Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 64, NWS Philadelphia/Mount Holly

July 2, 2014Bucks County, Pennsylvania; Hunterdon County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2014, 5:23 PM EDT for Bucks County, Pennsylvania; Hunterdon County, New Jersey. It was in force for 67 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: Jul 2, 2014, 5:23 PM EDT (21:23 UTC)
Expired: Jul 2, 2014, 6:30 PM EDT
In force: 67 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Hunterdon County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 21:26 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 2, 5:30 PM EDT	TSTM WND DMG	Flemington, NJ	TREES DOWN IN FLEMINTON
Jul 2, 5:30 PM EDT	TSTM WND DMG	Frenchtown, NJ	TREES DOWN
Jul 2, 5:30 PM EDT	TSTM WND DMG	Raritan Twp, NJ	TREES DOWN IN RARITAN TWP

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 2, 1:22 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.4 hours before the alert went out and 158 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: 1420 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

799 
WUUS51 KPHI 022123
SVRPHI
NJC019-PAC017-022230-
/O.NEW.KPHI.SV.W.0064.140702T2123Z-140702T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
523 PM EDT WED JUL 2 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  NORTH CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...

* UNTIL 630 PM EDT

* AT 521 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR ERWINNA...MOVING EAST AT 15
  MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FRENCHTOWN AND MILFORD AROUND 530 PM EDT...
  SERGEANTSVILLE AROUND 545 PM EDT...
  SAND BROOK AROUND 550 PM EDT...
  FLEMINGTON AND CLINTON AROUND 605 PM EDT...
  GLEN GARDNER AROUND 610 PM EDT...
  ANNANDALE AND HIGH BRIDGE AROUND 615 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
WEDNESDAY EVENING FOR NORTHEASTERN PENNSYLVANIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT WEDNESDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 4053 7476 4051 7477 4051 7479 4047 7477
      4046 7477 4039 7517 4056 7525 4075 7485
      4054 7474
TIME...MOT...LOC 2123Z 250DEG 14KT 4051 7509

$$

FORECASTER:SFJ

2 follow-up statements

226 
WWUS51 KPHI 022209
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
609 PM EDT WED JUL 2 2014

NJC019-PAC017-022230-
/O.CON.KPHI.SV.W.0064.000000T0000Z-140702T2230Z/
HUNTERDON NJ-BUCKS PA-
609 PM EDT WED JUL 2 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTH CENTRAL BUCKS AND HUNTERDON COUNTIES...

AT 605 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 FLEMINGTON...OR 15 MILES WEST OF SOMERVILLE...MOVING
EAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEBANON BY 620 PM EDT...
  9 MILES SOUTH OF CALIFON BY 630 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 700 PM EDT
WEDNESDAY EVENING FOR EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEAST
PENNSYLVANIA.

LAT...LON 4051 7477 4051 7479 4046 7477 4039 7517
      4045 7520 4047 7520 4075 7485 4055 7474
TIME...MOT...LOC 2209Z 250DEG 14KT 4057 7487

$$

SFJ

046 
WWUS51 KPHI 022223
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
623 PM EDT WED JUL 2 2014

NJC019-PAC017-022233-
/O.EXP.KPHI.SV.W.0064.000000T0000Z-140702T2230Z/
HUNTERDON NJ-BUCKS PA-
623 PM EDT WED JUL 2 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BUCKS AND
CENTRAL HUNTERDON COUNTIES WILL EXPIRE AT 630 PM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
WEDNESDAY EVENING FOR EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEAST
PENNSYLVANIA.

LAT...LON 4051 7477 4051 7479 4046 7477 4039 7517
      4045 7520 4047 7520 4075 7485 4055 7474
TIME...MOT...LOC 2223Z 250DEG 14KT 4059 7480

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 1:10 PM EDT	Special Weather Statement	PHI	Monroe	65 min
Jul 2, 1:34 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 2, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks	58 min
Jul 2, 2:45 PM EDT	Special Weather Statement	PHI	Berks	30 min
Jul 2, 2:49 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jul 2, 3:00 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Jul 2, 3:24 PM EDT	Special Weather Statement	PHI	Bucks	66 min
Jul 2, 3:25 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	65 min
Jul 2, 3:36 PM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	46 hr
Jul 2, 3:58 PM EDT	Areal Flood Advisory	PHI	Monroe, Northampton	4 hr
Jul 2, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Monroe, Northampton	57 min
Jul 2, 4:56 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Jul 2, 5:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks	59 min
Jul 2, 5:31 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 2, 5:42 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 2, 5:56 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	49 min
Jul 2, 6:13 PM EDT	Flash Flood Warning	PHI	Bucks	4 hr
Jul 2, 6:44 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 2, 6:51 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	4 hr
Jul 2, 7:00 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Montgomery	60 min
Jul 2, 7:09 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Jul 2, 7:26 PM EDT	Special Weather Statement	PHI	Philadelphia	64 min
Jul 2, 7:32 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	58 min
Jul 2, 7:35 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	55 min
Jul 2, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	27 min
Jul 2, 7:52 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Jul 2, 3:59 AM EDT	Small Craft Advisory	PHI		18 hr
Jul 2, 2:48 PM EDT	Special Weather Statement	PHI	Sussex	42 min
Jul 2, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min
Jul 2, 4:34 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 2, 5:01 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 2, 5:08 PM EDT	Special Weather Statement	PHI	Hunterdon	52 min
Jul 2, 6:06 PM EDT	Special Weather Statement	PHI	Somerset	24 min
Jul 2, 6:31 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	42 min
Jul 2, 7:15 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Somerset	4 hr
Jul 2, 7:16 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	59 min
Jul 2, 7:58 PM EDT	Special Marine Warning	PHI		62 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2014 Severe Thunderstorm Warnings in New Jersey, 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.