Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 398, NWS Philadelphia/Mount Holly

October 31, 2019Berks County, Carbon County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 31, 2019, 8:11 PM EDT for Berks County, Carbon County, Lehigh County, Pennsylvania. It was in force for 64 min. 4 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: Oct 31, 2019, 8:11 PM EDT (00:11 UTC)
Expired: Oct 31, 2019, 9:15 PM EDT
In force: 64 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Berks County, PA, Carbon County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 160 km from the middle of the area, began a volume at 00:11 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
Oct 31, 8:30 PM EDT	TSTM WND DMG	2 N Mount Aetna, PA	TREES AND WIRES DOWN NEAR LANCASTER AVENUE. TIME ESTIMATED FROM RADAR.
Oct 31, 8:57 PM EDT	TSTM WND DMG	Bethel, PA	DOWNED TREES AND POWER LINES REPORTED IN THE AREA. TIME ESTIMATED FROM RADAR.
Oct 31, 8:59 PM EDT	TSTM WND DMG	1 Ne Mount Aetna, PA	DOWNED TREE AND WIRES ON TEMPLE ROAD. TIME ESTIMATED FROM RADAR.
Oct 31, 9:23 PM EDT	TSTM WND DMG	Shartlesville, PA	DOWNED TREES AND POWER LINES IN THE AREA. 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
Oct 31, 7:56 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.2 hours before the alert went out and 233 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: 529 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 827 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 623 m²/s²
0-3 km storm-relative helicity: 752 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 9.8

Open this sounding in Storm Lab

The text

As transmitted.

090 
WUUS51 KPHI 010011
SVRPHI
PAC011-025-077-010115-
/O.NEW.KPHI.SV.W.0398.191101T0011Z-191101T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
811 PM EDT Thu Oct 31 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Berks County in eastern Pennsylvania...
  Northwestern Lehigh County in eastern Pennsylvania...
  Carbon County in northeastern Pennsylvania...

* Until 915 PM EDT.

* At 811 PM EDT, severe thunderstorms were located along a line
  extending from Branchdale to New Oxford, moving northeast at 50
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lehighton, Jim Thorpe, Hamburg, Nesquehoning, Womelsdorf,
  Weatherly, Newmanstown, Bernville, Strausstown, New Mahoning,
  Wanamakers, Lake Harmony, Penn Forest Reservoir, Albrightsville,
  Christmans, Meckesville, Lansford, Summit Hill, Beaver Meadows and
  Parryville.

This includes the following highways...
 Interstate 80 in Pennsylvania between mile markers 277 and 285.
 Interstate 78 in Pennsylvania between mile markers 10 and 35.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 4052 7634 4052 7625 4058 7606 4058 7601
      4065 7598 4074 7576 4091 7599 4101 7573
      4105 7577 4109 7577 4113 7567 4099 7550
      4032 7616 4049 7643
TIME...MOT...LOC 0011Z 234DEG 44KT 4066 7630 3984 7707 

HAIL...<.75IN
WIND...60MPH
 
$$

Iovino

1 follow-up statement

258 
WWUS51 KPHI 010039
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
839 PM EDT Thu Oct 31 2019

PAC011-025-077-010115-
/O.CON.KPHI.SV.W.0398.000000T0000Z-191101T0115Z/
Berks PA-Lehigh PA-Carbon PA-
839 PM EDT Thu Oct 31 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTHWESTERN BERKS...NORTHWESTERN LEHIGH AND CARBON COUNTIES...

At 838 PM EDT, severe thunderstorms were located along a line
extending from near Hometown to Manchester, moving northeast at 50
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lehighton, Jim Thorpe, Hamburg, Nesquehoning, Womelsdorf, Weatherly,
Newmanstown, Bernville, Strausstown, New Mahoning, Wanamakers, Lake
Harmony, Penn Forest Reservoir, Albrightsville, Christmans,
Meckesville, Lansford, Summit Hill, Beaver Meadows and Parryville.

This includes the following highways...
 Interstate 80 in Pennsylvania between mile markers 277 and 285.
 Interstate 78 in Pennsylvania between mile markers 10 and 35.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 4052 7634 4052 7625 4058 7606 4058 7601
      4065 7598 4074 7576 4091 7599 4101 7573
      4105 7577 4109 7577 4113 7567 4099 7550
      4032 7616 4049 7643
TIME...MOT...LOC 0038Z 234DEG 44KT 4085 7595 4004 7672 

HAIL...<.75IN
WIND...60MPH
 
$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 31, 8:58 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	62 min
Oct 31, 9:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	55 min
Oct 31, 9:41 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Oct 31, 9:56 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Oct 31, 9:56 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	64 min
Oct 31, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	67 min
Oct 31, 10:43 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	77 min
Oct 31, 10:45 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Oct 31, 11:08 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Oct 31, 11:14 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe, Northampton	4 hr
Oct 31, 11:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	60 min
Oct 31, 11:32 PM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	14 min
Oct 31, 11:54 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	66 min
Oct 31, 11:54 PM EDT	Tornado Warning	PHI	Bucks	36 min
Nov 1, 1:43 AM EDT	Areal Flood Warning	PHI	Berks	4 hr
Nov 1, 2:28 AM EDT	River Flood Warning	PHI	Chester	4 hr
Nov 1, 3:02 AM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	5 hr
Nov 1, 3:06 AM EDT	Areal Flood Warning	PHI	Carbon, Monroe, Northampton	4 hr
Nov 1, 3:31 AM EDT	Freeze Watch	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	6 hr
Nov 1, 9:12 AM EDT	Freeze Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	25 hr
Nov 1, 3:16 PM EDT	Frost Advisory	PHI	Philadelphia	19 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.