Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 17, NWS Philadelphia/Mount Holly

May 29, 2012Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 29, 2012, 5:45 PM EDT for Monroe County, Northampton County, Pennsylvania. It was in force for 75 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: May 29, 2012, 5:45 PM EDT (21:45 UTC)
Expired: May 29, 2012, 7:00 PM EDT
In force: 75 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 135 km from the middle of the area, began a volume at 21:46 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
May 29, 6:15 PM EDT	TSTM WND DMG	Brodheadsville, PA	A COUPLE OF TREES DOWN
May 29, 6:15 PM EDT	TSTM WND DMG	Jackson Twp, PA	A FEW DOWNED TREES AND POWER LINES.
May 29, 6:20 PM EDT	HAIL 0.5	Saylorsburg, PA
May 29, 6:30 PM EDT	TSTM WND DMG	Bangor, PA	AS MANY AS 16 UTILITY POLES DOWN IN BANGOR BOROUGH. MULTIPLE LOCAL ROAD CLOSURES.
May 29, 6:30 PM EDT	TSTM WND DMG	Bushkill Twp, PA	TREE ONTO WIRES WITH THE TREE ON FIRE.
May 29, 6:30 PM EDT	TSTM WND DMG	Lower Mount Bethel Twp, PA	MULTIPLE TREES DOWN ACROSS THE TOWNSHIP.
May 29, 6:30 PM EDT	TSTM WND DMG	Plainfield Twp, PA	STRONG WINDS DAMAGED A BARN IN PLAINFIELD TOWNSHIP INCLUDING THE ROOF STRIPPED AWAY.
May 29, 6:30 PM EDT	TSTM WND DMG	Washington Twp, PA	TREE FELL ACROSS ROADWAY... BLOCKING IT.
May 29, 6:30 PM EDT	TSTM WND DMG	Wilson, PA	WIRES DOWN IN WILSON... BANGOR AND NAZARETH
May 29, 6:30 PM EDT	TSTM WND DMG	Wind Gap, PA	WIRES DOWN.

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
May 29, 1:03 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.8 hours before the alert went out and 176 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: 667 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: -10 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.

357 
WUUS51 KPHI 292145
SVRPHI
PAC089-095-292300-
/O.NEW.KPHI.SV.W.0017.120529T2145Z-120529T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
545 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF EASTON...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...

* UNTIL 700 PM EDT

* AT 542 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR WALNUTPORT...OR 8 MILES 
  EAST OF LEHIGHTON...AND MOVING EAST AT 25 MPH. A SECOND RAPIDLY
  DEVELOPING THUNDERSTORM IN ALBRIGHTSVILLE IN CARBON COUNTY COULD
  ALSO BECOME SEVERE ACROSS NORTHERN MONROE COUNTY. 

* THE FIRST SEVERE THUNDERSTORM WILL BE NEAR...
  BEERSVILLE AROUND 550 PM EDT...
  BEERSVILLE AROUND 555 PM EDT...
  ROSSLAND AROUND 605 PM EDT...
  WIND GAP AND SAYLORSBURG AROUND 615 PM EDT...
  BELFAST AROUND 620 PM EDT...
  PEN ARGYL AROUND 625 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

STORMS TODAY HAVE HAD A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND 
LARGE DAMAGING 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 900 PM EDT
TUESDAY EVENING FOR NORTHEASTERN PENNSYLVANIA.

&&

LAT...LON 4115 7514 4115 7508 4109 7503 4109 7497
      4099 7513 4086 7505 4077 7513 4075 7519
      4066 7519 4070 7551 4074 7554 4073 7554
      4075 7560 4080 7559 4082 7547 4094 7557
      4099 7550 4112 7565 4123 7554 4126 7513
TIME...MOT...LOC 2144Z 263DEG 21KT 4082 7554

$$

TFG

2 follow-up statements

913 
WWUS51 KPHI 292209
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
609 PM EDT TUE MAY 29 2012

PAC089-095-292300-
/O.CON.KPHI.SV.W.0017.000000T0000Z-120529T2300Z/
MONROE PA-NORTHAMPTON PA-
609 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHAMPTON AND MONROE COUNTIES...

AT 607 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 6 MILES WEST OF ROSSLAND...OR 11 MILES EAST OF LEHIGHTON...
MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GILBERT BY 620 PM EDT...
  ROSSLAND AND BRODHEADSVILLE BY 625 PM EDT...
  SAYLORSBURG AND WIND GAP BY 635 PM EDT...
  PEN ARGYL BY 645 PM EDT...
  ROSETO...BANGOR AND STORMVILLE BY 650 PM EDT...
  EAST BANGOR BY 655 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE 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.

OTHER STRONG THUNDERSTORMS WERE MOVING ACROSS CENTRAL MONROE COUNTY.

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 900 PM EDT
TUESDAY EVENING FOR NORTHEASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT TUESDAY EVENING FOR
NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.

&&

LAT...LON 4115 7514 4115 7508 4109 7503 4109 7497
      4099 7513 4086 7505 4077 7513 4075 7519
      4066 7519 4070 7551 4074 7554 4073 7554
      4075 7560 4080 7559 4082 7547 4094 7557
      4099 7550 4112 7565 4123 7554 4126 7513
TIME...MOT...LOC 2209Z 254DEG 19KT 4084 7549

$$

TFG

832 
WWUS51 KPHI 292236
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
636 PM EDT TUE MAY 29 2012

PAC089-095-292300-
/O.CON.KPHI.SV.W.0017.000000T0000Z-120529T2300Z/
MONROE PA-NORTHAMPTON PA-
636 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHAMPTON AND EASTERN MONROE COUNTIES...

AT 633 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
MOUNTAINHOME TO REEDERS TO ROSSLAND...OR ALONG A LINE EXTENDING FROM
7 MILES NORTHEAST OF MOUNT POCONO TO 7 MILES SOUTH OF MOUNT POCONO TO
14 MILES EAST OF LEHIGHTON...MOVING EAST AT 20 MPH.

ANOTHER SEVERE THUNDERSTORM WAS OVER STORMVILLE IN EASTERN NORTHAMPTON
COUNTY.

SEVERE THUNDERSTORMS WILL BE NEAR...
  NAZARETH...SAYLORSBURG AND ANALOMINK BY 645 PM EDT...
  PALMER HEIGHTS...EASTLAWN GARDENS AND ARLINGTON HEIGHTS BY 650 PM
  EDT...
  FORKS...WILSON...WEST EASTON AND TATAMY BY 655 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

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 900 PM EDT
TUESDAY EVENING FOR NORTHEASTERN PENNSYLVANIA.

&&

LAT...LON 4115 7514 4114 7507 4109 7503 4109 7497
      4097 7514 4086 7505 4085 7510 4083 7508
      4077 7513 4078 7517 4075 7519 4066 7520
      4070 7550 4074 7554 4075 7560 4080 7559
      4082 7547 4125 7529 4126 7515 4126 7513
TIME...MOT...LOC 2236Z 254DEG 19KT 4118 7524 4102 7529
          4083 7543

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 12:29 PM EDT	Flash Flood Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	8 hr
May 29, 1:36 PM EDT	Special Weather Statement	PHI	Monroe	54 min
May 29, 1:50 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	115 min
May 29, 5:06 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	114 min
May 29, 5:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	95 min
May 29, 6:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	91 min
May 29, 6:23 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	112 min
May 29, 6:44 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery	3 hr
May 29, 6:46 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	89 min
May 29, 6:52 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	53 min
May 29, 7:34 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	56 min
May 29, 7:35 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	115 min
May 29, 7:44 PM EDT	Special Weather Statement	PHI	Bucks	61 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012 Every 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.