Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly

June 13, 2018Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 13, 2018, 10:56 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 49 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: Jun 13, 2018, 10:56 PM EDT (02:56 UTC)
Expired: Jun 13, 2018, 11:45 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

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

The radar

The Philadelphia radar (KDIX), 135 km from the middle of the area, began a volume at 02:57 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
Jun 13, 11:31 PM EDT	TSTM WND DMG	1 N Columbia, NJ	LARGE BRANCHES BLOCKING LANE ON I-80W.

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 00:00Z, 2.9 hours before the alert went out and 200 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: 11 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 225 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

787 
WUUS51 KPHI 140256
SVRPHI
NJC041-PAC089-095-140345-
/O.NEW.KPHI.SV.W.0032.180614T0256Z-180614T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1056 PM EDT WED JUN 13 2018

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Warren County in northwestern New Jersey...
  Southern Monroe County in northeastern Pennsylvania...
  Northeastern Northampton County in eastern Pennsylvania...

* Until 1145 PM EDT.

* At 1054 PM EDT, severe thunderstorms were located along a line
  extending from near Analomink to Jonas, moving southeast at 40 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  East Stroudsburg, Blairstown, Bangor, Pen Argyl, Wind Gap,
  Belvidere, Hope, Belfast, East Bangor, Stormville, Brodheadsville,
  Kunkletown, Werry Lake, Gilbert, Millbrook, Delaware Water Gap,
  Tannersville, Rossland, Hernyville and Kresgeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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 4108 7503 4110 7497 4098 7484 4073 7517
      4081 7548 4083 7548 4095 7557 4099 7550
      4102 7552 4111 7518 4111 7505
TIME...MOT...LOC 0254Z 301DEG 34KT 4105 7517 4097 7554 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

CMS

2 follow-up statements

748 
WWUS51 KPHI 140313
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1113 PM EDT WED JUN 13 2018

NJC041-PAC089-095-140345-
/O.CON.KPHI.SV.W.0032.000000T0000Z-180614T0345Z/
Warren NJ-Monroe PA-Northampton PA-
1113 PM EDT WED JUN 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR NORTHERN WARREN...SOUTHEASTERN MONROE AND NORTHEASTERN
NORTHAMPTON COUNTIES...

At 1112 PM EDT, severe thunderstorms were located along a line
extending from near Echo Lake to Columbia to Rossland, moving
southeast at 50 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
East Stroudsburg, Blairstown, Bangor, Pen Argyl, Wind Gap, Belvidere,
Hope, Belfast, East Bangor, Stormville, Brodheadsville, Kunkletown,
Werry Lake, Gilbert, Millbrook, Delaware Water Gap, Rossland,
Saylorsburg, Columbia and Echo Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

In addition to 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 4089 7552 4098 7524 4111 7517 4111 7505
      4108 7503 4110 7497 4098 7484 4073 7517
      4081 7548 4083 7548
TIME...MOT...LOC 0312Z 293DEG 43KT 4103 7502 4093 7511 4087 7542 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

CMS

364 
WWUS51 KPHI 140341
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1141 PM EDT WED JUN 13 2018

NJC041-PAC089-095-140350-
/O.EXP.KPHI.SV.W.0032.000000T0000Z-180614T0345Z/
Warren NJ-Monroe PA-Northampton PA-
1141 PM EDT WED JUN 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WARREN...SOUTHEASTERN
MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES WILL EXPIRE AT 1145 PM
EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

LAT...LON 4089 7552 4098 7524 4111 7517 4111 7505
      4108 7503 4110 7497 4098 7484 4073 7517
      4081 7548 4083 7548
TIME...MOT...LOC 0340Z 301DEG 34KT 4090 7474 4080 7483 4074 7514 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 11:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	33 min
Jun 13, 11:59 PM EDT	Special Weather Statement	PHI	Somerset	31 min
Jun 13, 9:55 PM EDT	Special Weather Statement	PHI	Carbon	50 min
Jun 13, 10:07 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	53 min
Jun 13, 10:39 PM EDT	Tornado Warning	PHI	Monroe	36 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2018 Severe Thunderstorm Warnings in New Jersey, 2018 Every severe thunderstorm warning in 2018

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.