 PM EDTAreal Flood AdvisoryPHICarbon, Monroe, Northampton3 hr
May 26, 4:37 PM EDTSpecial Weather StatementPHICarbon, Monroe38 min
May 26, 4:54 PM EDTSpecial Weather StatementPHINorthampton51 min
May 26, 5:26 PM EDTSpecial Weather StatementPHIBucks49 min
May 26, 5:33 PM EDTFlash Flood WarningPHIMonroe114 min
May 26, 5:36 PM EDTAreal Flood AdvisoryPHILehigh, Northampton114 min
May 26, 6:02 PM EDTSpecial Weather StatementPHIBerks43 min
May 26, 6:10 PM EDTAreal Flood AdvisoryPHIBerks, Bucks, Montgomery111 min
May 26, 6:26 PM EDTSpecial Weather StatementPHIBerks49 min
May 26, 7:18 PM EDTAreal Flood AdvisoryPHIBucks60 min
May 26, 7:20 PM EDTAreal Flood AdvisoryPHIBerks, Chester59 min
May 26, 1:39 PM EDTSpecial Weather StatementPHIWarren51 min
May 26, 1:42 PM EDTSpecial Weather StatementPHISussex63 min
May 26, 2:28 PM EDTSpecial Weather StatementPHISussex62 min
May 26, 7:30 PM EDTSpecial Weather StatementPHIMiddlesex45 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012Severe Thunderstorm Warnings in New Jersey, 2012Every severe thunderstorm warning in 2012

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.