Alert archive / Pennsylvania / Tornado Warnings in 2018

Tornado Warning 8, NWS Philadelphia/Mount Holly

November 2, 20186 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Nov 2, 2018, 10:47 PM EDT for 6 counties in Pennsylvania. It was in force for 43 min. 2 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: Nov 2, 2018, 10:47 PM EDT (02:47 UTC)
Expired: Nov 2, 2018, 11:30 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 93 km from the middle of the area, began a volume at 02:48 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
Nov 2, 10:57 PM EDT	TSTM WND DMG	Richlandtown, PA	FEW TREES DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.
Nov 2, 10:59 PM EDT	TSTM WND DMG	1 Ene Salford Twp, PA	DOWNED TREE IN WIRES ON MILLER ROAD BETWEEN RIDGE ROAD AND SWAMP CREEK ROAD. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.

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, 2.8 hours before the alert went out and 203 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: 141 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 276 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

095 
WFUS51 KPHI 030247
TORPHI
PAC011-017-029-077-091-095-030330-
/O.NEW.KPHI.TO.W.0008.181103T0247Z-181103T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
1047 PM EDT FRI NOV 2 2018

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  East central Berks County in eastern Pennsylvania...
  Northwestern Montgomery County in southeastern Pennsylvania...
  Southeastern Lehigh County in eastern Pennsylvania...
  Northwestern Bucks County in southeastern Pennsylvania...
  Northeastern Chester County in southeastern Pennsylvania...
  South central Northampton County in eastern Pennsylvania...

* Until 1130 PM EDT.
    
* At 1047 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Gilbertsville, or 18 miles east of
  Reading, moving northeast at 35 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Schwenksville and Spring Mount around 1055 PM EDT.
  East Greenville, Green Lane and Geryville around 1100 PM EDT.
  Souderton around 1110 PM EDT.
  Quakertown and Perkasie around 1115 PM EDT.
  Pleasant Valley around 1120 PM EDT.
  Dublin around 1125 PM EDT.
  Byram, Bedminster, Tinicum, Ferndale, Ottsville, Pipersville, 
  Revere, Gardenville and Lumberville around 1130 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Harleysville, Boyertown, Pottsgrove, Red Hill, Freemansburg, Brittany
Farms-Highlands, New Britain, Pennsburg, Palmer Heights and
Coopersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4073 7527 4062 7519 4062 7520 4059 7519
      4057 7519 4057 7515 4044 7506 4042 7506
      4041 7504 4030 7496 4018 7562 4042 7572
TIME...MOT...LOC 0247Z 246DEG 29KT 4032 7558 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

SFJ

2 follow-up statements

301 
WWUS51 KPHI 030303
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1103 PM EDT FRI NOV 2 2018

PAC011-029-030311-
/O.CAN.KPHI.TO.W.0008.000000T0000Z-181103T0330Z/
Berks PA-Chester PA-
1103 PM EDT FRI NOV 2 2018

...THE TORNADO WARNING FOR EAST CENTRAL BERKS AND NORTHEASTERN
CHESTER COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled. 
However, a severe thunderstorm warning remains in effect for 
portions of this area.

LAT...LON 4073 7527 4062 7519 4062 7520 4059 7519
      4057 7519 4057 7515 4044 7506 4042 7506
      4041 7504 4030 7496 4023 7537 4053 7556
TIME...MOT...LOC 0301Z 244DEG 39KT 4040 7536 

$$

PAC017-077-091-095-030330-
/O.CON.KPHI.TO.W.0008.000000T0000Z-181103T0330Z/
Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
1103 PM EDT FRI NOV 2 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT FOR NORTH
CENTRAL MONTGOMERY...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS AND
SOUTH CENTRAL NORTHAMPTON COUNTIES...
    
At 1101 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Quakertown, or 14 miles southeast of Allentown,
moving northeast at 45 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Perkasie around 1105 PM EDT.
  Dublin and Pleasant Valley around 1110 PM EDT.
  Bedminster, Ottsville, Pipersville and Gardenville around 1115 PM 
  EDT.
  Byram, Tinicum, Ferndale, Revere and Lumberville around 1120 PM 
  EDT.

Other locations impacted by this tornadic thunderstorm include
Harleysville, Coopersburg, Sellersville, Fountain Hill, Richlandtown,
Silverdale, Telford, Freemansburg, Brittany Farms-Highlands and
Trumbauersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4073 7527 4062 7519 4062 7520 4059 7519
      4057 7519 4057 7515 4044 7506 4042 7506
      4041 7504 4030 7496 4023 7537 4053 7556
TIME...MOT...LOC 0301Z 244DEG 39KT 4040 7536 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

SFJ

646 
WWUS51 KPHI 030321
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1121 PM EDT FRI NOV 2 2018

PAC017-077-091-095-030330-
/O.EXP.KPHI.TO.W.0008.000000T0000Z-181103T0330Z/
Montgomery PA-Lehigh PA-Bucks PA-Northampton PA-
1121 PM EDT FRI NOV 2 2018

...THE TORNADO WARNING FOR NORTH CENTRAL MONTGOMERY...SOUTHEASTERN
LEHIGH...NORTHWESTERN BUCKS AND SOUTH CENTRAL NORTHAMPTON COUNTIES
WILL EXPIRE AT 1130 PM EDT...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, large hail remains likely and a Severe 
Thunderstorm Warning remains in effect for the area.

LAT...LON 4073 7527 4062 7519 4062 7520 4059 7519
      4057 7519 4057 7515 4044 7506 4042 7506
      4041 7504 4030 7496 4023 7537 4053 7556
TIME...MOT...LOC 0320Z 246DEG 29KT 4046 7518 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 2, 8:22 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	4 hr
Nov 2, 9:28 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Nov 2, 9:48 PM EDT	Special Weather Statement	PHI	Berks, Chester	27 min
Nov 2, 10:09 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	51 min
Nov 2, 10:32 PM EDT	Tornado Warning	PHI	Berks, Chester, Montgomery	28 min
Nov 2, 10:36 PM EDT	Special Weather Statement	PHI	Northampton	24 min
Nov 2, 10:45 PM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	13 hr
Nov 2, 10:53 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Nov 2, 10:53 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	67 min
Nov 2, 11:23 PM EDT	Tornado Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	24 min
Nov 2, 11:25 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Nov 2, 11:49 PM EDT	Tornado Warning	PHI	Bucks	26 min
Nov 2, 11:53 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Nov 2, 11:53 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	37 min
Nov 3, 12:20 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Nov 3, 1:03 AM EDT	River Flood Warning	PHI	Lehigh	5 hr
Nov 3, 1:29 AM EDT	Areal Flood Advisory	PHI	Monroe, Northampton	4 hr
Nov 3, 1:41 AM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Nov 3, 2:03 AM EDT	River Flood Warning	PHI	Chester	6 hr
Nov 3, 2:34 AM EDT	Areal Flood Warning	PHI	Bucks, Northampton	15 hr
Nov 3, 2:40 AM EDT	River Flood Warning	PHI	Montgomery	10 hr
Nov 3, 2:40 AM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	15 hr
Nov 3, 3:21 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Nov 3, 5:00 AM EDT	River Flood Warning	PHI	Chester, Delaware	6 hr
Nov 3, 7:01 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	5 hr
Nov 3, 11:44 AM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	8 hr
Nov 3, 5:19 PM EDT	Areal Flood Warning	PHI	Northampton	22 hr

Nearby

Tornado Warnings in Pennsylvania, 2018 Every tornado warning in 2018 Tornadoes 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.