Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 80, NWS Philadelphia/Mount Holly

June 1, 2011Bucks County, Lehigh County, Northampton County, Pennsylvania; Hunterdon County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2011, 3:08 PM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 16 min. 3 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: Jun 1, 2011, 3:08 PM EDT (19:08 UTC)
Expired: Jun 1, 2011, 3:24 PM EDT
In force: 16 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 85 km from the middle of the area, began a volume at 19:08 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
Jun 1, 3:08 PM EDT	HAIL 0.75	Bethlehem, PA
Jun 1, 3:10 PM EDT	HAIL 0.5	Bethlehem, PA
Jun 1, 3:15 PM EDT	HAIL 1	Bethlehem Twp, PA

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
Jun 1, 12:58 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.1 hours before the alert went out and 167 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: 2843 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1042 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 319 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

213 
WUUS51 KPHI 011908
SVRPHI
NJC019-041-PAC017-077-095-012015-
/O.NEW.KPHI.SV.W.0080.110601T1908Z-110601T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
308 PM EDT WED JUN 1 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF ALLENTOWN...
  SOUTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF EASTON...
  HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...
  NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...

* UNTIL 415 PM EDT

* AT 304 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BETHLEHEM...OR NEAR ALLENTOWN...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SPRINGTOWN AND PLEASANT VALLEY AROUND 315 PM EDT...
  OLD ORCHARD...GLENDON AND WILSON AROUND 320 PM EDT...
  RIEGELSVILLE...FERNDALE AND EASTON AROUND 325 PM EDT...
  ALPHA AROUND 330 PM EDT...
  BLOOMSBURY AROUND 335 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4054 7475 4050 7477 4051 7548 4069 7549
      4074 7483 4073 7483 4073 7477 4071 7473
      4068 7473 4067 7472 4065 7474 4062 7471
      4059 7473 4057 7471
TIME...MOT...LOC 1908Z 267DEG 27KT 4060 7537

$$

MPD

1 follow-up statement

213 
WWUS51 KPHI 011924
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
324 PM EDT WED JUN 1 2011

NJC019-041-PAC017-077-095-011935-
/O.CAN.KPHI.SV.W.0080.000000T0000Z-110601T2015Z/
WARREN NJ-HUNTERDON NJ-LEHIGH PA-NORTHAMPTON PA-BUCKS PA-
324 PM EDT WED JUN 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BUCKS...SOUTHERN
NORTHAMPTON...EAST CENTRAL LEHIGH...NORTHERN HUNTERDON AND
SOUTHWESTERN WARREN COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4054 7475 4050 7477 4051 7548 4069 7549
      4074 7483 4073 7483 4073 7477 4071 7473
      4068 7473 4067 7472 4065 7474 4062 7471
      4059 7473 4057 7471
TIME...MOT...LOC 1925Z 267DEG 27KT 4061 7520

$$

MPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 12:56 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	60 min
Jun 1, 1:57 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	63 min
Jun 1, 2:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh	52 min
Jun 1, 4:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	45 min
Jun 1, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Chester	26 min
Jun 1, 3:26 PM EDT	Special Weather Statement	PHI	Sussex	64 min
Jun 1, 4:00 PM EDT	Small Craft Advisory	PHI		35 hr
Jun 1, 4:05 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	40 min
Jun 1, 4:31 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	59 min
Jun 1, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	61 min
Jun 1, 5:23 PM EDT	Special Weather Statement	PHI	Salem	67 min
Jun 1, 5:50 PM EDT	Special Marine Warning	PHI		40 min
Jun 1, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	64 min
Jun 1, 6:42 PM EDT	Special Marine Warning	PHI		63 min
Jun 1, 7:22 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	43 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Severe Thunderstorm Warnings in New Jersey, 2011 Every severe thunderstorm warning in 2011

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.