Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 401, NWS Philadelphia/Mount Holly

October 31, 20194 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 31, 2019, 9:56 PM EDT for 4 counties in Pennsylvania. It was in force for 64 min. 6 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, 9:56 PM EDT (01:56 UTC)
Expired: Oct 31, 2019, 11:00 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 Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 01:56 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, 10:14 PM EDT	TSTM WND DMG	1 Nw Upper Macungie Twp, PA	DOWNED TREES AND SHINGLES BLOWN OFF A HOME. REPORT VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Oct 31, 10:28 PM EDT	TSTM WND DMG	1 Ese Allen Twp, PA	DOWNED TREES AND WIRES ON WEAVERSVILLE ROAD. TIME ESTIMATED FROM RADAR.
Oct 31, 10:32 PM EDT	TSTM WND DMG	Sciota, PA	DOWNED TREE NEAR THE INTERSECTION OF ROUTE 209 AND NEOLA ROAD. TIME ESTIMATED FROM RADAR.
Oct 31, 10:34 PM EDT	TSTM WND DMG	1 Nnw Hanover Twp, PA	DOWNED UTILITY ON STATE HIGHWAY 512 NEAR JAINDL BOULEVARD. TIME ESTIMATED FROM RADAR.
Oct 31, 10:39 PM EDT	TSTM WND DMG	2 Ene Steuben, PA	DOWNED TREE AND WIRES NEAR THE INTERSECTION OF NEWBURG ROAD AND NAZARETH-BETHLEHEM PIKE. TIME ESTIMATED FROM RADAR.
Oct 31, 10:46 PM EDT	TSTM WND DMG	1 Wnw Roseto, PA	DOWNED UTILITY NEAR THE INTERSECTION OF BANGOR ROAD AND GARIBALDI AVENUE. 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

Brookhaven, NY (KOKX), launched 00:00Z, 1.9 hours before the alert went out and 199 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 491 m²/s²
0-3 km storm-relative helicity: 510 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

111 
WUUS51 KPHI 010156
SVRPHI
PAC025-077-089-095-010300-
/O.NEW.KPHI.SV.W.0401.191101T0156Z-191101T0300Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Lehigh County in eastern Pennsylvania...
  Southeastern Carbon County in northeastern Pennsylvania...
  Monroe County in northeastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 1100 PM EDT.

* At 956 PM EDT, severe thunderstorms were located along a line
  extending from near Tobyhanna to near Leesport, moving northeast at
  65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Allentown, Easton, Mount Pocono, Bethlehem, Forks, Emmaus,
  Northampton, East Stroudsburg, Wilson, Hellertown, Nazareth,
  Palmerton, Bangor, Slatington, Pen Argyl, Wind Gap, Bath,
  Walnutport, Belfast and West Easton.

This includes the following highways...
 Interstate 78 in New Jersey near mile marker 0.
 Interstate 80 in Pennsylvania between mile markers 294 and 314.
 Interstate 78 in Pennsylvania between mile markers 45 and 76.

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 4115 7515 4114 7509 4108 7503 4109 7497
      4098 7514 4086 7505 4085 7510 4080 7510
      4077 7513 4078 7517 4075 7519 4068 7520
      4068 7517 4061 7520 4051 7538 4042 7549
      4068 7589 4077 7569 4124 7533 4125 7513
TIME...MOT...LOC 0156Z 214DEG 58KT 4120 7538 4046 7593 

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

Iovino

1 follow-up statement

570 
WWUS51 KPHI 010226
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1026 PM EDT Thu Oct 31 2019

PAC025-077-089-095-010300-
/O.CON.KPHI.SV.W.0401.000000T0000Z-191101T0300Z/
Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
1026 PM EDT Thu Oct 31 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR LEHIGH...SOUTHEASTERN CARBON...CENTRAL MONROE AND NORTHAMPTON
COUNTIES...

At 1026 PM EDT, severe thunderstorms were located along a line
extending from near Pecks Pond to near Ancient Oaks, moving northeast
at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, East
Stroudsburg, Wilson, Hellertown, Nazareth, Bangor, Pen Argyl, Wind
Gap, Bath, Belfast, West Easton, Tatamy, East Bangor, Steuben and
Glendon.

This includes the following highways...
 Interstate 78 in New Jersey near mile marker 0.
 Interstate 80 in Pennsylvania between mile markers 300 and 314.
 Interstate 78 in Pennsylvania between mile markers 49 and 76.

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 4115 7515 4114 7509 4108 7503 4109 7497
      4098 7514 4086 7505 4085 7510 4080 7510
      4077 7513 4078 7517 4075 7519 4068 7520
      4068 7517 4061 7520 4051 7538 4042 7549
      4054 7568 4075 7558 4124 7524 4125 7513
TIME...MOT...LOC 0226Z 212DEG 51KT 4131 7506 4057 7561 

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, 8:11 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	64 min
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, 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.