Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 327, NWS Philadelphia/Mount Holly

August 7, 2019Warren County, New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2019, 3:24 PM EDT for Warren County, New Jersey; 4 counties in Pennsylvania. It was in force for 51 min. 9 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: Aug 7, 2019, 3:24 PM EDT (19:24 UTC)
Expired: Aug 7, 2019, 4:15 PM EDT
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Warren County, NJ, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 19:28 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 7, 3:25 PM EDT	TSTM WND DMG	2 E Claussville, PA	TREE INTO A HOUSE. REPORTS OF WIRES DOWN IN THE AREA. TIME AND LOCATION APPROXIMATE.
Aug 7, 3:28 PM EDT	TSTM WND DMG	3 Sw West Catasauqua, PA	DOWNED TREE ON POND ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 3:28 PM EDT	HAIL 0.75	3 Sse Schnecksville, PA	HAIL UP TO PENNY SIZE.
Aug 7, 3:40 PM EDT	TSTM WND DMG	Betlehem, PA	MULTIPLE REPORTS OF TREES DOWN AROUND BETHLEHEM. DELAYED REPORT.
Aug 7, 3:47 PM EDT	TSTM WND DMG	Upper Saucon Twp, PA	DOWNED TREES AND WIRES REPORTED. TIME ESTIMATED FROM RADAR.
Aug 7, 3:48 PM EDT	TSTM WND DMG	1 N Center Valley, PA	MPING REPORT OF TREES UPROOTED OR SNAPPED. TIME ESTIMATED FROM RADAR AND NEARBY REPORTS.
Aug 7, 4:07 PM EDT	TSTM WND DMG	2 Ene Phillipsburg, NJ	DOWNED TREE ON STONEHENGE DRIVE AND LYNNFIELD TERRACE. TIME ESTIMATED FROM RADAR.
Aug 7, 4:07 PM EDT	TSTM WND DMG	2 Sw Harmony, NJ	DOWNED POWER LINES ON BELVIEW ROAD AND BELVIDERE ROAD. TIME ESTIMATED FROM RADAR.
Aug 7, 4:10 PM EDT	TSTM WND DMG	1 Wnw Stewartsville, NJ	DOWNED POWER LINES AND MALFUNCTIONING STOP LIGHT NEAR UNIONTOWN ROAD AND MEMORIAL PARKWAY. TIME ESTIMATED FROM RADAR.

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
Aug 7, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 225 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: 1372 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

513 
WUUS51 KPHI 071924
SVRPHI
NJC041-PAC025-077-089-095-072015-
/O.NEW.KPHI.SV.W.0327.190807T1924Z-190807T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
324 PM EDT Wed Aug 7 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Warren County in northwestern New Jersey...
  Lehigh County in eastern Pennsylvania...
  Southeastern Carbon County in northeastern Pennsylvania...
  Southwestern Monroe County in northeastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 415 PM EDT.

* At 324 PM EDT, a severe thunderstorm was located over Coffeetown,
  or near Allentown, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
  Hellertown, Nazareth, Palmerton, Slatington, Pen Argyl, Wind Gap,
  Bath, Harmony, Alpha, Walnutport, Belfast, West Easton and Tatamy.

People attending Musikfest should seek safe shelter immediately!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4070 7510 4046 7554 4061 7570 4065 7568
      4073 7577 4074 7576 4076 7580 4102 7534
TIME...MOT...LOC 1924Z 234DEG 26KT 4064 7559 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

1 follow-up statement

541 
WWUS51 KPHI 071950
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
350 PM EDT Wed Aug 7 2019

PAC025-077-071958-
/O.CAN.KPHI.SV.W.0327.000000T0000Z-190807T2015Z/
Lehigh PA-Carbon PA-
350 PM EDT Wed Aug 7 2019

...THE SEVERE THUNDERSTORM WARNING FOR LEHIGH AND SOUTHEASTERN CARBON
COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM EDT for
northwestern New Jersey...and eastern and northeastern Pennsylvania.

LAT...LON 4070 7510 4056 7536 4060 7540 4062 7538
      4067 7543 4066 7547 4068 7550 4079 7554
      4081 7552 4082 7548 4085 7549 4102 7534
TIME...MOT...LOC 1948Z 235DEG 27KT 4074 7535 

$$

NJC041-PAC089-095-072015-
/O.CON.KPHI.SV.W.0327.000000T0000Z-190807T2015Z/
Warren NJ-Monroe PA-Northampton PA-
350 PM EDT Wed Aug 7 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN WARREN...SOUTH CENTRAL MONROE AND NORTHAMPTON
COUNTIES...

At 348 PM EDT, law enforcement reported a severe thunderstorm 
producing wind damage. This storm is located over Bath, or 8 miles 
northwest of Easton, moving northeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Law enforcement.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Easton, Bethlehem, Forks, Northampton, Wilson, Hellertown, Nazareth,
Pen Argyl, Wind Gap, Bath, Harmony, Alpha, Belfast, West Easton,
Tatamy, Steuben, Glendon, Brodheadsville, Kunkletown and Rossland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4070 7510 4056 7536 4060 7540 4062 7538
      4067 7543 4066 7547 4068 7550 4079 7554
      4081 7552 4082 7548 4085 7549 4102 7534
TIME...MOT...LOC 1948Z 235DEG 27KT 4074 7535 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 8:05 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	55 min
Aug 7, 10:02 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more	11 hr
Aug 7, 12:55 PM EDT	Special Weather Statement	PHI	Hunterdon	35 min
Aug 7, 1:02 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Warren	4 hr
Aug 7, 1:12 PM EDT	Special Weather Statement	PHI	Monmouth	33 min
Aug 7, 1:22 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	38 min
Aug 7, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	49 min
Aug 7, 1:33 PM EDT	Special Marine Warning	PHI		42 min
Aug 7, 1:38 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	52 min
Aug 7, 1:40 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	50 min
Aug 7, 1:44 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Aug 7, 1:46 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris	4 hr
Aug 7, 1:50 PM EDT	Special Marine Warning	PHI		55 min
Aug 7, 1:52 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	55 min
Aug 7, 2:01 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Somerset	97 min
Aug 7, 2:03 PM EDT	Special Marine Warning	PHI		34 min
Aug 7, 2:07 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	38 min
Aug 7, 2:16 PM EDT	Special Weather Statement	PHI	Cape May	29 min
Aug 7, 2:18 PM EDT	Areal Flood Advisory	PHI	Morris, Somerset	3 hr
Aug 7, 2:21 PM EDT	Special Marine Warning	PHI		23 min
Aug 7, 2:23 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	19 min
Aug 7, 2:27 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	32 min
Aug 7, 2:30 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	45 min
Aug 7, 2:57 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Somerset	3 hr
Aug 7, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden	40 min
Aug 7, 3:07 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	53 min
Aug 7, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	42 min
Aug 7, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	67 min
Aug 7, 3:42 PM EDT	Special Weather Statement	PHI	Middlesex	33 min
Aug 7, 3:49 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	3 hr
Aug 7, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	51 min
Aug 7, 3:59 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	46 min
Aug 7, 4:03 PM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth	4 hr
Aug 7, 4:03 PM EDT	Special Weather Statement	PHI	Mercer	42 min
Aug 7, 4:06 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	4 hr
Aug 7, 4:09 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer, Middlesex, Somerset	66 min
Aug 7, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	46 min
Aug 7, 4:20 PM EDT	Flash Flood Warning	PHI	Mercer	4 hr
Aug 7, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	63 min
Aug 7, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	41 min
Aug 7, 4:39 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Somerset	6 hr
Aug 7, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Morris, Somerset	22 min
Aug 7, 5:03 PM EDT	Special Marine Warning	PHI		42 min
Aug 7, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Salem	59 min
Aug 7, 5:34 PM EDT	Special Marine Warning	PHI		56 min
Aug 7, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	51 min
Aug 7, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	49 min
Aug 7, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 1 more	78 min
Aug 7, 6:01 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Mercer, Middlesex and 3 more	3 hr
Aug 7, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	69 min
Aug 7, 6:27 PM EDT	Special Marine Warning	PHI		63 min
Aug 7, 6:56 PM EDT	Special Marine Warning	PHI		2 hr
Aug 7, 7:09 PM EDT	Special Marine Warning	PHI		2 hr
Aug 7, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean	75 min
Aug 7, 7:42 PM EDT	Areal Flood Warning	PHI	Mercer	3 hr
Aug 7, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks	44 min
Aug 7, 2:59 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	31 min
Aug 7, 3:01 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Aug 7, 3:02 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	43 min
Aug 7, 3:24 PM EDT	Flash Flood Warning	PHI	Berks	106 min
Aug 7, 3:30 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	30 min
Aug 7, 3:31 PM EDT	Special Weather Statement	PHI	Philadelphia	44 min
Aug 7, 3:41 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	91 min
Aug 7, 4:44 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Aug 7, 6:10 PM EDT	River Flood Warning	PHI	Delaware	119 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019 Severe Thunderstorm Warnings in New Jersey, 2019 Every severe thunderstorm warning in 2019

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.