Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 111, NWS Philadelphia/Mount Holly

July 9, 2014Carbon County, Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2014, 5:07 PM EDT for Carbon County, Monroe County, Northampton County, Pennsylvania. It was in force for 53 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: Jul 9, 2014, 5:07 PM EDT (21:07 UTC)
Expired: Jul 9, 2014, 6:00 PM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 21:07 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 9, 5:52 PM EDT	HAIL 1	Bath, PA	NICKEL TO QUARTER SIZE HAIL REPORTED IN BATH.
Jul 9, 5:53 PM EDT	HAIL 1.5	Moore Twp, PA	1.5 INCH HAIL IN MOORE 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.

Issued	Product	Office	Lasted
Jul 9, 4:12 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.1 hours before the alert went out and 170 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: 159 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

700 
WUUS51 KPHI 092107
SVRPHI
PAC025-089-095-092200-
/O.NEW.KPHI.SV.W.0111.140709T2107Z-140709T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
507 PM EDT WED JUL 9 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 600 PM EDT

* AT 505 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR PALMERTON...MOVING EAST AT
  45 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KUNKLETOWN AND KRESGEVILLE AROUND 515 PM EDT...
  ROSSLAND AND BRODHEADSVILLE AROUND 520 PM EDT...
  WIND GAP AND SAYLORSBURG AROUND 525 PM EDT...
  BANGOR AND PEN ARGYL AROUND 530 PM EDT...
  EAST BANGOR AND EAST STROUDSBURG AROUND 535 PM EDT...
  DELAWARE WATER GAP AROUND 540 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
WEDNESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4105 7504 4103 7505 4098 7514 4091 7507
      4082 7509 4077 7513 4077 7518 4075 7520
      4073 7518 4071 7520 4075 7560 4079 7561
      4078 7568 4092 7567
TIME...MOT...LOC 2107Z 264DEG 40KT 4082 7558

$$
 
TFG

1 follow-up statement

555 
WWUS51 KPHI 092134
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
534 PM EDT WED JUL 9 2014

PAC025-092143-
/O.CAN.KPHI.SV.W.0111.000000T0000Z-140709T2200Z/
CARBON PA-
534 PM EDT WED JUL 9 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARBON COUNTY IS
CANCELLED...

THE STORM IS ALONG THE MONROE AND NORTHAMPTON COUNTY BORDER.
 
LAT...LON 4105 7504 4103 7505 4098 7514 4090 7507
      4082 7509 4077 7513 4078 7517 4075 7520
      4073 7518 4071 7520 4079 7545 4083 7547
      4096 7545
TIME...MOT...LOC 2133Z 264DEG 40KT 4084 7532

$$

PAC089-095-092200-
/O.CON.KPHI.SV.W.0111.000000T0000Z-140709T2200Z/
MONROE PA-NORTHAMPTON PA-
534 PM EDT WED JUL 9 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHERN NORTHAMPTON AND SOUTHEASTERN MONROE COUNTIES...

AT 532 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WIND GAP...OR 12 MILES NORTHWEST OF EASTON...MOVING EAST
AT 45 MPH.

A SECOND SEVERE STORM IS JUST NORTH OF SAYLORSBURG. THIS STORM
IS LIKELY TO BE PRODUCING QUARTER SIZE HAIL.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BANGOR...PEN ARGYL...ROSETO AND EAST BANGOR BY 540 PM EDT...
  PORTLAND BY 550 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
WEDNESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4105 7504 4103 7505 4098 7514 4090 7507
      4082 7509 4077 7513 4078 7517 4075 7520
      4073 7518 4071 7520 4079 7545 4083 7547
      4096 7545
TIME...MOT...LOC 2133Z 264DEG 40KT 4084 7532

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 8:06 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery, Philadelphia	84 min
Jul 8, 8:25 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	59 min
Jul 8, 8:38 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	25 min
Jul 9, 2:04 PM EDT	Special Weather Statement	PHI	Lehigh	41 min
Jul 9, 2:40 PM EDT	Special Weather Statement	PHI	Lehigh	65 min
Jul 9, 2:48 PM EDT	Special Weather Statement	PHI	Monroe	72 min
Jul 9, 4:43 PM EDT	Special Weather Statement	PHI	Northampton	62 min
Jul 9, 5:28 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	92 min
Jul 9, 5:42 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Monroe, Northampton	48 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.