Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 168, NWS Philadelphia/Mount Holly

August 6, 2016Bucks County, Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 6, 2016, 4:59 PM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 46 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: Aug 6, 2016, 4:59 PM EDT (20:59 UTC)
Expired: Aug 6, 2016, 5:45 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bucks County, PA, Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 20:59 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
Aug 6, 5:06 PM EDT	HAIL 0.25	Salisbury Twp, PA

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.0 hours before the alert went out and 209 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: 252 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 685 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

563 
WUUS51 KPHI 062059
SVRPHI
PAC017-077-095-062145-
/O.NEW.KPHI.SV.W.0168.160806T2059Z-160806T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
459 PM EDT SAT AUG 6 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  NORTHWESTERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 545 PM EDT

* AT 459 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM BETHLEHEM TO NEAR CLAUSSVILLE...MOVING EAST AT 25
  MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  ALLENTOWN...BETHLEHEM...EMMAUS...NORTHAMPTON...QUAKERTOWN...
  HELLERTOWN...FERNDALE...RIEGELSVILLE...PLEASANT VALLEY...
  SPRINGTOWN...ZIONSVILLE...CLAUSSVILLE...SCHNECKSVILLE...REVERE...
  OTTSVILLE...LEHIGH UNIVERSITY...ERWINNA...ANCIENT OAKS...
  COFFEETOWN AND WANAMAKERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4067 7586 4069 7539 4060 7519 4057 7519
      4057 7516 4058 7514 4055 7507 4049 7506
      4047 7507 4038 7541
TIME...MOT...LOC 2059Z 291DEG 24KT 4064 7540 4062 7573 

HAIL...0.75IN
WIND...60MPH
 
$$

SFJ

3 follow-up statements

848 
WWUS51 KPHI 062120
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
520 PM EDT SAT AUG 6 2016

PAC017-077-095-062145-
/O.CON.KPHI.SV.W.0168.000000T0000Z-160806T2145Z/
NORTHAMPTON PA-LEHIGH PA-BUCKS PA-
520 PM EDT SAT AUG 6 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHWESTERN NORTHAMPTON...SOUTHEASTERN LEHIGH AND NORTHWESTERN
BUCKS COUNTIES...

AT 520 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM RIEGELSVILLE TO NEAR EMMAUS...MOVING SOUTHEAST AT 30
MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
ALLENTOWN...BETHLEHEM...EMMAUS...QUAKERTOWN...HELLERTOWN...
FERNDALE...RIEGELSVILLE...PLEASANT VALLEY...SPRINGTOWN...
ZIONSVILLE...REVERE...OTTSVILLE...LEHIGH UNIVERSITY...ERWINNA...
ANCIENT OAKS...CATASAUQUA...FOUNTAIN HILL...MACUNGIE...
NORTH CATASAUQUA AND FREEMANSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4059 7573 4069 7539 4060 7519 4057 7519
      4057 7516 4058 7514 4055 7507 4049 7506
      4047 7507 4038 7541
TIME...MOT...LOC 2120Z 292DEG 26KT 4057 7521 4055 7554 

HAIL...0.75IN
WIND...60MPH
 
$$

SFJ

467 
WWUS51 KPHI 062131
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
531 PM EDT SAT AUG 6 2016

PAC077-095-062141-
/O.CAN.KPHI.SV.W.0168.000000T0000Z-160806T2145Z/
NORTHAMPTON PA-LEHIGH PA-
531 PM EDT SAT AUG 6 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NORTHAMPTON AND
SOUTHEASTERN LEHIGH COUNTIES IS CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4051 7538 4060 7521 4060 7519 4057 7519
      4057 7516 4058 7514 4054 7507 4048 7506
      4047 7507 4038 7541 4042 7548
TIME...MOT...LOC 2131Z 290DEG 31KT 4054 7513 4049 7531 

$$

PAC017-062145-
/O.CON.KPHI.SV.W.0168.000000T0000Z-160806T2145Z/
BUCKS PA-
531 PM EDT SAT AUG 6 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHWESTERN BUCKS COUNTY...

AT 531 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR REVERE TO NEAR PLEASANT VALLEY...MOVING EAST AT
35 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
QUAKERTOWN...FERNDALE...RIEGELSVILLE...PLEASANT VALLEY...REVERE...
ERWINNA...OTTSVILLE...SPRINGTOWN...COOPERSBURG...
RICHLANDTOWN AND TRUMBAUERSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4051 7538 4060 7521 4060 7519 4057 7519
      4057 7516 4058 7514 4054 7507 4048 7506
      4047 7507 4038 7541 4042 7548
TIME...MOT...LOC 2131Z 290DEG 31KT 4054 7513 4049 7531 

HAIL...0.75IN
WIND...60MPH
 
$$

SFJ

205 
WWUS51 KPHI 062138
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
538 PM EDT SAT AUG 6 2016

PAC017-062148-
/O.EXP.KPHI.SV.W.0168.000000T0000Z-160806T2145Z/
BUCKS PA-
538 PM EDT SAT AUG 6 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BUCKS COUNTY WILL
EXPIRE AT 545 PM EDT...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER GUSTY
WINDS TO 40 MPH ARE STILL POSSIBLE WITH THESE THUNDERSTORMS.

LAT...LON 4051 7538 4060 7521 4060 7519 4057 7519
      4057 7516 4058 7514 4054 7507 4048 7506
      4047 7507 4038 7541 4042 7548
TIME...MOT...LOC 2135Z 291DEG 24KT 4054 7513 4049 7531 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 2:24 PM EDT	Special Weather Statement	PHI	Monroe	36 min
Aug 6, 2:50 PM EDT	Special Weather Statement	PHI	Northampton	40 min
Aug 6, 3:21 PM EDT	Special Weather Statement	PHI	Northampton	39 min
Aug 6, 4:26 PM EDT	Special Weather Statement	PHI	Lehigh	34 min
Aug 6, 4:30 PM EDT	Special Weather Statement	PHI	Berks	30 min
Aug 6, 4:51 PM EDT	Special Weather Statement	PHI	Montgomery	24 min
Aug 6, 4:55 PM EDT	Special Weather Statement	PHI	Lehigh	35 min
Aug 6, 5:26 PM EDT	Special Weather Statement	PHI	Berks	34 min
Aug 6, 5:40 PM EDT	Special Weather Statement	PHI	Bucks	50 min
Aug 6, 5:56 PM EDT	Special Weather Statement	PHI	Montgomery	34 min
Aug 6, 6:25 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	35 min
Aug 6, 6:32 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2016 Every severe thunderstorm warning in 2016

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.