Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 106, NWS Philadelphia/Mount Holly

July 20, 2017Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 20, 2017, 5:35 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 55 min. 5 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 20, 2017, 5:35 PM EDT (21:35 UTC)
Expired: Jul 20, 2017, 6:30 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carbon County, PA, Monroe County, PA

The radar

The Binghamton radar (KBGM), 141 km from the middle of the area, began a volume at 21:38 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 20, 6:05 PM EDT	TSTM WND DMG	2 Nne Albrightsville, PA	TREES DOWN ON POWERLINES. TIME ESTIMATED FROM RADAR.
Jul 20, 6:07 PM EDT	TSTM WND DMG	Leonardsville, PA	TREE DOWN ON INTERSTATE 80 AT MILE MARKER 274...BLOCKING THE ROAD.
Jul 20, 6:15 PM EDT	TSTM WND DMG	Blakeslee, PA	SEVERAL TREES DOWN ON ROUTE 940 FROM BLAKESLEE WESTWARD TO MOOSEY WOOD ROAD. TIME APPROXIMATED FROM RADAR.
Jul 20, 6:26 PM EDT	TSTM WND DMG	1 Ene Hickory Run, PA	SEVERAL TREES DOWN ALONG ROUTE 534 IN HICKORY RUN STATE PARK. TIME APPROXIMATED FROM RADAR.
Jul 20, 6:32 PM EDT	TSTM WND DMG	Parryville, PA	TREES AND POWERLINES DOWN. 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
Jul 20, 5:03 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.6 hours before the alert went out and 234 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: 14 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1647 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

176 
WUUS51 KPHI 202135
SVRPHI
PAC025-089-202230-
/O.NEW.KPHI.SV.W.0106.170720T2135Z-170720T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
535 PM EDT THU JUL 20 2017

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Carbon County in northeastern Pennsylvania...
  Southwestern Monroe County in northeastern Pennsylvania...

* Until 630 PM EDT

* At 534 PM EDT, a severe thunderstorm was located over Sugar Notch,
  or near Wilkes-Barre, moving southeast at 35 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect damage to 
           trees and power lines. 

* This severe thunderstorm will be near,
  Blakeslee around 600 PM EDT. 
  Albrightsville and Lake Harmony around 605 PM EDT. 
  Meckesville and Christmans around 610 PM EDT. 
  Jonas, Penn Forest Reservoir and Beltzville State Park around 615 
  PM EDT. 
  Kresgeville and Sun Valley around 620 PM EDT. 
  Gilbert and Brodheadsville around 625 PM EDT. 
  Rossland, Kunkletown and Saylorsburg around 630 PM EDT. 

Other locations impacted by this severe thunderstorm include
Trachsville, Weissport, Fiddletown, Parryville, Beaver Meadows,
Weissport East, Merwinsburg, Effort, Tresckow and Lansford.

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 4112 7565 4113 7563 4089 7526 4087 7527
      4082 7545 4081 7554 4078 7567 4073 7576
      4081 7588 4091 7599 4101 7573 4103 7574
      4105 7577 4109 7577 4113 7567
TIME...MOT...LOC 2134Z 307DEG 32KT 4118 7592 

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

Robertson

1 follow-up statement

202 
WWUS51 KPHI 202205
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
605 PM EDT THU JUL 20 2017

PAC025-089-202230-
/O.CON.KPHI.SV.W.0106.000000T0000Z-170720T2230Z/
Carbon PA-Monroe PA-
605 PM EDT THU JUL 20 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CARBON AND SOUTHWESTERN MONROE COUNTIES...

At 604 PM EDT, severe thunderstorms were located along a line
extending from near Blakeslee to near Drums to Mifflinville, moving
southeast at 35 mph.

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

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect damage to 
         trees and power lines. 

These severe storms will be near...
  Lake Harmony and Blakeslee around 610 PM EDT. 
  Albrightsville and Christmans around 615 PM EDT. 
  Meckesville and Penn Forest Reservoir around 620 PM EDT. 
  Weatherly, Sun Valley and Jonas around 625 PM EDT. 
  Lehighton, Jim Thorpe, Nesquehoning, Brodheadsville, Gilbert, 
  Kresgeville, Rossland and Saylorsburg around 630 PM EDT. 

Other locations impacted by these severe thunderstorms include
Trachsville, Weissport, Fiddletown, Parryville, Beaver Meadows,
Weissport East, Merwinsburg, Effort, Tresckow and Lansford.

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 4112 7565 4113 7563 4089 7526 4087 7527
      4082 7545 4081 7554 4078 7567 4073 7576
      4081 7588 4091 7599 4101 7573 4103 7574
      4105 7577 4109 7577 4113 7567
TIME...MOT...LOC 2204Z 303DEG 29KT 4108 7565 4106 7599 4101 7628 

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

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 3:43 AM EDT	Heat Advisory	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	15 hr
Jul 20, 5:37 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	53 min
Jul 20, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	53 min
Jul 20, 6:24 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	66 min
Jul 20, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Carbon, Lehigh, Northampton	60 min
Jul 20, 7:52 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	53 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2017 Every severe thunderstorm warning in 2017

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.