Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 347, NWS Philadelphia/Mount Holly

August 8, 2019Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 8, 2019, 5:31 PM EDT for Monroe County, Pennsylvania. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 8, 2019, 5:31 PM EDT (21:31 UTC)
Expired: Aug 8, 2019, 6:15 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Monroe County, PA

The radar

The Binghamton radar (KBGM), 129 km from the middle of the area, began a volume at 21:34 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.

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 8, 4:43 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.5 hours before the alert went out and 205 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: 7 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

915 
WUUS51 KPHI 082131
SVRPHI
PAC089-082215-
/O.NEW.KPHI.SV.W.0347.190808T2131Z-190808T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
531 PM EDT Thu Aug 8 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Monroe County in northeastern Pennsylvania...

* Until 615 PM EDT.

* At 530 PM EDT, a severe thunderstorm was located over Lehigh, or 10
  miles north of Mount Pocono, moving east at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Mount Pocono, Tobyhanna, Henryville, Echo Lake, Paradise Valley,
  Werry Lake, Gouldsboro State Park, Skytop, Mountainhome,
  Canadensis, Alpine Mountain and Cresco.

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.

Torrential rainfall is occurring with this storm, and may lead to 
urban and small stream flooding. Do not drive your vehicle through 
flooded roadways.

&&

LAT...LON 4115 7515 4114 7509 4108 7503 4103 7507
      4119 7555 4123 7554 4122 7551 4123 7551
      4125 7513
TIME...MOT...LOC 2130Z 283DEG 31KT 4127 7543 

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

SFJ

2 follow-up statements

753 
WWUS51 KPHI 082153
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
553 PM EDT Thu Aug 8 2019

PAC089-082215-
/O.CON.KPHI.SV.W.0347.000000T0000Z-190808T2215Z/
Monroe PA-
553 PM EDT Thu Aug 8 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHERN MONROE COUNTY...

At 553 PM EDT, a severe thunderstorm was located over Gouldsboro
State Park, or 7 miles north of Mount Pocono, moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Mount Pocono, Tobyhanna, Henryville, Echo Lake, Paradise Valley,
Werry Lake, Gouldsboro State Park, Skytop, Mountainhome, Canadensis,
Alpine Mountain and Cresco.

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 4115 7515 4114 7509 4108 7503 4103 7507
      4119 7555 4123 7554 4122 7551 4123 7551
      4125 7513
TIME...MOT...LOC 2153Z 285DEG 25KT 4122 7540 

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

SFJ

318 
WWUS51 KPHI 082211
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
611 PM EDT Thu Aug 8 2019

PAC089-082220-
/O.EXP.KPHI.SV.W.0347.000000T0000Z-190808T2215Z/
Monroe PA-
611 PM EDT Thu Aug 8 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MONROE COUNTY WILL
EXPIRE AT 615 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until midnight EDT for
northeastern Pennsylvania.

LAT...LON 4115 7515 4114 7509 4108 7503 4103 7507
      4119 7555 4123 7554 4122 7551 4123 7551
      4125 7513
TIME...MOT...LOC 2210Z 283DEG 31KT 4119 7523 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 10:36 PM EDT	Areal Flood Warning	PHI	Philadelphia	87 min
Aug 8, 3:56 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	104 min
Aug 8, 6:39 PM EDT	Special Weather Statement	PHI	Northampton	36 min
Aug 8, 6:49 PM EDT	Special Weather Statement	PHI	Chester, Montgomery	26 min
Aug 8, 7:12 PM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery, Philadelphia	33 min
Aug 8, 7:40 PM EDT	Special Weather Statement	PHI	Bucks, Philadelphia	35 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.